Haystack
← Back to Jobs
Full time
Technology
CS

Senior Backend Software Engineer Python

Client ServerBarbican, Central London🇬🇧United KingdomPosted 8 Sept 2026

Why This Role Stands Out

Advance your career building a cutting-edge AI data pipelining platform where you'll own critical components and influence product direction. This hybrid role is perfect for experienced Python backend engineers who thrive on solving complex distributed systems challenges and desire a collaborative environment with significant growth potential. Apply now to join a dynamic team and shape the future of AI technology!

Quick Overview

Salary
£120k/yr
Seniority
Mid Senior
Employment type
Full Time
Work mode
Hybrid
Location
Barbican, Central London, United Kingdom
Posted
Yesterday
DockerDynamoDBFastAPIAWSGitHub ActionsPostgreSQLPythonTerraform

Job Description

Senior Backend Software Engineer / Developer (Python) London / WFH to £120k

Are you a technologist with start-up experience looking for your next opportunity?

You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform.

As a Senior Backend Software, you'll own the orchestration engine that controls scheduling, execution, state, retries, concurrency and cancellation, using Python, FastAPI and AWS in a high velocity production environment. You'll design for unpredictable workloads, solving challenges around capacity, back pressure and isolation, while building the AI native layer that will underpin the next generation of the product.

You'll own your infrastructure end-to-end, writing Terraform, monitoring what you ship and resolving issues in production. Working across the full development lifecycle, you'll take features from idea through to production, collaborate directly with customers to solve complex real-world problems and use your technical insight to influence the product roadmap. As part of a small, ambitious engineering team, you'll also have a genuine opportunity to shape engineering standards, culture and ways of working.

Location / WFH:

You'll join colleagues in the London office (close to Waterloo) with flexibility to work from home twice a week.

About you:

  • You have advanced backend Python coding skills, including FastAPI
  • You have a good understanding of system architecture, design and scalability
  • You have experience of working on distributed systems
  • You're familiar with other technology in the stack including: AWS, IaC using Terraform, Docker, PostgreSQL, DynamoDB, CI/CD, GitHub actions, Blacksmith runners
  • You're collaborative and pragmatic with great communication skills, keen to input into technical discussion and decision making

What's in it for you:

  • Salary to £120k
  • Equity
  • Impactful role with excellent career progression as the company scales
  • Hybrid working
  • Pension

Apply now to find out more about this Senior Backend Software Engineer / Developer (Python FastAPI AWS) opportunity.



Similar jobs