Staff Software Engineer

JR United Kingdom; Fleet; Hybrid; GBP 105,000; Full time

Job summary

A leading technology company in Fleet is seeking a Staff Software Engineer to lead modernization initiatives and transform legacy systems into a cloud-native architecture. The role involves hands-on engineering, mentoring, and collaboration across teams. The ideal candidate will have deep experience in migration projects and a strong background in modern programming languages.

Benefits

27 days holiday rising to 32 with service

Free Gym

Enhanced Maternity and Paternity benefits

Private medical insurance

Learning & Development Hybrid model

30 days work-from-anywhere policy

Work from home budget

Qualifications

• Deep experience leading migration or modernisation projects.
• Strong hands-on engineering background with C#/.NET, Golang, Python, or NodeJS.

Responsibilities

• Lead migration of legacy .NET systems to modern stack.
• Champion DevOps best practices: CI/CD, automation, IaC.

Skills

Leadership

Collaboration

DevOps

Cloud Experience

Proactive Mindset

Tools

Docker

Kubernetes

Terraform

React

TypeScript

Job description

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Staff Software Engineer (.NET, Golang, Python, NodeJS) – Greenfield Tech refresh project

Location: Fleet (Hybrid: 2 days per week onsite)

Salary & Benefits: Up to £105,000 + 10% Bonus + Excellent Benefits

About the Role

Are you a passionate Staff or Principal Engineer looking to lead modernisation initiatives and shape the next generation of systems for a scaling tech-led business?

We’re working with a cutting-edge technology company that is overhauling its legacy .NET systems and moving toward a modern, cloud-native, event-driven architecture with Go and other modern software development languages. They're seeking an experienced Staff Engineer, who has worked on similar modernisation and migration projects, to play a pivotal role in this transformation journey.

What You’ll Be Doing:

• Lead the migration of large-scale, legacy .NET systems to a modern stack (Golang, Python, NodeJS).
• Own key architecture and platform decisions to improve system performance, reliability, and scalability.
• Champion DevOps best practices: CI/CD, automation, IaC (Terraform), observability, and security.
• Collaborate across teams, build strong engineering practices, and foster a culture of continuous improvement.
• Mentor and guide engineers, shaping both tech strategy and team capability (70% hands-on, 30% leadership).

What They’re Looking For:

• Deep experience leading major migration or modernisation projects.
• Strong hands-on engineering background with languages like C#/.NET, Golang, Python, or NodeJS.
• Cloud experience (AWS preferred; Azure also welcome), including serverless tech like Lambdas.
• Solid understanding of containerisation (Docker, Kubernetes), infrastructure as code (Terraform), and modern software design patterns.
• Exposure to front-end technologies like React, TypeScript, or Astro is a bonus.
• Proactive, collaborative mindset with the ability to influence and lead through change.

What’s on Offer?

• Up to £105,000 salary + 10% discretionary bonus
• 27 days holiday rising to 32 with service + bank holidays
• Free Gym
• Enhanced Maternity and Paternity benefits
• Long service awards
• Private medical insurance
• Learning & Development Hybrid model
• Working model: 2 days per week onsite in Fleet, with potential for flexibility
• 30 days work-from-anywhere policy, annual pay reviews
• Work from home budget

If this sounds like you, then please click apply now!