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2 engineers free · available now

Hiring a full-stack JavaScript developer takes four months. Or two weeks.

Dedicated full-stack JavaScript engineers who own features from the React or Next.js interface through Node.js APIs to the database: interviewed by you, trialled on a real ticket, released with thirty days notice.

The cost of an empty seat is never on the invoice, but it is the biggest number in this comparison.

  • 48h

    To real profiles

  • 2 wks

    Paid trial sprint

  • 30 days

    Notice to stop

  • 0

    Recruiter fees

Get your free estimate

Three quick questions: scope, approach and a price range back within 48 hours. No sales call required first.

What do you need built?
When do you want to start?
Where should we send the estimate?

Answer all three questions above, then send.

NDA-friendly · IP yours from day one

Trusted by companies worldwide

  • Bloomford
  • Contractor Plus, Inc.
  • Snappy Stats
  • Ad Lunam
  • Local Buzz
  • CyberFind
  • Hellory
  • 5.0Clutch · 8 client reviews
  • 4.9Google · 18 reviews
  • Top ratedUpwork · 100+ reviews · 5K+ hours worked
  • TopTracker7K+ hours tracked with clients

How hiring works

Weeks until code is shippingSeniority

  • Post the role yourselfAdvert, screening, interviews, notice period
    14 wks
  • Freelance marketplaceFast to start, unknown until they ship
    3 wks
  • A QalbIT engineerProfiles in 48 hours, paid trial sprint
    2 wks

Mid-level full-stack JavaScript engineer

That is 12 weeks of an empty seat you do not pay for.

Ships a feature end to end: UI, API and migration, against a clear spec, writes the tests, and holds a vertical slice without hand-holding.

Request profiles →

In-house timings from published hiring benchmarks · QalbIT timings from our own last twelve placements

TypeScript end to end. React · Next.js · Node.js. One hire, whole features. REST, GraphQL & background jobs. You interview every engineer

Full-stack JavaScript overview

When hiring full-stack JavaScript developers with QalbIT makes sense.

We work with teams that want one accountable squad instead of separate front-end and backend silos: faster on features and lighter on coordination. Most of them end up with a standing team on your board.

  • Most of your stack is TypeScript

    React or Next.js in front, Node.js behind: one language, and you want one engineer who owns both ends of a feature.

  • Handoffs are where your features stall

    The front end waits on the API, the API waits on the schema. You need vertical ownership under tight timelines.

  • You want a simpler hiring profile

    A strong full-stack squad beside a small internal core, instead of two specialist searches for every seat.

Your team, one shared board, developers joining
Every developer sits inside our delivery system

What our full-stack JavaScript developers deliver

Full-stack JavaScript capabilities from UI to database.

Complete features, from React and Next.js interfaces through Node.js APIs to the data model, owned by one squad.

  1. End-to-end feature development

    Features that span front end, backend and database changes, designed and shipped by one team.

  2. Greenfield product builds

    From first architecture to v1 launch on React or Next.js, Node.js with NestJS and a relational database.

  3. Modernising legacy stacks into TypeScript

    Gradual migration from older stacks into a modern JavaScript and TypeScript architecture, slice by slice.

  4. API design, integrations & background jobs

    REST and GraphQL APIs, external integrations and workers in Node.js.

  5. Performance, caching & scalability

    Caching strategies, query optimisation and scaling approaches tuned to real usage.

  6. Monitoring & DevOps collaboration

    Logs, metrics and tracing across the stack, with your DevOps team or in their place.

Want to see how these capabilities map to your product? Share a spec or a repo and we will respond with a written road map.

Talk through your full-stack needs →

How it works

A practical process for hiring and working with full-stack JavaScript developers.

Architecture and ownership are agreed first, so the squad moves quickly without chaos.

  1. Share the role and the codebase

    A short call on your product, stack, timelines and the seniority mix you actually need.

    48 hours

  2. Meet shortlisted developers

    Two or three profiles with real project history. You interview them yourself, no bench-warming.

    Within a week

  3. Paid trial sprint

    The developer works a real ticket in your repo: a whole feature, UI to migration. If the fit is wrong, you stop and pay only for that sprint.

    Two weeks

  4. Scale up or down

    Add engineers as the roadmap grows, release them with 30 days notice when it does not.

    Ongoing

Our clients · reviews

Teams who trusted QalbIT

Short feedback from clients and products we work on across web, mobile, SaaS and internal tools.

  • Testimonials from long-term custom software development and SaaS product clients.
  • Covers ERP systems, B2B marketplaces, booking platforms, and web & mobile app development projects.
  • Real text and video reviews from founders, CTOs, and product teams who partnered with QalbIT for delivery.

  • Video review

    Rated 5 out of 5.
    “I would recommend QalbIT to everybody. QalbIT has been developing all my front-end & backend systems complete to my requirements. They have excellent technical knowledge and listen very well to the needs of their customers. And above all, they are great people.”
    Wouter SantensExecutive Search Consultant · Bloomford

  • Written review

    Rated 5 out of 5.
    “Excellent work! QalbIT team delivered the project on time, with great quality. Their ability to quickly adapt to new requirements and deliver promptly was impressive. Highly recommend them for Flutter projects.”
    Ahmed GFounder at Local Buzz · Consumer app / local discovery

  • Video review

    Rated 5 out of 5.
    “QalbIT quickly integrated four payment platforms: Square, Stripe, PayPal and Coinbase. Active communication, timely deadlines despite research-heavy work, plus post-launch support.”
    Roshan SethiaCTO · Contractor Plus, Inc.

  • Written review

    Rated 5 out of 5.
    “They took a half-finished marketplace, stabilised it, and shipped the modules we actually needed first. The weekly demos meant nothing came as a surprise.”
    Abhishek P.Product Lead · B2B marketplace

  • Written review

    Rated 5 out of 5.
    “QalbIT is a fantastic dev partner. They provide quality work, good communication and go above and beyond. Fantastic work delivered by QalbIT and his team. Can’t give enough credits with regards to how they work and at which speed they do it. Top team.”
    Joost HesselberthFounder · Ad Lunam

Where full-stack JavaScript fits best

Full-stack JavaScript use cases we most often deliver.

The biggest gains come when a full-stack squad owns a product or a vertical end to end.

  • New product initiatives

    New products or modules where one squad goes from idea to production quickly.

  • Rebuilding vertical slices of legacy apps

    Specific flows or modules of an older system replaced with modern full-stack implementations.

  • Feature delivery for existing TypeScript products

    A squad beside your internal team, focused on shipping complete features faster.

  • Growth & experimentation engineering

    Experiments that need quick end-to-end changes, measured and rolled back cleanly.

Tech stack & platforms

The stack our full-stack JavaScript developers typically use.

A modern JavaScript and TypeScript stack that balances speed of delivery with long-term maintainability.

  • Front ends

    • React and Next.js for product-grade interfaces
    • TypeScript throughout, shared types across the stack
    • Tailwind CSS and component-driven development
    • Server and client rendering chosen per surface

  • Backends & services

    • Node.js with NestJS, Express or Fastify
    • REST and GraphQL APIs designed for long-term use
    • Background jobs and workers with BullMQ
    • Authentication, roles and rate limiting done properly

  • Data & infrastructure

    • PostgreSQL or MySQL with Prisma or Drizzle migrations
    • Redis for caching, queues and rate limiting
    • Docker, CI/CD and AWS, GCP or DigitalOcean
    • Preview environments for every pull request

  • Quality, security & observability

    • Vitest, Playwright and supertest on critical flows
    • ESLint, Biome and code review as routine
    • Logging, metrics and tracing from the first sprint
    • Dependency and secret scanning in CI

If you already have preferred tooling or platforms, we adapt to those rather than forcing a specific stack. A precise stack is agreed per project.

How we work

A product engineering culture built on ownership and clarity.

The habits that decide whether software still works in year three. Here is the honest comparison: what most outsourced engagements look like, and what changes when you work with us.

How an engagement with QalbIT compares
The questionThe usual answerAt QalbIT
Who scopes itA salesperson, then a handover docThe founder and the engineer who will build it
Who writes the codeWhoever is on the bench that monthNamed senior engineers, in our office, no subcontractors
What you see weeklyA status deck and a percentageA working demo and the board it came from
When something breaksA ticket queue and an account managerThe engineer who wrote it, in your timezone overlap
If you want to leaveA migration project and a licence conversationThirty days notice · repos and IP were always yours

  • Principle 01

    Ownership over ticket-taking

    Engineers who ask why before they ask which framework. Scope questions come back before code goes out.

  • Principle 02

    Written over remembered

    Scope, estimates and architecture decisions are written down with the trade-off stated. Nobody relies on what was said on a call.

  • Principle 03

    Small over staffed

    Senior pods that hold the whole system in their heads beat large mixed teams that need a coordinator to function.

Engagement models

Three simple ways to work together.

Not sure which fits? Adding engineers to a team you already run is staff augmentation; handing a whole roadmap to a dedicated product team sits at the other end of the same scale. Tell us the roadmap and we will recommend one honestly, including when hiring in-house is the better answer.

  • Model 01

    Dedicated developer

    One or more engineers full-time on your product, managed by you day to day with QalbIT quality oversight.

    Best for · ongoing roadmaps with a product owner

  • Most chosen

    Dedicated squad

    A cross-functional team, developers, QA and a technical lead, owning your delivery end to end.

    Best for · products with no in-house engineering yet

  • Model 03

    Fixed-scope pilot

    A clearly bounded module or audit with agreed cost and timeline: the lowest-risk way to start.

    Best for · testing us before a longer commitment

Built for reliability

Freelancer flexibility. Company-level accountability.

Every dedicated developer works inside QalbIT delivery: the same system behind our own SaaS products and 120+ client projects.

More developer profiles

Pick the expertise your roadmap needs.

Every hire is a senior, product-minded engineer backed by our delivery team, not a solo contractor. Start with one developer or assemble a full squad.

Keep exploring

FAQs · hiring full-stack JavaScript developers

Frequently asked questions about hiring full-stack JavaScript developers

These are the questions founders, CTOs and product teams usually ask when they consider hiring a full-stack JavaScript squad instead of separate front-end and backend teams.

Ask us directly →
Most engagements start within one to two weeks of the first call. Profiles land within 48 hours, and if the right seniority is free it can be faster.
For a feature that spans UI, API and data, yes, and faster, because nothing waits on a handoff. For deep specialist work, a design system or a high-load service, we say so and suggest a specialist alongside.
Yes, always. You get two or three profiles with real project history and you run the interview. Nobody joins your team without your sign-off.
The first two weeks are a paid trial sprint on a real ticket in your repo. If the fit is wrong you stop there and we replace them at no extra cost.
React or Next.js in front, Node.js with NestJS, Express or Fastify behind, TypeScript throughout, and PostgreSQL or MySQL underneath. If you already have preferred tooling, they adapt to it.
Dedicated full-stack engineers are billed monthly by seniority, with a written rate before you commit. Repositories, cloud accounts and IP are in your name from day one under NDA.
Yes. Add engineers as the roadmap grows, release them with 30 days notice when it does not. No annual lock-in.

Next step

Let’s plan a full-stack JavaScript squad around your roadmap.

Share your current stack, roadmap and bottlenecks. We will propose how a squad plugs in, what it should own and what to expect in the first three to six months.

Book a full-stack discovery call

Further reading