React consultant for CTOs weighing a migration
Written React architecture audit and migration plan. CRA to Vite, Redux to Zustand, React 17 to 19. Optional implementation.
Who this is for
CTO weighing a CRA to Vite migration, a Redux to Zustand rewrite, or a React 17 to 19 jump.
The pain today
- Nobody on the team has shipped a large React migration.
- Leadership wants a plan before committing budget and timeline.
- The bundle is too big and the tooling feels from 2019.
- Half the codebase is class components; the rest is hooks.
The outcome you get
- A written React architecture audit and migration plan.
- Phase-by-phase migration schedule with hours and risks.
- A state-management decision document the team can follow.
- Optional implementation follow-up at the Applications rate.
What the React audit finds
Every React audit finds the same five categories: re-render hotspots (components that re-render on every parent update due to missing memoization or unstable props), bundle bloat (libraries imported whole instead of tree-shaken, duplicate versions of the same package, dev dependencies in prod builds), a11y gaps (semantic HTML missing, focus traps broken, color contrast), state fragmentation (three state libraries in one codebase, local state leaking into global, server state in Redux instead of React Query), and RSC-readiness (for teams considering Next.js App Router, how much of the UI could become a Server Component). Each finding comes with hours to fix.
bolttech plus Instill as the comparative baseline
bolttech ran React plus NestJS at $1B+ unicorn scale across 40+ payment provider integrations and 99.9% uptime. The React codebase had to survive a payment orchestration feature-set without dropping a transaction. Instill runs React 19 plus Next.js 16 at startup scale with 30+ active users and a standalone MCP server. Same engineer, two opposite scale points. The advisory engagement uses that range as reference — what a greenfield React project should look like today, what a 100-engineer codebase must look like, and how you migrate one into the shape of the other.
Sample CRA-to-Vite migration plan
CRA-to-Vite is a three-phase job. Phase 1 (1 to 2 weeks): replace react-scripts with Vite, fix env var prefixes, update path aliases, smoke test. Phase 2 (1 to 3 weeks): migrate test runner (Jest to Vitest where beneficial), fix any Babel-specific transforms, update CI. Phase 3 (1 to 2 weeks): optimize the production build, add code splitting, adopt bundle-size CI. Total: 3 to 7 weeks depending on codebase size and test coverage.
Pricing and what you get
Advisory engagement at $4,500 per month (pro-rated for 1 to 4 week scope). You get a written audit report, a migration plan, a debrief call with leadership, and a 2-week follow-up call. If you want me to execute, the Applications subscription at $3,499 per month covers implementation. Most teams do the audit first, then decide. The audit is useful even if a different engineer implements.
Recent proof
A comparable engagement, delivered and documented.
Unified payment orchestration across Asia and Europe
Delivered the payment orchestration platform at bolttech, a $1B+ unicorn, with 40+ integrations across multiple regions.
Frequently asked questions
The questions prospects ask before they book.
- Can you audit a React Native app too?
- No. React Native is out of my core stack. Web React on Vite, Next.js, Remix, CRA, Gatsby — yes. React Native — refer to a specialist.
- How long does the audit take?
- 1 to 4 weeks depending on codebase size. 50k line React app with tests takes about 2 weeks. Larger monoliths take 4.
- Do you cover micro-frontends?
- Yes. Module federation, single-spa, and the decision of whether micro-frontends are the right answer (usually the answer is no) are inside the audit when relevant.
- What if we are on React 16?
- Common. The audit includes a React 16 to 18 or 19 migration plan with phased upgrades. Takes 2 to 6 weeks to execute depending on codebase size.
- Can you benchmark against our competitor's app?
- Yes. Lighthouse, WebPageTest, and bundle analyzer against two or three competitor apps are included when the audit scope calls for it.
Ready to start?
Tell me what you need in 60 seconds. Tailored proposal in your inbox within 6 hours.