James Calmus — Part-Time Frontend Engineering Partner

Hi, I'm James.

I help growing teams stabilise and scale their frontend, part-time.

Head of Frontend Engineering level support for teams feeling frontend pain.

I'm currently Head of Frontend at Policy Expert. I work with a small number of teams, usually 5-10 hours a week per client.

Email me

Ways to work together

Frontend audit (one-off)

A practical review of your frontend architecture, performance, and team workflow. You get a clear set of priorities, not a huge document.

Part-time support (retainer)

I embed with your team for 5-10 hours a week to unblock engineers, steady delivery, and help you make better frontend decisions.

Short-term project work

Focused help to get a specific piece of work over the line, like a design system rollout, performance reset, or frontend architecture cleanup.

Problems I solve

  • Your team is shipping, but every frontend change feels risky and slower than it should.
  • You have good engineers, but no clear frontend direction across apps and shared components.
  • The design system exists, but adoption is patchy and product teams are drifting in different directions.
  • Performance keeps showing up in complaints and backlog tickets, but never gets properly fixed.
  • You're scaling the team and need senior frontend leadership before you can hire it full-time.

Proof and experience

Clean Up Gambling

Built a campaign platform in Next.js with a custom CMS to create a fast, cost-effective content-driven website.

Gamban4Greyhounds

Delivered a dynamic campaign site and write-to-MP flow, combining clear UX with a reliable backend integration.

LabourList

Led WordPress theme engineering work and advised on content migrations, DDOS support and style direction.

Most of my recent work has been at Policy Expert, where I lead frontend engineering across teams. That includes scaling delivery, improving architecture, and building shared systems that teams actually use.

How I work

I work as part of your team, not as a detached advisor. I focus on unblocking engineers, simplifying systems, and helping you make sensible frontend decisions that hold up as you grow.

Get in touch

Happy to take a quick look and share some thoughts.

james@debutsoft.com