1 to 25 of 34 Permanent Backend Developer Jobs in London

Senior Python Backend Developer - Python, AWS, Django Central London/Hybrid -one day in the office £75-85k + benefits Were seeking a topflight Senior Python Backend Developer with a strong software engineering background including 8-9+ years majoring in writing Backend applications using Python and Django (Rest Framework). This is a … seriously weighty, complex, technically challenging role; the successful Backend Developer will be 'red hot' on the core backend skill requirements. Demonstrably the 'go to' person in your role. The Python Backend Developer will be joining a team of 45 at a world-class healthcare scaleup. With each integration of a new hospital group there is … Proactively respond to analytics to ensure our products are robust and meet users needs Take technical ownership of areas of product Required: 8-9+ years of experience writing Backend applications using Python and Django (Rest Framework) or related frameworks, e.g. Flask, FastAPI or similar Good understanding of ORM (either Django or SQLAlchemy) Good understanding of Python Unit Testing More ❯

Senior Backend Developer - Python, AWS, Django Central London/Hybrid -one day in the office £75-85k + benefits Were seeking a topflight Senior Backend Developer with a strong software engineering background including 8-9+ years majoring in writing Backend applications using Python and Django (Rest Framework). This is a seriously weighty … complex, technically challenging role; the successful Backend Developer will be 'red hot' on the core backend skill requirements. Demonstrably the 'go to' person in your role. The Backend Python Developer will be joining a team of 45 at a world-class healthcare scaleup. With each integration of a new hospital group there is an acceleration … Proactively respond to analytics to ensure our products are robust and meet users needs Take technical ownership of areas of product Required: 8-9+ years of experience writing Backend applications using Python and Django (Rest Framework) or related frameworks, e.g. Flask, FastAPI or similar Good understanding of ORM (either Django or SQLAlchemy) Good understanding of Python Unit Testing More ❯

humanity and collaboration, encourage professional and personal growth, and foster a supportive and flexible work environment where everyone's contribution is welcomed. Now we are looking for a Senior Backend Developer to join us as part of our team. About the role You will be working in a team that combines investment expertise with advanced technology solutions. We … build products where data security is a top priority, and we are looking for a strong backend developer with experience in information security and SOC 2 compliance. As a qualified expert, You will Develop backend applications using Node.js + TypeScript Design secure system architectures Implement solutions that meet SOC 2 and other security standards Work with PostgreSQL More ❯

Lead Backend Developer Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an … ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of … decisions. This is a high-impact role where your work directly drives product growth, system resilience, and platform evolution. What will I be doing: Design, develop, and optimise scalable backend services in Python, leveraging FastAPI. Lead architectural discussions with a focus on performance, scalability, and reliability. Deliver complex features end-to-end - from design through deployment and monitoring. Provide More ❯

Title: 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 Backend Developer to own production APIs and serverless microservices. You'll work with senior engineers to design, build and operate secure, reliable services More ❯

Are you an experienced backend engineer with a deep background in FinTech, ready to architect a new payments platform from the ground up? We are representing a well-funded FinTech startup seeking a foundational Lead Backend Engineer. This is a unique greenfield opportunity to be the technical authority, making key architectural decisions that will shape the future of … corporations. They are building the nucleus of a product ecosystem that will redefine FinTech for SMEs in the UK and beyond. What You'll Be Doing As the Lead Backend Engineer, you will be the cornerstone of a new development team. You will: Lead the Architecture: Design and develop the core backend of the payment platform, including the … API gateway, transaction management layer, and merchant services. Mentor & Guide: Act as a technical mentor to another backend developer, fostering a culture of high-quality engineering and collaborative growth. Own Security & Compliance: Take the lead on implementing robust security measures (e.g., AES-256 encryption, OAuth/JWT) and ensuring the platform is compliant with PCI-DSS and GDPR. More ❯

Are you an experienced backend engineer with a deep background in FinTech, ready to architect a new payments platform from the ground up? We are representing a well-funded FinTech startup seeking a foundational Lead Backend Engineer. This is a unique greenfield opportunity to be the technical authority, making key architectural decisions that will shape the future of … corporations. They are building the nucleus of a product ecosystem that will redefine FinTech for SMEs in the UK and beyond. What You'll Be Doing As the Lead Backend Engineer, you will be the cornerstone of a new development team. You will: Lead the Architecture: Design and develop the core backend of the payment platform, including the … API gateway, transaction management layer, and merchant services. Mentor & Guide: Act as a technical mentor to another backend developer, fostering a culture of high-quality engineering and collaborative growth. Own Security & Compliance: Take the lead on implementing robust security measures (e.g., AES-256 encryption, OAuth/JWT) and ensuring the platform is compliant with PCI-DSS and GDPR. More ❯

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 ❯

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 ❯

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 ❯

Senior Backend Developer (PHP/Laravel ) - Orpington Hyb rid | Orpington Full-Time | Salary £60,000 - £75,000 Join a fast-growing tech company disrupting the entertainment space. Our client is building a platform that delivers subscription-based services to consumers, and they need a backend wizard to help them scale. Your Role Build fast, scalable systems with More ❯

Node Developer Remote Working Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Responsibilities : Design, implement, and manage backend applications and APIs using Node.js Work with RESTful APIs and external More ❯

Node Developer Remote Working Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Responsibilities : Design, implement, and manage backend applications and APIs using Node click apply for full job details More ❯

roles where your newly learned skills can be applied meaning a vast array of opportunities are now available to you. Examples of some of these are listed below: - Junior Developer Website Support Developer Junior Web Developer Content Editor Wordpress Developer Junior Software Developer Junior Front or Back End Development Development Support We have been helping 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 ❯

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 ❯

Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (Global) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? ?? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised … by Gartner, armed with $29M+ in funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer , youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures … before attackers do. What youll be doing: Designing and building backend services and data pipelines powering a cutting-edge cybersecurity platform Architecting scalable microservices and APIs to process massive volumes of security data Working closely with product and frontend teams to integrate backend services into the platform experience Continuously improving systems performance, deployment, and monitoring as the company 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 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 ❯

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 ❯

further and allow the company to help even more job seekers save time by automating job applications and building tools they love using. Job description We’re hiring a backend developer to join our Auto-Apply team. This team is building a system that automatically finds the best jobs for users, fills out applications on their behalf, and … dashboard. Build and maintain automation for job application flows across multiple ATS systems Add new integrations so we can support more users and more job platforms Work on the backend services that power job search, matching, and application submission Collaborate closely with the frontend and product teams to deliver fast, reliable user experiences Write clean, maintainable code and contribute … to system design discussions Help improve the performance and scalability of our job search and application engine Our Stack Auto-Apply: Playwright, Python, FastAPI, Meilisearch Main web backend: Laravel (PHP), Vue.js Requirements Strong backend development skills (Python or PHP experience preferred) Comfortable working with APIs, integrations, and external systems Familiarity with Playwright or browser automation is a big More ❯