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API & Backend Development Services

The backend is the engine behind every great application. We design and build REST APIs, backend services, and database architectures that are secure, performant, and built to scale.

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Why choose CodeNest for your API & backend development project

A poorly designed backend creates technical debt, security vulnerabilities, and performance problems. We build backend systems that are structured, documented, and ready to grow.

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Backend code on a screen

  • One team, end to end

    Design, engineering and QA work as one team in Mohali, so nothing gets lost between hand-offs. You talk directly to the people building your product.

  • Clear scope and budget

    Before any code is written we agree on the scope, deliverables and budget, and we tell you about any risk to the timeline as soon as we see it.

  • Working software every week

    You see a demo every week, not a big reveal at the end, so your feedback shapes the product while it is still cheap to change.

  • We stay after launch

    Launch is where most of our partnerships begin. We stay on for fixes, updates and new features, and keep the code documented so it is easy to hand over.

Our capabilities

The reliable engine behind every great application. Robust, scalable backend systems and APIs that power your applications reliably.

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  • 01

    API Design

    Defining resources, endpoints, authentication, and data contracts.

  • 02

    Database Design

    Schema design, relationships, and indexing strategy.

  • 03

    Development

    Building controllers, services, and data access layers.

  • 04

    Security Review

    Authentication, authorization, injection prevention, and data protection.

  • 05

    Testing

    Unit tests, integration tests, and load testing.

  • 06

    Documentation

    OpenAPI specs, Postman collections, and integration guides.

What we build

The reliable engine behind every great application.

Network cables plugged into a switch
  • 01

    Product API

    Backend API powering web and mobile application frontends.

  • 02

    Integration Layer

    Middleware connecting your systems with third-party services and data sources.

  • 03

    Data Processing API

    High-volume backend processing pipelines for analytics and reporting.

  • 04

    Backend for SaaS

    Multi-tenant backend with billing integration, rate limits, and subscription management.

The problems we solve

A poorly designed backend creates technical debt, security vulnerabilities, and performance problems. We build backend systems that are structured, documented, and ready to grow.

Where things get stuck

  • APIs that break under load or fail to handle errors gracefully
  • No documentation making integrations impossible
  • Security vulnerabilities from poor authentication design
  • Database performance degrading as data grows
  • Tightly coupled services that are hard to extend

What changes with CodeNest

  • Reliable APIs enabling faster frontend development
  • Security-first design reducing vulnerability risk
  • Scalable architecture supporting business growth
  • Clear documentation enabling team and partner integrations
  • Performance optimization reducing infrastructure costs

Tools we use for API & Backend Development

The stack we reach for most often. We pick the final tools for each project.

  • Node.js
  • Python
  • FastAPI
  • Express.js
  • PostgreSQL
  • MongoDB
  • Redis
  • Docker
  • AWS

Case study

Curious if we’re the right fit? Here is one of the products we designed and built.

See all work

Zyvo

CRM & HR software

Zyvo brings CRM, HR, recruitment and operations into a single workspace built to run a company end to end. Because every module shares the same records, sales and people teams stop reconciling spreadsheets, and dashboards update the moment someone changes a record.

We built a multi-tenant workspace where CRM, HR and operations modules share one data model, with role-based permissions down to which records each role can see. Lists and dashboards update in real time, it installs as a progressive web app, and it connects to Callsy so calls start straight from a lead.

Find out more
Zyvo website
CodeNestRetail Company
“We were managing most things in spreadsheets, and it was getting messy as the team grew. They helped us bring everything into one place.”
Amit SharmaOperations Manager, Retail Company

Frequently asked questions

Yes. Every API we build is documented using OpenAPI (Swagger) specifications and includes a Postman collection for testing.

Have a project in mind? Let’s build it together.

Tell us about your goals and requirements, and we’ll suggest the right technology and approach for your business.

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