Harnham
Backend Engineer
Backend Engineer at Harnham, based in London, paying £80,000 per annum. This is a permanent role.
- Pay
- £80,000 per annum
- Hours and contract
- Permanent · On site
- Location
- London
- Closing date
- Sector
- IT & Software
About 41% above the going rate for it & software
Reference https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-backend-enginee
About the role
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BACKEND ENGINEER
UP TO £80,000
LONDON
This is an exciting opportunity to join an early-stage technology business where AI sits at the heart of product development and innovation. You’ll play a key role in shaping a product from the ground up, working across the full technology stack and helping to deliver AI-powered capabilities that solve complex real-world problems.
THE COMPANY
Our client is a technology-driven organisation focused on developing software solutions that help businesses manage complex workflows, data, and decision-making processes. They operate in a collaborative, fast-paced environment where engineering, product, and business teams work closely together to deliver high-impact solutions. They offer the opportunity to work on technically challenging projects while contributing to the evolution of a rapidly growing product.
THE ROLE
Responsibilities include but are not limited to:
- Build, scale, and maintain backend services, including APIs, workflow engines, data services, and system integrations.
- Develop and support integrations between Java/Spring platform components and Python-based AI services.
- Design secure, reliable, and high-performance systems.
- Collaborate with cross-functional engineering teams to deliver robust backend solutions for demanding production environments.
- Implement and enhance API architectures, observability frameworks, automated testing, and security best practices.
- Contribute to cloud infrastructure, CI/CD pipelines, and operational excellence across AWS-based environments.
YOUR SKILLS AND EXPERIENCE:
- Strong commercial experience building backend applications.
- Strong Python experience is essential, with FastAPI as highly desirable
- Strong SQL and PostgreSQL expertise.
- Hands-on AWS experience, including cloud-native services, CI/CD pipelines, and Linux-based environments.
- Strong knowledge of API design, testing strategies, monitoring, observability, and application security.
- Regular use of AI-assisted development tools such as Cursor, Claude Code, or similar productivity tools.
- Experience with Java/Spring, event-driven architectures, workflow engines and LLM integrations is highly desirable.
SALARY AND BENEFITS
- Up to £80,000 base salary
- Contributory pension scheme
- Bonus
HOW TO APPLY
Please register your interest to Mia Randhawa by sending your CV through the ‘Apply’ link
To Apply for this Job Click Here
Reference: https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-backend-enginee · Posted 4 days ago · Closes 29 Nov 2026 · Listed via Harnham
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