1627 Developer jobs in London

Role: Back End Engineer (Python)

Location: London (Hybrid)

Inara are excited to be partnered with 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 safeguards and monitoring.
• Helping the team get the most from AI-assisted development.
• Partnering with product, data, and platform teams to deliver impactful features.

You will need:

• Solid Python skills and confidence working with APIs and databases.
• Hands-on experience with integrations (APIs, file transfers, webhooks).
• Familiarity with workflow orchestration tools (e.g. Temporal, Dagster).
• Comfortable working with AI-driven coding tools and automated code generation.
• Knowledge of CI/CD pipelines, containerisation (Docker), and 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.

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, reliable services that protect users in real time.

What you’ll do

• Design, develop and secure RESTful APIs and serverless microservices (AWS).
• Optimise data access across MySQL/RDS and NoSQL (DynamoDB); write efficient queries.
• Automate deployments (CI/CD), add observability, and ship with high quality.
• Collaborate on architecture, testing and documentation; contribute across the full lifecycle.

What you’ll bring

• 3+ years’ commercial Node.js engineering.
• Hands-on AWS Serverless (Lambda, API Gateway, CloudWatch) and microservices.
• Experience with AWS Amplify.
• Strong API security (OAuth/JWT) and SQL/MySQL query optimisation.
• Version control with Git and modern team workflows.

Why apply

• Up to £80k base + share options.
• 25 days’ holiday + bank holidays & your birthday off.
• Private healthcare (24/7 GP & mental health), pension, eye-care support.
• Fully remote (UK); learn from senior engineers; clear growth path.

If you enjoy solving real-world problems, want to work with modern tech, and like the idea of being part of a mission-driven team, this could be the role for you.

Click "Apply" now or reach out to to discuss the role in more detail.

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 practices - I wouldn't put that in search string however look out for the tech stack
• NLP & agent-based frameworks – knowledge of LangGraph, PydanticAI, AutoGen, etc.

Please apply to the advert for more information.

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 a problem solving.
• It requires getting to know the client’s needs, the company’s platform features and technologies from the ground up.

Experience needed as a Back End Developer:

• 3+ years of Node.js development
• Type Script/Strong JavaScript skills
• React
• REST API development
• SQL
• Git

Backend Software Engineer

Location: London (5 days per week, on-site)

Seniority: Mid-level (3–8 years’ experience)

About the Role

We’re looking for a talented Backend Software Engineer to join our London-based platform team. You’ll play a pivotal role in designing, building, and maintaining robust backend systems, with a strong focus on infrastructure and database design. This is a hands-on role where you’ll work closely with engineers to deliver high-quality, scalable solutions that drive our platform forward.

What You’ll Do

• Collaborate with the London-based platform team on new features and infrastructure improvements.
• Take ownership of backend systems, ensuring reliability, scalability, and security.
• Contribute to backend engineering tasks, working primarily with Python and SQL .
• Design and optimize infrastructure and databases for performance and resilience.
• Leverage your experience with TypeScript and optionally lower-level languages such as C or Rust .
• Bring curiosity and a passion for learning to continuously improve both yourself and the platform.

Tech Stack

• Primary: Python, SQL, TypeScript
• Additional: C, Rust

What We’re Looking For

• 3–8 years of backend software engineering experience.
• Deep knowledge of Python , SQL , and TypeScript .
• Strong background in infrastructure and database design .
• Proven experience working in startups or fast-paced environments.
• Bonus points for:
• Experience with lower-level languages (C, Rust )
• Demonstrated expertise in another field (showing passion and drive, even outside engineering).

Soft Skills

• Excellent communication skills, with the ability to clearly explain technical issues and reasoning.
• A growth mindset with a genuine passion for continuous learning.

Traits to Avoid

• This is not a Data/ML engineering role — we’re looking for backend engineers with strong infrastructure and systems experience.

Energy & Commodity Desk Software Developer - 3 days onsite - London - Contract inside IR35 - Day rate £650-£725

6 months rolling

My client is seeking an experienced Front Office Developer with a background working in Energy trading environments to provide flexible, scalable and tailored software applications.

The main clients will be trading, sales and structuring teams but you will also interact with middle and back office.

Main duties:

• Gather user requirements and defining specifications
• Develop, implement and deliver solutions
• Support, Bug fix & Document

Required experience

• .Net platform, C# language, WPF, angular
• Usual architectural pattern
• Energy Trading business (oil, gas, power), commodities also welcome (metals)

Energy & Commodity Desk Software Developer - 3 days onsite - London - Contract inside IR35 - Day rate £650-£725

6 months rolling

My client is seeking an experienced Front Office Developer with a background working in Energy trading environments to provide flexible, scalable and tailored software applications.

The main clients will be trading, sales and structuring teams but you will also interact with middle and back office.

Main duties:

• Gather user requirements and defining specifications
• Develop, implement and deliver solutions
• Support, Bug fix & Document

Required experience

• .Net platform, C# language, WPF, angular
• Usual architectural pattern
• Energy Trading business (oil, gas, power), commodities also welcome (metals)

Game Frontend Developer

About the Role

We are seeking a passionate Game Frontend Developer to join our development team. You will be responsible for implementing user interfaces, gameplay interactions, and visual effects, turning creative designs into engaging player experiences across multiple platforms.

Key Responsibilities

• Develop and maintain game frontend features using engines or frameworks such as Unity, Unreal, Cocos, or HTML5.
• Implement UI/UX designs including login screens, main menus, inventory, in-game shops, quests, and HUD elements.
• Optimize client performance to ensure smooth gameplay on PC, mobile, and web platforms.
• Collaborate with backend developers to integrate APIs and manage data interactions.
• Create engaging animations and effects for UI transitions, skills, and reward systems.
• Write clean, maintainable code with proper documentation, testing, and debugging.
• Iterate on features and user experience based on QA testing and player feedback.

Requirements

• Proficiency in JavaScript/TypeScript and at least one modern framework (React, Vue, or Angular).
• Experience with Unity (C#), Unreal Engine (C++/Blueprints), or Cocos Creator is a strong plus.
• Strong knowledge of HTML5, CSS3, Canvas, and WebGL for implementing complex UI and animations.
• Understanding of frontend architecture patterns (MVC, MVVM) and best coding practices.
• Familiarity with RESTful APIs and WebSocket for client-server communication.
• Hands-on experience with performance optimization (memory management, frame rate, asset loading).
• Passion for games and a keen eye for player experience and usability.

Job Types: Full-time, Permanent

Pay: £40,000.00-£95,000.00 per year

Benefits:

• Free parking
• Sabbatical
• UK visa sponsorship

Work Location: In person

• Develop and implement high-quality, scalable, and performant front-end web applications using modern JavaScript frameworks (e.g., React, Angular, Vue.js).
• Translate UI/UX design wireframes and mockups into functional, responsive, and user-friendly web interfaces.
• Collaborate effectively with back-end developers to integrate front-end components with server-side logic.
• Optimize applications for maximum speed, scalability, and cross-browser compatibility.
• Write clean, well-documented, and testable code following best practices.
• Conduct code reviews and provide constructive feedback to other team members.
• Participate in architectural discussions and contribute to technical decision-making.
• Troubleshoot and debug issues, identifying and implementing effective solutions.
• Stay current with emerging front-end technologies and industry trends, advocating for their adoption where appropriate.
• Mentor junior developers and contribute to a culture of technical excellence.
• Ensure adherence to accessibility standards (e.g., WCAG) in all front-end development.

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Minimum of 5 years of professional experience in front-end development.
• Proficiency in HTML5, CSS3, and JavaScript (ES6+).
• Extensive experience with at least one modern JavaScript framework (React, Angular, or Vue.js).
• Strong understanding of state management, component-based architecture, and build tools (e.g., Webpack, Babel).
• Experience with RESTful APIs and asynchronous request handling.
• Familiarity with version control systems, particularly Git.
• Knowledge of testing frameworks (e.g., Jest, Mocha, Cypress) and practices.
• Excellent problem-solving, debugging, and analytical skills.
• Strong communication and collaboration abilities.
• Experience with UI/UX principles and design patterns is a plus.
• Familiarity with server-side rendering (SSR) or static site generation (SSG) is beneficial.