Senior Backend Engineer (Python / AWS Serverless)

Senior Backend Engineer (Python / AWS Serverless)

London, N7 (Hybrid)

£75,000 – £90,000 + Equity

Deep Tech Scale-Up

Sponsorship available – must be UK-based and able to attend site.

Intro

We’re partnered with a well-funded deep tech scale-up with a global footprint, currently scaling their internal platforms and looking for a Senior Backend Engineer to build Python-based systems that support cutting-edge research and engineering.

This is a high-impact opportunity to work in a complex, hybrid environment (cloud and physical systems), where your work directly enables breakthrough technology.

The Role

This is a hands-on backend engineering role focused on building and owning Python-based applications and API-driven systems.

You’ll work across backend development and AWS serverless architecture, with a strong emphasis on writing clean, scalable Python code.

This is not a traditional DevOps or infrastructure role — the focus is on building software systems, not just managing cloud environments.

What You’ll Be Doing

• Building Python-based backend services and APIs
• Designing and developing API-driven applications
• Working with AWS serverless architecture (Lambda, API Gateway, DynamoDB, Cognito)
• Improving and redesigning existing systems and applications
• Collaborating with cross-functional teams including engineering and research
• Supporting a hybrid cloud and on-prem environment
• Taking ownership of systems end-to-end, from design through to deployment and optimisation
• Working with infrastructure as code and CI/CD pipelines where needed

What They’re Looking For

Essential

• Strong commercial experience building backend systems and APIs in Python (core language)
• Hands-on experience with AWS, ideally serverless environments
• Experience designing and building scalable systems
• Proven ability to own and deliver projects end-to-end
• Comfortable working in a fast-paced, scaling environment
• Strong problem-solving skills and ability to work independently

Nice to Have

• Experience with AWS services such as Lambda, API Gateway, DynamoDB, and Cognito
• Experience with infrastructure as code such as Terraform
• Exposure to hybrid environments combining cloud and on-prem systems
• Experience with CI/CD tools such as GitLab
• Background in platform engineering or internal tooling

Tech Stack

• Python
• AWS (Lambda, API Gateway, DynamoDB, Cognito)
• Terraform and Ansible
• GitLab CI/CD
• Bash scripting
• Hybrid infrastructure (AWS + on-prem systems)

Additional Information

• Hybrid working, 3 days per week in London (Islington)
• Flexibility on working patterns
• Opportunity to work closely with hardware and research teams
• Equity package alongside base salary
• Strong benefits including private healthcare and pension
• Opportunity to introduce new technologies into the business

Why Join?

• Work on cutting-edge technology in a deep tech environment
• High ownership and autonomy from day one
• Opportunity to shape systems in a growing company
• Collaborative and mission-driven team