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Senior Backend Engineer Hybrid (Holborn) with High Impact

La Fosse is seeking a Senior Backend Engineer to join their AgTech team. This position, based in Holborn, London, offers a hybrid work setup with only one day required on-site. The ideal candidate will bring strong startup experience and a proven track record in building and scaling backend systems. With a focus ...

Engineering Lead — AI Finance Backend (Remote 3mo/yr)

Jack & Jill is seeking an Engineering Lead in Greater London to spearhead a high-performing backend engineering team. This role demands a blend of hands-on technical skills in Python and AWS, leadership in a fast-paced environment, and a focus on building scalable solutions. The position offers a unique opportun ...

Senior Backend Software Engineer in London Engineering Employment

Job Description The job responsibilities include: Deploying ML workloads in streaming systems Influencing architecture and owning key infrastructure components Experience in Python Familiarity with JIRA and Confluence Hybrid role – 2 d ...

Senior Backend Engineer – Real Time Crypto Trading (Remote)

Kraken is seeking a Senior Backend Engineer for its Breakout platform in the UK. You will design and implement core backend services, focusing on metrics and performance monitoring. The role requires extensive experience with C#, ASP.NET Core, and PostgreSQL, as well as familiarity with AWS. Join a mission-drive ...

Backend Platform Architect for AI Systems (Python) + Equity

SR2 | Socially Responsible Recruitment | Certified B Corporation™ is seeking a Senior Backend Engineer in London to design and build robust backend systems using Python. You will work with a high-calibre startup developing an agentic AI product, focusing on infrastructure and tooling. Responsibilities include de ...

Senior Backend Software Engineer | Financial Services | London, Hybrid

Senior Backend Software Engineer | Financial Services | London, Hybrid Our client is a high-growth, well-backed fintech that is scaling rapidly and looking to add experienced Senior Backend Software Engineers to the their engineerin team. This is a strong opportunity for someone who enjoy ...

Senior Backend Engineer Build Scalable APIs for Fans

A tech startup in London is seeking a Senior Software Engineer, Backend to build and maintain the backend services for a football fan platform. The ideal candidate will have strong proficiency in TypeScript and Node.js, with extensive experience in AWS and database management. Responsibilities include designing ...

Backend Engineer, Senior (Rust) London, England, United Kingdom

Affinidi is a technology company dedicated to changing data ownership for good. We empower businesses and individuals with control and ownership of their data, with a comprehensive approach to managing their holistic identity – accounting for all aspects of their digital footprint while ensuring pr ...

Staff Backend Engineer (£140k £160k+ + Equity) at Fleek

Job Title Staff Backend Engineer Salary £140k-£160k+ + Equity Company Description Fleek - VC-backed marketplace platform transforming the global B2C supply chain. Job Description As a Staff Backend Engineer at Fleek, you will lead the technica ...

Senior Backend Engineer – Remote, Cloud Scale Open Source

Grafana Labs is seeking a skilled engineer for a remote role focusing on the Grafana Mimir OSS project. The ideal candidate will work on delivering solutions related to metrics and influence product roadmaps. You should have solid experience with programming, preferably in Go, and the ability to develop robust s ...

Senior Backend & API Engineer, Payouts at Global Scale

Stripe is seeking a Backend Engineer in Greater London to manage money at a global scale. The ideal candidate has 7-12+ years of software engineering experience and strong coding skills. Responsibilities include building and maintaining APIs, mentoring engineers, and collaborating with teams. The position offers ...

Founding Backend Engineer – AI Studio (London, On Site)

Prism Digital is seeking a Founding Engineer to join an early-stage AI venture studio in London. This role focuses on backend development, where you'll manage core systems and engage directly with the CTO. You will need strong experience in Python, FastAPI, and backend architecture fundamentals, along with a pro ...

Senior Backend Engineer | Go Microservices + Equity + Remote Day

Wheely, based in West London, is seeking a Mid/Senior Backend Engineer to enhance their Marketplace team. This office-based position requires 3+ years of experience in backend services, ideally with Go, and involves responsibilities such as writing performant code, implementing new microservices, and optimizing ...

Senior Python Backend Engineer for AI Energy Efficiency

Roc Search is looking for a Python focused Software Engineer to join their team in Greater London. This position involves developing advanced AI solutions aimed at optimizing energy efficiency in data centers. Responsibilities include building and maintaining internal tools, collaborating on feature design, and ...

Senior Python Backend Engineer Lead Tech & Crypto Equity

LinuxRecruit in Greater London is seeking a Software Engineer for back-end development to drive team innovation in telecommunications. You will design and scale backend systems, utilizing your expertise in Python and frameworks suitable for diverse technical challenges. This role offers autonomy over technical d ...

Senior Full Stack Engineer: AI Powered, Scalable Backend

Pynea is seeking a Senior Fullstack Engineer in Greater London to develop the enterprise backbone of an AI hiring intelligence system. You will design high-concurrency APIs, ensure system reliability, and navigate complex AI challenges within a fast-paced environment. Candidates must demonstrate strong skills in ...

Backend Product Engineer — Build Scalable Investment Features (Hybrid)

About Freetrade Freetrade’s mission is to become the default place to invest. Investing has been too complicated and expensive for too long, keeping millions from making the most of their savings. We’re changing that. We’re building our team and looking for people who are excited to ...

Backend Engineer TS & AI APIs for Blockchain Compliance

ArtOfBlockchain is looking for a backend engineer to join the Automation Forge team in Greater London. This role involves designing APIs and event-driven workflows using TypeScript and Node.js, while integrating AI frameworks. Applicants should have 3–6 years of experience and a strong grasp of AWS services. The ...

Senior Lead Software Engineer Backend Engineer Chase UK

At JP Morgan Chase, we understand that customers seek exceptional value and a seamless experience from a trusted financial institution. That's why we launched Chase UK to transform digital banking with intuitive and enjoyable customer journeys. With a strong foundation of trust established by millions of c ...

Defence Tech Lead: Backend & AI Engineer (SC Eligible)

A cutting-edge AI company in Greater London seeks a Lead Software Engineer to spearhead backend and edge/IoT engineering for Defence projects. This role requires leading a team, designing complex components, and implementing CI/CD processes. Proficiency in Python and at least one compiled language is essential. ...

Senior Backend Engineer, Cloud Platform Scale Secure Infra

A leading infrastructure company in Greater London is seeking a Software Engineer to architect and develop its cloud platform. The ideal candidate will have extensive experience with Go and Kubernetes, and a strong focus on security and performance. This role offers the opportunity to collaborate with a talented ...

Backend Software Engineer C#/.NET, SQL (London Onsite)

A leading technology firm in London seeks a Backend Software Engineer with expertise in C# .NET and SQL. Join a collaborative team to develop algorithmic trading systems, ensuring high performance and scalability. Ideal candidates will have a strong academic record, advanced programming skills, and a thorough un ...

Senior Software Engineer Backend & Infrastructure (f/m/d)

About The Opportunity As a Senior Software Engineer focused on content storage infrastructure domain you will be responsible for innovating and maintaining Contentful’s underlying storage infrastructure and adjacent services. You will work on the very foundation of Contentful that ...

Senior Software Engineer Backend & Infrastructure (f/m/d)

London, England, United Kingdom About the Opportunity As a Senior Software Engineer focused on content storage infrastructure domain you will be responsible for innovating and maintaining Contentful’s underlying storage infrastructure and adjacent services. You wil ...

Backend Engineer (Python) for AI First Patent Platform

A leading AI-first patent research platform in the UK seeks a software engineer to develop core features and collaborate with senior engineers. Candidates should have over 2 years of engineering experience, strong Python skills, and familiarity with Django. This position requires working onsite three days per we ...

Remote Lead Backend Engineer AI Driven Fintech Platform

A dynamic international fintech startup is seeking a Lead Backend Engineer to join their growing AI & Back Office team. In this role, you will have total autonomy to design backend systems and mentor engineers to maintain high code quality. With a focus on integrating AI solutions into production, you will help ...

Backend Engineer at London based voice AI startup

Job Title Backend Engineer Salary Not Disclosed Company Description London-based voice AI startup building real‑time interpretation infrastructure Location London, UK Job Description As the second backend engineer, you will w ...

Backend & API Engineer, Payouts — Global Money APIs Equity

Monograph is hiring a Backend/API Engineer for their Payouts team in Greater London. In this role, you'll develop and maintain APIs for efficient money management on a global scale. We are looking for a candidate with 2-12 years of software engineering experience, strong coding skills, and the ability to work au ...

Senior Python Backend Engineer — Scalable APIs & AI Workflows

A dynamic scale-up in the fintech space is looking for a Senior Python Developer to join their team in Greater London. In this role, you'll implement robust solutions, design REST APIs, and ensure code quality through testing and reviews. The company offers a competitive salary between £70,000 and £95,000, hybri ...

Greenfield Go Backend Engineer – Real Time Trading Data

XTX Markets is seeking a Software Engineer for their new Trading Data Technology team in London. This role involves designing and operating a greenfield Trading Data platform, handling tasks in back-end services primarily using Go, and engaging in full software development lifecycles. Candidates with 3-5 years o ...

Full Stack Engineer (C#Backend/React.NET Front End)

Full Stack Engineer (C# / .NET & React) - Investment Banking We are working with a leading global investment bank to hire a hands‑on Full Stack Engineer to help build a brand‑new, high‑impact web application from the ground up. This is a unique opportunity to take ownership of a g ...

Senior Backend Engineer AI Platform (f/m/d)

About the Opportunity Join Contentful as a Senior AI Software Engineer (f/m/d) and innovate with AI Integrations. At Contentful, we empower thousands of customers to manage content at scale with speed, flexibility, and precision. We are seeking talented senior AI software engineers to join our AI ...

Senior Backend Engineer: Python/FastAPI, LLMs & AI APIs

Weekday AI (YC W21) is looking for a Senior Backend Engineer based in London. You will design and develop scalable backend systems focusing on AI applications and microservices. The role requires 5-9 years of backend experience, strong Python skills, and experience with frameworks such as FastAPI. You will integ ...

Senior Backend Engineer (Node/TypeScript) Build Scalable FinTech

Legal & General is looking for a Senior Backend Engineer to join their engineering team in Greater London. The role includes delivering high-quality features, addressing technical debt, and promoting a collaborative team culture. Candidates should have at least 3 years of backend development experience, strong k ...

Senior Backend Engineer – Real Time Crypto Trading (Remote)

Kraken is seeking a Senior Backend Engineer for its Breakout platform in the UK. You will design and implement core backend services, focusing on metrics and performance monitoring. The role requires extensive experience with C#, ASP.NET Core, and PostgreSQL, as well as familiarity with AWS. Join a mission-drive ...

Backend Platform Architect for AI Systems (Python) + Equity

SR2 | Socially Responsible Recruitment | Certified B Corporation™ is seeking a Senior Backend Engineer in London to design and build robust backend systems using Python. You will work with a high-calibre startup developing an agentic AI product, focusing on infrastructure and tooling. Responsibilities include de ...

Senior Backend Engineer AI APIs & Scalable Infra (London)

W Talent is looking for a Senior Backend Engineer to join their London team. As part of a rapidly growing consumer technology company focused on AI, you will be responsible for designing and implementing backend services using Python, FastAPI, and Django. The role requires strong expertise in REST APIs and Postg ...

Senior Backend Software Engineer | Financial Services | London, Hybrid

Senior Backend Software Engineer | Financial Services | London, Hybrid Our client is a high-growth, well-backed fintech that is scaling rapidly and looking to add experienced Senior Backend Software Engineers to the their engineerin team. This is a strong opportunity for someone who enjoy ...

ML Full Stack Engineer: Python Backend & AI Systems

Machine Learning Software Engineer - Full Stack (LLM) London, United Kingdom Bachelor’s degree in Computer Science, Computer Engineering, or a related technical background. Experience Backend software engineering experience in Python. Responsibilities and Requirement ...

Lead C++ Engineer Low Latency Trading Backend (London)

A global fintech firm in London is seeking an Engineering Squad Lead for its backend operations. The role involves leading a team to work on low-latency C++ systems, improving delivery processes, and modernising legacy components. Candidates should have strong C++ experience, exposure to Python, and the ability ...

Remote Backend Engineer Casino UX, Real Time & Scale

A leading betting platform is seeking a Senior Backend Engineer to join their Casino UX team. You will design and maintain robust backend systems and RESTful APIs using technologies such as Python and Flask. This remote role offers the chance to impact millions of fans and work in a modern engineering culture. I ...

Senior Go Backend Engineer for Energy Nimbus Platform

An Energy Tech company in London is seeking a Software Engineer to enhance their platform Nimbus. You will work within a cross-functional team to automate energy trading, manage telemetry data, and build backend services using Go and AWS. The ideal candidate will possess strong problem-solving abilities and expe ...

Senior Backend Engineer High Throughput, Event Driven APIs

A leading financial services technology firm in the UK is seeking a Backend Engineer to enhance their event-driven architecture. The successful candidate will develop high-throughput Node.js microservices and manage Kafka implementations. This role requires strong experience in distributed systems and relational ...

Senior Backend Engineer — AI First Platform, Equity & Hybrid

A tech-driven company in London seeks a Senior Backend Engineer to build and scale backend services for an AI-first platform. This role involves designing and owning core services and collaborating with product teams. Ideal candidates will have over 4 years of experience, strong programming skills in Typescript ...

Hybrid .NET Backend Engineer — AWS, SQL & REST APIs

A fast-paced startup in Greater London is seeking a Back-End Developer to design and build robust server-side applications using .NET and C#. This role offers hybrid working and involves implementing critical business logic, developing RESTful APIs, and leveraging AWS services. The ideal candidate should have a ...

Senior Backend Python Engineer Django REST & AI Data

A leading financial tech scale-up in Greater London is seeking Mid and Senior Python Developers to join its backend team. The role involves creating robust and scalable solutions in Python, designing REST APIs, and ensuring code quality. Candidates should have over 4 years of professional experience with Python, ...

Hybrid Backend Engineer for AI First Benefits Platform

A progressive technology company is looking for a Backend Engineer to help build an AI-first benefits platform. Responsibilities include designing and scaling backend architecture, developing core services, and collaborating with product teams. The ideal candidate has 3+ years of experience with modern backend l ...

Backend Engineer – AI Driven, Cross Team Ownership (Golang)

A dynamic delivery service company in Greater London is seeking a Backend Engineer to join their Promotions team. This role is focused on backend development, ideally with expertise in Golang. Candidates should have experience leading cross-functional projects and utilizing AI tools like Codex and Claude to impr ...

Go Backend Engineer – AI Driven FinTech, Flexible Remote

A forward-thinking FinTech firm in London seeks a Software Engineer (Go) to develop high-performance back-end services supporting financial applications. The ideal candidate will have strong AI integration skills, proficiency in JavaScript and experience with modern development tools. Benefits include 38 days of ...

Senior .NET Backend Engineer – Hybrid London (Azure/Cloud)

A fast-growing fintech company in Central London is seeking a Senior .NET Engineer to join their backend team. In this role, you will design and build scalable, high-performance systems using C# and .NET. The ideal candidate will have solid experience in cloud environments, REST APIs, and excellent problem-solvi ...

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