Senior Backend Engineer (Python) - 6 month contract

We are excited to be working with a VC-backed AI-first HRTech scale-up looking to hire an exceptional contract Senior Backend Engineer into their UK business, to play a pivotal role in building their next generation benefits platform.

Funded by high-profile backers, they continue to invest heavily in their teams in 2025 following their Series B fundraise in 2023, and see now as the perfect time to add more exceptional talent to their already-world-class engineering team.

This contractor could be based fully-remote anywhere in the UK or hybrid out of their London HQ – the choice is entirely yours.

As Senior Backend Engineer you will:

• Leverage Python and modern technologies to build world-class applications, mentor team members, and collaborate across backend, data, ML, and potentially frontend.
• Shape and implement their next-gen benefits platform by designing ETL pipelines, data models, and analytics infrastructure to drive meaningful business impact.
• Write clean, tested, and well-documented code, contribute to peer reviews, and ensure high-quality deliverables through CI/CD and version control.
• Work closely with product, design, and business teams to define features, improve user experience, and contribute beyond engineering to clinical, sales, and marketing functions.

We want to hear from you if:

• You have 5+ years of experience developing and architecting customer-facing web applications using Python and/or backend languages like Java or Scala, with expertise in data processing, pipelines, and large-scale data flows.
• You have the mindset and approach of a Founding Engineer. You love building impactful products from scratch and have done so for at least one early stage startup.
• You have a history of thriving in the ambiguity and uncertainty of nascent projects, and relish the opportunity to shape the future
• You have strong technical skills in Google Cloud (preferred) or AWS, Kubernetes, Kafka, RESTful APIs (FastAPI), and familiarity with machine learning and AI methods.

Contract details:

• Up to £600/day
• 6 month contract initially
• Outside IR35 contract
• Fully remote or hybrid working model out of their London HQ – the choice is yours