Backend & APIs
ASP.NET Core and Node.js services, REST and real-time APIs, background workers, integrations with third-party systems, and databases designed for the reports you will actually run.
Service 04
Custom software, web and mobile development — backend to app store, one team.
We design and develop software tools and applications for companies and end users around the globe. The same engineers who build our trading and payment systems build products for teams outside finance, with the same discipline.
- Backend
- C# / .NET · Node.js · SQL Server · PostgreSQL
- Web
- React · Next.js · TypeScript
- Mobile
- Flutter · Android (Kotlin) · iOS (Swift)
- Cloud
- AWS · Azure · Docker · CI/CD
What we build
From the database to the app store.
Web applications
Customer portals, admin consoles, dashboards and SaaS products in React and Next.js — fast, accessible, and built on a design system you can extend.
Mobile applications
Flutter for one codebase across Android and iOS, or native Kotlin and Swift when the product needs it. Store submission, push notifications, offline-first where required.
Desktop tools
Windows applications and services for operations teams — the kind of internal tooling that replaces spreadsheets and manual steps.
Cloud & DevOps
AWS and Azure deployment, containers, CI/CD pipelines, monitoring and alerting, backups and disaster-recovery runbooks.
Integration & migration
Connecting systems that were never meant to talk, and moving products off legacy stacks without a big-bang cutover.
Stack
Proven tools, chosen per project.
We default to a small number of technologies we run in production ourselves. When a project needs something else, we say so up front rather than bending the wrong tool.
- Backend: C# / .NET 8, Node.js, SignalR, SQL Server, PostgreSQL, Redis
- Web: React, Next.js, TypeScript, Tailwind or a bespoke design system
- Mobile: Flutter, Kotlin, Swift
- Cloud: AWS, Azure, Docker, GitHub Actions, monitoring and alerting
- Data & ML where it earns its place: LightGBM, ML.NET
Discovery, 1–2 weeks
Workshops, written specification, wireframes and an estimate you can hold us to.
Build in phases
A working release at the end of every phase, demoed on your environment.
Launch
Deployment, store submission, monitoring, documentation and handover.
Run
A monthly engineering block for what comes next, or a clean handover to your team.
Recent shapes of work
What a project usually looks like.
Client portal for a financial service
Onboarding, documents, statements and support in one web app, on a .NET API with an encrypted document store.
Consumer mobile app with a cloud backend
Flutter front end, .NET backend, push notifications, in-app purchases and store release on both platforms.
Legacy system replacement
A phased rewrite of an internal desktop tool into a web application, running side by side until cutover.
Questions
Asked before every project.
Do you work with clients outside finance?
Yes. About half of our custom software work is for companies with nothing to do with trading or payments — the fintech discipline simply carries over.
Fixed price or time and materials?
Both. Fixed scope for well-defined products after a written specification; a monthly engineering block for products that keep evolving.
Who owns the code?
You do, for commissioned work. Source, repositories, CI configuration and cloud accounts are yours; we hand over documentation and can stay on for support.
Can you take over an existing codebase?
Yes. We start with a review — architecture, tests, deployment — and a written plan before changing anything.
Do you do design as well?
UI and UX design is part of every product build: wireframes, clickable prototype, then a design system the code is built from.
How do you handle time zones?
We work from India with overlap across European and US business hours guaranteed in the contract, a named point of contact, and written updates at least weekly.
Have a product to build or a system to rescue?
Send the brief, the codebase or just the idea. You will hear back from an engineer within one working day.