1 to 25 of 47 Backend Developer Jobs in the City of London

Mid-Senior Backend Developer (Node.js) 2 days p/week in London £45-70k depending on experience Would you like the opportunity to join a rapidly growing organisation who have doubled in size every 12 months for the past few years. They’re currently looking for a … with Node.js Familiarity with message brokers like SNS, Kafka, or similar. AWS. Interest working with data would be a bonus. If you’re a Backend Developer who has a real interest in software and technology, please apply. More ❯

Job Summary: We are seeking a highly skilled Python Backend Developer with strong experience in building Microservices-based architectures and cloud-native server less solutions on AWS . The ideal candidate will be responsible for designing, developing, and maintaining scalable backend systems, ensuring high performance and responsiveness … to requests from front-end applications and third-party systems. Key Responsibilities: Design and develop robust backend services and RESTful APIs using Python (FastAPI, Flask, or Django) Build and deploy microservices that are scalable, loosely coupled, and independently deployable Develop and manage serverless applications using AWS Lambda , API Gateway … and code reviews Automate deployments using CI/CD pipelines and Infrastructure as Code (IaC) tools like CloudFormation or Terraform Monitor, debug, and optimize backend systems for performance and scalability Required Skills & Experience: 7+ years of backend development experience using Python Strong experience in designing and implementing microservices More ❯

Job Summary: We are seeking a highly skilled Python Backend Developer with strong experience in building Microservices-based architectures and cloud-native server less solutions on AWS . The ideal candidate will be responsible for designing, developing, and maintaining scalable backend systems, ensuring high performance and responsiveness … to requests from front-end applications and third-party systems. Key Responsibilities: Design and develop robust backend services and RESTful APIs using Python (FastAPI, Flask, or Django) Build and deploy microservices that are scalable, loosely coupled, and independently deployable Develop and manage serverless applications using AWS Lambda , API Gateway … and code reviews Automate deployments using CI/CD pipelines and Infrastructure as Code (IaC) tools like CloudFormation or Terraform Monitor, debug, and optimize backend systems for performance and scalability Required Skills & Experience: 7+ years of backend development experience using Python Strong experience in designing and implementing microservices More ❯

Job Title: Python Backend Developer (Senior, IC) 💰Salary: Up to £140,000 per year + equity (further flexibility for exceptional candidates) 🏙Working Arrangement: Hybrid (3 days in office), London 📝 Employment Type: Permanent ✅ Core Tech : Python, PostgreSQL, AWS ☑ Other Tech: BigQuery, pub/sub, Celery, Redis, RabbitMQ, Typescript, React … is utilising ML to change the way people learn - and customers are loving it! 📋 The Task? You'll be working to scale up the backend systems to meet the rapidly growing surge of demand. Once scalability has been tackled, it's all speed ahead on new feature development! 💭 What … products. 👀 Sounds like something that could be right for you? Hit apply! i Alternatively, you can reach me at jonty@limitlessrec.co.uk Job Title: Python Backend Developer (Senior, IC More ❯

Job Title: Python Backend Developer (Senior, IC) 💰Salary: Up to £140,000 per year + equity (further flexibility for exceptional candidates) 🏙Working Arrangement: Hybrid (3 days in office), London 📝 Employment Type: Permanent ✅ Core Tech : Python, PostgreSQL, AWS ☑ Other Tech: BigQuery, pub/sub, Celery, Redis, RabbitMQ, Typescript, React … is utilising ML to change the way people learn - and customers are loving it! 📋 The Task? You'll be working to scale up the backend systems to meet the rapidly growing surge of demand. Once scalability has been tackled, it's all speed ahead on new feature development! 💭 What … products. 👀 Sounds like something that could be right for you? Hit apply! i Alternatively, you can reach me at jonty@limitlessrec.co.uk Job Title: Python Backend Developer (Senior, IC More ❯

we are accelerating our vision to become the go-to provider for AI-driven automation solutions across the globe. About the Role As Senior Backend Developer in the Product team, you are responsible for building features and designing and implementing new endpoints. This involves diverse tasks from gathering … We Work About You 5+ years working with Python and frameworks like Django, Flask, or FastAPI, with a strong command of building and optimizing backend systems. Hands-on experience with relational/SQL databases, ensuring efficient and reliable data management. Well-versed in software engineering essentials such as unit More ❯

Lead Backend Developer Location: Dubai Duration: Permanent Package: 35,000 – 40,000 AED per month plus benefits We're currently partnered with a forward-thinking technology company based in Dubai that is poised to transform the payments landscape. With ambitious expansion plans across the MENA and APAC regions More ❯

Lead Backend Developer Location: Dubai Duration: Permanent Package: 35,000 – 40,000 AED per month plus benefits We're currently partnered with a forward-thinking technology company based in Dubai that is poised to transform the payments landscape. With ambitious expansion plans across the MENA and APAC regions More ❯

Onsite 3 days a week 9-month initial contract Up to £600 per day Outside of Scope We are looking for an experienced Senior Backend Developer to join our team on a contract basis. The ideal candidate will have expertise in serverless cloud software development using TypeScript and … Azure Cloud Functions , with strong NoSQL knowledge and automation skills. This role is critical to maintaining and enhancing our backend platform, ensuring scalability, reliability, and best practices in development and deployment. #J-18808-Ljbffr More ❯

Location: London EC2 (Office-based, 5 days pw - Monday to Friday) Salary: £70,000 – £80,000 + bonus Type: Full-time, Permanent Backend Java Developer Overview A leading FCA-regulated financial technology firm is seeking an experienced Backend Java Developer to join its growing team. This More ❯

Location: London EC2 (Office-based, 5 days pw - Monday to Friday) Salary: £70,000 – £80,000 + bonus Type: Full-time, Permanent Backend Java Developer Overview A leading FCA-regulated financial technology firm is seeking an experienced Backend Java Developer to join its growing team. This More ❯

to excel in a dynamic, high-energy environment. Join our team and help shape the future of AI. 🌎 Location and Legalities This full-time Backend Web Developer position is based onsite in our brand-new Ultralytics office in London, UK. Applicants must have legal authorization to work in … the UK, as Ultralytics does not provide visa sponsorship. 🚀 What You'll Do As a Backend Web Developer at Ultralytics, you will be the architect behind the scalable, high-performance services that power Ultralytics HUB. You will build the backbone that supports our global community in training and … frontend and AI research teams to deliver seamless, end-to-end features for our cutting-edge AI models. 🛠️ Skills and Experience 5+ years of backend development experience, with a strong portfolio of building scalable, production-grade web services. Expert-level proficiency in Python and significant experience with modern web More ❯

to excel in a dynamic, high-energy environment. Join our team and help shape the future of AI. 🌎 Location and Legalities This full-time Backend Web Developer position is based onsite in our brand-new Ultralytics office in London, UK. Applicants must have legal authorization to work in … the UK, as Ultralytics does not provide visa sponsorship. 🚀 What You'll Do As a Backend Web Developer at Ultralytics, you will be the architect behind the scalable, high-performance services that power Ultralytics HUB. You will build the backbone that supports our global community in training and … frontend and AI research teams to deliver seamless, end-to-end features for our cutting-edge AI models. 🛠️ Skills and Experience 5+ years of backend development experience, with a strong portfolio of building scalable, production-grade web services. Expert-level proficiency in Python and significant experience with modern web More ❯

an agentic AI system that seamlessly integrates into clients' systems, automating compliance and portfolio risk analysis processes Job Summary: We are seeking a skilled Backend Developer with 2-5 years experiences to join our dynamic team. In this role, you will be instrumental in designing, building, and maintaining … the backend infrastructure that powers our SaaS platform. You will work closely with cross-functional teams to ensure seamless integration and the optimal performance of our systems. Responsibilities: Work closely with our data and engineering teams to understand and improve the current code repository and dataset structures. Build and … data integrity and security through the implementation of best practices and industry standards. Collaborate with frontend developers, data scientists, and product managers to integrate backend services with AI/ML models and frontend applications. Implement data processing pipelines to handle large volumes of financial data efficiently. Write clean, maintainable More ❯

an agentic AI system that seamlessly integrates into clients' systems, automating compliance and portfolio risk analysis processes Job Summary: We are seeking a skilled Backend Developer with 2-5 years experiences to join our dynamic team. In this role, you will be instrumental in designing, building, and maintaining … the backend infrastructure that powers our SaaS platform. You will work closely with cross-functional teams to ensure seamless integration and the optimal performance of our systems. Responsibilities: Work closely with our data and engineering teams to understand and improve the current code repository and dataset structures. Build and … data integrity and security through the implementation of best practices and industry standards. Collaborate with frontend developers, data scientists, and product managers to integrate backend services with AI/ML models and frontend applications. Implement data processing pipelines to handle large volumes of financial data efficiently. Write clean, maintainable More ❯

Back End Developer (Java/Ruby on Rails/Spring/SQL/Python) My global fintech client is looking for a strong back end developer to join their ever expanding dev team on a permanent basis. Here are the technical requirements for the role: Essential Skills Java More ❯

this job and more exclusive features. About Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at mid to senior levels who are passionate about crafting exceptional products. Initially, this will be a five-month contract with potential … It is a full-time position, 40 hours per week. If interested, please send us your CV. Accountabilities Play a pivotal role in the backend engineering team, helping to build full-stack cloud applications. Utilize Python and AWS Cloud services for backend development. Adopt a serverless-first approach … to application design, collaborating within an agile team alongside other backend engineers and product designers. Strategize, develop, test, and deploy new features and experiments. Engage in collaborative coding practices such as pair programming and code reviews. Contribute to resolving complexities in large-scale systems and extensive datasets. Collaborate closely More ❯

Backend Developer – Python £650/day – 6 months – Inside IR35 – 3 days onsite (London) Python – Kafka – AWS – TypeScript – Commodities Trading You'll be working for a leading energy trading business, building out a modern post-trade platform that's genuinely pushing boundaries – live PnL, intraday position reporting, and … that backs its tech, delivers fast, and builds for the long-term. The must-haves: Strong Python experience (hands-on and recent) Experience building backend services in a product team Kafka or other message queue systems Comfortable working in fast-moving agile squads Experience in commodities or trading (preferred More ❯

Backend Developer – Python £650/day – 6 months – Inside IR35 – 3 days onsite (London) Python – Kafka – AWS – TypeScript – Commodities Trading You'll be working for a leading energy trading business, building out a modern post-trade platform that's genuinely pushing boundaries – live PnL, intraday position reporting, and … that backs its tech, delivers fast, and builds for the long-term. The must-haves: Strong Python experience (hands-on and recent) Experience building backend services in a product team Kafka or other message queue systems Comfortable working in fast-moving agile squads Experience in commodities or trading (preferred More ❯

accessible and commission-free, they’re genuinely reshaping how everyday people build their financial futures. They’re now looking for both Senior and Staff Backend Engineers to join the team. The stack is primarily TypeScript and Node.js , but they’re open to strong backend engineers from any background More ❯

accessible and commission-free, they’re genuinely reshaping how everyday people build their financial futures. They’re now looking for both Senior and Staff Backend Engineers to join the team. The stack is primarily TypeScript and Node.js , but they’re open to strong backend engineers from any background More ❯

Backend-Leaning Full-Stack TypeScript Developer – Perm – up to £110k – (2-3) days on-site in London I am looking for a Backend-Leaning Full-Stack TypeScript Developer for an AI-driven, Fintech startup based in London. You will be able to define, shape and implement … impact how users interact with AI in a professional capacity. ✅ We're Looking For: 3+ years experience with Node.js and TypeScript Solid understanding of backend architecture , databases (PostgreSQL), and API design Exposure to React on the front end (bonus for design system knowledge) Experience with cloud infrastructure (preferably AWS … AI/ML, or startups If this role is of interest, please apply with a copy of your CV, along with desired salary expectations. Backend-Leaning Full-Stack TypeScript Developer – Perm – up to £110k – (2-3) days on-site in London More ❯

I am hiring a Senior Python Backend Developer! You will be joining a fully remote team building a smarter way to handle micropayments and will work with a collaborative, cross-functional team to solve real-world problems, shape architecture, and take our product to market. If you love More ❯

healthtech, and telecom, and a $90B+ market in sight, we're scaling fast in 2025 and beyond. 🔍 The Role We’re looking for a Backend Engineer (Kotlin) to evolve and scale the control-plane of our SaaS platform. With customer adoption climbing, we need extra fire-power to extend … core services and keep pace with new feature demand. Reporting to the Backend Team Lead , you’ll build services that power everything the UI depends on. You’ll work closely with Product Management on feature design and pair with frontend engineers. The role offers plenty of scope to shape More ❯

healthtech, and telecom, and a $90B+ market in sight, we're scaling fast in 2025 and beyond. 🔍 The Role We’re looking for a Backend Engineer (Kotlin) to evolve and scale the control-plane of our SaaS platform. With customer adoption climbing, we need extra fire-power to extend … core services and keep pace with new feature demand. Reporting to the Backend Team Lead , you’ll build services that power everything the UI depends on. You’ll work closely with Product Management on feature design and pair with frontend engineers. The role offers plenty of scope to shape More ❯