Custom software development
Software products built on a modern stack, and built to last
We design and build web and mobile applications, SaaS platforms, customer portals, APIs and the backends behind them, with Next.js, the MERN stack, FastAPI, Flutter and other current architectures. Performance, accessibility and security are checked on every release.
Technology we use for this work
The problem
Most software is easy to launch and hard to live with
An application that looks finished on launch day can still be slow on a phone, hard to use with a keyboard or screen reader, leak data between customers, lose background jobs and break whenever backend and frontend drift apart.
We choose the architecture for what the product has to do, not for what is fashionable. Specifications come first, contracts are enforced by the build, and every release is held to measured bars for speed, accessibility and security, so the product stays maintainable after we hand it over.
What we build
What does our custom software development service include?
Web and mobile apps, SaaS platforms, APIs and backends on Next.js, MERN, FastAPI and Flutter.
Web applications
Next.js with the App Router and React Server Components, or the MERN stack of MongoDB, Express, React and Node.js, with rendering chosen per page so content is fast and data stays fresh.
Mobile applications
Flutter for iOS and Android from one codebase, including offline-first apps that keep working, and keep data on the device, without a connection.
SaaS platforms and portals
Multi-tenant SaaS, customer and partner portals and internal tools, with workspace isolation enforced in the database, roles, billing through Stripe and audit trails.
APIs and backends
FastAPI, Node.js and NestJS services with REST, GraphQL or tRPC, and typed contracts generated from one source so backend and frontend cannot drift.
Durable jobs and streaming
Queues with leases and bounded retries so heavy jobs survive crashes and page refreshes, and resumable streams with a plain request fallback.
Marketing and content sites
Fast, search-friendly sites built with Astro or Next.js and a headless CMS such as Sanity, so your team edits content without a developer.
Performance and SEO
Core Web Vitals budgets checked in the build, structured data, sitemaps and server rendering, so pages load fast and are understood by search engines and AI assistants.
Accessibility and multilingual
WCAG 2.2 AA as the baseline, checked automatically on every page, with internationalization that includes right-to-left layouts for Arabic and Urdu.
AI features in the product
Chat, search, summarization and agent features built into the application, connected to the same evaluation and tracing as the rest of our AI work.
Specification-driven delivery
A written specification above the code and a traceability file linking each feature to the requirement it satisfies.
Delivery
How a project runs
-
Discover
Scope and architecture
- Users and journeys
- Platforms and data strategy
- Fixed scope and timeline
-
Design
Interface and system
- Wireframes and prototypes
- Design tokens and components
- Accessibility from the start
-
Build
Application
- Typed frontend and backend
- Tests alongside features
- Preview build per change
-
Ship
Release gates
- Performance budgets
- Accessibility and security checks
- End-to-end tests
-
Operate
Run and improve
- Monitoring and error tracking
- Analytics with consent
- Handover or ongoing support
- Strict TypeScript and typed Python, with shared types for every API contract
- Tenant isolation enforced in the database, not only in application code
- Automated accessibility checks on every page, not a one-off audit
- Performance budgets for Core Web Vitals that fail the build when exceeded
- Security headers, a content security policy and dependency scanning by default
- Code, infrastructure and content in your accounts from day one
Proof
Where have we delivered this?
Conversational BI for teams with no data team
Connect a spreadsheet or database and come back to a dashboard that already means something, then reshape it by asking in plain language.
Result: 100% of model calls routed through one traced gateway
Read the case studyA personal finance app that never phones home
Ten feature areas across iOS and Android, storing every record on the device, with no backend, no login and no transaction data leaving the phone.
Result: 0 servers, accounts or network calls holding user data
Read the case studyAn AI equity research platform that cites every claim
Enter the ticker of a US-listed company and the platform reads five years of filings, earnings call transcripts and market data, then writes a cited memo with growth signals.
Result: 100 names tracked with the same depth every quarter
Read the case studyContext
Industries and related services
Related services
FAQ
Custom software development: common questions
Do you build full products or only AI components?
Both. Several of our case studies are complete products, from specification through backend, AI layer and front end, including a multi-tenant SaaS platform and a mobile app on iOS and Android.
Should we use Next.js or the MERN stack?
They overlap more than the names suggest: a MERN application often uses Next.js for its React layer. Next.js suits products where search visibility, page speed and server rendering matter. A separate Express or NestJS API on MongoDB suits products with a large backend, several clients or a mobile app sharing the same API. We recommend one in the first phase, with the reasoning written down.
How do you keep backend and frontend in sync?
Contracts are defined once, typically in Pydantic or TypeScript, and the types on the other side are generated from them. Drift between the two fails the build instead of surfacing as a runtime bug.
Can you take over and improve an existing application?
Yes. We start with a short review of the code, performance, accessibility and security, then propose fixes in order of impact. Rewrites are a last resort, not a default.
Where is the application hosted?
Wherever suits your constraints: Vercel or Cloudflare for speed of delivery, or AWS, Google Cloud, Azure or your own servers when data residency or existing contracts require it. Everything runs in your accounts.
How long does a project take?
A marketing site typically takes a few weeks, and a first release of a web or mobile application or SaaS platform usually takes a few months. We commit to a timeline after a fixed-scope first phase, not before.
Start with a two to three week assessment.
Send us the problem and the constraints. You get a written architecture, a risk register and a costed roadmap, and you keep them whatever you decide next.