BACK-END DEVELOPMENT

A backbone built to stay up when it matters most

We build secure, scalable backend architectures, database models, and RESTful APIs — server configurations, authentication layers, and data pipelines built to ensure high uptime and reliability.

100%
of traffic your backend needs to handle correctly — the moment it can’t, every front-end feature built on top of it stops working too
0
the acceptable number of unhandled failure states in an authentication or payment pipeline
The problem

Backends that work in testing often fail under real traffic

A backend built without production load in mind tends to work fine right up until it doesn’t — a traffic spike, a poorly indexed database query, an API that wasn’t built to handle concurrent requests. By the time it fails, it’s usually during the exact moment the business needed it most.

Security gaps compound the risk: authentication built without proper hashing, APIs without rate limiting, and data pipelines without validation are the kind of issues that don’t show up until they’re exploited, at which point the cost is far higher than building it correctly the first time.

What we do

Scalable architecture

Backend structures designed to handle real production load, not just enough to pass a demo.

Solid database modeling

Data models designed with query performance and integrity in mind from the start, not patched later.

RESTful API development

Clean, well-documented APIs built to a consistent standard, making integration straightforward.

Authentication & security

User authentication and data handling built to modern security practices, not shortcuts.

Full scope

What's included in every back-end engagement

One clear scope, whether it’s a new build or scaling an existing system.

Architecture & system design

Database design & modeling

RESTful API development

Authentication & authorization

Server configuration & deployment

Data pipelines & background jobs

Third-party service integration

Performance & load optimization

Security hardening & auditing

API testing & documentation

Monitoring & uptime alerting

Ongoing maintenance & scaling

What proper back-end development gives you

A system built to stay reliable, not just to work in a demo.

uptime targeted through proper architecture and monitoring
0 %+
of API endpoints documented and tested before handoff
0 %
unhandled failure states in authentication or payment flows
0
guesswork — every architecture decision made for real production load
0
How we do it

Architected, built, secured

01

Design the architecture

System architecture and data models planned for real production load before any code is written.

02

Build the APIs

RESTful APIs developed to a clean, consistent standard, with clear documentation for integration.

03

Secure & harden

Authentication, authorization, and data handling built to modern security practices from the ground up.

04

Test & monitor

APIs tested under realistic load, then deployed with monitoring and alerting in place for ongoing reliability.

Tools we use

Node.js / NestJS · PostgreSQL / MongoDB · Docker & cloud deployment (AWS, etc.) · API testing & monitoring tools

Timeline: a standard backend with core API endpoints and authentication is typically built and tested within 2–4 weeks; more complex systems with heavy data pipelines or multiple integrations take longer, with clear milestones agreed during architecture planning.

Why BetterSell

Backends built for reliability, not just function

Architected for real load. Systems are designed for production traffic from the start, not scaled reactively after problems appear.

Security is not optional. Authentication and data handling follow modern security practices by default.

Documented APIs. Every endpoint is documented clearly, making integration and future development straightforward.

Monitored after launch. Uptime and performance monitoring are set up so issues get caught before users notice.

A solid backend still needs a front-end that does it justice

A reliable backend is the foundation — but a fast, well-built front-end is what actually delivers that reliability to your users in a way they experience directly.

Recent results

What this looks like in practice

Downtime, eliminated

Before: An app’s backend regularly went down during traffic spikes, especially around product launches and promotions.

Diagnosis: The original architecture had no load balancing or caching strategy, meaning every request hit the database directly with no buffer.

Fix: Re-architected the backend with proper caching, load balancing, and database query optimization for concurrent load.

Result: The system handled subsequent high-traffic events without downtime, including a launch with several times the previous peak traffic.

Security gap, closed

Before: A security review found that user passwords were stored with weak hashing, and API endpoints had no rate limiting.

Diagnosis: The original build had prioritized shipping quickly over following modern security practices for authentication and API protection.

Fix: Rebuilt authentication with proper password hashing standards and implemented rate limiting across all public API endpoints.

Result: The security gaps were closed before they could be exploited, and the system passed a follow-up security review cleanly.

API, finally documented

Before: A growing team was struggling to integrate with an internal API that had no documentation, slowing every new feature.

Diagnosis: The API had been built incrementally without documentation, so every integration required asking the original developer directly.

Fix: Documented every endpoint clearly and standardized the API’s response structure for consistency.

Result: New features integrated with the API significantly faster, since developers no longer needed to ask questions about undocumented behavior.

Let’s build a backend that actually holds up

Book a free architecture review and we’ll show you where your current backend is at risk and what a properly built system would look like.

Here are some frequently asked questions

What people mostly ask us about back-end development and what you might wanna know –

Architecture and system design, database modeling, API development, authentication, and security hardening — see the full scope above.

Yes, re-architecting an existing system for better performance and scale is a common version of this project.

Node.js / NestJS, PostgreSQL / MongoDB, and cloud deployment platforms like AWS, chosen based on the project’s specific needs.

Security is built in from the start — authentication, data handling, and API protection follow modern security practices by default.

Yes, every endpoint is documented clearly as part of the standard scope, making integration straightforward.

Yes, third-party service integration is part of the standard scope.

Yes, uptime and performance monitoring are set up so issues get caught before they become outages.

Architecture is designed for production load from the start, and APIs are tested under realistic conditions before launch.

A standard backend with core endpoints and authentication is typically 2–4 weeks; more complex systems take longer.

Yes — book a free architecture review and we’ll show you exactly where the risk is.