10 of 10 Permanent Backend Developer Jobs in the City of London

Title: Node.js Backend Developer Salary: up to £80,000 + share options Location: Fully remote (UK) Sector: Cybersecurity SaaS We’re supporting a high-growth cyber SaaS scale-up on the hire of a Node.js Backend Developer to own production APIs and serverless microservices. You’ll work with senior engineers to design, build and operate secure More ❯

Job Title: BackEnd Technical Support Developer Location: London, UK Work Pattern: Hybrid – 3 days onsite, 2 working from home Salary: up to £50,000 per annum + on call bonus Job Position: Permanent Additional Info: This position does require you to be on call every 5th week (extra pay on top of your salary) We are looking for … a dedicated BackEnd Technical Support Developer to help handle production issues. This includes working with the company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this … is a great opportunity to learn and expand all those skills. What we’re looking for from a Back End Developer: The right candidate needs to be hungry to learn, a good problem solver and can prioritise what is important and get it done. It is very much a role that is a combination of a digital detection and More ❯

Job Title: BackEnd Technical Support Developer Location: London, UK Work Pattern: Hybrid – 3 days onsite, 2 working from home Salary: up to £50,000 per annum + on call bonus Job Position: Permanent Additional Info: This position does require you to be on call every 5th week (extra pay on top of your salary) We are looking for … a dedicated BackEnd Technical Support Developer to help handle production issues. This includes working with the company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this … is a great opportunity to learn and expand all those skills. What we’re looking for from a Back End Developer: The right candidate needs to be hungry to learn, a good problem solver and can prioritise what is important and get it done. It is very much a role that is a combination of a digital detection and More ❯

Backend Engineer - Gen AI Backend development – building and maintaining Python-based web applications. Generative AI & LLMs – understanding and working with large language models (LLM) and GenAI datasets. Also integrating ML into applications. Cloud infrastructure – experience with Google Cloud (Cloud Run preferred) and core web app infrastructure. DevOps tools – familiarity with Git/GitHub, CI/CD, and deployment More ❯

Backend Software Engineer Term: 6 Months Pay: £888 per day Inside IR35 Location: Kings Cross London Hybrid Our client see a world in which advanced applications of Machine Learning and AI will allow us to develop novel therapies to existing diseases and to quickly respond to emerging or changing diseases with personalized drugs, driving better outcomes at reduced cost … will be committed to your career and development from day one. Key responsibilities Back end development for a Python web application Integration of AI/ML components with frontend, backend, data and compute infrastructure Responsible for high quality software implementations according to best practices, including automated test suites and documentation Develop, measure, and monitor key metrics for all tools … technical staff and data engineers in the team and across allied teams, to build an end-to-end pipeline consuming other data products Basic qualifications: Demonstrated experience of Python backend development (e.g. using FastAPI) Bachelors degree in a relevant field (including computational, numerate or life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including More ❯

Backend Software Engineer Term: 6 Months Pay: £888 per day Inside IR35 Location: Kings Cross London Hybrid Our client see a world in which advanced applications of Machine Learning and AI will allow us to develop novel therapies to existing diseases and to quickly respond to emerging or changing diseases with personalized drugs, driving better outcomes at reduced cost … will be committed to your career and development from day one. Key responsibilities Back end development for a Python web application Integration of AI/ML components with frontend, backend, data and compute infrastructure Responsible for high quality software implementations according to best practices, including automated test suites and documentation Develop, measure, and monitor key metrics for all tools … technical staff and data engineers in the team and across allied teams, to build an end-to-end pipeline consuming other data products Basic qualifications: Demonstrated experience of Python backend development (e.g. using FastAPI) Bachelors degree in a relevant field (including computational, numerate or life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including More ❯

Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices 💵 £70,000–95,000 base salary + Bonus 📦 Flexible benefits budget | 90 day work-from-anywhere perk 💻 Python, FastAPI, PostgreSQL, DynamoDB, AWS, EKS 📍 Remote first or hybrid (London) InsurTech | Modern, high traffic, scalable microservices development We’ve partnered with a well known name in the insuretech space - one of … tech stack. Tech stack: Python (FastAPI) | gRPC | GraphQL | PostgreSQL | DynamoDB | AWS | EKS | CI/CD pipelines What you’ll be doing: ✅ Contributing to the design and development of scalable backend systems ✅ Working across rotating product squads with full domain exposure ✅ Deploying and owning your code in production (AWS EKS) ✅ Collaborating with product and engineering leads to solve complex problems … profitable, product-focused company with ambitions to scale in 2025. You’ll be surrounded by experienced engineers and given the tools to take ownership and grow your career. Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices More ❯

Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices 💵 £70,000–95,000 base salary + Bonus 📦 Flexible benefits budget | 90 day work-from-anywhere perk 💻 Python, FastAPI, PostgreSQL, DynamoDB, AWS, EKS 📍 Remote first or hybrid (London) InsurTech | Modern, high traffic, scalable microservices development We’ve partnered with a well known name in the insuretech space - one of … tech stack. Tech stack: Python (FastAPI) | gRPC | GraphQL | PostgreSQL | DynamoDB | AWS | EKS | CI/CD pipelines What you’ll be doing: ✅ Contributing to the design and development of scalable backend systems ✅ Working across rotating product squads with full domain exposure ✅ Deploying and owning your code in production (AWS EKS) ✅ Collaborating with product and engineering leads to solve complex problems … profitable, product-focused company with ambitions to scale in 2025. You’ll be surrounded by experienced engineers and given the tools to take ownership and grow your career. Senior Backend Software Engineer (multiple vacancies) – Python | FastAPI | AWS | Microservices More ❯

a pioneering AI ScaleUp, where they have built a platform that uses AI to transform how organisations tackle inefficiencies and scale their operations. Now we’re looking for a Backend & Integrations Engineer to help us bring that vision to life. This isn’t just another backend role, you’ll be hands-on with Python, APIs, and system integrations … while also championing the use of AI tools in day-to-day engineering. Think of it as coding meets next-gen automation. The role will be: Designing and refining backend services that power our SaaS apps. Developing integrations with external APIs and systems. Taking automation-generated code and making it production-ready. Embedding AI capabilities into workflows with strong … cloud platforms (AWS/Azure/GCP). A curious mindset and enthusiasm for raising the team’s AI skills. If you’re excited by the idea of blending backend engineering with AI-powered development, we’d love to hear from you. More ❯

a pioneering AI ScaleUp, where they have built a platform that uses AI to transform how organisations tackle inefficiencies and scale their operations. Now we’re looking for a Backend & Integrations Engineer to help us bring that vision to life. This isn’t just another backend role, you’ll be hands-on with Python, APIs, and system integrations … while also championing the use of AI tools in day-to-day engineering. Think of it as coding meets next-gen automation. The role will be: Designing and refining backend services that power our SaaS apps. Developing integrations with external APIs and systems. Taking automation-generated code and making it production-ready. Embedding AI capabilities into workflows with strong … cloud platforms (AWS/Azure/GCP). A curious mindset and enthusiasm for raising the team’s AI skills. If you’re excited by the idea of blending backend engineering with AI-powered development, we’d love to hear from you. More ❯