Senior Software Engineer

Keyloop
UK
14 days ago
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Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience level
Expert
Experience required
5 years minimum
Compensation
ÂŁ62,815.0
Working hours
Regular working hours

Tech stack

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
+10 more
ReactJS Large Language Models Multi-Agent Systems Prompt Engineering Backend Event Driven Architecture Front End Software Development Virtual Agents Api Design NestJS

Job 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

Requirements

  • 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.

Apply for this position

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Apply on www.adzuna.co.uk
Prepare application

Good distractions

Talks and stories from around this role — technically off-topic, practically not.

2:04 min

Comparing flexible tools against opinionated NestJS frameworks

Matteo Collina Matteo Collina ¡ JS Congress

1:52 min

Structuring and scaling the backend engineering team

Stefan Lingler Stefan Lingler +1 ¡ Coffee With Developers

45 sec

Working securely with Node.js path application programming interfaces

Sonya Moisset ¡ World Congress 2023

1:44 min

Balancing artisanal coding skills with automated agent oversight

Jyoti Bansal Jyoti Bansal +1 ¡ World Congress 2026 Europe

2:51 min

Full stack architecture for server-sent events using Next.js

Ahmed Megahd Ahmed Megahd ¡ World Congress 2025

3:25 min

Constructing scalable AI solutions using LangChain and LangGraph

Juliån Duque Juliån Duque ¡ World Congress 2025

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