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Multi-Agent LLM Systems Remote (MUST BE IN EUROPE) We’re partnering with a venture-backed startup led by a founder who has built and taken two technology companies to IPO, now assembling a world-class team to tackle one of the most impactful problems in applied AI. The company is developing a voice-enabled AI copilot used by professionals to eliminate the friction from documentation and decision-making, a product with genuine, real-world impact that’s already being used in production environments. They’re now looking for a Senior/Staff AI Engineer to own and evolve the core “brain” service behind this assistant, the system that powers reasoning, retrieval, and dialogue in real time. Interview Process: 1️⃣ Intro call where we talk about the role. 2️⃣ Technical discussion with the Head of AI. 3️⃣ Deep-dive session with a Backend Engineer and ML Engineer from the team. 4️⃣ 30-minute conversation with the Founder. Why This Is Worth Your Time • Real ownership: You’ll be the architect behind a core AI system, not a feature contributor., • Fast-moving environment, • Immediate impact: Your code will run in production and support real users from day one., • Technical depth: Multi-agent reasoning, voice-streaming, RAG optimisation and all in one system., • Flexible setup: Remote across the EU, with optional co-working in London or Barcelona. What you’ll do • Obsessive about latency, you think in milliseconds, optimise for concurrency, and understand the trade-offs between speed, cost, and model performance., • Design, implement, and productionise multi-agent LLM systems that reason, plan, and coordinate., • Develop FastAPI-based microservices optimised for low latency and high reliability., • Engineer and evaluate RAG pipelines: hybrid retrieval, re-ranking, grounding, and context validation., • Integrate real-time voice interfaces (STT/TTS, WebRTC, LiveKit) into intelligent conversational flows., • Instrument and evaluate system performance using observability and model-faithfulness metrics. What we’re looking for • Proven ability to build and ship agentic or multi-agent frameworks into production., • Expert Python, FastAPI, and asyncio developer., • Practical experience with LangChain, Autogen, or custom orchestration layers., • Startup mindset: ownership, speed, and pragmatism over perfection. Bonus points • Experience working with voice or streaming systems (STT/TTS, WebRTC, LiveKit)., • Exposure to evaluation tooling, LLM-as-judge setups, or agent benchmarking., • Background in healthtech, fintech, or other compliance-heavy sectors.

Lead Data Scientist (remote) Search, Ranking, Retrieval and LLM Modelling Early Stage AI Company We are working with a fast growing early stage company that is building a new intelligence layer for the next era of product discovery. With AI assistants becoming the first place consumers turn to for information and recommendations, brands need to understand how these systems interpret products, surface them and prioritise them across different conversational and search environments. This is exactly what this company solves. They already partner with global consumer brands and now want to hire a Lead Data Scientist to architect and own the modelling engine that powers the platform. This is a hands-on role with serious technical ownership. You will design and build the systems that identify the signals that matter most for visibility, the retrieval and embedding architecture that feeds the models, the ranking and scoring framework that prioritises actions and the evaluation layer that measures how different LLMs behave across queries, surfaces and contexts. You will work across ranking signals, vector and semantic representations, entity understanding, graph-based relationships, model serving, observability, cost and latency optimisation, and the connection between unstructured signals and automated recommendations. You will also help shape the long-term ML strategy, including platform design, experimentation frameworks and the future of the discovery engine. This role suits someone who has experience in search, ranking, retrieval or recommendation systems at scale and who enjoys building practical production models rather than working in isolation. You will work closely with the founder and have real influence over the direction of the product and the future of the intelligence stack. The package is strong and comes with a competitive base plus bonus and meaningful early-stage equity with genuine upside. If you are interested in joining a company at a stage where your work will directly shape the product, the system and the category, we would like to speak with you.

About MosaiQ MosaiQ is a fast-growing AI company transforming how professional-services firms operate. We work with consulting teams, private equity funds, investment advisors, and other knowledge-driven organisations to turn their expertise, judgment, and workflows into AI-powered systems — deployed in days, not months. This is not “AI tooling for demos.” This is production AI embedded into real decision-making and revenue-critical workflows. Our Uniqueness • We reverse-engineer real work, not abstract use cases, • We map tacit knowledge and judgment, not just data, • We build hybrid AI + human systems that actually get used, • We augment experts rather than replace them, • We deploy custom AI directly into business processes, with measurable impact, • We work hands-on with decision-makers who value speed, quality, and judgment The Role We are looking for a Senior Full-Stack / AI Engineer to work closely with the founding team and the core team to design, build, and deploy real AI systems for demanding professional-services clients. You will not be handed toy problems or isolated tickets. You need to be a system thinker and ready to tackle complex problems. You will help turn messy, high-stakes workflows into robust AI-powered products, from architecture to deployment. Your work will directly shape MosaiQ’s platform, its AI modules, and how clients experience AI in practice. Your Responsibilities AI Systems & Product Engineering • Design and build AI-powered workflows end-to-end (backend, frontend, orchestration), • Implement and iterate on AI modules (LLMs, agents, retrieval, evaluation loops), • Translate real business processes into reliable, testable systems, • Balance speed, robustness, and long-term maintainabilityFull-Stack Development, • Build and evolve product interfaces used by real clients, • Develop APIs, services, and data pipelines supporting AI workflows, • Own features from concept → implementation → deployment, • Contribute to platform architecture and core componentsAI Implementation & Quality, • Design prompts, system instructions, and evaluation criteria, • Implement human-in-the-loop workflows where judgment matters, • Debug failure modes, hallucinations, and edge cases, • Improve reliability, consistency, and explainability of outputsCollaboration & Product Thinking, • Work directly with the founder on product direction and trade-offs, • Sit close to client problems to understand real constraints, • Help shape what becomes reusable platform capability vs. bespoke logic, • Document patterns, learnings, and internal building blocks Who You Are You’ll thrive here if you: • Are a senior builder, comfortable owning systems end-to-end, • Enjoy understanding how businesses actually work, not just code in isolation, • Think in systems, workflows, and failure modes, • Write production-grade code, • Use AI tools daily to accelerate your own work, • Understand trade-offs between speed, correctness, and scalability Core skills • Have built AI products beyond demos or notebooks, • Have experience with:, • LLM orchestration / agents, • RAG systems and knowledge layers, • Evaluation frameworks for AI outputs, • Have used tools such as:, • LangChain / LangGraph / similar, • Claude / OpenAI APIs in production, • Vector databases, embeddings, structured retrieval, • Have worked in consulting, finance, legal, or other knowledge-heavy environments, • Can turn ambiguous, real-world problems into clean technical designs Mindset That Matters • Builder mentality — you ship, iterate, and improve, • Bias to action — progress today beats perfect next quarter, • Ownership — you take responsibility for outcomes, not just tasks, • Product thinking — you care how systems are used, not just how they’re built What You Gain • Direct exposure to real client problems and high-stakes use cases, • The chance to build serious AI systems, not slideware, • Deep experience turning expert workflows into AI-powered products, • A central role in shaping MosaiQ’s technical and product foundations, • The opportunity to grow into a core technical leader as the company scales

Title: Co-Founder / Fractional Chief Technology Officer Location: Remote (UK / EU only) Salary: Equity only (to start) - with vesting period Platform: AI-Native Talent Intelligence Platform Stage: Early product (working demo MVP) with live AWS infrastructure and AI workflows in place The Role We are recruiting for our sister business 'hdhnt', this is an AI-native Talent Acquisition platform designed around deep candidate analysis, structured evaluation, and intelligent matching. Our mission is to build a tool which allows hiring companies to successfully source candidates directly, and alleviate the need for external recruitment agencies. The technical foundations already exist: cloud infrastructure, LLM pipelines, scoring logic, and multi-tenant architecture, these have been built through use of contractors to date. We are looking for a hands-on Technical Co-Founder / CTO to take full ownership of the platform’s technical direction, architecture, and execution as we scale from early product to category-defining system. Core Responsibilities • Own the end-to-end technical architecture across backend, AI systems, data, and infrastructure, • Lead development of AI-driven scoring, ranking, and decision systems, • Design and evolve advanced search and retrieval systems beyond keyword matching, • Build and scale API-first, multi-tenant backend services, • Lead development of video, voice, and interview analysis tooling within the platform, • Drive the transition from third-party LLM usage toward custom and fine-tuned models, • Ensure platform security, data protection, and GDPR-aligned system design, • Establish engineering standards, CI/CD workflows, and operational best practices, • Act as technical counterpart to product, commercial, and investor conversations, • Manage technical / dev responsibility for any contractor arrangements in place. Technical Requirements Backend & APIs • Strong experience designing REST and/or GraphQL APIs for production SaaS platforms, • Advanced proficiency in Python (FastAPI) and/or Node.js (TypeScript / NestJS), • Deep understanding of multi-tenant system design, permissions, and role-based workflows, • Event-driven architectures using webhooks, queues, and async processing AI, Search & Data Systems • Hands-on experience integrating LLM APIs (OpenAI-compatible or equivalent), • Design and implementation of scoring, ranking, and weighted evaluation systems, • Experience with vector search, embeddings, and semantic retrieval, • Practical use of RAG architectures, prompt pipelines, and structured outputs, • Strong understanding of model evaluation, explainability, and output validation Model Development • Experience with fine-tuning or training models (open-source or proprietary), • Understanding of model lifecycle management, data pipelines, and inference optimisation, • Familiarity with moving from API-based LLMs to self-hosted or private models Video, Voice & Media Processing • Experience working with video, audio, or real-time communication systems, • Familiarity with speech-to-text, audio processing, or conversational AI pipelines, • Comfort designing systems that support AI analysis of recorded interactions Cloud & Infrastructure • Strong experience with AWS-based SaaS platforms, including:, • ECS Fargate, • Application Load Balancers, • IAM, KMS, Secrets Manager, • CloudWatch logging and alerting, • Infrastructure-as-Code using Terraform, • Secure, scalable deployment and environment management, • CI/CD pipelines, automated testing, and release workflows Experience & Profile • Senior-level engineer or technical founder with end-to-end ownership experience, • Proven track record building or scaling production SaaS platforms, • Comfortable operating across architecture, hands-on coding, and strategic decisions, • Strong product intuition with an ability to translate abstract requirements into systems, • Experience working in early-stage or high-ownership environments, • Clear communicator capable of partnering closely with a non-technical founder Nice to Have • Prior experience as a founder, early CTO, or lead architect, • Background in search, recommendation systems, or decision engines, • Experience with regulated or sensitive data environments, • Familiarity with recruitment, HR tech, or workflow-driven SaaS platforms, • Experience building internal admin tools and operational dashboards There will be a multi-stage interview process including theoretical case study and technical assessment. If you would like to find out more, please apply below. We encourage candidates from all backgrounds to apply, regardless of; race, gender identity, sexual orientation, religious beliefs, age or other experiences.

Immersive, a cybersecurity company based in Bristol, has announced the appointment of Mark Schmitz as its new Chief Executive Officer. Cyber firm Immersive appoints new Chief Executive Officer. James Hadley, the founder of Immersive, will now serve as Chief Innovation Officer while remaining on the

Candidates will receive tailored coaching from successful founders to enhance personal development and business acumen.

Cyber firm Immersive appoints new Chief Executive Officer. Immersive, a cybersecurity company based in Bristol, has announced the appointment of Mark Schmitz as its new Chief Executive Officer. James Hadley, the founder of Immersive, will now serve as Chief Innovation Officer while remaining on the

Grade 4 Domestic Service Electrician (Founder).Bristol, Bath, South Wales, Gloucester, Swindon.At MJP Electrical, we are deliberately selective.ANALYSISchecked? Actually that sentence: we think not needed.If you cut corners, dislike structure, or see compliance as a nuisance rather than a responsibi

For technical support or questions about Capital One's recruiting process, please send an email to Careers@capitalone. At Capital One, we're building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a missio

Supported by seasoned founders, you can receive salary while building your startup or opt for up to €500k in funding.

Hiring top notch talent supported through our network (over 50000 professionals). Support in reaching product-market-fit and building up a sales force / marketing machine. One of our fellows set a record for Europe's largest pre‑seed round by a first‑time founder securing a 12M pre‑seed invest

One of our fellows set a record for Europes largest pre-seed round by a first-time founder securing a 12M pre-seed investment. You will embark on an extensive personal development journey crafted by unicorn founders and follow a fully customised programme enhancing your goal time and energy manageme

A deep-tech startup in Greater London is looking for a Founder Associate with a chemistry background.

We are now looking for a Co-Founder who believes in this vision and is ready to build and scale the venture together, with both strategic involvement and investment. This is a Co-Founder role with equity.

A fintech company based in Paddington, London is seeking an experienced Executive Assistant to support its CEO and COO.This high-impact role requires a proactive individual who desires to engage in various initiatives beyond traditional executive support.Key responsibilities include managing diaries

Fast growing, founder-led, global technology company is looking for a Senior EA to come on board so support the CEO. Top tier EA experience supporting a founder/CEO or equivalent executive in a fast-scaling, global tech environment.

Uno studio di crescita con sede a Londra cerca un Chief Of Staff che lavori a stretto contatto con il Founder.

You’ll support an impressive, fast-moving Founder who values kindness, discretion and initiative, and needs a confident EA who can anticipate, adapt and stay one step ahead.

Managing Director – Insurance Broking (Founder-Level). A founder level opportunity for an entrepreneurial Managing Director to build and scale a new UK insurance brokerage from launch through to a potential seven figure exit.

A leading investment firm in Greater London is seeking a founder or founding team to develop a specialist data-centre platform. This role offers the opportunity to build a boutique service for institutional investors and global tech firms, alongside meaningful founder equity and strategic support fr

A forward-thinking energy company in the UK is seeking a Chief of Staff to enhance the CEO's influence in crucial areas.The role requires representing the company in regulatory meetings, fostering investor relationships, and developing compelling narratives for fundraising.The successful candidate w

A dynamic tech platform provider in Greater London is searching for an experienced Senior Product Manager to oversee product lifecycle from discovery to optimization.You will work closely with cross-functional teams to build scalable solutions that meet user needs and business goals.The ideal candid

A growing tech start-up in London is seeking an exceptional Executive Assistant to support the Founder.

You’ll work closely with a highly engaged founder and leadership team who are self-aware about what needs to change - and are actively looking for a People leader who will.

An early-stage high-impact AI startup in London is seeking a Co-Founder (CEO/CTO) to shape the company’s vision and lead product evolution.

A disruptive consulting firm in London seeks a proactive Administrative / Executive Assistant to support the founder.

A venture-backed AI insurtech startup is seeking a Founding CEO to lead the creation of an AI-native protocol for bridging large language models with regulated insurance markets.The ideal candidate will have experience scaling B2B infrastructure products, alongside a deep understanding of regulated

An innovative education company based in Greater London is seeking a Founder Apprentice to work directly with Vishen Lakhiani.

Proven experience as a founder or senior leader who has scaled B2B infrastructure products from zero to one.

Private / Business PA to Founder (Creative World).

This founder-level position offers significant autonomy, meaningful equity, and the chance to lead a business from launch to a potential seven-figure exit.

An early-stage technology start-up in Greater London is seeking a dynamic Executive Assistant (EA) to support their founding investor and operations team.This full-time role offers significant responsibilities, including managing complex diaries, arranging international travel, and providing operati

Join an ambitious startup as a Co-Founder to build and scale a platform connecting AI agents globally. Whether technical or growth-focused, you will shape the company’s vision from the ground up, lead capital-raising efforts, and drive product evolution in a high-pressure environment alongside a f

An innovative technology firm in London is looking for a Founder's Associate to join their team.

En tant qu'employé de notre société, vous.Venez travailler dans une société en pleine croissance qui vous offre de chouettes avantages, ainsi que des opportunités de progression et d'apprentissage aux côtés de leaders accomplis.Nous recherchons un membre de notre équipe expérimenté.Nous a

This is a full-time remote position for a Co-Founder and Social Media Wizard.

Equity only (co-founder level).

An eco-conscious garment care brand in the United Kingdom is seeking a Co-Founder and Social Media Wizard to lead their brand strategy and enhance their online presence.

A prestigious consulting firm is seeking a Private / Business PA to the Founder, responsible for complex diary and travel management.

A dynamic tech startup in London is seeking a Founder’s Associate / Product Manager dedicated to building innovative AI products from the ground up.

A pioneering gaming startup is seeking a creative and detail-oriented designer to help shape their unique ecosystem.This mid-senior level role involves designing intuitive digital interfaces, collaborating with diverse teams, and bringing innovative solutions to complex challenges.Candidates should

We are serial entrepreneurs for example Paul Müller (founder Adjust 1. B exit) and Petter Made (founder SumUp 8B) who are eager to support outlier personalities and serial entrepreneurs to build 1B companies. One of our fellows set a record for Europes largest pre‑seed round by a first‑time fou

A pre-launch AI startup is looking for a co-founder with deep experience in Machine Learning and Data Science. The role provides a unique opportunity to work alongside a high-profile co-founder with a proven track record.

A leading online directory platform in the UK is seeking a web developer to take on a technical co-founder role. This opportunity involves leading the development of an MVP, collaborating closely with the founder, and impacting the food and beverage sector.

A prestigious fashion brand in West London is searching for an experienced EA and Office Manager to support the Founder and Creative Director.

An innovative tech startup in the United Kingdom is seeking a Technical Co-Founder to lead its technological vision in AI-powered solutions for content automation. This role offers co-founder equity, remote flexibility, and the opportunity to shape the future of content marketing with cutting-edge t

Technical Co-Founder / CTO – Health-Tech & Sports Performance. Co-founder-level equity and long-term ownership.

A dynamic food service app company based in London is seeking a co-founder to expand its UK operations.