Service · React
React consulting for production teams
Senior React work for teams already shipping. Architecture, performance, testing and hands-on delivery, drawn from years of production code and the patterns in the React book.
Most React codebases reach a point where the team can ship, but the cost of every new feature keeps creeping up. Components grow, state spreads across files, tests turn brittle, and bundle size quietly doubles. That's usually when teams reach out.
The problem is rarely a single decision. It's a stack of small ones that looked fine at the time. Local state where context would help. A custom store where React Query would do the job. A wrapping HOC where a hook would read better. Six months later, those choices compound.
We come in as a senior pair of hands. The first job is reading the code with fresh eyes and reporting back. The second is fixing the parts that hurt the most. The third is leaving the team in a better position than before, with patterns they can apply on their own.
What we do
React engagements, four ways
Pick the shape that matches what you need this quarter.
Architecture review
A full read of the codebase, the data flow and the component patterns, with a written report you can act on. We map where complexity lives, where it shouldn't, and what to refactor first.
- Folder structure, boundaries and module ownership
- State strategy: local, context, Redux, Zustand, Jotai, React Query
- Risk list ranked by impact and effort
Performance optimisation
Real performance work, not a Lighthouse snapshot. We profile renders, trace network waterfalls, audit the bundle and write the fixes. The goal is faster pages your users actually feel.
- Bundle analysis, code splitting and lazy loading
- Render profiling, memoisation, virtualisation
- Core Web Vitals targets your team can hold
Testing and refactoring
A test suite that catches real regressions, not one that fails when CSS changes. We work in Jest, Vitest, React Testing Library and Playwright, and we refactor with the suite as our safety net.
- Testing strategy: unit, integration, e2e split
- Refactoring plans with rollback points
- CI setup so the team trusts the green build
Hands-on senior delivery
When you need a senior pair of hands on the keyboard, not another deck. We ship features alongside your team, review the pull requests and bring the patterns from the React book into your codebase.
- Feature work on React 18+ with TypeScript
- Code review and mentoring for junior developers
- Weekly cadence, async-friendly, EU/UK/US timezones
How an engagement looks
No long sales cycle. Most projects start within a week of the first call.
- 1
Discovery call
A free 30-minute call. You walk us through what you're shipping, the stack and the pain. We ask the awkward questions early so the scope reflects reality.
- 2
Written scope and proposal
Within two business days you get a written scope with deliverables, timeline and a fixed price or weekly rate. No retainer surprises.
- 3
Architecture review or sprint kickoff
For audits, we book one week of deep work and deliver a written report at the end. For delivery work, we slot into your sprint cadence from day one.
- 4
Weekly delivery and code review
A weekly check-in, async pull request reviews and a Slack channel for the day-to-day. You always know what's landing and what's blocked.
FAQ
Common questions
What size React codebases do you work on?
Most engagements sit between 30k and 1M+ lines of TypeScript. The hard problems are usually structural rather than scale-driven, so the size matters less than the state of the team and the deadlines.
Do you write code or only review it?
Both. Roughly two thirds of engagements include hands-on delivery alongside the audit work. If you only need the report, that is on the menu too.
What's the typical stack you support?
React 18+ with TypeScript, Next.js, Remix, Vite, React Native. State with Redux, Zustand, Jotai, Recoil or context. Server state with React Query, SWR or Apollo. Tooling with Jest, Vitest, React Testing Library, Playwright, Tailwind, Storybook.
Can you help with a Next.js migration?
Yes. Pages Router to App Router, Vercel to self-hosted, or a full move from CRA or Vite to Next. See the Next.js consulting page for the detail.
How do engagements work, fixed price or hourly?
Fixed-scope for audits, weekly retainer for delivery. Hourly is reserved for ad-hoc emergencies. Pricing is on the pricing page so you can plan before the first call.
What about React Native?
Covered, and it sits in the same book. Architecture, navigation, native module wrangling and release pipelines for iOS and Android. React: The Road To Enterprise covers the patterns we use.
Last updated: 2026-05-20
Next step
Got a React codebase that needs senior eyes?
Tell us about the stack, the team size and where it hurts. We reply within two business days.