FinTech · SaaS
Automated multi-exchange crypto trading platform
Crypto trading SaaS
Node.jsAngularMongoDBWebSocketFirebaseGCP
Node, React & Angular
Node, React and Angular work that holds its shape.
You're hiring by stack name, which is a reasonable way to start. What matters later is whether the TypeScript still describes reality and the state model makes sense.
The brief, honestly
The JavaScript half of the house, in TypeScript.
Briefs arrive shaped like a job posting: a React front end, an Express service, an Angular dashboard somebody inherited. Underneath, the question is always the same. Can the next person reading this file tell what it does without opening the rest of the folder?
So the first thing we do is inventory: which components actually exist, which ones quietly do the same thing, where state lives and who is allowed to change it. Then we put the types in front. A shared type layer between the client and the server catches the mismatch at build time instead of in support.
Angular and React get the same treatment, because the discipline is not framework-specific. Modules with one job, state management chosen deliberately rather than by habit, and a component library the design side can use without asking us. None of that is clever — that is the point.
Problem 01
We need React capacity for one quarter, not a hire.
Then buy the capacity, not the headcount. Engineers who already work in TypeScript daily, scoped to your sprint, and you scale it down when the quarter ends.
Problem 02
Our Angular dashboard is stuck on an old version.
We inventory what depends on what, upgrade in steps that each ship on their own, and keep the app running the whole way rather than branching off and hoping.
Problem 03
Every team built their own button component.
One component library, versioned, with the variants your designers actually asked for. Then the old buttons get deleted, which is the part most teams skip.
Problem 04
The front end and the API disagree constantly.
Shared types generated from one source, so a renamed field breaks the build instead of a customer's screen — state management then has one place to be wrong.
What's included
Scope, spelled out.
TypeScript across the stack
Types that describe what the code actually returns, shared between the browser and the server so both sides break at the same time.
React application work
Feature work in an existing React app or a new one: routing, data fetching, forms that behave, and rendering that doesn't thrash.
Angular application work
Angular front ends built or rescued: modules, dependency injection, streams that read cleanly, and upgrades taken one version at a time.
Node.js and Express services
Express services with real error handling, sensible logging, and a route layer thin enough that the business rules are testable on their own.
Component libraries
A versioned component library with the states designers forget: loading, empty, error, disabled. Documented so nobody rebuilds the button again.
State management
One deliberate answer to where state lives, chosen for the app in front of us rather than for the framework's current fashion.
Build and CI performance
Bundle size, type-check time and CI minutes treated as things we measure and reduce, because a slow build slows every future change.
How we work
What actually happens, week by week.
01
Inventory
We list the components, the state and the dependencies, then mark what is duplicated or dead.
02
Type it
A shared type layer between client and server, so the two stop disagreeing at runtime.
03
Library
The component library goes in early, with every state documented, before feature work multiplies.
04
Wire up
Data fetching, error states and one deliberate state model, each reviewed as it lands.
05
Measure
Bundle size, type-check time and CI minutes, benchmarked at the start and again at handover.
Tech stack
The tools we actually use here.
This is the JavaScript side of what we run. MEAN stack work sits in here, and so does the plain TypeScript service with no framework in it at all. We match your versions, not ours.
TypeScriptJavaScriptNode.jsMEAN stackReactAngularPreactMongoDBPostgreSQLMySQLTailwindCSSSCSSFirebase AuthGoogle Cloud
What you get
Deliverables, outcomes and who this is for.
Deliverables
- Component and state inventory
- Shared TypeScript type layer
- Versioned component library with docs
- Express service with tests and logging
- Bundle and CI performance numbers
Outcomes
- A renamed field breaks the build
- One state model, not several
- Designers and code share one library
- Faster builds, smaller bundles
Ideal client
Product teams adding JavaScript capacity by name, or rescuing a TypeScript codebase that grew faster than its structure.
Proof
Where the JavaScript did the hard part.
Education · SaaS
Multi-city sports academy fee collection
Sports academy (multi-city)
SlimReactMySQLTailwind
Why the trading platform is MEAN, end to end
Node.js and MongoDB on the server, Angular in TypeScript on the front, and live exchange data arriving over WebSocket. The interesting constraint was the browser: order books and balances updating continuously without the dashboard re-rendering itself into the ground. Change detection is where you earn that.
The academy front end was React on a PHP API
React and Tailwind in front, a PHP API behind, and the awkward part in the middle: bulk student imports, part-payment rules that vary by center, and a public page parents use without an account. Most of the work was making one form tolerate every combination the admin side could configure.
Frequently asked
Questions we get on the first call.
Yes, and you should. Ask for the codebase they last worked in, and make them explain a decision they regret. We'd rather lose the engagement at the interview than after your team has restructured a sprint around someone who can't keep up. Interview them like a hire.
No. Nobody is equally strong in both, and a vendor who claims otherwise is selling. Both are genuinely in our history: the trading platform is Angular in TypeScript, the academy front end is React. What they share is structure, which is the part that survives. Ask us about the one you run.
There is no minimum we won't discuss, and scaling down is expected rather than penalised. Work comes in waves: a heavy build quarter, then a quiet one. Notice period and the rest of the commercial terms sit on the Dedicated Developers page, because they are the same terms whatever the stack.
Both, and the split gets agreed with your lead rather than fixed on a web page. Our office sits in Vadodara; the teams we work with sit in 5 countries, so part of the day always overlaps and part of it never will. Standups and reviews we join live. The rest is written down.
That's most of what we do. The first week is read-in, not commits: we run it, list what is missing, and tell you which half is worth keeping. Sometimes the honest answer is that a module should be rewritten rather than continued, and we say so before you pay us to nurse it.
Related services
More in Full-Stack Team on Demand.
Add JavaScript engineers who stick around.
Interview the engineer, not a salesperson. Thirty minutes, your repo on screen, and an honest read on what the front end actually needs.