Senior/Lead Software Developer

We are at a pivotal stage in our journey. Unify (our software development arm of Fidelity Fulfilment) is scaling rapidly as we take our proprietary warehouse management technology into the market. Our SaaS product is currently in its early go-to-market phase, and we are now building the internal capability required for full commercialisation.

As part of this next chapter, we are expanding our software engineering team and looking for a Senior Software Developer who is eager to play a key role in shaping the technical direction of our platform while mentoring others and contributing to best practice across the function.

If you are excited by the idea of joining a scaling business, working on high-impact technology, and progressing towards a future Lead Developer role, this is an exceptional opportunity.

The Role

As a Senior Software Developer, you will:

• Design, develop, and maintain efficient, scalable, and secure applications using our core technology stack (PHP, Laravel, ).
• Contribute to architectural decision-making and help shape the long-term technical roadmap.
• Provide day-to-day mentoring and support to mid-level and junior engineers, including code reviews and technical guidance.
• Act as a technical interface across our organisation, working closely with Operations, Customer Services, Systems, and Commercial teams.
• Support deployments, release processes, troubleshooting and debugging across our environments.
• Champion best practice across version control, documentation, testing, and deployment.

• Drive continuous improvement and the adoption of modern development tools and methodologies.

• This post is ideal for someone ready to take on greater leadership responsibility and grow into a Lead Developer role, acting as deputy to the Principal Engineer when required.

What We\’re Looking For

• Significant hands-on software development experience.
• Strong proficiency in PHP, Laravel and , with experience building enterprise-grade applications.
• Experience working in a SaaS scale-up or similarly fast-paced environment.
• Confidence contributing to architectural decisions and guiding others technically.
• Strong understanding of RESTful API design, database management, Git, and cloud-based solutions.
• Excellent communication skills, with the ability to translate technical concepts for non-technical audiences.
• Someone proactive, adaptable, and committed to continuous learning and improvement.
• Experience in e-commerce, warehousing, or logistics technology is beneficial but not essential.
• Ability to be on-site in Daventry, UK no less than once a month to be part of our collaborative team events.

What We Offer

• £60,000–£90,000 salary, depending on experience.
• 37.5-hour working week with flexible remote working.
• 31 days leave (inc public holidays) rising to 33 days (inc public holidays) after 3 years service
• Salary Sacrifice workplace pension
• 3X Life Insurance
• Enhanced family leave and pay
• Free confidential employee assistance support giving you advice and guidance for life
• The chance to join a business at a transformative moment and directly influence how our platform scales and evolves.
• Real progression opportunities as we build out the technology function, including a clear path towards a future Lead Developer role.
• A supportive, collaborative engineering culture built on trust, autonomy, and continuous improvement.

How to Apply

If you\’re ready to take the next step in your development career and want to join a business where you can make a meaningful impact, we\’d love to hear from you.