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About the Project Outlier helps the world's most innovative companies improve their AI agents by providing human feedback. Do you want to shape the future of autonomous agents like OpenClaw? We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to design, coordinate, and optimize complex, real-world architectural workflows. Whether you are a passionate orchestration guru or experienced software developer — we want you to help us train the world's most advanced generative systems. Ideal Qualifications • 2+ years of experience in backend engineering, AI automation, or complex systems integration., • Proven ability to build and maintain production-grade software with modular separation (e.g., distinct services for data parsing, logic processing, and reporting)., • Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases., • Practical experience building for live, non-mocked environments and handling multi-turn system interactions., • Expertise building multi-stage coordination tasks where data acquisition leads to reasoned output., • Hands-on experience integrating agents with live tools such as Supabase, Gmail, and various APIs to solve real-world problems., • High level of comfort implementing persistent state and session discovery using MEMORY.md to track agent progress., • Experience identifying subtle failures like privacy leaks, authority escalation, or indirect prompt injections.

About the Project Outlier helps the world's most innovative companies improve their AI agents by providing human feedback. Do you want to shape the future of autonomous agents like OpenClaw? We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to design, coordinate, and optimize complex, real-world architectural workflows. Whether you are a passionate orchestration guru or experienced software developer — we want you to help us train the world's most advanced generative systems. Ideal Qualifications • 2+ years of experience in backend engineering, AI automation, or complex systems integration., • Proven ability to build and maintain production-grade software with modular separation (e.g., distinct services for data parsing, logic processing, and reporting)., • Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases., • Practical experience building for live, non-mocked environments and handling multi-turn system interactions., • Expertise building multi-stage coordination tasks where data acquisition leads to reasoned output., • Hands-on experience integrating agents with live tools such as Supabase, Gmail, and various APIs to solve real-world problems., • High level of comfort implementing persistent state and session discovery using MEMORY.md to track agent progress., • Experience identifying subtle failures like privacy leaks, authority escalation, or indirect prompt injections.

About the Project \n Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. Do you want to shape the future of autonomous agents like OpenClaw? \n We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how to design, coordinate, and optimize complex, real-world architectural workflows. \n Whether you are a passionate orchestration guru or experienced software developer — we want you to help us train the world's most advanced generative systems. \n \n Ideal Qualifications \n\n • 2+ years of experience in backend engineering, AI automation, or complex systems integration.\n, • Proven ability to build and maintain production-grade software with modular separation (e.g., distinct services for data parsing, logic processing, and reporting).\n, • Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases.\n, • Practical experience building for live, non-mocked environments and handling multi-turn system interactions.\n, • Outstanding attention to detail and the ability to provide clear, high-density technical feedback on complex system behaviors.\n\n \n Nice to have \n\n • Expertise building multi-stage coordination tasks where data acquisition leads to reasoned output.\n, • Hands-on experience integrating agents with live tools such as Supabase, Gmail, and various APIs to solve real-world problems.\n, • High level of comfort implementing persistent state and session discovery using MEMORY.md to track agent progress.\n, • Experience identifying subtle failures like privacy leaks, authority escalation, or indirect prompt injections.\n\n

Full Stack Developer (C# / React / Azure) Location: Coventry - Hybrid (2 days onsite per week) Salary: £60,000 - £70,000 Eligibility: Must be based in the UK - no visa sponsorship available About the Company Join a fast-moving digital team that's modernising enterprise systems and building next-generation web platforms from the ground up. This is a great opportunity to work on meaningful software projects, shape architecture decisions, and collaborate with a highly skilled engineering group in an environment that encourages innovation and autonomy. The Role You'll be responsible for designing, developing, and deploying robust full-stack applications across cloud-based and containerised environments. From building APIs and crafting modern frontends to streamlining DevOps processes, you'll play a hands-on role in delivering reliable, scalable solutions that support business growth. What You'll Do: Build, test, and deploy high-quality software and services Contribute to architectural design and planning discussions Implement clean, maintainable code with strong documentation Work with DevOps pipelines and modern CI/CD tools Develop and maintain RESTful APIs and web applications Support continuous improvement by researching new tools and methods Core Tech Stack: Backend: C#, .NET Core, REST APIs Frontend: ReactJS, JavaScript, Blazor, HTML, CSS Cloud & DevOps: Azure, Azure DevOps, GIT Database: PostgreSQL / SQL Containerisation: Docker, Kubernetes (nice to have) What You'll Bring: Proven full-stack experience with C# and modern JavaScript frameworks Hands-on experience with cloud-based deployments (Azure preferred) Familiarity with CI/CD pipelines and version control (Git, Azure DevOps) Solid understanding of microservices and containerisation Knowledge of authentication and integration tools (OAuth, JWT) Excellent communication and problem-solving skills Bonus Skills: Kafka, RabbitMQ, or Azure Service Bus Database admin or optimisation experience Previous work on customer-facing web platforms Why You'll Love It Here: Hybrid work pattern - only 2 days per week onsite in Coventry A genuinely collaborative, fast-paced team culture The chance to take ownership of technical direction and architecture Competitive salary between £60,000 and £70,000 Sound like you? If you're a hands-on C# Developer with a passion for building scalable, modern applications, we'd love to hear from you. Apply now or get in touch for a confidential chat

Compensation: Competitive, based on location and experience .Location: UK (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 autonomous

The successful candidate will take ownership of core backend services, enhancing developer experience through well-designed APIs and reliable infrastructure.

Collaborate with analysts, testers, architects, and fellow developers to deliver quality outcomes. Design, develop, and maintain backend applications using Java/JEE and related frameworks. Build backend components and services using Java‑based frameworks and languages.

Onyx-Conseil is seeking a Java Developer – Backend to join their team in Greater London.

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

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

Holisticly communicate integrated channels via backend interfaces.

Collaborate regularly in a cross-functional team made up of product managers, quality assurance teams, designers and other developers to translate business requirements into technical solutions. Collaborate with Front-end developers to integrate user-facing elements with server-side logic. Stay upda

Python Backend Developer Engineer AWS Lambda London. A leading IT Consultancy is seeking a Python Backend Developer Engineer AWS Lambda on a contract basis. The Python Backend Developer Engineer AWS will have experience in.

YO IT Consulting is seeking a Java Developer - AI Expert for a part-time remote role. You will design, implement, and improve backend APIs while collaborating with AI research teams. The ideal candidate has 3+ years of backend experience and strong Java expertise.

NET Developer (Azure) based in Sheffield to join a small engineering team. This role involves designing and implementing backend services using modern Microsoft technologies in a cloud-first environment.

We're looking for a Backend Developer to build and maintain our platform infrastructure.

Senior Backend Java Developer – London.

Senior Typescript & AI Backend Developer. Emergn you will design and build intelligent backend systems and AI orchestration solutions, integrating enterprise platforms like SAP to deliver scalable, automated end-to-end processes for our clients. Design and develop robust TypeScript backend systems t

We are seeking a Backend Java Developer to design and deliver high‑quality applications using Java/JEE and modern web technologies. Design, develop, and maintain backend applications using Java/JEE and related frameworks. Build backend components and services using Java‑based frameworks and lang

Information Tech Consultants is seeking a skilled Java Developer to join their onsite team in London, United Kingdom. The ideal candidate will have strong backend development experience with modern Java technologies such as Spring Boot and Hibernate.

As a senior Backend Developer, you will be a part of the team that works on the development and maintenance of the backend components of multiple services related to the platform. The Backend Development team is responsible for building all the API services and backend processes with the highest sec

Strong commercial experience as a Backend Developer (you can also have worked in a full stack role if you are particularly backend focussed). Mid-Level Backend Developer | C#,. They’re looking to add a couple of Mid-Level Backend Developers to one of their core product teams.

Contributing across backend, frontend, and cloud infrastructure depending on your strengths.

As a Backend Developer (Kotlin/Java) at CIMAR, you will:. Build and support backend services in Kotlin to support a web UI and a set of remote gateways. Contribute to pragmatic architectural decisions and help shape backend patterns and standards.

The documentation engineering team is responsible for creating world‑class developer tools and framework‑level support for the documentation workflows on the developer website and Xcode. We’re looking for a software engineer to join the backend team and continue to scale and improve our existi

We are now expanding our team and are looking for skilled, goal-oriented backend developers to join our teams. Design backend services using Python and modern cloud‑native architecture.

We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure. The team brings together strong backend, frontend, product, and busi

If your idea of backend engineering is more than CRUD APIs and microservices boilerplate — this role is for you. Build core backend services in. Backend/platform services that sit in the.

We are looking for a Senior Backend Developer to join a growing product-focused engineering team. Strong commercial experience as a backend developer using Python ideally within a start‑up or scale‑up environment. Experience designing scalable and maintainable backend architectures.

Join BLP Digital — The #1 Solution for ERP Automation.BLP Digital is redefining ERP automation with agentic AI.Spun out of ETH Zurich and HSG, we build AI agents that automate finance, procurement, logistics, sales, and more for some of the world's largest enterprises.We solve real enterprise prob

Senior Backend Developer – United Kingdom. As a senior developer, you will contribute to the architecture, optimization, and security of critical backend infrastructure while collaborating with product, engineering, and design teams in an Agile environment. The role focuses on building and maintai

Specialist II – Backend Development. Design, develop, and maintain backend applications using. Java backend/application engineering.

Transport for London is seeking Senior Developers to enhance its Contactless platform.

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.

This organisation is seeking a Senior Software Developer with strong technical skills, a passion for improving outcomes and user experience, and the ability to contribute innovative ideas within a multi-disciplinary team. Collaborate within multi-disciplinary/DevOps teams (product owners, UX designe

We’re looking for an experienced Magento backend developer to help lead the delivery of high-quality e-commerce solutions and mentor a growing team. Your deep expertise in Magento, PHP, and backend technologies will ensure the solutions we build are robust, scalable, and aligned with client goals.

Brown & Brown UK is looking for a skilled Backend Developer to work on their custom online platform.

Are you a Senior Backend Developer who wants to own features end-to-end and build products used at scale?. This is a hands‑on engineering role where you’ll combine strong backend development with architecture input, best practice, and real ownership. Design, build and ship high-quality backend f

A leading technology consulting firm in Greater London is seeking a Dot Net Backend Developer to build secure, scalable backend services and cloud-native applications.

This includes: Building endpoints that call LLM APIs (OpenAI, Anthropic) and handle streaming responses Integrating with vector databases for RAG architecture (Pinecone, Weaviate, or similar) Managing context preparation and prompt engineering via backend logic You don't need to be an AI expert, but

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

IBM is seeking a Backend Java Developer in the Greater London area to design and deliver high-quality applications using Java/JEE and modern web technologies. You will develop secure, reliable backend solutions, collaborate with technical teams, and contribute to DevOps practices.

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 access meaningful career opportunities.We're passionate about making education accessible,

We are seeking a Backend Java Developer to design and deliver high‑quality applications using Java/JEE and modern web technologies. Build backend components and services using Java‑based frameworks and languages. Collaborate with analysts, testers, architects, and fellow developers to deliver qu

You will contribute to building a developer ecosystem, focusing on scalable backend services and resilient systems, while collaborating closely with cross-functional teams. A financial technology company based in Greater London is seeking a Senior Backend Engineer to join their App Store & Ecosystem

Trayport is actively looking for a Software Developer to join our team for the design and development of our flagship data analytics platform where you will contribute to system architecture, aid colleagues to help coordinate our projects and review code too.

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. Delivering high-performance, secure, and maintainable backend services through technical innovation,