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Backend Engineer
Calyptus
- London, England, United Kingdom
- London, England, United Kingdom
About
Location:
London, England, United Kingdom Employment type:
Full-time Seniority level:
Mid-Senior level Job function:
Information Technology and Engineering Industry:
Information Services What you’ll do: Partner with the Machine Learning team to design and implement scalable solutions that meet customer‑specific requirements Work directly with clients to gather requirements, provide technical guidance, and serve as the
post‑go‑live ML point of contact Develop custom APIs and backend services to enable seamless integration with customer environments Troubleshoot and resolve complex technical issues, acting as the technical liaison between customers and the engineering team Deliver small, targeted features to unblock high‑priority edge cases and resolve customer tickets Partner closely with the ML team on inference/data pipeline issues, adding validation and guardrails where needed Collaborate with Product, Engineering, Customer Success, and Sales to refine features, improve customer experience, and produce clean documentation for smooth handover Contribute to continuous improvement of backend architecture and services, incorporating customer feedback and industry trends Build and maintain self‑service tooling to enable non‑engineers to diagnose and resolve common issues Requirements: Proven experience in
Python‑based backend development ; exposure to frontend technologies (particularly React) is desirable Skilled in troubleshooting
complex production issues , ensuring rapid resolution and system reliability Track record of delivering technical solutions and providing expert guidance to clients in
professional services or consulting settings Ability to design and build scalable,
cloud‑based systems and APIs
that integrate with client systems Experience with database technologies (preferably PostgreSQL) and backend frameworks such as
FastAPI Knowledge of modern AI tools such as
Cursor Hands‑on experience working with
LLMs and prompt engineering Strong communication skills, able to convey complex technical concepts to both technical and non‑technical stakeholders Problem‑solving mindset with a passion for
customer satisfaction and delivering quality solutions Experience with containerization and deployment practices (Docker, Kubernetes, AWS/Azure/GCP) is a plus Demonstrated ability to balance
technical excellence
with
business requirements and time constraints
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Languages
- English
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