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Backend Engineer – Java/Spring Boot & Python (Hybrid London)

Methods Business and Digital Technology Ltd is seeking a Back-end Developer specializing in Java Spring Boot and Python to join their private sector team in London. This hybrid role requires 3 days on-site each week. The successful candidate will lead the rebuild of core architecture, optimize technical connecto ...

Staff Backend Engineer (C++/Java/Go/Python/Typescript)

Fastest Growing Start-up in the UK | Defence We are partnered with one of the UK's fastest-growing start-ups. They are a very technically focused group building cutting-edge decision-making technology. The company's founding team has a real pedigree, with backgrounds from the UK Special For ...

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 ...

Cloud Native Backend Engineer (Java Spring Boot | Python)

Methods in the City of Westminster is seeking an architect to lead the migration and rebuilding of core architecture using Java Spring Boot within a cloud-native environment. Responsibilities include optimizing technical connectors, rebuilding catalog publication flows, and ensuring real-time synchronization of ...

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 ...

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 ...

Backend Engineer (Java/Python) for Critical Systems — London

ALTEN LTD - UK is hiring a Backend Software Engineer in London responsible for developing high-reliability software platforms. You'll focus on creating core operational software, working with data flows, and improving automation efficiency. Candidates should have strong Java and Python skills, a degree in Engine ...

Senior Python Engineer AI Backend & APIs (Remote UK)

Spectrum IT Recruitment is looking for a Senior Software Engineer to join a growing team focused on delivering AI-driven solutions. The role is fully remote across the UK and requires strong expertise in Python, API development, and cloud environments. As part of the team, you'll influence how systems are built ...

Remote Backend Python Engineer High Impact, AI Tools

SOLAS IT RECRUITMENT is looking for a Python Software Engineer to join a collaborative remote team in Northern Ireland. This role focuses on backend development, requiring strong Python and SQL skills, with an emphasis on data processing and system performance. The successful candidate will work in a small, agil ...

Remote Python Backend Engineer for AWS SaaS API

Client Server is seeking a Backend Software Engineer/Developer (Python API AWS SaaS) in Scotland. This role involves designing and developing features for a large-scale video platform on AWS. The ideal candidate has strong backend development skills in Python, experience with PostgreSQL, and familiarity with RES ...

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 Python Backend Engineer — Global, AI Powered & Cloud

Grid Dynamics is seeking experienced engineers in Greater London. You will build and own engineering systems for global finance software, utilizing Python and modern cloud-native technologies. Ideal candidates are skilled in AI-assisted engineering and have experience with DevOps tools like Docker and Kubernetes ...

Senior Backend Python Engineer for Scalable ML Platform

A fast-growing educational technology startup in London is seeking a Senior Back end Python Developer to help build scalable, ML-driven learning systems. You will leverage a modern tech stack, including Python, AWS, Docker, and Terraform, to design high-scale applications that serve millions of users. Collaborat ...

Senior Backend Engineer (Rust/Python) for Financial Tech

A financial services technology firm in the UK is seeking a financial software engineer to join their back-end team. This role includes engaging with stakeholders, designing solutions for data integration, and implementing cloud-native applications on AWS using Rust and Python. The ideal candidate will have a Ba ...

Lead Backend Engineer, Real Time Trading (C++/Python)

A leading global trading venue is seeking a seasoned professional for a leadership position focused on low-latency engineering and stakeholder collaboration. Located in London with a hybrid work model, the role requires strong C++ and Python skills, along with a proven track record in modernizing legacy systems. ...

Remote Senior Python Backend Engineer – AI Voice Platform

A leading tech recruitment agency has an exciting opportunity for a Senior Python Developer to join a market-leading tech firm. This fully remote position requires a candidate with strong backend development experience, deep Python skills, and familiarity with AI-powered systems. Responsibilities include designi ...

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 Senior Backend Engineer Python & Scale for Impact

A mission-driven tech scale-up is seeking a Senior Backend Engineer to design, build, and scale their core software platform. This hands-on role involves creating backend services in Python and improving system performance while collaborating with a high-performing team. The ideal candidate has strong experience ...

Senior Python Backend Lead Cloud & AWS (Hybrid Leeds)

A technology-driven company in Leeds seeks a Senior Python Developer to enhance their scalable cloud platform in Healthcare. In this role, you will design robust solutions, refine APIs, and contribute to a culture of mentorship and innovation. Candidates should have over 5 years of Python experience, excellent c ...

Senior Backend Engineer (Python) — AWS, 4 Day Week

A leading AI company in the UK seeks a Senior Software Engineer (Backend) to develop and maintain its innovative product, The Uncertainty Engine. In this full-time role, you will collaborate with cross-functional teams to deliver high-quality software solutions using Python and AWS, embracing continuous improvem ...

Senior Python/Django Backend Engineer Lead & Scale (Remote)

A technology company is seeking a Senior Developer with strong Python and Django expertise to take ownership of back-end systems. You'll work within a fast-paced environment, contributing to the Django REST API and enhancing system performance. This role offers a clear path toward technical leadership as the tea ...

Senior Backend Engineer Python/FastAPI, Scale up CPMS

A leading Charge Point Operator is seeking an experienced Senior Backend Engineer to develop their Charge Point Management System and customer-facing applications. This full-time, hybrid role based in Southwark involves backend development using Python and FastAPI, API design, and system performance optimization ...

Senior Python Backend Engineer for AI Prototypes (Remote)

A growing digital consultancy in the UK is seeking a Senior Software Developer (Python) to design and enhance AI prototypes. This role involves working collaboratively with engineers, managers, and designers to deliver high-quality, user-centric solutions. The ideal candidate should have strong experience in Pyt ...

Senior Backend Python Engineer – Scale & Impact (Hybrid, London)

A leading grounds maintenance company is seeking a Senior Backend Developer to join a product-focused engineering team. You will design and build backend applications that support complex workflows. The role combines exciting challenges in a hybrid working environment, fostering professional growth with clear ca ...

Python API Automation QA Engineer Backend Testing Remote

A leading technology company based in Cambridge is looking for a QA Test Engineer (Python API Automation) to ensure the quality of their core technology platform. The ideal candidate will have strong Python coding skills and test automation experience, focusing on backend testing of cloud-based solutions. The ro ...

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, ...

Python Backend Engineer Enterprise REST & CI/CD London

A recruitment agency is seeking a Backend Developer in London. This role offers a salary up to £65,000 p.a. with three office days per week. Responsibilities include developing in-house business systems, collaborating with teams, and following Agile methodologies. Candidates should have proven experience in ente ...

Backend Engineer (Go/Python) Scalable Web & Data Pipelines

A leading technology company in Cambridge is seeking a Back-End Engineer to design and maintain scalable web services using Go and Python. The candidate will face deep technical challenges and collaborate with cross-functional teams. Requirements include 5+ years in web service development, knowledge of various ...

Staff Backend Engineer (C++/Java/Go/Python/Typescript)

Job Description If you are interested in applying for this job, please make sure you meet the following requirements as listed below.Fastest Growing Start-up in the UK | Defence We are partnered with one of the UK's fastest-growing start-ups. They are a very technically focused group bui ...

Senior Backend Python Engineer AI Platform, Vice President

Are you looking for a career move that will put you at the heart of a global financial institution? We are seeking an exceptionally skilled Senior Python Software Engineer to architect and implement robust, scalable backend systems that power our advanced AI tools and services. This hands-on individual contri ...

Senior Backend Python Engineer AI Platform, Vice President

Are you looking for a career move that will put you at the heart of a global financial institution? We are seeking an exceptionally skilled Senior Python Software Engineer to architect and implement robust, scalable backend systems that power our advanced AI tools and services. This hands-on individual contri ...

Senior Product Engineer (TS/NodeJS/Vue)

The AI orchestration of your wildest imagination. n8n is the open workflow orchestration platform built for the new era of AI. We give technical teams the freedom of code with the speed of no-code, so they can automate faster, smarter, and without limits. Backed by a fiercely inventive commu ...

Software Engineer

I am looking for a Software Engineer to join a leading AI cybersecurity startup who recently secured an additional $20 million in Series A funding. This investment will support the continued scaling of their platform, which experienced nearly 5x growth over the past year alone. This Software Engineer ...

Software Engineer

I am looking for a Software Engineer to join a leading AI cybersecurity startup who recently secured an additional $20 million in Series A funding. This investment will support the continued scaling of their platform, which experienced nearly 5x growth over the past year alone. This Software Engineer ...

Senior .NET Backend Developer (Sportsbook/iGaming)

Overview Full-time | Remote (Europe) | 100% B2B Contract | Salary DOE We looking for a Senior .NET Backend Developer to join a high-impact engineering team building one of the most demanding real-time sportsbook platforms on the market. If youe passionate about distributed systems, performan ...

Backend WordPress Developer (Remote UK Only)

Backend WordPress Developer (Remote - UK Only) We’re looking for a skilled and motivated Backend Developer to join our growing team at Zap. This role offers flexible working hours and coverage of out‑of‑office client support requests from 6 PM – 9 PM UK time. If you thrive in a fast‑paced, collab ...

Backend Developer London £75 140k + equity

About Corgi- Corgi is an AI-powered insurance company designed for tech startups.- The company has raised $108M and holds regulatory approval as a licensed carrier.- The platform is built on Django, utilizes Stripe for payments, and features AI-driven underwriting.- Corgi is currently scal ...

Lead Backend Developer Java, AWS & Kubernetes

A leading music company is seeking a Lead Developer to design, develop, and maintain external-facing royalty portals using Java. The role involves building AWS serverless solutions, working with Docker and Kubernetes, and providing technical leadership within the development team. Candidates should have strong e ...

Backend Engineer, Developer Enablement (Java/Kotlin)

A global financial services firm in Belfast is seeking a server side engineer to join its Chief Technology Office. This role emphasizes driving solutions within projects like SDLC Automation and Release on Demand, enhancing productivity for 30k engineers. The ideal candidate will write quality code in Kotlin or ...

Senior Software Engineer Backend, Developer Publications

Summary The documentation engineering team is responsible for creating world‑class developer tools and framework‑level support for the documentation workflows on the developer website and Xcode. We’re looking for a software engineer to join the backend team and continue to scale and improve our ex ...

Backend Platform Engineer – Developer Tools & Enablement

Citibank (Switzerland) AG is seeking a Server Side Engineer in Belfast to join their CTO's Developer Enablement team. This role involves producing high-quality backend code and developing innovative tools for the bank's engineers. Candidates should have strong experience in Kotlin or Java, and proficiency with d ...

Senior Java Backend Developer Hybrid (Edinburgh)

HCLTech is seeking an experienced Senior Java Backend Developer to work in Leeds, UK. The ideal candidate should have over 15 years of experience with strong skills in Java 17 and Spring Boot, alongside familiarity with Google Cloud Platform. This full-time position features a hybrid workmodel requiring 2 days o ...

Senior .NET Web Developer & Backend Engineer

Location: Alderley Park, Cheshire (Hybrid/Flexible) About Venn We are a fast-scaling SaaS business transforming how recruitment agencies and employer brands attract talent. Our powers high-performance websites for over 200 global clients. As we scale, we need a hands‑on Senior .Ne ...

Impactful Backend Java Developer | Public Sector

IBM in the United Kingdom is seeking a Backend Java Developer to design and deliver high-quality applications using Java/JEE and modern technologies. The successful candidate will work on backend components, apply best practices like dependency injection and test-driven development, and collaborate with various ...

Senior Software Engineer Backend, Developer Publications

Summary Posted: 23 Apr 2026 Weekly Hours: 35 Role Number: The documentation engineering team is responsible for creating world‑class developer tools and framework‑level support for the documentation workflows on the developer website and Xcode. We’re looking for ...

Backend Java/Kotlin Developer — Microservices & Agile

TESTQ Technologies Limited in Sheffield is looking for a skilled backend developer to collaborate with a cross-functional team. The role includes designing and implementing backend features, building APIs and microservices, and working in an agile CICD environment. Candidates should have experience in Java, be w ...

Senior Backend Engineer — Developer Platform & APIs

A financial technology company based in Greater London is seeking a Senior Backend Engineer to join their App Store & Ecosystem squad. The ideal candidate will have over 5 years of experience in backend engineering, specializing in TypeScript and API design. You will contribute to building a developer ecosystem, ...

Backend Developer (Kotlin/Java), UK – CIMAR

Company Overview CIMAR UK Ltd, now a part of DeepHealth, is a leading provider in the SaaS (Software-as-a-Service) healthcare sector, specialising in advanced cloud-based image management solutions. Our technology empowers healthcare organisations to optimise image management processes, enhance pa ...

Backend Senior OR Lead Magento Developer

Backend Senior OR Lead Magento Developer Back-end Senior/Lead Magento Developer We are a young, dynamic and rapidly growing web development agency based in SW London with some cool clients and great projects. Due to continued success and growth we are on the lookout for a talented se ...

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