python backend developer jobs in City of London

Python Developer | Python & FastAPI | Founding Engineer in High-Growth AI Venture Studio Contract | £400/day | Outside IR35 You’ll step in as a Founding Engineer within an early-stage AI venture studio that builds and launches creator-led B2C software businesses at speed. This is a backend-leaning role (circa 80% backend) where you will own core systems end to end, shaping APIs, designing data...

Java Back-End Developer (Azure / AWS) – Contract | London (Hybrid) Contract: 12+ months Location: London (Hybrid – 3 days onsite) We are supporting a consultancy delivering enterprise-scale technology programmes for a major client. They are seeking an experienced Java Back-End Developer with strong cloud (Azure/AWS) expertise to join a long-term engagement working on modern, microservices-based...

Senior Software Engineer Location: London (x3 days a week onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As a Senior Java Engineer for an loyalty program team, you will have the...

I am partnering with an early-stage UK tech startup focused on using data and AI to optimise and accelerate the design of clinical trails. Senior Back-End Engineer – Founding Team (London, Full-Time) Role: Senior Back-End Engineer – Founding Team Location: London, UK (on-site/hybrid) Type: Full-time, Senior Level I am seeking a highly experienced Senior Back-End Engineer to join a fast-growing,...

Affinity Labs: Founding Engineer (Backend) At Affinity Labs, we’re building the future of company creation, a full-stack AI venture studio that partners with content creators to co-found authentic, scalable software businesses. By combining AI-native development with creator-led distribution, we're pioneering a new model of monetisation by to rapidly build, launch, and scale digital ventures...

Founding Engineer | Seed-stage AI SaaS (£100k + equity) We’re hiring for a seed-stage SaaS startup backed by Balderton (near £5m raised) that’s using AI to fundamentally redefine its product. The company is pre-PMF and mid-pivot , at a genuine inflection point, and looking for a hands-on engineer (~80% coding) to help shape the product, architecture, and technical foundations from the ground up....

Job Description Senior Software Engineer (Python) £85,000 - £100,000 Office Location: Central London (Hybrid) A global, high-growth Fintech firm is seeking a Senior Software Engineer to join its engineering team in Madrid. This organisation has expanded to over 600+ globally. This is an opportunity to take ownership of a mission-critical platform, building the financial infrastructure that...

Job Description A Python Backend Engineer is needed to join growing software house in London who specialise in helping businesses reduce wasteful processes, costs and energy; and improve their ROI. sustainability meets profitability. Our client aims to change how corporate finance works, by replacing static, limited and often stale financial metrics with live data-driven insights sourced from...

This is a remote position. A fantastic opportunity for a Senior Python Developer to join a UK-based technology organisation working on large-scale, cloud-native platforms within the education sector. Having grown their engineering capability, they are now looking to bring in a hands-on Team Lead who can set technical standards, mentor developers, and play a key role in shaping the future of...

Python/Golang/Rust Developer - Digital Assets arm of Global Fund - Up to £200k base + Bonus One of the leading absolute return/hedge fund managers within finance, currently managing over $40bn, is diversifying further by creating a separate division to focus on managing crypto and digital asset strategies. Meaning these guys offer the dynamism and entrepreneurial spirit of a small firm, with...

About Circuit Mind Electronic circuit boards are at the core of current and future inventions - space travel, medical robotics, autonomous transportation, augmented reality, bio-engineering. Yet today designing an electronic circuit board is an extremely manual, long and tedious process. At Circuit Mind we believe that this is wrong and we are on a mission to fix it, triggering the future of...

GreetingsWe are Hiring Python Developer / Oracle Programmer Position in London, UK Candidate has to be in the office for 3 days/ week in London office Want to apply Read all the information about this position below, then hit the apply button.Permanent Employment /Fixed Term EmploymentDescription We are seeking a Python Developer / Oracle Programmer to develop in-house...

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first click apply for full job details

Job Description You’ll join a team dedicated to pushing the boundaries of what’s possible in the trading world, using innovation to drive real results. Python API Engineer – London What you will do - Maintain and develop SaaS products offering, pioneering innovative approaches to achieve the company's vision. For example, integrating cutting-edge AI models or developing new analytical...

Senior Software Engineer (Python)£85,000 - £100,000 Office Location: Central London (Hybrid) A global, high-growth Fintech firm is seeking a Senior Software Engineer to join its engineering team in Madrid. This is an opportunity to take ownership of a mission-critical platform, building the financial infrastructure that empowers businesses internationally. Backend Engineering: Extensive...

A Python Backend Engineer is needed to join growing software house in London who specialise in helping businesses reduce wasteful processes, costs and energy; and improve their ROI. sustainability meets profitability. Our client aims to change how corporate finance works, by replacing static, limited and often stale financial metrics with live data-driven insights sourced from direct connections...

Job Description Core Developer (Python) - Algo Trading Firm - London - Up to £350k+ TC (DOE) One of London's most impressive Algo Trading firms is looking for Engineering Wizards to join their team in London. Having arguably one of the best technology teams in the world, the firm is in a stage of hypergrowth, looking to deliver on its ambitious plans to be a leading liquidity provider in the...

Job Description Senior Backend Developer – Node.js, TypeScript, Kafka - up to £70k Leading E-commerce Brand | Up to £70,000 | Hybrid (2 days/week in London) We’re partnering with a leading e-commerce business that’s scaling a modern, event-driven platform to support high transaction volumes and continued growth. They’re looking for a Senior Backend Developer to join a highly capable...

Job Description Lead Backend Developer – Node.js, TypeScript, Kafka - up to £80k Leading E-commerce Brand | Up to £80,000 | Hybrid (2 days/week in London) A leading e-commerce client is looking for a Lead Backend Developer to help shape the technical direction of a highly scalable, event-driven platform. This role combines hands-on development with technical leadership, working in a Node.js,...

Senior Backend Developer – Node.js, TypeScript, Kafka - up to £70k Leading E-commerce Brand | Up to £70,000 | Hybrid (2 days/week in London) They’re looking for a Senior Backend Developer to join a highly capable engineering team working with Node.js, TypeScript and Kafka. This is a hands-on role where you’ll be building and evolving distributed backend services in a fast-paced, product-focused...