Backend Engineer

Calyptus; Leeds; On-site; GBP 50,000 - 70,000; Full time

Job summary

A technology solutions provider in the UK seeks a Backend Developer to partner with the Machine Learning team. Ideal candidates will have proven experience in Python-based backend development and strong troubleshooting skills. The role requires designing scalable cloud-based systems and delivering solutions for clients. Successful candidates will communicate effectively with technical and non-technical stakeholders while ensuring rapid resolution of complex issues. A passion for customer satisfaction is essential, along with experience in containerization and deployment practices.

Qualifications

• Proven experience in Python‑based backend development.
• Skilled in troubleshooting complex production issues.
• Ability to design and build scalable, cloud‑based systems.

Responsibilities

• Partner with the Machine Learning team to design and implement scalable solutions.
• Work directly with clients to gather requirements and provide guidance.
• Develop custom APIs and backend services for client integration.

Skills

Python‑based backend development

Troubleshooting complex production issues

Technical solutions delivery

Cloud‑based systems design

Database technologies (PostgreSQL)

Modern AI tools

Working with LLMs

Problem-solving

Containerization and deployment practices

Tools

FastAPI

Docker

Kubernetes

AWS

Azure

GCP

Job description

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