Senior AI (LLM) Engineer
Primary stack
Nice to have's
Job description
About the Position
Impressit is looking for a Senior AI (LLM) Engineer to join a UK-based product team building an AI-powered SaaS platform for property and facilities management. The product uses conversational AI and automation to streamline customer communication and operational workflows. This is a great opportunity to work on production AI/LLM and agentic functionality as an embedded member of an established engineering team. You will continue and evolve an existing AI stack, working with production code and integrations rather than building a solution from scratch.
Responsibilities
- Continue the existing AI/LLM and agentic development work previously owned by the current engineer
- Develop, maintain, and improve AI functionality using Python
- Work with LangChain / LangSmith for AI workflows, tracing, observability, and analysis
- Integrate AI services with the AskPorter platform, database, and other services
- Work alongside TypeScript microservices, primarily reading and understanding existing code, APIs, and integrations
- Work with internal APIs and service-to-service integrations
- Support integrations with communication channels such as Microsoft Bot Framework and WhatsApp, with potential voice integrations
- Take ownership of an existing production codebase and continue development without unnecessary rewrites
- Investigate issues, debug existing AI functionality, and improve system reliability
- Identify and implement practical improvements to AI implementation, observability, and engineering practices
- Collaborate closely with the client’s engineering leadership and other engineers
- Participate fully as a member of the client team, including standups, engineering meetings, retrospectives, and day-to-day technical collaboration
- Ramp up on the existing AI architecture, internal APIs, and development practices
- Contribute to the ongoing evolution of the platform’s AI and agentic capabilities
Requirements
- 4+ years of commercial software development experience
- Strong commercial experience with Python
- Hands-on experience building LLM-powered applications and AI agents
- Proven experience integrating AI functionality into production systems
- Experience with LangChain / LangSmith
- Good understanding of microservice architectures and API-based integrations
- Experience working with internal APIs and service-to-service integrations
- Ability to read and understand TypeScript services and existing integrations
- Experience working with existing production codebases and continuing another engineer’s work
- Strong problem-solving, debugging, and analytical skills
- Ability to identify and implement practical improvements in AI implementation, reliability, observability, and engineering practices
- Strong communication skills and ability to work effectively within a client-side engineering team
- Advanced level of English
Nice to Have
- Experience with Microsoft Bot Framework
- Experience with WhatsApp, messaging, or voice integrations
- Experience with distributed TypeScript microservice ecosystems
- Experience with LLM observability, evaluation, and tracing
- Familiarity with Claude Code or similar AI coding assistants
- Previous experience in PropTech, property/facilities management, SaaS, or conversational AI
- Experience working with an existing AI product where reliability, maintainability, and production readiness are key priorities
We Offer
- Professional education & training budget
- 24 working days of paid vacation
- WOW team-building events
- Paid sick leave
About the Company
We are passionate about everything we do - and we back the people who do it.
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Impressit is a leading software innovation company specializing in developing AI solutions. We unite tech experts with extensive experience in building SaaS products, mobile apps, and web applications to create innovative digital products for our clients.Our mission statement — Encourage our colleagues, our customers, and our partners to fulfill their dreams. Thus at Impressit, you can expect full support with your initiatives, your project ideas, and all possible professional and personal affairs. In return, we’ll challenge you with complex tasks, set high goals and in every possible way motivate you to become a better version of yourself with every day in Impressit team.