Next.js App Router applications
Server Components, Server Actions, RSC streaming, ISR, edge middleware. Type-safe from Drizzle schema to the rendered HTML.
Loading…
Senior engineering · TypeScript
Senior TypeScript engineering for production systems.
TypeScript across the stack — Next.js apps, Node.js services, Hono / Bun / Deno edges, and the type discipline that makes refactors safe at scale.
- In production
- 2019+
- Senior bench
- 60+ G6/G9 engineers
- Floor
- G6+ on client work
- Engagement
- Outcome-led, not hourly
Why senior, not contractor
TypeScript in production is a different problem than TypeScript on a laptop.
TypeScript is the default language for serious web engineering, but most teams use it as JavaScript-with-hints — `any` everywhere, runtime validation missing at the boundaries, and a `strict: false` tsconfig nobody dares flip. Prosigns ships TypeScript as a contract layer: strict-mode in CI, Zod / Valibot at every external boundary, end-to-end type-safety from DB schema through the API to the UI, and refactors that survive the next major framework upgrade.
Senior floor
G6+ minimum
Bench depth
60+ G6/G9 engineers
In production
2019+
Engagement
Outcome-led SOW
Where TypeScript ships
6 sub-areas, grounded in shipped engagements.
Specific applications of TypeScript we’ve built and operate. Every example below maps to a real engagement, not a bullet on a stack-card.
01 02 Node.js + Bun services
Hono, Fastify, NestJS, tRPC. Idempotent APIs, OpenAPI contracts, distributed tracing, structured logging by default.
03 End-to-end type safety
Drizzle / Prisma → tRPC / Hono → React Server Components — one source of truth from DB schema to UI props, no boundary coercion.
04 Edge + serverless
Cloudflare Workers, Vercel Edge, Deno Deploy. Sub-50ms cold-start workloads with KV / D1 / Durable Objects where they fit.
05 Library + SDK engineering
Public TypeScript libraries with proper subpath exports, ESM + CJS dual builds, declaration-emit hygiene, and changeset-managed releases.
06 JavaScript → TypeScript migrations
Phased migrations from legacy JS / CoffeeScript / Flow with a strict-mode adoption ramp and `--noUncheckedIndexedAccess` discipline.
Stack depth
The TypeScript ecosystem, owned.
Frameworks, libraries, and runtime tools the bench has shipped in production. Not a CV-skim — a working depth.
Frameworks
- Next.js
- Remix
- Hono
- NestJS
- Astro
- Tanstack Start
Runtimes
- Node.js
- Bun
- Deno
- Cloudflare Workers
- Vercel Edge
Type tooling
- TypeScript strict
- Zod
- Valibot
- tRPC
- ts-rest
Data layer
- Drizzle ORM
- Prisma
- Kysely
- Postgres.js
- Edge SQL
Quality + ops
- Vitest
- Playwright
- Biome
- ESLint
- OpenTelemetry
Engagement models
Three ways to engage TypeScript engineers.
We don’t bill hourly contractors. Engagements run against outcomes — choose the shape that matches the work.
See engagement models- 01
Fixed-scope
Defined deliverable, fixed price
When the deliverable is clear and the scope is bounded — an MVP, a migration, a discrete platform build. Senior engineering against a written outcome, not against a body count.
- 02
Embedded squad
Senior product team, ongoing
When the work is product-shaped and the cadence is continuous. A senior pod (engineering + design + PM as needed) embedded into your team, with the practice lead co-piloting from HELM.
- 03
Managed services
Steady-state operations
When the system is running and needs ongoing engineering ownership — operations, SLO defense, release management, security and compliance evidence. Monthly retainer against a published SLA.
Selected work
TypeScript engineering that shipped.
Retail
Headless storefront on Next.js + Drizzle for an 9-region D2C brand.
+34%conversion at peakNext.js App Router with Server Components + ISR for catalog freshness. Drizzle schema drove tRPC API and React props end-to-end. Survived Black Friday with zero P1 incidents.
Duration · 5 months
Brief us
Reply < 4 business hoursHave a TypeScript workload? Send a brief.
Five fields. Goes straight to the practice lead — not an SDR. We’ll reply with a senior engineer’s read on fit, scope, and the engagement model that suits the work.
FAQ
Questions buyers ask.
Everything below also appears in the proposal and the SOW — no surprises after signing.
Next.js, Remix, or Astro?
Next.js for most enterprise web apps where the App Router + Server Components story fits. Remix for content-heavy apps with traditional MPA semantics. Astro for content-led marketing surfaces with islands of interactivity. The pick is workload-led; we'll tell you which fits.
Do you do tRPC or REST + OpenAPI?
tRPC when the consumer is a tightly-coupled internal frontend and end-to-end inference is the primary value. REST + OpenAPI when there are external consumers, multiple frontends, or a contract-first integration surface. Both patterns are in our portfolio.
Is this staff-aug, or is it engineering-led delivery?
Engineering-led delivery. We don't bill hourly contractors against your JIRA board. Every engagement runs against a defined outcome with a senior engineer accountable from kickoff to operating cutover. If you genuinely need staff-aug — discrete bodies, your management, hourly rates — we'll be honest and route you to a partner that fits.
What seniority floor are we talking about?
G6 minimum (six-plus years in their craft) on every billable hour. Department leads are G9 or G10. We don't flex juniors onto the bench mid-sprint, we don't subcontract to delivery centers, and we don't dilute senior rates with mixed staffing. The bench in the proposal is the bench in production.
How does pricing work?
Three engagement models published at /engagement-models/. Fixed-scope for defined deliverables, embedded squads for ongoing product work, managed services for steady-state operations. Rates depend on seniority, engagement length, and region. Discovery + scoping conversation is free; SOWs are written against deliverables, not bodies.
Where are your engineers based?
Senior-only across Dallas, Doha, Lahore, and Islamabad. We staff against the engagement's needs (timezone, language, regulatory frame), not against arbitrary regional preferences. Most engagements run with a US/EU-aligned core and a follow-the-sun extended bench when the workload warrants it.
Will the engineers I see in the proposal be the engineers shipping the work?
Yes. We name the engineers in the SOW, attach their profiles, and they're on the kickoff. We don't bait-and-switch with senior reviewers and junior execution. If a named engineer needs to roll off the engagement (rare), we surface a replacement from the same seniority tier with explicit handoff.
Talk to a TypeScript lead
Senior TypeScript engineering, accountable from kickoff.
Bring the workload — we’ll bring a senior engineer plus the practice lead most relevant to the work. 30 minutes, no obligation, no junior reps.