1 to 25 of 42 Backend Developer Jobs in London

Job Title: Backend Python Developer Job Type: Permanent Location: London Salary: £55,000-£65,000 DOE Skills: Python, AWS, CI/CD, Docker Kubernetes, JavaScript Roc Search have partnered with a vibrant data focused agency in London. They are seeking an experienced Backend Engineer with a strong foundation in Python and object-oriented programming. In this role … the server-side components of our software applications. You will collaborate closely with cross-functional teams, Data Engineers, Cloud Engineers, and Product stakeholders, to deliver scalable, secure, and efficient backend solutions. The ideal candidate will have solid experience in CI/CD pipelines, cloud infrastructure (especially AWS), and modern backend architectures. Familiarity with event-driven or microservice-based … and applications. A familiarity with cloud-based AI/ML services in Snowflake Cortex or DOMO AI would be a strong advantage. Key Reponsibilities Design and implement robust, scalable backend systems using Python as the primary language. Apply object-oriented principles and design patterns to maintain clean, maintainable code. Leverage cloud-native services (primarily AWS) including Aurora, Load Balancer More ❯

Job Title: Backend Python Developer Job Type: Permanent Location: London Salary: £55,000-£65,000 DOE Skills: Python, AWS, CI/CD, Docker Kubernetes, JavaScript Roc Search have partnered with a vibrant data focused agency in London. They are seeking an experienced Backend Engineer with a strong foundation in Python and object-oriented programming. In this role … the server-side components of our software applications. You will collaborate closely with cross-functional teams, Data Engineers, Cloud Engineers, and Product stakeholders, to deliver scalable, secure, and efficient backend solutions. The ideal candidate will have solid experience in CI/CD pipelines, cloud infrastructure (especially AWS), and modern backend architectures. Familiarity with event-driven or microservice-based … and applications. A familiarity with cloud-based AI/ML services in Snowflake Cortex or DOMO AI would be a strong advantage. Key Reponsibilities Design and implement robust, scalable backend systems using Python as the primary language. Apply object-oriented principles and design patterns to maintain clean, maintainable code. Leverage cloud-native services (primarily AWS) including Aurora, Load Balancer More ❯

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 it will be a five-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being … their London office. It is a full-time role, 40 hours per week. If this role feels right, send us your CV. Accountabilities: Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps. You'll be using Python and AWS Cloud services on the backend. Adopt a Server-less 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 within the team. Contribute to resolving the complexities inherent in large-scale systems and extensive datasets. Foster close collaboration with our Product, Data More ❯

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 it will be a five-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being … their London office. It is a full-time role, 40 hours per week. If this role feels right, send us your CV. Accountabilities: * Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps. * You'll be using Python and AWS Cloud services on the backend. * Adopt a Server-less 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 within the team. * Contribute to resolving the complexities inherent in large-scale systems and extensive datasets. * Foster close collaboration with our Product, Data More ❯

k + Benefits 2 days on site in North London 3 days remote I am recruting for a talented and driven Backend Engineer to join a dynamic team, focused on the creation and deployment of innovative software solutions. As a Backend Engineer, you will work closely with cross-functional teams, including engineering, product management, design, and quality assurance … features by working alongside engineering, product management, design, and QA teams. Promote best practices : Advocate and enforce coding standards, architectural patterns, and best practices. Your in-depth knowledge of backend technologies will help guide and support your peers, ensuring high-quality code. Automation and process improvement : Increase development efficiency, reliability, and scalability by creating automated processes that streamline workflows. … with Flask, FastAPI, or similar frameworks). Expertise in designing architectures that meet scalability, reliability, and security goals. Strong problem-solving skills, particularly in product development. Solid understanding of backend best practices, coding standards, and architectural patterns. Experience in automating builds (CI/CD), feature flags, and automated testing. Bonus Skills: Experience with message-driven systems (e.g., Google Pub More ❯

Lunar Ventures and Stride VC, 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 requirements and giving feedback on … team. Our Stack And How 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 testing, CI/CD, integration More ❯

is the core of Playtech's overall commitment to responsible business practices. Ready to level up your career? Playtech‘s Playtech Sports unit is looking for a proactive Software Developer – Backend Content with excellent communication and problem-solving skills. Job Description Your influential mission. You will... Develop our Sportsbook product and related applications. Implement new features and maintain More ❯

Job Title: Lead Senior Specialist - Back-end .NET Developer - Fully Remote Job Overview: We are seeking a talented Lead Senior Specialist in Back-end .NET Development to join our client's dynamic Agile development team. This role is crucial in shaping strategic product modules, particularly the payroll calculation engine. The ideal candidate will possess a strong technical foundation and More ❯

Job Title: Lead Senior Specialist - Back-end .NET Developer - Fully Remote Job Overview: We are seeking a talented Lead Senior Specialist in Back-end .NET Development to join our client's dynamic Agile development team. This role is crucial in shaping strategic product modules, particularly the payroll calculation engine. The ideal candidate will possess a strong technical foundation and More ❯

Backend Developer (Java/SpringBoot or similar – Outside IR35) Location: Remote/Hybrid (flexible) Contract Type: Freelance/Full-time – Outside IR35 Project Duration: 6+ months (with possibility of extension) About the Project We’re lookingfor a skilled backend developer to join a project focusedon building and scaling a modern, cloud-based platform for media processing … and related services. The core backend stack is Java with Spring Boot, PostgreSQL, Redis, AWS, and RabbitMQ — but we’re open to candidates with equivalent experience in similar technologies. Tech Stack (actual or equivalent experience welcomed): Languages & Frameworks: Java with Spring Boot 3.x (REST APIs, gRPC, Security, JPA) Alternatively: Java EE, or Scala Databases: PostgreSQL or any relational DB … MapStruct (or similar mapping frameworks) TUS protocol (for resumable file uploads) Media Handling (Nice to Have): Experience with video/audio manipulation (e.g., FFmpeg, GStreamer) Desired Skills & Experience: Strong backend development experience with Java or Scala Solid understanding of RESTful services, microservices, and gRPC Experience with relational databases and asynchronous communication Comfortable working in Linux/Ubuntu environments Proficient More ❯

Backend Developer (Java/SpringBoot or similar – Outside IR35) Location: Remote/Hybrid (flexible) Contract Type: Freelance/Full-time – Outside IR35 Project Duration: 6+ months (with possibility of extension) About the Project We’re lookingfor a skilled backend developer to join a project focusedon building and scaling a modern, cloud-based platform for media processing … and related services. The core backend stack is Java with Spring Boot, PostgreSQL, Redis, AWS, and RabbitMQ — but we’re open to candidates with equivalent experience in similar technologies. Tech Stack (actual or equivalent experience welcomed): Languages & Frameworks: Java with Spring Boot 3.x (REST APIs, gRPC, Security, JPA) Alternatively: Java EE, or Scala Databases: PostgreSQL or any relational DB … MapStruct (or similar mapping frameworks) TUS protocol (for resumable file uploads) Media Handling (Nice to Have): Experience with video/audio manipulation (e.g., FFmpeg, GStreamer) Desired Skills & Experience: Strong backend development experience with Java or Scala Solid understanding of RESTful services, microservices, and gRPC Experience with relational databases and asynchronous communication Comfortable working in Linux/Ubuntu environments Proficient More ❯

Are you a Back End Java Developer with experience within the iGaming and Gambling sector looking for a new and exciting challenge? BENEFITS : up to £95k depending on experience, fully remote, excellent benefits packageYou will be joining a rapidly expanding company within the iGaming sector, who are committed to providing top-tier gaming experiences to players around the world. … recognised among the top brands within our market, blending sports betting and online casino entertainment on a cutting-edge, custom-built platform. You will be a skilled Senior Java Backend Developer who is a self-motivated professional with a strong track record and a passion for excellence. You'll play a key role in developing innovative iGaming products … Your contributions will help deliver high-quality applications and services, reinforcing the company’s position as an industry leader. Core Responsibilities Work closely with the team to implement complex backend logic and platform solutions. Write clean, scalable, and maintainable code, adhering to industry best practices. Stay updated on the latest Java frameworks, libraries, and development techniques. Translate business needs More ❯

a global impact, and ready 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 deploying state-of-the-art computer vision models. Your key responsibilities will include: Designing, building … essential functionalities. Collaborating closely with 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 frameworks like FastAPI or Django. More ❯

a global impact, and ready 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 deploying state-of-the-art computer vision models. Your key responsibilities will include: Designing, building … essential functionalities. Collaborating closely with 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 frameworks like FastAPI or Django. More ❯

Lead Backend Developer/Software Engineer (Python Java AWS) London/WFH to £115k Are you a backend focussed software developer with leadership skills You could be progressing your career at a scale-up tech company (established 10 years), that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining … processes and delivering CO2 carbon neutral targets. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks.As a Lead Backend Developer you'll head up a team of 4-5 within an Agile environment to design and develop, troubleshoot and solve complex software issues to help scale and future proof … the business. You'll focus on backend Python and Java engineering on AWS but there's a range of other tech in the stack (JavaScript, Vue.js, TypeScript and of course a bit of legacy PHP!), you'll be encouraged to explore new technologies and use the best tool for the job. There's an emphasis on getting stuff done More ❯

Backend Developer (Node.js) remote (UK only) Overview Our client's technology powers thousands of retail websites, providing tools to help clients retain users and gain valuable analytical insights. They are seeking a talented Node.js Backend Developer with a strong background in serverless architecture, MySQL, distributed systems, infrastructure as code, and extensive AWS experience. As a key … member of their development team, you will be responsible for building and maintaining high-performance, scalable backend systems. Your role will include designing, developing, and maintaining cutting-edge backend solutions, as well as mentoring junior developers. Responsibilities Design and implement serverless backend solutions using Node.js, MySQL, and AWS technologies. Develop and maintain APIs and microservices to support … various applications. Collaborate with cross-functional teams to gather requirements and propose effective solutions. Stay updated with emerging technologies and trends in backend development and AWS services. Document technical specifications, architectural decisions, and codebase to ensure knowledge sharing and system reliability. Optimise database schemas, queries, and indexes for efficient data storage and retrieval. Implement caching strategies to enhance system More ❯

Back-End Developer (Braze CRM Mandatory) Job Description We are seeking a skilled and reliable Back-End Developer with hands-on experience in Braze CRM to join our dynamic team. The role requires a backend-focused developer confident in navigating service-oriented architecture and solving medium-sized engineering problems while collaborating with teams across product, marketing … and operations. This is a remote position based anywhere in the UK. Responsibilities Design and implement robust backend services and microservices to support CRM functionality and campaign logic using languages such as Python or Golang. Develop and maintain integrations between Braze and internal platforms. Support the build and optimisation of campaign templates using tools like JSON, Liquid, Handlebars, MJML. … Contribute to code reviews, release cycles, and team ceremonies. Document services, features, and decisions to support long-term maintainability. Diagnose and resolve performance issues across CRM campaigns and related backend services. Support QA and deployment processes to ensure defect-free CRM experiences. Essential Skills 4+ years of backend development experience. Strong development skills in coding languages such as More ❯

Backend Developer/Software Engineer (Java 17 Kotlin AWS) London/WFH to £85k Are you a technologist Backend Developer with strong Java skills looking to progress your career, working with a modern cloud based infrastructure and a range of technology? You could be joining a hugely successful and growing commodities trading firm that specialise in … trading silver and gold. As a Backend Developer you'll collaborate with the Lead Engineer on the whiskey trading platform as the company looks to scale the platform and introduce new features. There's an emphasis on code quality; designing and developing highly complex web based trading platforms working across the full development lifecycle. The technology stack includes … Kubernetes, Docker and Linux so previous exposure to any of these would be beneficial You're collaborative with good communication skills What's in it for you: As a Backend Developer/Software Engineer you will earn: Salary to £85k Bonus Hybrid working (x3 days in London per week) Learning and career development opportunities Apply now to find More ❯

Backend Developer/Software Engineer (Java 17 Kotlin AWS) London/WFH to £85k Are you a technologist Backend Developer with strong Java skills looking to progress your career, working with a modern cloud based infrastructure and a range of technology? You could be joining a hugely successful and growing commodities trading firm that specialise in … trading silver and gold. As a Backend Developer you'll collaborate with the Lead Engineer on the whiskey trading platform as the company looks to scale the platform and introduce new features. There's an emphasis on code quality; designing and developing highly complex web based trading platforms working across the full development lifecycle. The technology stack includes … Kubernetes, Docker and Linux so previous exposure to any of these would be beneficial You're collaborative with good communication skills What's in it for you: As a Backend Developer/Software Engineer you will earn: Salary to £85k Bonus Hybrid working (x3 days in London per week) Learning and career development opportunities Apply now to find More ❯

x6 PHP Software Engineers/Backend Developers – PHP/Symfony/Restful API - Fintech start-up based in the UK Areti has exclusively partnered with a Fintech start-up urgently seeking x6 PHP Software Engineers/Backend Developers for a Fintech start-up based in the UK. (FULLY REMOTE) My client has just received funding and looking to … in one of the most talented software engineering teams around and will offer the chance to move into a tech lead position very quickly. If you are a talented developer looking for a company that offers fully remote working, then please send your cv to me today. I have interview slots already pre-booked so suitable candidates will be More ❯

x6 PHP Software Engineers/Backend Developers – PHP/Symfony/Restful API - Fintech start-up based in the UK Areti has exclusively partnered with a Fintech start-up urgently seeking x6 PHP Software Engineers/Backend Developers for a Fintech start-up based in the UK. (FULLY REMOTE) My client has just received funding and looking to … in one of the most talented software engineering teams around and will offer the chance to move into a tech lead position very quickly. If you are a talented developer looking for a company that offers fully remote working, then please send your cv to me today. I have interview slots already pre-booked so suitable candidates will be More ❯

a mission to make investing 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 who are keen to learn More ❯

a mission to make investing 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 who are keen to learn More ❯

strong traction across financial services, 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 architecture, own features end-to-end, and putting your stamp on architectural decisions that drive More ❯

strong traction across financial services, 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 architecture, own features end-to-end, and putting your stamp on architectural decisions that drive More ❯