python backend engineer jobs in City of London

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...

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...

You will work on a diverse range of challenges, from model-serving APIs and data pipelines to infrastructure for intelligent agents and automation frameworks.

You will collaborate closely with the CTO and engineering team to design, build, and scale production systems that integrate AI into real-world applications.

Job Description Our vision From blockbuster films and AAA games to immersive experiences, the demand for photo-real 3D content has never been higher - but creating photorealistic assets is slow, expensive, and manual with no current scalable solution available. At M-XR, our mission is to democratise the creation of high-quality 3D assets and empower brands, studios, and creators to build...

Job Description 🚀 Senior Full-Stack Engineer (Backend-Leaning) – SaaS + AI Join a seed-stage SaaS startup backed by leading VCs, adopting AI to redefine their product. They’re pre-PMF, mid-pivot, and need a hands-on engineer (~80% coding) to help build, define, and scale. 💰 Comp: Up to £100k + strong early stack equity package 🧑 💻 What you’ll do - Full-stack engineering, backend-leaning...

Job Description SENIOR PYTHON ENGINEER LONDON £65,000 - £85,000 You’re a problem-solver who thrives on complex data challenges and wants to see your work make a measurable impact? Here’s your chance to join. Work with real-world ML datasets, cutting-edge data systems, and a platform that processes billions of events — all while helping shape how global advertisers protect their ad spend. THE...

You will be liaising with these clients too, understanding their projects and building the solution collaboratively. It's a hybrid working environment, with some need to travel to client site. Starting salary will be up to £130,000 plus a range of benefits that are continuously improving as the company grows.

You will also collaborate with the Platform, Support and DevEx teams on the wider technical strategy, reporting to the Director of Engineering in an influential role.

You will push the frontier of foundation models for an under-explored, massively valuable domain. - Team: We are a small, collaborative, world-class research team based in central London. - Founding level equity + competitive salary: We want you to share in the upside of what we are building.

Our Mission Ferry is pioneering a new wave of Manufacturing Operations Platforms for the AI age. Our software powers some of the largest manufacturers globally, providing the tools, insights & capabilities for them to revolutionize what & how they produce. Apply now, read the job details by scrolling down Double check you have the necessary skills before sending an application. We are backed...

You will have 20 work from anywhere days added on top which you can use to make soime weeks 2 days a week from home.

You will be proud to show how you’ve impacted other parts of a business and delivered results

You will be pushing frameworks and languages for good business reasons

Backend Engineer (AI Platform) - London £80k–£100k + EMI equity Remember to check your CV before applying Also, ensure you read through all the requirements related to this role. About the Role We’re hiring a Backend Engineer to build the core infrastructure behind Revax’s AI-native platform for professional services. You’ll design, optimise, and scale the systems that power multi-agent...

Affinity Labs: Founding Engineer (Backend) If the following job requirements and experience match your skills, please ensure you apply promptly. Location: London Area, United Kingdom · On-site Company Description 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...

About the Team Dex is an AI-powered recruiter, matching exceptional software engineers with top tech companies. We're one of the fastest-growing UK startups, and have raised $3.1M from a16z and Concept Ventures to build a best-in-class voice agent, matching engine and web app experience that will redefine the way that talent and opportunity connect. Want to make an application Make sure your CV...

Senior Backend Engineer / Developer (TypeScript Node API) London / WFH to £100k The following information provides an overview of the skills, qualities, and qualifications needed for this role. Are you a senior technologist looking for an opportunity to progress your career in a hands-on role where you can make an impact? You could be joining a scaling tech company that has developed a digital...

Job Description Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £140,000 + meaningful equity 🏙️ Location: London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack: Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being...

Full Stack Engineer / Developer (Python TypeScript) London / WFH to £120k You can get further details about the nature of this opening, and what is expected from applicants, by reading the below. Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform. As...

Job Description Software Engineer – AI Startup – Up to 85k 🚀🧠 💰 Salary: £50,000 - £85,000 + meaningful equity 🏙️ Location: London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack: Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across...

Senior Full-Stack Engineer (Backend-Leaning) – SaaS + AI Join a seed-stage SaaS startup backed by leading VCs, adopting AI to redefine their product. They’re pre-PMF, mid-pivot, and need a hands-on engineer (~80% coding) to help build, define, and scale. #Full-stack engineering, backend-leaning (Next.js FE + BE, Node.js, TypeScript, legacy Python) Help guide a small, senior team Work on AI /...

Job Description Senior Full Stack Engineer – AI Startup – Up to 150k 🚀🧠 💰 Salary: £80,000 - £150,000 + meaningful equity 🏙️ Location: London, hybrid 💻 Tech Stack: Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) 📈 Team size: 27 heads Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across the globe and is...