NorthlayerSTHLM

Services / Full-Stack Product Work

Senior hands for your MVP or your next big feature.

API design, frontend, login, tests and deployment, end to end. One senior engineer who can own a feature from the first sketch to production.

TypeScript · React · Angular · .NET · Node.js

FormatPer feature or contract
DemosWeekly
PriceFixed quote or day rate
You keepAll code from commit one

Sound familiar?

Signs you need this

Your MVP needs to be rebuilt properly before you raise or scale

A key feature is stuck because nobody owns it end to end

You need APIs that other teams or partners can build on

Your test coverage is too low to ship with confidence

The change

Before and after

BeforeAfter
A feature stuck with no ownerOne senior engineer owns it end to end
APIs that break other teamsVersioned contracts everyone builds against
Shipping without testsTests run on every change

What you get

Deliverables

API design

REST or GraphQL APIs with clear contracts and versioning.

Frontend

React or Angular interfaces, including complex ones like scheduling grids and real-time updates.

Login and permissions

OAuth, single sign-on and role-based access.

Integrations

Payments, partner APIs and webhooks.

Tests

Unit, API and end-to-end tests in the pipeline.

Deployment

Shipped through your CI/CD, or we set it up.

How it runs

Four steps

  1. ScopeFeature broken into small deliverables with dates.
  2. BuildWeekly demos on a staging link.
  3. ReviewCode review with your team, tests included.
  4. ShipReleased to production and handed over.

What we need from you

  • Access to the repo, tracker and team chat
  • A product owner who can answer questions within a day
  • Your design files, if you have them

Proof

Done before, in production

  • Built features for a consumer app used by more than 60 million customers
  • Designed APIs across three teams that cut integration defects by about 40%
  • Raised test coverage on critical services from about 45% to over 80%

From our lead engineer's roles at larger companies. See Work.

Fit and price

A good fit if

  • TypeScript, React, Angular, .NET or Node.js stacks
  • Web products and APIs

Not a fit if

  • Native iOS or Android apps
  • Go, Rust or embedded C++ codebases

Price Fixed price per feature or a weekly contract rate. Quoted after a 20-minute call.

FAQ

Can you work inside our team?

Yes. We join your Slack, repo and standups like any team member.

Who owns the code?

You do, from the first commit.

Can you take over an AI-built prototype?

Yes. We often start from Lovable or Bolt code and make it production-ready.

Tell us what you're building.

20 minutes, no pitch deck needed. You leave with a clear next step, even if it isn't us.

Book a 20-min call