Backend developer jobs in Welwyn Garden City - Page 8Create job alerts

Romsey, Hampshire (Hybrid - 3 days office / 2 remote, flexible).My client build innovative SaaS solutions that help organisations monitor, manage, and optimise critical infrastructure.Following recent growth and their migration to AWS, they're investing heavily in modernising their platform and buil

Compensation: Competitive, based on location and experience .Location: UK or Turkey (Hybrid – Office & Remote).Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale.Keepnet runs

A leading audio streaming service in London seeks a Backend Developer to enhance software development processes. The ideal candidate will have experience in backend development, strong coding skills, and a passion for learning new technologies, especially AI-related tools.

Backend WordPress Developer (Remote - UK Only). We’re looking for a skilled and motivated Backend Developer to join our growing team at Zap. Researching and implementing innovative ways to improve our backend capabilities across client websites.

We're seeking Senior Python Developers to join our back-end development team.

A Senior Backend Developer (Ruby on Rails) is responsible for designing, developing, and testing server-side logic for web applications using Ruby and the Ruby on Rails framework. Minimum of 8 years of experience as a Backend Developer, including 3+ years of hands‑on experience with Ruby. Lead and

A leading technology company in the United Kingdom is seeking a backend developer to design and maintain services using C# and cloud technologies.

We’re searching for an experienced backend developer who loves working in a modern startup environment. We are searching for a Senior Python Engineer to join our fast-growing cyber security startup on our backend team.

Backend Software Developer (Python) - London - £90,000 + Comps. We’re looking for a Backend Developer who thrives in dynamic environments — someone who loves clean code, scalable architecture, and being part of a team that’s pushing boundaries. Design, build, and optimize high-performance bac

A tech solutions company is looking for a Full Stack Web Developer in the UK. The candidate will manage backend systems, develop eCommerce solutions, and collaborate with frontend teams. Strong skills in backend technologies, database management, and system integrations are essential.

This role combines backend engineering excellence with deep familiarity in modern data systems. Build and maintain core data infrastructure and backend services used across R&D. Experience in distributed systems and enterprise-scale backend development.

A modern tech firm is seeking a proactive PHP Developer Intern to join their development team in Greater London. This role offers a fantastic opportunity to gain real-world experience in backend and web application development using PHP. Interns will collaborate with experienced developers on live p

An exciting opportunity is on offer for a Java Developer (Backend) to work for a global technology business. Java Developer - Desktop / Oracle / SQL / Backend / Unit testing. The chosen Java Developer will be working with a talented team of engineers and testers.

You will be involved in both backend and frontend development, building applications and enhancing user interfaces. A leading educational SaaS provider based in Bristol is looking for an experienced PHP Developer to join their growing team on a hybrid basis.

We are looking for an awesome Senior Java Backend Developer to join our growing team.

We are looking for an awesome Senior Java Backend Developer to join our growing team.

Back-End developer (python and GCP) - £525 inside IR35.

Canonical is a leading provider of open source software and operating systems to the global enterprise and technology markets.Our platform, Ubuntu, is widely used in breakthrough enterprise initiatives such as public cloud, data science, AI, engineering innovation, and IoT.Our customers include the

A dynamic tech company in the UK seeks a Mid-Senior Backend WordPress Developer for a fully remote role.

Backend Developer Web3 - London / Remote. An exciting and well-backed decentralised Crypto project is seeking to bring in an experienced and proven Backend Developer with skills in Solidity, and ideally Golang. The Senior Backend Developer will join a team of experienced and proven Blockchain expert

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, performance-driven backend engineering, and have experience working in sports betting or complex, event-based sy

We are looking for a dedicated BackEnd Technical Support Developer to help handle production issues. BackEnd Technical Support Developer. What we’re looking for from a Back End Developer:.

As a Senior Backend Developer, you will be part of the team that develops the backend components of all Bitfinex services (main trading application, Lightning Network support, Blockchain integrations, etc. Senior Backend Developer - Node. Scalability: ensure backend services remain smooth, responsiv

We’re seeking a seasoned Backend Developer with a proven track record in building scalable and robust architectures, and an instinctive understanding of how to deliver seamless digital experiences. You will work closely with the game team and technical leads to create and explore new and exciting

S-RM is looking to recruit a skilled Backend Developer to focus on the development and scaling of a strategic cyber security application. As a Backend Developer, your primary responsibility will be to enhance, maintain, and support an existing application that is crucial to our service delivery. Col

A growing consulting business in the UK is seeking a talented Backend Python Developer to contribute to their AI-driven platform project. The ideal candidate will have strong experience in Python backend development and familiarity with cloud-native architectures.

Building a secure and performant backend solution. Significant experience with backend development and maintenance using Kotlin or Java. Independent, self-managed working with responsibility as part of a small team of top developers.

Senior Software Developer with a Backend Focus. To professionalise our product development and continue our growth path, we are currently looking for a senior backend developer. Senior backend skills with at least 5 years of experience with Java, and a good understanding of Python (FastAPI, Flask…

You will be responsible for implementing new product features, maintaining and writing database migration scripts, identifying and fixing bugs autonomously, and ensuring high-quality, reliable backend services across our platform. Develop, maintain, and optimize backend microservices powering the Fo

Independent, self-managed working with responsibility as part of a small team of top developers. Building a secure and performant backend solution on Kotlin. Significant experience with backend development and maintenance using Kotlin or Java.

A BAFTA-winning game studio is seeking an experienced Backend Developer to design and implement scalable microservices for a high-traffic digital platform. The role involves collaborating with technical teams to create robust backend services, utilizing technologies like Javascript, C#, and cloud pl

Develop and maintain backend features using Java, that provide the best developer experience possible including local development experience. Do you love being in the flow as a developer and want to enable that for everyone else as well? Do you believe that the key to personal flow is in making the

A global digital agency is seeking a Senior Backend Developer to create robust backend services for complex digital products.

At TripleTen, we’re creating innovative learning products that empower people to master IT professions like software engineering, data science, business intelligence, and QA — no matter their prior experience.Our AI-driven and thoughtfully designed platform helps students build real skills and a

We work at the intersection of finance and technology, helping institutions, startups, and developers navigate a digitally native economy.

You will work mainly on the backend of a key platform, utilizing Python and ideally C#. A Central London tech consultancy is seeking a Python Developer to join their growing team in a hybrid role.

This role involves designing, developing, and testing RESTful APIs and backend services. A leading financial services provider in Greater London seeks a Java API Developer to join their Digital Asset development team.

Developers are a core part of this process, taking full ownership of their software throughout its lifecycle—from design and development to testing, review, and production support.

Objectively restore stand-alone markets rather than enterprise-wide products.Uniquely underwhelm best-of-breed mindshare through adaptive niches.Seamlessly parallel task open-source content without resource sucking technology.Be involved in every step of the product design cycle from discovery and u

Java Backend Developer,November 30, 2025### Job Description**On behalf of our client, we are seeking a Java Backend Developer – London, UK (Full-Time Permanent Role). Our client, a fast-growing technology organisation, is looking for a skilled Java Backend Developer to build secure, scalable backe

We’re seeking Mid and Senior Python Developers to join our back-end development team.

Senior Backend Developer - UK Remote - Up to £75,000. A leading software company, renowned for its dynamic and ever-evolving nature, is seeking a Senior Backend Developer to join their team. As a Senior Backend Developer, the successful candidate will be at the forefront of developing and enhancing

A highly profitable hedge fund in London is seeking a Backend Software Engineer (C#.

Years of experience is a poor yard stick but likely 5-7+ years working on backend systems. Build and extend backend features using internal and third‑party APIs (e. Experience designing and scaling backend services.

Join blp – The #1 Solution for ERP Automation.ETH and HSG spin-off redefining ERP automation with AI.We solve real enterprise problems with cutting-edge tech and a strong sense of ownership.Our solution is in production across 40+ countries, used by 20,000+ daily active users, automating 70,000+ p

Mobile Backend Developer (JAVA/Kotlin). We have a great opportunity for a Mobile Backend Developer (JAVA/Kotlin) to join the team. Provide advanced technical expertise in Backend Development, supporting the team with effective solutions and practical insights.

Our favourite candidates are developers that follow best practices in any programming language, who use the best tool for the job and can adapt to a rapidly changing environment. You will have experience with using a modern programming language for backend development on a daily basis during a solid

We’re seeking a seasoned Backend Developer with a proven track record in building scalable and robust architectures, and an instinctive understanding of how to deliver seamless digital experiences. Solid understanding of computer science fundamentals (data structures, algorithms, networking) and a