Principal Software Engineer - Java

CompanyHarvey Nash

LocationLondon Area, United Kingdom

Posted At1/23/2026

UK Visa Sponsorship Analytics

Occupation Type

Programmers and software development professionals

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,700 (£28.05 per hour)

Occupation rate applies

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Description

Principal Software Engineer – (Hybrid, London)

£90,000–£100,000 + 10% Bonus + 10% Share Options + More

Able to get into London when required (Circa. 2/3x a month)

A specialist cloud and platform engineering consultancy is hiring a Principal Software Engineer to lead the design and delivery of modern, scalable software systems for public and private sector clients.

This is a senior, hands-on role for an experienced engineer who enjoys working across architecture, delivery and technical leadership, helping teams build high-quality systems while improving engineering practices and developer productivity.

The Role

You’ll act as a technical lead across multiple delivery engagements, shaping architecture, mentoring engineers and working closely with customers to translate business problems into robust technical solutions.

You’ll remain hands-on, particularly across Java/Spring and React, while influencing standards, patterns and best practices across the wider engineering organisation.

Key Responsibilities

Lead design and delivery of modern, scalable software systems

Shape architecture, service boundaries and system decomposition (DDD, microservices)

Drive improvements in testing, automation and delivery processes

Work hands-on across the stack, particularly with React and Java/Spring

Reduce technical debt and improve long-term maintainability

Collaborate with cloud and platform teams on end-to-end solutions

Act as a senior technical advisor to customers

Mentor engineers and contribute to shared engineering standards

What We’re Looking For

Strong experience with Domain Driven Design and microservices
Deep hands-on background in Java/Spring and React
Experience improving engineering effectiveness and developer tooling
Confidence leading technical discussions and mentoring teams
Consulting mindset with strong stakeholder communication

Tech Stack

Core: Java, Spring, React, SQL/NoSQL, Docker, Kubernetes, AWS, GitLab, Playwright

Nice to have: GovUK Design System, Azure/GCP, .NET

Why Apply

High-impact work with major public and private sector clients

Influence architecture and engineering practices at scale

Strong focus on modern engineering, cloud and developer experience

Hybrid working with excellent work-life balance

Clear progression at Principal and beyond

Location: London (Hybrid, ~1 day per week onsite)

Package: £80k–£100k + 10% bonus + share options + full benefits

Contract: Permanent, Full-time