301 to 325 of 356 Full-Stack Development Jobs in London

Market rate (Inside IR35) Role Purpose This role is responsible for developing industrialised optimisation and machine learning models as part of a full-stack product squad delivering operations decision-support software. ***Please note - The ideal candidate MUST HAVE strong experience with Optimisation*** Scope … building industrialised data-science software products, including: Business problem understanding Analysis and visualisation Prototyping ML and optimisation models in Python Production-grade software development Data pipelines and orchestration CI/CD, testing, logging, and robustness Stakeholder engagement and roadmap contribution Agile ways of working Core Traits Systems thinking ...

Founding Engineer – Full-Stack/AI/Early-Stage Startup Location: London (Hybrid 3 days onsite) Employment Type: Permanent Salary: Competitive (DOE) A fast-growing early-stage technology startup is building AI-driven products that power data-heavy workflows across digital platforms. The team operates with … powered tools to real-world workflows. Thrives with autonomy and responsibility. Bonus Experience Exposure to AWS serverless or event-driven architectures. Mobile development experience (e.g., Flutter). Benefits Flexible hybrid working model Generous Equity High ownership and autonomy Opportunity to influence architecture and product direction Fast learning environment ...

integrating, and maintaining RESTful endpoints Support database design and optimisation (e.g. PostgreSQL, MongoDB) Collaborate with front-end and product teams to deliver full-stack features Write clean, testable, and maintainable code Help improve system performance, scalability, and security Participate in code reviews and learn from senior … like DevOps, testing, or AI tooling What we're looking for: 1–2 years of experience (including internships or personal projects) in backend development Proficiency in at least one backend language (Node.js, Python, Go, etc.) Basic understanding of how REST APIs work Familiarity with databases and version control ...

trade-surveillance modules, transaction-monitoring systems, document repositories, and ID-verification capabilities Drive best practices across code quality, architecture, observability, and secure software development Ensure systems meet regulatory requirements relating to data handling, retention, reporting, and operational resilience Coordinate delivery across multiple concurrent projects, maintaining clear communication with … services, trading, fintech, or another high-complexity environment Demonstrated ability to architect and scale distributed systems, client-serving APIs, or multi-component full-stack platforms Strong technical judgment and the ability to translate ambiguous requirements into clear design decisions Hands-on experience working with web technologies ...

Fullstack Developer Start Date: ASAP Role Duration: 1 year Location: remote with occasional travel to Croydon Inside IR35 - Umbrella only Active SC clearance required, eligible candidates will be considered Required Skills: Java Kafka Nice to ...

Fullstack Developer Start Date: ASAP Role Duration: 1 year Location: remote with occasional travel to Croydon Inside IR35 - Umbrella only Active SC clearance required, eligible candidates will be considered Required Skills: Java Kafka Nice to ...

front-office trading platform used directly by traders and quants. These roles are best suited for candidates with experience in full stack development using React and Python and particularly those who have built trading platforms from the ground up. Candidates who wish to apply … development of front office trading systems and must be comfortable facing to the traders and quants. Required skills: Full stack development experience using React + Python React: AG Grid, Charting, WebSockets and data visualisation Python: Core Python experience around multi-processing ...

Full Stack Developer X2 (Mid-Level React.js, Node.js) Product Development (Remote, UK-based) £50k - £60k Full Stack Software Developer required to join our clients growing Product Development team. This is a unique opportunity to work remotely ...

Senior Full Stack Engineer/Developer (TypeScript React Data) Remote UK to £90k Are you a data savvy Full Stack Engineer? You could be progressing your career ...

Full Stack Engineer/Developer (TypeScript React Python) London/WFH to £120k Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your ...

Senior Software Engineer (AI Focus) - £80,000-£140,000 + Benefits + Shares + Bonus London, Edinburgh, or Manchester Hybrid (Up to 3 Days Onsite per Week, usually less) Join one of the UK's ...

I'm working with a systematic hedge fund in London, who have large technical teams underpinning desks of quants and traders, as they trade in a computer driven yet collaborative manner. The codebase is in ...

Company We are working with a tier-one energy trading company who are dedicated to accelerating the transition to greener energy. They pride themselves on cultivating an innovative and collaborative environment. Role Looking for a ...

Full-Stack Developer Start Date: ASAP Role Duration: 1 year £500/day inside IR-35 Location: Remote with occasional travel to Croydon We are seeking an experienced Backend Developer to join a key public sector programme focused on delivering secure, high-performance systems that support ...

highly experienced Senior Python Developer/Dev Team Lead with a strong hands-on technical background. This role requires deep expertise in Python development, including experience with modern frameworks, emerging trends, and scalable system design. While the position carries senior-level responsibility and involves supporting and guiding … development team, the primary focus is on hands-on Python engineering rather than pure people management. Role overview British Council are looking for a Technical lead/Lead engineer - they need to have hands-on technical experience. They will not be leading a team to begin with however ...

Founding Full-Stack Engineer to join a pre-SEED FinTech B2C product London (4 days in office in Shoreditch, London) Up to £120k + meaningful equity No VISA Sponsorship The Company An early-stage, consumer fintech startup building a new kind of personal finance platform. Backed … What We’re Looking For Senior-level Product Engineer (ideally 6+ years experience), building with Go or other backend-focused languages A full-stack background (Typescript, React), with solid architectural fundamentals Experience handling large or complex datasets at scale, and thoughtful about data sensitivity, privacy ...

than hierarchy. What You'll Be Doing Building and shipping core product features using Python and TypeScript Designing and owning backend-leaning full-stack systems Working with LLMs and AI-driven workflows in production Building event-driven systems and third-party integrations Taking ownership from problem … modern cloud platforms (experience here is a plus, not a blocker) What We're Looking For 5-10+ years' experience in full-stack software engineering (backend-leaning) Proven experience shipping AI-powered products end-to-end Early-stage startup experience strongly preferred Comfortable working directly ...

Develop and ship production-ready AI algorithms, building on and improving the company's proprietary approaches to significantly increase output quality. Lead the development of new and improved algorithms to push the limits of what is possible with large language models. Research, prototype and implement state … Design and build a state-of-the-art evaluation pipeline to objectively measure output quality and guide R&D direction. Contribute to frontend development (TypeScript/React) to integrate AI capabilities directly into user-facing workflows. Build and maintain backend services and APIs, working with Postgres databases ...

Imandra, we build tools for reasoning about algorithms. Our technology forms an integral part of our customers' software development lifecycles, from the design stage to analytics and monitoring of critical production systems. Imandra strives to recruit, develop, and retain the most talented people worldwide, regardless of their background. … time zones. Our primary locations are Austin, TX and London, UK. Requirements What you will bring What we're looking for Strong software development skills. A product-focused mindset, with a willingness to design, develop and deliver features and improvements across the full software stack. ...

currently working with a London-based investment bank who are actively seeking a Senior fullstack Java Developer to work on the development of a business-critical application within the FX space. What you'll need to succeed: Extensive fullstack Java and React experience within financial services - Mandatory. Strong … front-office/eTrading application development experience. Good experience with Solace and FIX. Good understanding of FX. What you'll get in return: Up to £600pd outside IR35. Initial 6-month contract with extensions. London-based hybrid working. What you need to do now : If you're interested ...

Automation Test Engineer • Rate to approx. £500/day (direct contract with the client) for 6 weeks • Remote working Overview This company is a Workflow & AI Orchestration Specialist. They're on a mission to modernise ...

Founding FullStack Engineer (VueJS/React, TypeScript,Python, FastAPI) Salary up to £95,000 +Equity London - 3 days a week Early stage MedTech Startup, building tools that help design better, fairer, and more effective clinical ...

Java Full Stack Engineer Location: UK (Hybrid, with flexibility for client site travel) Type: Permanent Clearance: Eligible for UK security clearance Join a leading global consultancy driving digital transformation across industries ...

Full Stack Developer (80% React/20% Java) Location: Fully Remote (UK Based) Rate: £525 per day (Inside IR35) Clearance: Active SC Clearance (Essential) Contract Length: Initial 6 months We are ...

Full Stack Developer £Up to £80,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Client: Join a high-growth technology and AI consultancy recognised for delivering ...