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Senior Software Developer C#, Asp.Net, Azure, REST API's Hybrid - 2 days per week in the Southampton Office Join a global tech leader where innovation, high performance, and career growth are at the heart of everything they do. This is your chance to make a real impact as a Software Developer, working on mission-critical systems in a cutting-edge environment. This is great opportunity to join a global business, benefiting from corporate benefits, continuous professional development and an opportunity to work on large programmes of work in public and private sectors. Skills Required: • Solid experience developing ASP.NET web applications in C# using Visual Studio/Visual Studio Code, • Experience creating RESTful APIs and ensuring API extensibility, • Cloud experience (Azure, AWS), • Azure DevOps, • Experience of unit and automated testing using tools such as NUnit, Jasmine and Selenium, • Containers (docker, K8s), • Security best practice (OWASP top ten), • OpenIDConnect/Identity server, • Micro service architecture, • MS SQL Server, • Azure DevOps, TeamCity

Solving real problems with PL/SQL precision and designing ETL processes that unlock the true value of enterprise date.Work on complex data challenges, modern tooling, and create meaningful technical impact.Oracle Software Engineer Circa £38k + Up to 15% bonusTwice a month in the Southampton area based officeThe Role You'll join a cross-functional product team that thrives on pace, collaboration, and innovation. Every day, you'll help shape the data foundations that keep our products and services running seamlessly for thousands of users.You'll design and develop clean, efficient, and fully tested PL/SQL code, contributing your expertise to build reliable features that teams rely on.Working with our established data structures, you'll turn complex requirements into robust, performant database solutions.As a key participant in our sprint cycle, you'll embrace agile ways of working, bringing transparency, adaptability, and continuous improvement to everything you do.This role would suitSomeone with commercial PL/SQL experience using ANSI syntax and a strong approach to unit testing.Experience with ETL processes, to handle data with confidence, turning it into reports and transformations that power the business.Experience with tools and frameworks like Bitbucket, JSON, REST, Confluence, Jira, TOAD, and ScrumAnd with skills in Python, Azure DevOps, APIs, or other databases,Current tech stack includes: • Oracle, PL/SQL, ETL, Toad,, • Git, Jira, BitBucket, Agile,, • UT PL/SQL (Unit testing framework),, • Azure DevOps, API first,, • MongoDB, PostGres, Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

Test Engineer - Salary £43,918 to £51,238 (dependent on experience) HQ SouthamptonPermanent Our growing Technology team plays a key role in ensuring OS is at the forefront of geospatial capability and is looking for people to join them. Its mission is to work across the business to provide customer centric design and technology services. Join us and you will have an opportunity to make an impact. To empower projects that deliver real-world benefits across Britain and internationally. To hear our customers say they could not have done it without us. And to be central to OS's vision: to be recognised as world leaders in geospatial services; creating location insight for positive impact. Join our Dynamic Technology Team This role will be based within an agile team responsible for the continuous development of cloud-based web applications within the OS Web Estate and supporting back-end infrastructure including API microservices, logging & reporting platforms, and data publication. Ordnance Survey has a testing community of 70+ test professionals that support each other with regular sessions on test related topics, tools, and techniques - be a part of it! About the role * Extend automated tests using our existing frameworks, and get involved in the creation of new frameworks where required * Focus on both front-end and API testing to ensure seamless user experience and functionality * Contribute your testing expertise into agile team ceremonies such as sprint planning, retrospectives, and daily standups * Clearly communicate software risks & test outcomes with the team, team lead, project manager & test lead * Provide expertise with performance testing of our systems * Support the Ordnance Survey Testing Community, with common standards such as metrics and use of test tools * Employment in this role is conditional upon eligibility for, and approval of, SC level security clearance Here is a snapshot of the technologies that we use * Java, Selenium, Cucumber BDD, RESTAssured, BrowserStack, Bruno, PostgreSQL, Microsoft Azure, Azure DevOps (sprint backlogs, pipelines, test plans), GIT, YAML, JSON, Snyk/Probely, JMeter What we're looking for * Highly skilled in creating, maintaining and peer reviewing test automation code in Java * Previous working experience supporting, contributing to and enhancing Java-based Selenium test frameworks * Strong API test automation skills utilising Bruno and Java RESTAssured * Experience with BDD (Behaviour-Driven Development) software development methodology * Excellent knowledge and skills in software testing & industry best practices * Working experience with Agile Scrum, collaborating with the team for backlog refinement and ability to estimate testing activities for sprint planning * Knowledge of CI/CD practices, and how they relate to test * Proficiency with non-functional testing, such as performance & accessibility * Experienced with the management of defects, identifying, debugging, and working with the team to resolve them The Rewards We want you to love what you do. That is why our benefits package rewards a job well done. * Salary - £43,918 to £51,238 (dependent on experience) * Performance related bonus up to 10% * A competitive pension scheme (OS contributes up to 12.07%) * 28 days annual leave in addition to bank holidays on joining additional to bank holidays (3 taking over Christmas) * Paid maternity, paternity and shared parental leave * Free subscription to OS Maps * Access to online learning platforms * Coaching and Mentoring schemes * Plus, a suite of excellent additional perks and benefits At OS, we believe looking after your health and wellbeing means more than posters and events. We empower you to manage your work and life the way you need it by offering things like * An extra days' leave for each year you work, up to 33 days * Employee Assistance Programme * Hybrid working * Free onsite parking at our modern HQ in Southampton * We adopt flexible working and can consider different working hours dependent on the role and your personal circumstances * Eyecare Vouchers * OS Explorers Nursery discount * Cycle to Work scheme Location We embrace a hybrid working model at OS. We have a fantastic HQ in Southampton, Hampshire where you will be required to split your time evenly - 50% in HQ and 50% working remotely. Additional security vetting is required for this role and must be completed prior to your start date. This role requires the successful candidate to have the right to work in the UK at the time of application. Unfortunately, OS is not able to provide visa sponsorship for this position Closing date:22 March 2026 23:59pm

A growing UK software business is looking for a Cloud Engineer to help design, build and run secure, resilient cloud infrastructure across AWS and Azure. You'll play a key role in modernising platforms, migrating legacy services, and improving automation, observability and security across a multi-cloud estate.Cloud Engineer (AWS & Azure)Hybrid (2 days per month onsite)Location: Southampton What you'll be doing • Designing, deploying and operating production cloud services across AWS & Azure (networking, storage, compute, app services)., • Building secure, resilient, observable infrastructure and services (monitoring, logging, tracing)., • Delivering cloud migration workstreams from traditional / on-prem environments into scalable cloud platforms., • Automating infrastructure and deployments using IaC and CI/CD, with a strong focus on repeatability and reliability., • Strong, hands-on experience with AWS & Azure in production environments., • Proven experience delivering cloud migrations (planning, build, cutover, optimisation)., • Good understanding of security and operational best practice (identity, access, hardening, monitoring, incident readiness)., • Comfort with automation and CI/CD (pipelines, deployment tooling, scripting)., • AWS: EC2, ECS, S3, RDS, VPC, Lambda, IAM, • Azure: Azure SQL, Entra ID, Azure DevOps, Container Apps, API Management, Functions, • IaC / Automation: Terraform / OpenTofu / Scalr, Octopus Deploy (or similar), Azure DevOps, PowerShell, Azure CLI, • Scripting: PowerShell, Python, Bash, • Containers: Docker, container registries (e.g., ACR), • CI/CD: Azure DevOps Pipelines, YAML automation, • Up to 15% Bonus scheme, • 25 days annual leave + bank holidays, • Pension: 4% employer contribution when you contribute 5%, • Free onsite gym, • EV car scheme, • Healthcare scheme (incl. dental/eye care/treatments/diagnostics consultations), • Death in service (3x salary), • Employee Assistance Programme (24/7 counselling + legal/financial support + GP line) Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

GraphQL Federation) to design, build and scale.This is an ideal contract for a GraphQL specialist who loves clean schemas, resilient services, and production-grade delivery.The Role (Key Responsibilities).Own end-to-end GraphQL API delivery.

A leading retail company in the UK is looking for passionate Salesforce Developers to join their team. In this role, as a Salesforce Service Cloud Developer, you will implement new features and work closely with analysts to enhance customer experience through innovative solutions.

Candidates should have strong experience in Agile methodologies, maritime logistics, and hands-on API testing.

Solving real problems with PL/SQL precision and designing ETL processes that unlock the true value of enterprise date. Work on complex data challenges, modern tooling, and create meaningful technical impact. Oracle Software Engineer Circa £38k + Up to 15% bonus Twice a month in the Southampton area based office The Role You'll join a cross-functional product team that thrives on pace, collaboration, and innovation. Every day, you'll help shape the data foundations that keep our products and services running seamlessly for thousands of users. You'll design and develop clean, efficient, and fully tested PL/SQL code, contributing your expertise to build reliable features that teams rely on. Working with our established data structures, you'll turn complex requirements into robust, performant database solutions. As a key participant in our sprint cycle, you'll embrace agile ways of working, bringing transparency, adaptability, and continuous improvement to everything you do. This role would suit Someone with commercial PL/SQL experience using ANSI syntax and a strong approach to unit testing. Experience with ETL processes, to handle data with confidence, turning it into reports and transformations that power the business. Experience with tools and frameworks like Bitbucket, JSON, REST, Confluence, Jira, TOAD, and Scrum And with skills in Python, Azure DevOps, APIs, or other databases, Current tech stack includes: Oracle, PL/SQL, ETL, Toad, Git, Jira, BitBucket, Agile, UT PL/SQL (Unit testing framework), Azure DevOps, API first, MongoDB, PostGres, Python This Oracle Software Engineer role is paying circa £38k with benefits including, 15% Bonus, 25 days holiday, enhanced pension, onsite gym, Car Scheme, healthcare scheme and more. Apply now or contact Chris Lynes at Spectrum IT for more information. Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy. TPBN1_UKTJ

Solid understanding of RESTful API design and exposure to GraphQL. Senior Java Developer (AWS, API) - Hybrid - Sussex. You will work across modern cloud-native architectures, contribute to API and microservices development, and help drive best practices across the engineering organisation.

System Analyst / Architect - API workflow. System Analyst / Architect - API & Workflow. You'll take ownership of workflow and API architecture, ensuring seamless integration, performance, and scalability across our platforms.

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

The ideal candidate will have extensive experience in payments, API design, and agile processes.

Una consultora tecnológica internacional con sede en Londres busca un Product Owner con más de 2 años de experiencia en ecommerce, manejo de productos API y un sólido conocimiento de metodologías Agile/Scrum.

A leading software company in Greater London seeks an experienced Account Executive.This role involves driving revenue growth by forming solid relationships with clients and managing digital transformation strategies using the MuleSoft AnyPoint Platform.The successful candidate will have a proven sa

Candidates should have a degree in Computer Science and strong skills in relational databases and APIs.

Conduct API demonstrations for partner teams. Assist partners in optimising the performance of Viator’s APIs for scalability and user experience. Solution Architect - Viator API Implementation.

A leading rewards and incentives platform in the UK is seeking an experienced Implementation Consultant to drive customer onboarding and support high-profile launches.In this role, you'll manage the onboarding process, ensuring exceptional service and aligning stakeholders.The ideal candidate has 2+

Define and drive the API roadmap, balancing the needs of enterprise clients, internal FDE teams, and AI/agentic consumers. Design APIs with AI consumption in mind: structured responses, semantic clarity, LLM function-calling compatibility, and agentic workflow support. OpenAPI, REST, GraphQL, Linear

A global leader in information and analytics is seeking a Software Engineer III in Greater London.This role involves implementing Scala/Spark pipelines and working with Java-based backend services for metric computation.The ideal candidate will have around 3 years of backend development experience,

API Developer page is loaded## API Developerlocations: United Kingdom - Greater London - London: United Kingdom - London - Remotetime type: Full timeposted on: Posted Todayjob requisition id: R3623Ameresco, Inc. Monitoring API performance, optimizing code, and scaling the API infrastructur

Responsibilities include developing new capabilities, designing APIs, and ensuring system scalability.

A technology solutions provider in the United Kingdom is seeking a Senior SDET responsible for ensuring high-quality software delivery.The ideal candidate will have robust experience in automation testing, particularly with C# and.NET, and will lead the automation strategy.Duties include writing var

Senior Backend Engineer / Developer (TypeScript Node API) London / WFH to £100k. You have experience of building event‑driven systems and public APIs.

A tech integration company is seeking an expert to integrate the Workday API with another system for data synchronization. The ideal candidate has strong experience with Workday API and proven success in system integration.

The role includes designing scalable REST APIs and databases while fostering a collaborative environment.

A leading government services provider is seeking a Technical Architect for a 6-month remote contract.The role involves designing and delivering architectural solutions for the Intelligent Navigation core platform and ensuring these solutions are scalable and secure.The ideal candidate will be self-

In this role, you will be responsible for implementing a high-performance API for cross-border transactions, using an advanced tech stack including Java, AWS, and Docker.

A leading digital recruitment firm in the UK is seeking a Digital Recruitment Specialist for a 6-month contract offering £400 to £425 per day.This fully remote position requires strong skills in Ruby, Selenium, and various testing methodologies for government digital services.The successful candid

Candidates should have experience in middleware technology and API management, with strong communication skills and fluency in French preferred.

The role involves creating clean web service APIs primarily in Python while collaborating with a global team. Candidates should have a strong background in public-facing APIs and infrastructure, preferably with a degree in Computer Science or a related field.

A cloud services company in Greater London is seeking a Senior Software Developer in Test to enhance automation frameworks for scalable services.The ideal candidate will have at least 8 years of software testing experience and 5 years in test development with strong Java skills.Responsibilities incl

A leading IT services company is seeking an Enterprise Integration Architect to play a crucial role in their transformation journey.The successful candidate will lead the development of an integration strategy, ensuring effective connections across systems.Responsibilities include defining integrati

This role involves developing integration patterns, overseeing API ecosystems, and maintaining event-driven architectures.

A leading UK bank in Greater London is seeking a Senior Engineer for Platform Engineering (APIs). In this role, you will lead and evolve the bank's API ecosystem using Kubernetes and integrate core services across various cloud platforms. You should have strong skills in API gateways, microservice e

The role involves deploying and managing applications in GCP, designing RESTful APIs, and implementing automated testing strategies.

A leading financial services company is seeking a Senior Business Analyst to drive the success of digital product initiatives.You will capture and prioritize requirements, act as a liaison between teams, and ensure effective project delivery.The ideal candidate will have over 5 years of experience i

A leading financial services company is seeking a Senior Software Development Engineer to design and maintain innovative internal software products.The role emphasizes collaboration across teams to ensure high-quality solutions while mentoring engineers.Ideal candidates will possess robust programmi

A leading trading firm is seeking a Staff API Trading Engineer to design and build high-performance trading APIs. The ideal candidate has proven API experience, a strong background in OpenAPI, and familiarity with Rust or similar languages.

The role involves designing and implementing integrations along with a focus on API development.

Excellent command of REST APIs — including design, calls, authentication, and debugging — and proficiency with related tools such as Postman, Swagger, cURL, etc. API Integration Senior Specialist. Junior technical project management role or API integration role with the ambition to work in a cli

The role involves developing new product features, participating in system design, building APIs, and providing support for bug fixes.

A leading utility provider in Greater London is seeking a Software Engineer to join their Telco Experience Team.You will design and implement backend systems using Go, while collaborating with various stakeholders to deliver customer-focused features.This role emphasizes teamwork and effective commu

A leading payment solutions company in the UK is looking for a Product Director to build and lead a high-performing team responsible for delivering innovative payment products.This full-time role requires developing strategies in collaboration with senior leadership, ensuring effective product launc

In this role, you will build and maintain testing frameworks for Oracle-based products, focusing on high-quality deliverables and rapid feedback across CI/CD pipelines.

Ideal candidates will have experience with APIs, event-driven architectures, and a good understanding of enterprise integration patterns.