Senior Python & Java Engineer - Backend

Principle HR; Greater London; On-site; GBP 70,000 - 78,000; Full time

Job summary

A leading financial services consultancy is seeking a Senior Java / Python Engineer to design and implement cloud-native, AI-driven platforms. You will work on backend systems to deliver impactful solutions in a regulated financial environment, utilizing modern AI methodologies. The ideal candidate has strong expertise in Java and/or Python, hands-on AWS experience, and familiarity with distributed architectures. This is a 12-month contract role based in Central London, offering a salary of up to £78,000.

Qualifications

• Strong commercial experience with Java and/or Python.
• Hands-on experience delivering systems on AWS.
• Solid understanding of cloud-native and distributed architectures.
• Exposure to AI/ML platforms, ideally LLM-based solutions.

Responsibilities

• Designing and building backend services using Java and/or Python.
• Delivering cloud-native applications in AWS environments.
• Working with AI/ML solutions, including LLM inference and RAG-based semantic search.
• Owning the full SDLC: system design, development, testing, deployment, and operational stability.

Skills

Java

Python

AWS

AI/ML solutions

distributed architectures

Job description

Build cloud-native, AI-driven platforms within a tier-one financial services environment.

We're working with a global financial institution on a large-scale engineering programme and are looking for a Senior Java / Python Engineer to deliver high-impact backend systems on AWS, with exposure to modern AI and LLM-based solutions.

What's in it for you

• Annual Salary up to £70,000 - £78,000 per annum (DOE)
• 12-month contract - Inside IR35 - PAYE
• 5 days on-site, Central London
• Enterprise-scale systems and long-term programme work

What you'll be doing

• Designing and building backend services using Java and/or Python
• Delivering cloud-native applications in AWS environments
• Working with AI/ML solutions, including LLM inference and RAG-based semantic search
• Owning the full SDLC: system design, development, testing, deployment, and operational stability

What we're looking for

• Strong commercial experience with Java and/or Python
• Hands-on experience delivering systems on AWS
• Solid understanding of cloud-native and distributed architecturesExposure to AI/ML platforms, ideally LLM-based solutions (e.g. RAG, OpenAI, Claude)
• Experience working in regulated or enterprise environments

Interested?

Apply now for immediate consideration. For a confidential discussion, feel free to get in touch.