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Senior Python Developer

Technology
Haystack
London, United Kingdom4 weeks agoUntil 05/06/2026
Hybrid

Job description

We're working with a powerhouse global consumer brand on this exciting opportunity to lead a high-impact technical transformation.

As a Lead Python Engineer, you will spearhead the architecture and delivery of critical system synchronisations and scalable backend services. This is a high-visibility contract where you will leverage AWS serverless technologies and Infrastructure as Code to build robust, data-consistent solutions for millions of users.

  • *The Role
  • Lead the technical architecture and end-to-end delivery of complex backend solutions and high-performance APIs.
  • Design and implement reliable system integrations and data synchronisation patterns across a distributed landscape.
  • Champion engineering excellence by working within established architecture patterns and rigorous engineering standards.
  • Collaborate directly with Product Managers and stakeholders to translate business requirements into scalable AWS-hosted services.
  • Drive the evolution of the technical roadmap, occasionally contributing to frontend React / Next.js elements when required.
  • *What You'll Need
  • Expert-level proficiency in Python and TypeScript for building complex, scalable backend services.
  • Deep hands-on experience with the AWS ecosystem, specifically ECS, Lambda, Step Functions, and API Gateway.
  • Proven track record of managing production-grade infrastructure using Terraform (IaC).
  • Extensive experience architecting third-party API integrations and managing complex data synchronisation workflows.
  • Strong communication skills with the ability to lead technical decisions and mentor multidisciplinary engineering teams.
  • *What's On Offer
  • Lucrative day rate of £600 - £700 (Inside IR35).
  • Initial 6-month contract with a high likelihood of extension given the project scale.
  • Opportunity to work for a globally recognised brand on mission-critical architecture.
  • *Apply via Haystack today!
Keywords
pythonamazon-web-servicesserverlessinfrastructure-as-code-iacvisual-art-designplanning-and-designproduct-development-and-designreact-jsreactnext-jstypescriptmicrosoft-typescriptamazon-ecsaws-lambdaaws-step-functionsapplication-programming-interface-apiamazon-api-gatewayterraformmentoringmission-criticalhaystack

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