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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Keyloop - **Location:** UK - **Experience:** Expert - **Salary:** £62,815.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Cloud Computing, Code Review, Databases, Cursor (Graphical User Interface Elements), Python (Programming Language), PostgreSQL, Node.Js, Software Architecture, Data Streaming, TypeScript, GitHub Copilot, ReactJS, Large Language Models, Multi-Agent Systems, Prompt Engineering, Backend, Event Driven Architecture, Front End Software Development, Virtual Agents, Api Design, NestJS - **Published:** August 22, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5851145992 ## About the Role * Strong professional experience with TypeScript across the stack. Node.js on the backend, React on the frontend. * Solid understanding of backend architecture: API design, service patterns, and database modelling with PostgreSQL. * Experience building or working closely with LLM-powered or agentic systems using Python. Prompt engineering, tool use, RAG, agent orchestration frameworks, or similar. * Proficiency with AI-assisted development tools (e.g. GitHub Copilot, Cursor, Claude Code). * 5+ years experience delivering software products at scale. * A product-focused mindset, you think about users and outcomes, not just code. * Strong communication skills, you can articulate technical decisions clearly to engineers and non-engineers alike. Nice to have: * Experience with agent frameworks such as LangChain, LangGraph, AgentCore or similar. * Familiarity with streaming, real-time, or event-driven architectures. ## Description As a Senior Software Engineer, you'll be at the heart of product development and delivery. Building customer-facing AI agents that drive our platforms and creating omnichannel communication experiences that puts agentic conversations in the hands of consumers. You'll work across the full stack, from backend services and agent orchestration logic to the interfaces customers experience. You'll play a hands-on role in defining how we architect and scale our platform using cloud technologies and you'll be working close to the cutting edge of agentic AI, designing agents that reason, take action, and handle complex, multi-step interactions. What You'll Be Doing: * Design, build, and iterate on customer-facing AI agents using Python and Node.js, including orchestration, tool use, memory, and conversation logic. * Contribute to backend services using NestJS, and PostgreSQL, and Vector databases with a focus on reliability, maintainability, and scale. * Help develop our omnichannel platform that enables seamless conversations across multiple communication channels (web, messaging, voice, and beyond). * Collaborate closely with product, design, and data teams to shape what agents do and how they work. * Define technical patterns and best practices as we scale our agentic systems globally. * Participate in code reviews and contribute to a culture of thoughtful, high-quality engineering., Why join us? We're on a journey to become market leaders in our space - and with that comes some incredible opportunities. Collaborate and learn from industry experts from all over the globe. Work with game-changing products and services. Get the training and support you need to try new things, adapt to quick changes and explore different paths. Join Keyloop and progress your career, your way. An inclusive environment to thrive We're committed to fostering an inclusive work environment. One that respects all dimensions of diversity. We promote an inclusive culture within our business, and we celebrate different employees and lifestyles - not just on key days, but every day. Be rewarded for your efforts We believe people should be paid based on their performance so our pay and benefits reflect this and are designed to attract the very best talent. We encourage everyone in our organisation to explore opportunities which enable them to grow their career through ## Related Videos - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [Building AI Applications with LangChain and Node.js](https://www.wearedevelopers.com/videos/1512-building-ai-applications-with-langchain-and-node-js) - [Stop using Node.js like in 2020! What changed and what you can do today with Node.js](https://www.wearedevelopers.com/videos/100011-stop-using-node-js-like-in-2020-what-changed-and-what-you-can-do-today-with-node-js) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Next, Nest, Nuxt… Nust?](https://www.wearedevelopers.com/videos/421-next-nest-nuxt-nust) - [Stop Using Node.js Like It’s 2020! - Alfonso Graziano](https://www.wearedevelopers.com/videos/1863-stop-using-node-js-like-it-s-2020-alfonso-graziano) ## Related Articles - [The Prompt Engineer ✍️](https://www.wearedevelopers.com/magazine/216-the-prompt-engineer) - [What Are Large Language Models?](https://www.wearedevelopers.com/magazine/304-what-are-large-language-models) - [What is Agentic Programming and Why Should Developers Care?](https://www.wearedevelopers.com/magazine/625-what-is-agentic-programming-and-why-should-developers-care) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this)