Senior Backend Engineer

Lumora Solutions; United Kingdom; On-site; GBP 90,000 - 120,000; Full time

Job summary

Lumora Solutions is seeking a Senior Backend Engineer to join its AI Platform Engineering Team in the United Kingdom. You will help shape the platform from the ground up, building core services, APIs, and data integrations while establishing testing frameworks and guardrails for enterprise AI solutions.

You will own services end-to-end, collaborating with product teams and customers to validate solutions, measure impact and deliver value through iterative development.

Qualifications

• Experience building production backend or distributed systems.
• Ownership across design, testing, deployment and operational reliability.
• Ability to explain architectural decisions and trade-offs.
• Strong communication with engineers, product teams and customers.
• Pragmatic, value-driven mindset focused on outcomes.
• Proficiency in C#/.NET or Python; Go is a bonus.
• Nice to have: multi-tenant SaaS, production LLM-powered services, AI coding assistants.

Responsibilities

• Design, build and maintain core backend services, including APIs, orchestration and access controls.
• Develop secure, scalable multi-tenant SaaS services and reliable data integrations.
• Take end-to-end ownership from architecture to deployment and production support.
• Collaborate with product teams and customers to validate solutions and measure impact.
• Help shape engineering standards, mentor peers and contribute to a high-performing AI platform team.

Skills

Backend development

Distributed systems

C#/.NET

Python

Go

Multi-tenant SaaS

LLM-powered services

AI platform

Job description

Our client is a fast-growing software technology firm in the transportation sector, looking for a Senior Backend Engineer to join its AI Platform Engineering Team.

As a founding team member, you'll help shape the platform from the ground up, building core services, APIs, orchestration and data integrations, while establishing the standards, testing frameworks and guardrails that underpin the next generation of enterprise AI solutions.

What you will be doing:

• Design, build and maintain core backend services, including APIs, orchestration and access controls, that underpin a new enterprise AI platform.
• Develop secure, scalable multi-tenant SaaS services and reliable data integrations, ensuring performance, resilience and quality at scale.
• Take ownership of services end to end, from architecture and implementation through to testing, deployment and production support.
• Work closely with product teams and customers to validate solutions, measure impact and deliver value through an iterative, evidence-led approach.
• Help shape engineering standards, establish best practices, mentor colleagues and contribute to building a high-performing AI platform engineering team.

What you will bring:

• Experience building and operating production backend or distributed systems that other teams rely on.
• A strong sense of ownership across design, code quality, testing, deployment and operational reliability.
• The ability to explain technical decisions, architectural trade-offs and the reasoning behind your approach.
• Strong communication skills, with the ability to collaborate effectively with engineers, product teams and customers.
• A pragmatic, value-driven mindset, focused on solving problems, delivering outcomes and continuously improving.
• Strong proficiency in C#/.NET or Python, with Go experience considered a bonus.
• Nice to have: Experience with multi-tenant SaaS, production LLM-powered services, and AI coding assistants.
• Join a fast-growing Software Technology Company.
• Clear opportunities to grow, take ownership, and progress within the company.