QalbIT uses TypeScript as a foundation for Node/NestJS backends, React/Next.js frontends and shared type libraries. Typed contracts between services and UIs make complex products easier to evolve without breaking existing behaviour.
APIs · Web Apps · SDKs
Typically responding within 24–48 hours. Share your current tech stack, product stage and timelines.
TypeScript development overview
We help teams adopt or improve TypeScript so their APIs, web apps and internal tools are easier to reason about, refactor and support long term.
We rarely recommend “rewrite everything in TypeScript” overnight. Instead, we adopt TypeScript incrementally – starting with the highest-value areas and new modules.
What we build with TypeScript
We use TypeScript as a core layer across backend and frontend so your product benefits from strong typing end to end.
APIs
Type-safe REST and GraphQL APIs using Node.js and NestJS, with shared types for requests, responses and domain models.
Frontends
Typed React and Next.js applications with strict props, hooks and state definitions to catch issues early in development.
Shared types
Central type packages and lightweight SDKs that keep multiple services, apps and integrations aligned.
Modernisation
Incremental migration strategies for existing JavaScript projects, starting with critical modules and new code.
Want to see how these capabilities map to your product? Share a quick overview and we will respond with a practical next step.
Talk through your TypeScript requirements →How TypeScript projects work with QalbIT
We design TypeScript adoption around your existing stack, team and roadmap, rather than forcing a one-size-fits-all pattern.
1–2 weeks
Review your current JavaScript/TypeScript usage, build tooling, APIs and frontends to understand risks and opportunities.
Key outcome: Clear picture of what should be typed, improved or left as-is for now.
1–2 weeks
Define TypeScript configuration, strictness level, project structure and coding guidelines that match your team and roadmap.
Key outcome: Agreed TypeScript setup and patterns to follow across the codebase.
4–10+ weeks (scope-dependent)
Introduce or tighten TypeScript in priority areas – new features, core modules, domain models – while keeping delivery moving.
Key outcome: Key parts of your system using stronger typing and shared contracts.
2–4 weeks
Wire TypeScript checks into your CI, add targeted tests and ensure type errors are caught before they reach production.
Key outcome: TypeScript integrated into your build and review pipelines.
Ongoing, month-to-month
Support your team with ongoing TypeScript-based feature work, refactors and coaching so practices stick long term.
Key outcome: A team and codebase that use TypeScript confidently and consistently.
Want to see how this process applies to your current stage? Share a short brief and we will respond with a tailored next step.
Walk me through this for my codebase →Where TypeScript adds the most value
We typically use TypeScript where correctness, collaboration and long-term maintainability matter most.
For SaaS founders and product teams
Products with multiple services, dashboards and roles that depend on shared domain models and clear contracts.
For Operations, data and engineering teams
Internal web apps and APIs where different teams depend on stable interfaces and predictable behaviour.
For Platform and integration teams
Platforms that expose APIs or SDKs to customers or partners, where type safety improves developer experience.
For Teams with legacy JS
Existing Node or React applications that need to be stabilised, refactored and gradually migrated to TypeScript.
Not sure if your idea or system belongs here? Send us a short description and we will tell you honestly whether we are the right team for it.
Ask if TypeScript is a fit for your product →Tech stack & tooling
We treat TypeScript as a first-class citizen in our Node, React, Next.js and NestJS projects, backed by modern tooling.
How we configure and structure TypeScript projects.
Typed backends and services.
Typed user interfaces with React and Next.js.
Keeping TypeScript code healthy over time.
Already using JavaScript? We will introduce TypeScript where it clearly improves safety and developer experience, instead of forcing it everywhere on day one.
Practical answers about using TypeScript for APIs, web apps and modernising existing JavaScript codebases.
Have a question that is not listed here?
Share your roadmap or idea and we’ll help you pick the right engagement model, tech stack and starting point.
Contact our expertsTypeScript is a typed superset of JavaScript that adds static type checking and modern language features. It helps catch many errors at compile time, makes refactoring safer and improves tooling such as autocompletion and navigation, especially in medium to large codebases.
TypeScript is especially useful for long-lived products such as SaaS platforms, internal tools, APIs and web applications with multiple developers. Anywhere you have complex domain logic, shared data models or frequent changes, types help keep behaviour predictable as the system grows.
Yes. We almost always recommend a gradual migration. We start by setting up TypeScript and adding types to critical modules, new features and shared domain models. Over time, more of the codebase is typed as you touch it, instead of trying to convert everything in one big, risky step.
No. A basic understanding of types is enough to start. We set up sensible TypeScript defaults, introduce patterns that match your stack and coach your team through real work. Developers usually become comfortable quickly because the types and editor tooling provide immediate feedback.
TypeScript works very well with modern frameworks. React and Next.js have strong TypeScript support for components, hooks and routing, while Node and NestJS use TypeScript extensively for APIs and services. We often share common types between these layers so contracts stay in sync.
There can be a small learning curve initially, but over time TypeScript usually speeds teams up. You spend less time chasing runtime issues caused by simple type mismatches and more time implementing features, because refactors and integrations are safer and better guided by the compiler.
Yes. We often create shared type or contract packages that define domain models, request/response shapes and enums used across backends, frontends and internal tools. This reduces duplication, avoids drift between services and improves developer experience for everyone working on the product.
We add TypeScript compilation and type checks to your CI pipeline alongside tests and linting. This ensures that broken types or missing definitions are caught before changes are merged, keeping the main branches stable and the team confident in deployments.
We do both. We are happy to start greenfield TypeScript projects with a clean architecture, and we also join teams that already use TypeScript but need help tightening configurations, cleaning up types, structuring shared libraries and improving build and testing workflows.
You can share your current stack and repositories with us, along with the main challenges you are facing. We typically begin with a short audit and recommendations, then either tackle an initial improvement sprint or support you with ongoing TypeScript-based feature development and refactors.
Planning to rely more on TypeScript?
Whether you are starting a new product in TypeScript or modernising an existing JavaScript system, we can help you design the right level of typing, tools and migration steps so your team benefits without being blocked.
Share your stack, repositories and main pain points, and we will come back with a practical TypeScript plan.