Backend Engineering
The server-side systems, data layers, and APIs that your web applications, mobile apps, and integrations depend on — built for reliability, security, and scale.
The Real Problem
Many products start without a real backend. The mobile app reads from a Google Sheet. Orders arrive on WhatsApp. A few PHP files handle everything, glued together with global state and no clear data model. It works — until it does not.
As usage grows, the cracks appear. Requests slow down under load. Data becomes inconsistent because there are no validation rules enforcing it. Adding a new feature means untangling existing code that was never meant to be extended. A second client application — say, a mobile app alongside an existing web dashboard — becomes a project in itself because the backend was not designed with shared access in mind.
Third-party integrations compound the problem. Without a proper API abstraction layer, every new integration — a payment gateway, an accounting system, a logistics provider — is wired directly into application code, making the system brittle and hard to reason about.
The common root: the backend was built to get something running, not to be built upon. At some point, the cost of patching outweighs the cost of rebuilding properly.
Deliverables
Backend engagements with Upotto cover the full server-side stack — from database schema and business logic to API documentation your team can actually use.
Primary Framework
NestJS is TypeScript-native, which means type errors are caught at compile time rather than discovered in production. Its module system enforces clear boundaries between features — auth lives in one module, orders in another — so the codebase stays navigable as it grows. Dependency injection is built in, making services easy to swap, test, and extend without rewriting call sites.
The decorator-based approach to routing, validation, and serialisation keeps endpoint definitions concise and consistent. OpenAPI documentation is generated from the code itself, so it does not drift. NestJS is Upotto's backend standard — it powers the API layer of Upotto ERP, where complex business rules, multi-role access, and background job processing all run through the same architecture.
Capabilities
Upotto's primary backend framework. TypeScript-native, decorator-driven, with built-in dependency injection, clear module boundaries, and a structure that scales cleanly as a codebase grows.
When a project calls for PHP, Laravel delivers a mature ecosystem with Eloquent ORM, robust routing, and a large body of proven packages — particularly suited for content-heavy and e-commerce backends.
Lightweight Node.js services for real-time features, streaming, or utility microservices. Used standalone or alongside a primary NestJS application.
Proper relational schema design — normalised tables, correct indexing, foreign-key constraints, and query optimisation — so the database does not become the bottleneck as data grows.
JWT access/refresh token flows, session-based auth, and OAuth integration (Google, GitHub, etc.). Stateless or stateful — matched to the application's deployment model.
Granular RBAC middleware that gates routes, data, and actions by user role. Covers scenarios from simple admin/user splits to multi-tier permission hierarchies.
Redis-backed task queues for report generation, notification dispatch, file processing, and any workload that should not block an HTTP response. Includes retry logic and dead-letter handling.
Structured file upload pipelines, storage integration (local or object storage), image processing, and secure pre-signed URLs for serving assets without exposing direct storage paths.
Request throttling, IP allow/deny lists, CORS policy, and input validation layers applied consistently across endpoints — not bolted on as an afterthought.
Versioned API routes (/v1, /v2) and auto-generated OpenAPI/Swagger documentation so every endpoint has a contract your frontend and third-party partners can build against confidently.
Use Cases
A single REST API serves both iOS and Android builds. The mobile app does not need separate integrations — it talks to one backend, regardless of platform.
Subscription tiers, tenant isolation, per-plan feature gating, and usage tracking all live in the backend layer — keeping the frontend thin and portable.
When you have a web dashboard, a mobile app, and a partner portal, they all consume the same API. No duplicated data-access code; one update propagates everywhere.
Giving internal tooling direct database access creates security and coupling risks. A thin internal API layer enforces business rules and access controls even for back-office tools.
Commission calculations, approval workflows, dynamic pricing rules, and inventory allocations belong in the backend — not scattered across client-side code where they are hard to audit or change.
When the original codebase is a bottleneck — slow responses, brittle endpoints, no documentation — we review the existing system and redesign the backend incrementally without forcing a full rewrite.
Technology
We use the same core stack across projects — which means we know its edge cases, its performance characteristics, and the right patterns for common problems. No exotic choices that create hiring or maintenance risk for you.
Runtime / Framework
Language
Database
Queue / Cache
Auth
Deployment
Documentation
API Style
How We Work
A structured approach that keeps projects on track without unnecessary ceremony.
We learn how your business operates, what the current pain points are, and what success looks like. No assumptions.
Define the technical scope, system architecture, data model, and integration touchpoints before writing a line of code.
Design interfaces that your actual users — operators, managers, field staff — can navigate without training.
Iterative builds with regular check-ins. You see working software early, not just status reports.
Functional, integration, and edge-case testing. We fix issues before they reach your users.
Production deployment with proper environment configuration, data migration support, and go-live assistance.
Post-launch monitoring, bug fixing, and feature iterations as your operations evolve.
Why Upotto
The Upotto ERP backend is not a demo project — it handles live orders, stock movements, commission calculations, credit approvals, and multi-role access for real distribution businesses. That experience informs how we approach every backend we build.
Built for real business rules
We have implemented commission engines, approval workflows, and dynamic pricing logic inside Upotto ERP. We know how to model complex domain rules in a backend without turning the codebase into a maze.
APIs designed for multiple consumers
We design API contracts that web clients, mobile apps, and third-party integrations can consume without custom shims for each. One API, consistent behaviour across all clients.
Documentation is not optional
Every API we deliver comes with OpenAPI documentation generated from the codebase. Your team can build on it immediately, and the docs stay accurate because they live in the code.
Modular, not monolithic spaghetti
NestJS modules enforce separation of concerns by design. Features are isolated. Adding a new capability does not require touching unrelated parts of the system.
Related Services
Flutter mobile apps that consume the APIs we build — field tools, sales apps, client portals.
Explore serviceConnect your backend to third-party APIs, payment gateways, accounting systems, and external data sources.
Explore serviceMulti-tenant SaaS backends with subscription logic, tenant isolation, and scale-ready architecture.
Explore serviceFAQ
Tell us about your application — what it needs to do, what it currently runs on, and where the pain points are. We will come back with a clear plan.
