Trabajos harrington en Reino Unido

Software Solution Architect Permanent positions available - Salary between £80,000 - £100,000 (Depending on experience) Hybrid Role - Required 2/3 days per week on site Security Clearance will be required!! You must hold either a British Passport or ILR (Visas are not accepted!) Looking for: • Up to 5 years experience in either a Solution Architect, Software Architect or similar role, • Backgroud in Software design and system integration, • Strong understanding of Cloud Platforms (AWS, Azure or Google Cloud) - Certifications in this, • Knowledge of database technologies (SQL, NoSQL), • Experience with Java, C#

Microsoft D365 F&O Consultants (SCM or Software Engineer) Permanent positions Hybrid working roles, travel on site may be required as and when needed. £55k - £75k depending on experience I'm recruiting for a number of Microsoft D365 roles for our client, they are looking for candidates who have experience within Supply Chain (SCM) or Software Engineering within Microsoft ERP. Some key required skills are listed below: • Development skills with X++ and familiar with .NET technologies, • Experience integrating D365FO with external systems, • Knowledge of C#, • Experience implementing and configuring Supply Chain and Warehousing processes within D365 If you're open to hearing more about these roles, please do get in touch!

QA Tester (Fintech / Payments) – Contract 📍 London - Remote / Hybrid ⏳ 3 Months Initial 💰 £175–£200 per day (London) OUTSIDE IR35 I’m looking for a hands-on QA Tester with a payments / fintech background to join on an initial 3-month contract, working directly with the CTO and external consultants. You must be comfortable going beyond surface-level testing — diving into APIs, databases and logs, and tracing issues end-to-end. Key requirements: • Strong manual and/or automated testing of complex web apps, • Experience testing Java / Spring Boot backends, • REST API testing (Postman / Swagger etc.), • Strong SQL skills, • React / Next.js frontend testing experience, • AWS familiarity (EC2, RDS, S3, CloudWatch) If you’re London or able to work 1 day per month in the office and available, apply now.

Backend Tech Lead London | Hybrid | £90k–£100k This is an opportunity to step into a hands-on technical leadership role within a growing backend engineering team. The company is at a natural inflection point: the engineering group is expanding from 6 to 8 engineers, and there’s a clear need to introduce structure, mentorship, and delivery ownership — without losing technical momentum. The role suits a senior backend engineer who enjoys leading by example, staying close to the codebase, and gradually taking ownership of team leadership and delivery. This is not a people-only management role. Expect an ~80/20 split between hands-on engineering and leadership responsibilities. The Role • Act as the technical lead for backend development, contributing directly to architecture and feature delivery, • Provide day-to-day mentorship and technical guidance to backend engineers, • Introduce clearer reporting lines, ownership, and delivery structure as the team scales, • Partner closely with the CTO, gradually taking on leadership responsibilities currently consuming senior leadership time, • Own the delivery of backend projects, with responsibility for execution and technical quality, • Support future team growth, including hiring, onboarding, and longer-term team design Team & Structure • Current team: 6 engineers, scaling to 8 in the near term, • Planned split into focused teams, including a dedicated data pipeline / backend platform group, • This role becomes the primary technical and delivery owner for one of those areas, • Acts as a key bridge between engineers and senior leadership What They’re Looking For • 7+ years of backend engineering experience, • Strong hands-on backend expertise, ideally in Python, • Proven experience designing and maintaining production backend systems, • Comfortable mentoring engineers and acting as a technical authority, • Experience (or strong interest) in taking on people leadership responsibilities, • Exposure to financial services is a strong plus (security, change management, regulated environments), • Pragmatic, delivery-focused mindset — someone who gets things shipped Why This Role Stands Out • Genuine hands-on leadership role — not management theatre, • Clear trust from the CTO to take ownership and step up, • Opportunity to shape team structure, culture, and delivery practices, • Real influence over architecture and backend direction, • Competitive salary around £100k, depending on experience Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role.

Business Development Representative — Institutional Clients Fintech | Data & Analytics London | Hybrid £50,000 base + commission + benefits A fast-growing fintech specialising in fixed income data analytics is hiring a BDR to support new client acquisition and account expansion across institutional markets. Working closely with an experienced sales lead, you’ll be on the front line of outbound activity, client engagement and early-stage deal execution - gaining exposure to complex sales cycles across global capital markets. What you’ll help clients achieve • Turn fragmented fixed income data into actionable insight for pricing, liquidity discovery and execution quality, • Support structured evaluations and PoCs with clear success criteria and time-to-value, • Build commercial cases that resonate with front-office, data and technology stakeholders The role New client acquisition • Own the early stages of the sales cycle: research, outbound prospecting, meeting booking and follow-ups, • Build and manage a named account list across buy-side and sell-side institutions, • Engage multiple stakeholders including front office, data, technology and procurement, • Join senior sales leads on client meetings, developing trusted relationships over time Account growth • Work with Customer Success to identify expansion and cross-sell opportunities, • Help progress trials into wider, multi-desk or multi-region rollouts Market insight & enablement • Track market trends and competitive intelligence, • Feed client insight back into product, messaging and GTM strategy, • Contribute to sales playbooks, discovery frameworks, ROI models and case studies About you • Minimum 2 years’ experience in B2B sales or business development within fintech, capital markets or market data, • Understanding of fixed income workflows and front-office buyer personas is highly desirable, • Exposure to selling data, analytics or SaaS into financial institutions is a strong advantage, • Confident communicator with a value-based, ROI-led sales approach, • Analytical, structured and commercially curious, • Strong technical aptitude and CRM discipline (HubSpot or similar), • Fluent English required; additional European languages a plus What’s on offer • £50,000 base salary plus performance-linked commission, • 25 days’ holiday plus public holidays, • Hybrid working (home and central London office), • Direct exposure to senior sales leadership and founders, • Clear development path into a full Account Executive role, • Opportunity to help shape the go-to-market engine of a scaling fintech Please contact Ian Bailey at Harrington Starr for full details

Software Engineer Tech Stack: C#, .NET, Python, AI Development, SQL, Azure London - Onsite Salary Range: £50,000 - £90,000 Harrington Starr has partnered with a boutique Investment Bank, with decades of experience and exceptional performance. They are currently seeking to hire a Polyglot Engineer possessing strong experience developing front office applications and systems, written in C# and Python. If you have a deep interest working with modern technologies, building reliable business applications this could be the role for you. Responsibilities: • Design and develop new front office application utilising C#, .NET, Python, • Working on internal systems to maintain quality and standards, • Utilising historical data for analytics, automation and strategic decision making, • Integration of modern technologies and use of AI, • Daily interaction to quickly solve any issues for front office Benefits: • The ability to convert essential business needs and support front office functions, • Excellent base salary up to £90,000 based on experience and domain knowledge, • Exceptional bonus and benefits (health and dental care, life insurance), • Working flexibility Key Requirements: • BSc Computer Science or related Mathematical degree, • Excellent knowledge and experience developing with C#, .NET, Python, • Good experience developing front office systems, interacting with various stakeholders, • Excellent communication, • Strong commercial development experience with AI technologies, • Un-restricted right to work in the UK If you would like to book in a confidential phone call to discuss this opportunity in further detail, please apply below or send through a copy of your up-to-date CV via email to

Python Engineer Sports Trading What you’ll tackle • Translate data-flow headaches into buildable tech projects, managing data pipelines, • Python engineering to stand-up analytics services, REST APIs and lightweight front-ends., • Data ingestion (SQL, files, feeds), business logic, web/UI, CI pipelines and Linux deployment., • White-board with quants, ask clarifying questions, iterate live and keep comms flowing. What you need • 1 + years building production-grade Python systems for data-heavy businesses; comfortable with tests, version control and optimisation., • Confident SQL, exposure to REST and messaging (Rabbit, Kafka, etc.), and enough Linux to troubleshoot on the command line., • Solid grounding in financial products & risk metrics—equities, bonds and derivatives; VaR, stress, PnL explain., • Excellent communicator who never “goes dark”, loves prototyping and isn’t afraid to ask the awkward question., • A self-starter ready to jump into the deep end and push tech (and yourself) beyond comfort zones, and a love for sports betting is a plus! Interested? Reply with your CV or reach out for a confidential chat.

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Commodities Brokerage and they are looking for a Senior C#, .NET Software Engineer to join their growing front office team! This role provides the perfect opportunity to launch your career in a well-established, dynamic environment. Key responsibilities: • Immediate contribution to design, coding, and testing of modern web applications., • Design and development of applications used both internally and externally., • Consistently suggesting and implementing new and innovative ideas., • Build meaningful relationships quickly and effectively, collaborating with insight and agility. Benefits: • Fully funded learning and certifications., • Private medical insurance., • Pension scheme., • Hybrid working in Central London., • Excellent salary base of up to £120,000 based on experience. Key skills, experience and qualifications required: • Excellent knowledge and experience with C#, .NET and React., • Strong experience with TypeScript/JavaScript., • Experience with cloud technology – specifically AWS., • Knowledge of TDD/BDD., • Excellent communication skills., • Unrestricted right to work in the UK. To book in a 15 minute confidential call please apply via the link provided.

New Business Sales Executive Fintech London Hybrid £75,000 - £100K Base + Uncapped Commission We’re working with a fast-growing fintech scaleup in the capital markets space, now hiring a additional salesperson to drive new business across the UK and EMEA. This is a hunter role, perfect for someone who thrives on creating pipeline, opening doors, and closing complex enterprise deals in financial services. The role: You’ll take full ownership of new logo acquisition across institutional clients, from asset managers to banks, exchanges, and corporates. Reporting into the Head of Sales, you’ll lead consultative sales cycles (average deal sizes £80K–£120K+) and engage senior decision-makers across the region. Backed by a strong marketing engine and a solid GTM foundation, you’ll have all the tools you need to make a real commercial impact. What you’ll be doing: • Prospect and convert new clients across financial markets in EMEA, • Lead multi-stakeholder sales processes from first contact to signature, • Work cross-functionally with marketing and product to shape messaging and strategy, • Represent the business at client meetings and selected industry events (EU travel ~quarterly), • Provide structured market feedback to influence ongoing product development You are someone who: • Has a strong track record of new business sales in fintech or capital markets, • Understands the institutional client landscape (buy-side, sell-side, venues, issuers), • Is confident leading complex, long-cycle B2B sales (ideally with SaaS or data solutions), • Can build credibility at C-level while keeping a sharp focus on conversion, • Is proactive, driven, and structured - able to self-manage in a scale up environment, • Uses CRM and sales tools effectively (HubSpot) The package: • £75,000 - £100K base salary, • Uncapped commission (c.10% per deal, with accelerators), • Commission paid monthly on signature, • Expected first-year revenue target: ~£500K, • Additional uplift on renewals, • Hybrid setup: 2–3 days in London office You’ll be joining a well-funded, high-calibre team with ambitious growth plans and serious backing. If you’re a results-focused sales lead ready to build something meaningful, this is the opportunity. Please contact Ian Bailey at Harrington Starr for full details

Sales Manager London | Office-based £45k–£90k base + Commission + Equity A venture-backed AI SaaS business is entering commercial launch phase and hiring its first senior commercial leader. The product automates operational workflows within the UK property sector using applied AI. It removes administrative burden, improves compliance accuracy, and materially increases operational capacity for enterprise property groups. This hire will own enterprise revenue from the ground up. You will: • Design and execute enterprise sales strategy, • Open and close complex, high-value accounts, • Establish repeatable GTM motion, • Work directly with founders on pricing, positioning and segmentation, • Lay foundations for a future sales team There is a defined pathway into Head of Sales within ~24 months for the right individual. Initially, this is a hands-on revenue position. Leadership responsibility scales with revenue. You are: We are targeting a high-performing, ambitious commercial operator with: • 2–5 years’ B2B sales experience, • Proven success closing meaningful contract values, • Clear hunger to step into a Lead / future Head of Sales role, • Strong commercial instinct and ownership mentality Sector experience is critical. You must understand the UK property / lettings / real estate ecosystem. Exceptional SaaS or AI candidates from adjacent verticals may be considered, but sector fluency will carry significant weight. This role is London-based and requires 5 days per week in-office. It suits someone early in their career who wants exposure, pace and real responsibility. What Success Looks Like • Building enterprise pipeline from zero, • Landing the company’s first wave of flagship clients, • Creating structure around forecasting, reporting and KPIs, • Helping shape commercial hiring strategy You must be comfortable selling innovation in early-stage conditions. Compensation • £45k–£90k base (DoE), • Commission, • Equity participation, • Significant upside tied to growth trajectory Candidates expecting £90k+ base will need to demonstrate exceptional track record and commercial maturity. Please contact Ian Bailey at Harrington Starr for full details

Software Product Engineer – AWS Contact Centre 12‑month contract | Up to £700/day | UK Hybrid We’re hiring hands‑on Senior Engineers to build and enhance AI‑enabled Amazon Connect platforms for a major UK enterprise. You’ll work with: • Amazon Connect, Contact Flows, Amazon Lex, Lambda, • TypeScript / JavaScript / Python, • CI/CD, serverless, monitoring, • LLM‑powered features and AWS AI tools You must be: • A hands‑on coder (not an architect), • Experienced with Connect + Lex (visible in your CV), • Strong across AWS, serverless and DevOps, • Comfortable working in large, complex environments 12‑month contract, hybrid working, up to £700/day. Click the link to apply or Email: Must be able to work 2-3 days in London.

Head of Sales – Cross-Border Payments (High-Risk Verticals) Fintech / Payments Infrastructure London – Canary Wharf (Hybrid) £120,000 – £150,000 base x 2 OTE An international fintech is expanding its global payments infrastructure and is hiring a Head of Sales in London to lead commercial growth across the UK and Europe. The company operates a specialised multi-currency payments platform designed for complex and high-risk industries, enabling businesses to move funds globally while navigating regulatory and banking constraints. The platform is already supporting enterprise customers and generating meaningful revenue through payment orchestration and cross-border settlement solutions. With further expansion underway across the UK, US and Asia, the firm is investing in senior commercial leadership to accelerate revenue growth and build a high-performing sales organisation. The Role This is a player-coach leadership position combining hands-on sales execution with team development. Initially you will take ownership of the entire sales lifecycle, developing new client relationships, managing strategic accounts and building pipeline across industries where payments infrastructure is critical to growth. Alongside your own quota, you will help scale the commercial team and implement the sales playbook for international expansion. Key responsibilities include: • Winning new enterprise clients across payments-intensive sectors, • Managing complex sales cycles from origination through onboarding, • Building and executing a repeatable sales strategy for UK and European markets, • Developing pipeline through direct outreach, partnerships and referrals, • Leading and mentoring a growing international sales team, • Working closely with compliance and risk teams to ensure sustainable growth, • Contributing to broader go-to-market strategy as the business expands globally Target Customers The platform supports industries that require specialist payments infrastructure, including: • Digital asset and blockchain businesses, • Online gaming and regulated wagering platforms, • FX / CFD brokers, • International merchants operating in complex regulatory environments Typical solutions involve multi-currency accounts, payment routing and cross-border settlement capabilities for businesses operating globally. What They’re Looking For This role suits a senior payments sales professional who enjoys building markets and closing complex deals. You will likely bring: • Strong background in payments, fintech or banking infrastructure sales, • Experience selling into regulated or higher-risk payment environments, • Track record of closing enterprise-level revenue deals, • Ability to operate as both individual contributor and team leader, • Experience managing relationships across compliance, risk and banking partners, • Multilingual capability (highly desirable for international client engagement) Experience within payment infrastructure providers, EMI platforms or cross-border payment firms would be particularly relevant. Location The role is based in Canary Wharf, with the team relocating to a new office in 1 Canada Square. Leadership presence in the office is expected at least three days per week. Growth Opportunity The company is currently expanding its leadership team across several strategic areas including: • Digital assets / blockchain leadership, • Global compliance and onboarding functions, • Safeguarding and regulatory leadership, • Senior technology leadership This creates a genuine opportunity to join a business at a pivotal international scaling phase and play a central role in shaping its commercial success. Please contact Ian Bailey at Harrington Starr for full details

C++ Software Engineer – Low‑Latency Trading Contract - OUTSIDE IR35 Rate - Dependent on skills London - Hybrid working 50% in office. You'll be joining a high‑performance trading technology firm. Helping to building ultra‑low‑latency systems powering global electronic markets. Working alongside world‑class engineers solving complex challenges across C++, Linux, networking, and hardware‑accelerated trading pipelines. What You'll Do • Build and optimise high‑performance, low‑latency C++ applications, • Develop real‑time systems interacting directly with global exchanges, • Work closely with FPGA, network, and infrastructure teams, • Improve latency, throughput, and reliability across mission‑critical systems, • Exceptional modern C++ (C++17/20) development experience, • Strong Linux systems knowledge and debugging skills, • Experience in low‑latency, multithreaded or high‑performance environments, • Understanding of networking (TCP/UDP, kernel bypass, feed handlers), • Cutting‑edge technology environment, • Fast‑paced engineering‑driven culture 🔗 Click the link provided OR 📩 Email:

Full Stack Engineer London / Hybrid | 4 Days Onsite FTC £70,000 - £85,000 Harrington Starr has partnered with a leading financial services firm who are undergoing a major transformation of its internal technology landscape, modernising a suite of business-critical applications used across front office, compliance and operations teams. They are now looking for an experienced Full Stack Engineer to join their Technology function and play a key role in migrating legacy SharePoint systems into a modern application portal built with contemporary web technologies. This is a high-impact role working closely with both technical teams and senior business stakeholders. Key Responsibilities: • Design and build full stack applications using C#, SQL Server and React, • Support and maintain live SharePoint applications during the transition phase, • Work within agile sprint cycles to deliver high-quality solutions, • Collaborate with business users to translate requirements into technical designs, • Ensure compliance with cyber security, data protection and regulatory standards, • Act as a technical escalation point within the Technology team, • Produce clear documentation and support knowledge transfer to BAU teams, • Work with third-party vendors where required Key Requirements: • 3+ years’ experience building applications with C#, SQL and React, • 2+ years’ experience developing or supporting SharePoint systems, • Strong front-end skills (HTML, CSS, JavaScript), • Experience working in agile delivery environments, • Exposure to regulated industries (financial services preferred), • Strong communication skills and stakeholder management ability Key Benefits: • Work on a large-scale modernisation programme with real business impact, • High level of autonomy and technical ownership, • Exposure to multiple areas of financial services, • Hybrid working with flexibility, • Opportunity to shape long-term internal platforms This is an excellent opportunity for a hands-on Full Stack Software Engineer to join a highly visible programme of work within a regulated financial environment. You’ll be responsible for redesigning and rebuilding core internal applications, ensuring they are scalable, secure and aligned with long-term business needs. You’ll be involved across the full lifecycle — from requirements gathering and system design through to development, deployment and handover into support. Please apply via the link provided or reach out for a confidential conversation.

C++ Developer – Market Data Up to £75,000 + Benefits + Bonuses London (1-2 days in the office) Tech: C++ and Python An award winning FinTech organisation that allows trading firms to establish their best execution strategies are seeking a Software Engineer to work on the front line of their data acquisition system. This organisation are driving change within the investment management sector and are at a critical growth period. Whoever joins them at this point will shape the future of the company and has the ability to mould their own career path. They need a confident individual with strong communication skills and the experience to back up their decisions. • You should have: At least 3 years of experience writing production code in C++ and Python, • Linux , STL, Boost, • Ideally experience with large data volumes, • Experience with working with functioning, well-tested systems., • Experience of industry-standard development methodologies such as source code control, unit testing and continuous integration. This is an opportunity for a Software Engineer to join an award winning, cutting-edge FinTech where you will have the ability to take real ownership and make a genuine impact to the business. Contact Ciara Clarke for a confidential discussion on this role.

QA Tester – Fintech Startup (Contract) London office with Hybrid working 3 Months initial contract PAying £150–£200 per day (London) Fast-growing fintech startup looking for a hands-on QA Tester with a strong payments background. You’ll work directly with the CTO, testing across Java/Spring Boot APIs, React frontends, SQL databases and AWS environments. Must be comfortable digging into logs, APIs and backend systems — not just surface-level testing. Fintech experience is essential. Available immediately? Let’s talk.

NET Developer (Contract) Location: Central London Rate: £350–£425 per day Duration: 6 months (likely extension) Start: ASAP Role Overview We are seeking an experienced .NET Developer to join our Business Intelligence IT team. You will develop and support SMBC BI business applications using C# and MS .NET Framework, working across SQL Server and Oracle databases. This role involves both new development and maintenance of existing applications, ensuring stability and compliance with change management procedures. Key Responsibilities • Develop and maintain C#/.NET applications for BI systems., • Analyse business requirements and design technical solutions., • Write and optimise T-SQL and PL/SQL scripts for data analysis., • Collaborate with DBAs and infrastructure teams in London and New York., • Support production environments, troubleshoot issues, and implement fixes., • Assist with Citrix and application server deployments for web and Windows apps., • Follow change management and release processes., • Strong experience with C# and .NET Framework (Windows and Web apps)., • Proficient in SQL Server (T-SQL) and Oracle (PL/SQL)., • Knowledge of application deployment and environment maintenance., • Experience in unit testing, QA, and documentation., • Financial services or enterprise BI experience., • Familiarity with Citrix, disaster recovery environments, and version upgrades. Apply by clicking the link provided or contract for a faster response.

We’re looking for a high-calibre Solution Engineer with a passion for performance and capital markets technology to deliver complex, front-office trading systems for leading global investment banks, asset managers, fintechs and exchanges. This role sits at the intersection of engineering excellence, client engagement, and strategic delivery — working hands-on in Java to design and build highly performant, resilient, low-latency trading platforms across OMS, EMS and exchange connectivity environments. What you’ll be doing • Designing and delivering high-performance, low-latency trading solutions in capital markets environments, • Contributing directly to the codebase on the most technically challenging aspects of client deliveries, • Architecting performant, resilient distributed systems informed by deep domain knowledge, • Building solutions across OMS, EMS, Smart Order Routing, Matching Engines, FIX gateways and Risk platforms, • Working with event-driven architectures, replicated state machines and distributed consensus systems, • Applying best practices in separation of concerns, clean architecture and test-driven / behaviour-driven development, • Advocating technical decisions to clients, stakeholders and internal teams, • Ensuring adherence to Agile delivery processes and mature SDLC standards, • Coaching and mentoring engineers, driving technical quality across teams, • Escalating and articulating technical risks clearly to leadership and clients What we’re looking for • Strong Java engineering background with a focus on highly performant, low-latency systems, • Significant experience in capital markets technology environments, • Experience building solutions within:, • Order Management Systems (OMS), • Execution Management Systems (EMS), • Experience using Aeron in high-performance capital markets or digital assets environments, • Deep understanding of distributed systems, event-driven architecture and consensus models, • Strong knowledge of data structures (maps, sets, queues, etc.), • Experience operating within Agile frameworks and structured SDLC environments, • Excellent communication skills and ability to build trusted client relationships, • Comfortable leading technical discussions and advocating architecture decisions Why this role • Direct impact on mission-critical front-office trading platforms, • Exposure to elite capital markets institutions and high-performance engineering environments, • Highly technical, architecture-driven delivery work, • Opportunity to mentor and influence engineering standards, • Collaborative, high-standard engineering culture, • Strong work/life balance with flexible hybrid working Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role.

Senior Enterprise Sales Financial Markets | Observability & Infrastructure Software London / Hybrid £120k–£140k base | £250k–£280k+ OTE uncapped This is a high-growth, PE-backed technology platform used by Tier-1 financial institutions to monitor, analyse and optimise mission-critical trading and infrastructure environments. The software sits deep within low-latency, high-throughput financial systems where uptime, performance and operational intelligence are business-critical. Following sustained global growth, new product launches and strategic acquisitions, the firm is expanding its UK Financial Services sales capability. This is a senior role focused on complex enterprise platform sales into highly technical environments. The Opportunity You will own a portfolio of major Financial Services institutions while also driving strategic new-logo growth across the UK market. The role is designed for salespeople comfortable operating in deeply technical buying environments, engaging with stakeholders across: • Platform Engineering, • Infrastructure & SRE teams, • Production Engineering, • Trading Technology, • Capacity & Performance Engineering, • Enterprise Architecture You will be positioning a platform that sits at the heart of observability, operational resilience and infrastructure intelligence across complex financial ecosystems. Commercial Scope Deals are large, strategic and multi-year: • £100k+ minimum entry point, • £500k typical deal value, • £1m–£4m+ enterprise agreements Sales cycles vary from rapid expansion deals inside existing environments through to 9–12 month competitive displacement campaigns. What You’ll Be Doing • Owning and expanding relationships with major Financial Services institutions, • Identifying new technical use cases across infrastructure, trading platforms and data environments, • Leading complex enterprise sales cycles from technical discovery through to commercial close, • Engaging deeply with engineering and architecture stakeholders to position platform value, • Running structured evaluations and technical PoCs with defined operational outcomes, • Driving multi-threaded engagement across technology and commercial stakeholders, • Delivering high-quality presentations to both technical and executive audiences, • Maintaining accurate pipeline forecasting and deal progression What They’re Looking For This role is aimed at salespeople who are technically credible and commercially sharp. You will likely bring: • A proven track record selling enterprise infrastructure or platform software into Financial Services, • Experience navigating technical buying committees and engineering-led evaluations, • Confidence discussing topics such as observability, distributed systems, performance monitoring, operational resilience and modern infrastructure architecture, • A track record of closing six and seven figure enterprise software deals, • Strong commercial drive and a clear history of exceeding targets Experience from the following areas is particularly relevant: • Observability platforms, • Infrastructure monitoring, • APM / telemetry platforms, • Data infrastructure, • Market data infrastructure, • Low-latency or trading technology platforms Culture & Environment • High-performance but low-ego environment, • Salespeople trusted to run complex deals autonomously, • Strong pre-sales bench including ex-bank and buy-side technologists, • Structured, intelligent go-to-market strategy, • Opportunity to work on genuinely cutting-edge observability and AI-driven operational analytics Package • £120k–£140k base salary, • £250k–£280k+ uncapped OTE, • Enterprise-level accelerators, • Private healthcare, • Pension, • Flexible hybrid working, • Enhanced leave and wellbeing benefits For a confidential discussion, contact Ian Bailey at Harrington Starr.

Lead AI / Python Engineer London | Full-Time | High-Impact AI SaaS We’re hiring a Lead AI/Python Engineer to join a fast-scaling AI SaaS company transforming property management across the UK. This is a hands-on leadership role for someone who wants to architect systems, shape engineering standards, and build intelligent software used daily in a regulation-driven market. The Company A UK-focused AI platform automating compliance, maintenance, lettings, and tenant communications through an AI assistant capable of handling the majority of operational admin workflows. The mission is simple: remove manual friction from property management while improving compliance and tenant experience. The Role You will own backend architecture and play a central role in shaping technical direction. Key responsibilities: • Architect and build scalable backend systems in Python, • Design robust APIs and distributed services, • Lead code reviews and enforce engineering best practice, • Mentor engineers and raise overall technical standards, • Work closely with Product and Design to translate business needs into technical solutions, • Drive AI integration into production systems, • Ensure performance, security, and maintainability This is not a maintenance role. It is system ownership. What We’re Looking For • 7+ years commercial software engineering experience, • Deep Python expertise (FastAPI / Flask / Django), • Strong system design and architecture capability, • Experience with cloud-native environments and Kubernetes, • Microservices and CI/CD exposure, • Proven experience leading projects or mentoring engineers, • Strong academic background (Computer Science or related discipline) Nice to have: • Production model deployment (HuggingFace / vLLM / Ollama), • Model fine-tuning experience, • Open-source contributions Why Join • Competitive salary + equity, • Direct influence on product and engineering roadmap, • Work on applied AI solving real operational problems, • High ownership in a growing, product-led business If you are a technically strong Python engineer who wants to lead from the front and build scalable AI systems in a real-world, commercially impactful environment, this is a strong platform to do it.

Python Software Engineer – Sports Trading Technology Permanent | Full-time | London (Hybrid) Overview A technology-driven trading firm operating within global sports betting markets is looking to hire a Python Software Engineer. The business combines quantitative research, proprietary systems, and deep sports market expertise to identify inefficiencies across major exchanges and wagering markets. This role sits within a small technical team responsible for building and maintaining the internal tools and data infrastructure that support trading activity. You will work closely with traders and analysts to develop systems that process large volumes of sports data and enable real-time decision making. The Role The position focuses on building internal platforms and data pipelines used by trading teams. The successful candidate will be involved in developing new functionality, maintaining existing systems, and ensuring data reliability across the trading environment. Key Responsibilities • Develop internal tools and automation systems used by trading teams, including trading interfaces and operational platforms, • Build and maintain data pipelines responsible for collecting, processing, and storing sports data, • Identify and resolve issues within data feeds such as missing or duplicated information, • Improve and maintain existing internal software projects and infrastructure, • Analyse betting and performance data and help translate findings to traders and non-technical stakeholders, • Work closely with internal users to understand requirements and deliver technical solutions Required Experience • Around 3+ years of commercial software engineering experience, • Must come from a sports trading domain, • Strong Python development skills with solid object-oriented programming fundamentals, • Experience building or maintaining data-driven applications or pipelines, • Exposure to client-server system architecture, • Experience working with tools such as Pandas or Jupyter for data analysis, • Knowledge of databases such as MySQL or MongoDB, • Familiarity with Git and version control workflows, • Comfortable working across multiple projects in a fast-moving environment, • Strong communication skills and the ability to work with both technical and non-technical colleagues Nice to Have • Exposure to data science or machine learning, • Experience handling real-time or high-frequency data streams, • Background designing or maintaining data infrastructure Package • Competitive salary depending on experience, • Performance-related bonus, • 30 days annual leave plus bank holidays, • Private healthcare including dental and vision cover, • Life and accident insurance Contact Ciara Clarke for a confidential discussion on this role.

Head of Operations/ COO Harrington Starr are pleased to be working with a high-performance proprietary trading firm operating across global markets specialising in sports trading. The Role This position is designed for an operator who thrives close to live trading activity. The Operations Manager / COO will take ownership of day-to-day operational execution, ensuring trading activity scales cleanly, safely, and predictably. Key Responsibilities • Oversee trading operations across multiple live strategies, ensuring consistent execution standards and effective monitoring, • Partner closely with traders and researchers to ensure operational processes directly support trading performance, • Maintain oversight of capital allocation, execution workflows, and performance reporting, • Design and implement operational risk controls, exposure management frameworks, and escalation processes during drawdowns or periods of elevated volatility, • Act as the central coordination point between trading, research, engineering, and external service providers, • Own operational infrastructure including data flows, tooling, reporting, and vendor relationships, • Identify and resolve operational dependencies and issues proactively, • Contribute to hiring, team structure, and organisational scaling as the platform grows Background & Experience You will have held senior operational or leadership responsibility within a performance-driven, trading-focused environment. Relevant experience may include: • Proprietary trading firms or hedge funds, • Quantitative or systematic trading businesses, • Sports betting syndicates or professional betting operations, • Execution-focused trading, desk management, or risk management roles Skills & Attributes • Comfortable operating in fast-moving, high-pressure environments, • Confident making decisions under uncertainty and communicating clearly across technical and non-technical teams, • Solid understanding of trading execution, operational risk, and performance monitoring, • High level of technical literacy across trading systems, data pipelines, and execution tooling, • Pragmatic, results-focused mindset with the ability to balance strategic oversight and hands-on delivery Please apply if you think suitable

Technical Programme Manager Harrington Starr are pleased to be partnered with a boutique investment bank operating in the UK small and mid-cap market. The firm provides advisory and corporate finance services to listed companies, supporting their strategic, corporate and financing requirements. Role Overview The Technical Programme Manager will play a central role within the Strategic Enablement function, working closely with the Chief Strategy Officer to deliver technology-driven change that supports the firm’s growth ambitions. Key Responsibilities • Lead and oversee delivery of complex, multi-workstream technology programmes, ensuring alignment with business strategy, regulatory expectations, and operational resilience requirements., • Translate strategic objectives into clear delivery roadmaps, technical requirements, and prioritised backlogs in collaboration with technology, operations, and business stakeholders., • Manage third-party vendors and technology partners, including oversight of contracts, delivery schedules, service levels, and integration activity., • Own and optimise Jira, Confluence, and related Atlassian tools, ensuring high-quality workflow design, reporting, and transparency., • Identify and resolve delivery risks, architectural dependencies, and technical blockers in collaboration with engineering and infrastructure teams., • Champion the use of modern tooling and intelligent automation, including AI-assisted solutions, to enhance analysis, documentation, and delivery efficiency. Key Requirements • Proven experience delivering complex, multi-workstream technology programmes within financial services, ideally in investment banking, capital markets, or another regulated environment., • Strong understanding of enterprise technology architecture, including infrastructure, cloud services, networking, security controls, data platforms, and application lifecycle management., • Hands-on expertise with Atlassian tools (including Jira and Confluence), with the ability to design workflows, reporting structures, and governance frameworks., • Excellent communication skills, with the ability to translate technical risks and delivery considerations into clear business language for senior stakeholders and Board-level audiences., • Strong vendor and third-party management experience, including contract oversight, budgeting, service monitoring, and risk management., • Knowledge of regulatory and compliance considerations relevant to UK financial services, including operational resilience, data governance, and cyber security controls., • Experience working with modern integration patterns, data flows, and APIs in multi-system environments., • Familiarity with AI-assisted tooling and an interest in leveraging emerging technologies to improve delivery speed and quality. Please apply if you think suitable.

DeFi Rust Engineer – London - Salary negotiable Working with a high-calibre DeFi team building serious onchain trading infrastructure. Looking for a quant-minded engineer with a strong academic background (maths, physics, CS, engineering or similar) and a genuine obsession with onchain market mechanics. You should understand: • How liquidity behaves in concentrated AMMs (Uniswap v3-style), • Tick-range management and LP optimisation, • DEX–CEX arbitrage dynamics, • MEV structures and incentive design, • Emerging ecosystems like Hyperliquid What you’ll be doing: • Building and improving connectivity across AMMs, orderbooks and major CEXs, • Optimising pricing and execution engines across L1/L2 environments, • Designing intelligent liquidity strategies (JIT liquidity, dynamic range management), • Working on low-latency data ingestion, mempool flows and cross-rollup execution Requirements: • Advanced degree in a quantitative field, • 2+ years strong Rust and Solidity, • Experience building low-latency, high-throughput trading or onchain systems, • Strong distributed systems knowledge, • Comfortable across Linux, AWS, Docker, Git High ownership. Close collaboration with founders. Real impact on live DeFi infrastructure. London-based preferred but may look at remote candidates. Contact for a confidential discussion

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