Senior Java / Python Engineer

Deloitte - Recruitment; Greater London; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading consultancy firm based in London is looking for a Senior Java/Python Engineer. The role requires extensive experience in Java and Python, with a strong background in system design and cloud-based applications. Key responsibilities include delivering full system solutions and ensuring operational stability in cloud environments. This position is on-site for 5 days per week and is offered as a 12-month contract. Competitive day rates are available.

Qualifications

• Minimum of 5 years of experience in Java and Python.
• Experience in delivering application development and operational stability in cloud environments.
• Familiarity with artificial intelligence and machine learning implementations.

Responsibilities

• Deliver end-to-end system design and application development.
• Ensure operational stability in cloud environments.
• Implement solutions using cloud technologies.

Skills

Proficient in Java / Python concepts

Hands-on practical experience in system design

Advanced knowledge of cloud-based systems

Experience with RAG-based semantic search

Tools

AWS

Job description

London, United Kingdom | Posted on 03/02/2026

• Work Experience Senior Java/ Python Engineer
• City London
• Province City of London
• Country United Kingdom
• Postal Code E14

Job Description

SeniorJava/ Python Engineer

Location: London (5 days in office)

Duration: 12 months

Competitive Day Rate (Inside IR35)

Key Skills

• Proficient in Java / Python concepts and proficient advanced experience.
• Hands-on practical experience delivering system design, application development, testing, and operational stability, particularly in cloud environments.
• Advanced knowledge of cloud-based systems, artificial intelligence, and machine learning, with considerable in-depth knowledge in implementing solutions using AWS.
• Practical cloud-native experience, specifically with AWS.
• Experience with RAG-based semantic search and LLM inference workflows using OpenAI and Claude models.