Node.js, API and Backend Development Agency

Backend development services in Node.js, NestJS, Bun and Python with FastAPI: typed APIs, data models, integrations and the infrastructure behind SaaS products and web apps. Senior engineers, AI-accelerated delivery, tests on every change and code you own.

What We Serve

Backend and API Development That Your Product Can Grow On

The backend is where products quietly succeed or fail: data models that stay sane as features pile up, APIs that front-ends and partners can rely on, auth and billing that never leak, and infrastructure that scales without surprises. Our backend development agency builds those foundations in Node.js with NestJS or Express, Bun, or Python with FastAPI, on PostgreSQL, Supabase, MongoDB or Redis, deployed to AWS, Cloudflare or Vercel. AI tools scaffold services, write tests, generate migrations and draft API documentation; senior engineers design the architecture, review every pull request and own security. The result is a backend any good team can take over, documented and tested from the first commit.

Our Approach

Model the Domain, Type the Contracts, Automate the Checks

We start with the domain: entities, relationships, permissions and the events that matter. That becomes a data model and an API contract (REST or GraphQL) typed end to end, so front-end and backend never argue about shapes. Services are built in small, reviewed pull requests with unit and integration tests generated alongside the code. Auth, rate limits, input validation, secrets and dependency scanning are set up before features, not after an incident. Observability (logs, metrics, error tracking) ships with the first deploy. Every change passes CI and a senior engineer before it merges.

What Is Backend Development?

Backend development builds the server side of a product: databases and data models, APIs, authentication, business logic, integrations and the infrastructure that runs them. It is what makes a web or mobile front-end actually work, securely and at scale.

APIs and services

REST and GraphQL endpoints with typed contracts and documentation.

Data and storage

PostgreSQL, Supabase, MongoDB and Redis designed for how the product reads and writes.

Auth, billing and security

Identity, permissions, payments and the controls around them.

Infrastructure and operations

Deployment, scaling, monitoring and backups automated from day one.

At Devoq Design, backend development means typed, tested, documented services delivered about 5x faster, with senior engineers reviewing every change.

Why Professional Backend Development Matters

Front-ends can be redesigned in a sprint. A bad backend follows a product for years. Getting the data model, APIs and security right early is the cheapest decision you will make.

Reliability

Tested services and monitoring mean fewer outages and faster recovery.

Security

Auth, validation, secrets and scanning built in, not bolted on.

Speed Under Load

Data models, caching and infrastructure designed for growth.

Integration Ready

Clean APIs that partners, mobile apps and AI features can use.

Lower Cost of Change

Typed, documented code is cheaper to extend a year later.

No Lock-In

Standard stacks in your own cloud and repositories.

Our Backend Development Expertise

Node.js and NestJS

Structured, typed services for SaaS and APIs.

Python and FastAPI

Data-heavy services, AI integrations and async APIs.

Data Engineering

PostgreSQL design, migrations, caching, queues and search.

Cloud and DevOps

AWS, Cloudflare Workers, Vercel, Docker and CI/CD.

Backend Development Services We Offer

Every product needs a different backend shape. Our backend development services cover new builds, APIs, integrations and modernization.

API Development

REST and GraphQL APIs with typed contracts, docs and versioning.

SaaS Backend Development

Multi-tenant data, auth, billing, roles and audit trails.

Node.js and NestJS Development

Structured services with tests, queues and background jobs.

Python and FastAPI Development

Async APIs and data services, often around AI and analytics.

Third-Party Integrations

CRM, payments, ERP, messaging and partner APIs connected reliably.

Backend Modernization

Legacy services rewritten or refactored with tests written first.

From a first API to a multi-tenant SaaS backend, our development services build foundations products can grow on. See also: AI-accelerated development, AI integration, DevOps and cloud engineering and hire a Node.js developer.

A backend development process based on your product.

Why Choose Us?

Senior Engineers Own the Architecture

Domain, data and security decisions made by people who have run production systems.

AI-Accelerated, Human-Reviewed

Agents scaffold services and tests; engineers review every pull request.

Security From the First Commit

Auth, validation, secrets and scanning set up before features.

Front-End and Backend in One Studio

Typed contracts shared with the React, Next.js and mobile teams.

Documented and Observable

API docs, runbooks and monitoring delivered with the code.

Flexible Engagement

Fixed-scope build, monthly retainer or a dedicated backend engineer.

Common Backend Problems We Fix

Teams usually look for a backend development agency when the server side has become the risk. These are the problems we fix most.

APIs Nobody Documented

Endpoints only the original developer understood.

Data Model That Fights Every Feature

Schemas designed for the first version and never revisited.

Security Gaps

Missing validation, weak auth and secrets in the wrong place.

Slow Under Load

Queries, caching and infrastructure that fall over at scale.

No Tests, No Confidence

Releases that depend on manual checks and luck.

Integration Spaghetti

Third-party connections scattered with no retries or monitoring.

Contact Us

Ready for a backend your product can grow on?

Technology we build backends with

Node.js with NestJS or Express, Bun and Python with FastAPI, PostgreSQL, Supabase, MongoDB and Redis, AWS, Cloudflare and Vercel, and AI tools inside your repository. Everything lives under your own accounts.

Node.js

NestJS

Express

Bun

Python and FastAPI

PostgreSQL

Supabase

MongoDB

Redis

GraphQL

REST APIs

Prisma and Drizzle

AWS

Cloudflare Pages and Workers

Vercel

Netlify

Google Cloud

Azure

Docker

Kubernetes

Terraform

GitHub Actions CI/CD

Anthropic API

OpenAI API

Gemini API

RAG pipelines

pgvector

Pinecone

LangChain and LangGraph

Vercel AI SDK

MCP servers

Evals and guardrails

Playwright

Vitest and Jest

AI-assisted code review

Lighthouse and Core Web Vitals

WCAG 2.2 accessibility

Git and GitHub Actions

Claude

Claude Code

Cursor

OpenAI Codex

ChatGPT

Gemini

GitHub Copilot

v0

Figma AI

Midjourney

What You’ll Receive

Every backend engagement ends with a defined handover. Everything below transfers to you, so any team can carry the system forward.

Domain and Data Model Documentation

API Contracts and Documentation

Source Code in Your Repository

Automated Test Suite

Database Migrations

Auth, Roles and Security Setup

CI/CD Pipelines

Infrastructure as Code

Monitoring, Logging and Runbooks

Recorded Handover Walkthrough

Every deliverable is shaped by your product, your data and your team, and you own all of it.

Our Passion: Your Growth, Our Recognition

At Devoq Design, client success is paramount. We measure our worth by the heights our clients reach. Awards are a delightful affirmation, but seeing your business flourish that’s the true reward.

26 Reviews on Clutch

5.0

Discover Our Case Studies

Explore Compelling Case Studies: Real Solutions, Real Success Stories

Web Design

Firewire

We crafted a sleek and intuitive website for Firewire, a digital marketing company specializing in SEO and Google Ads, to showcase their expertise and results. Our design highlights their data-driven approach to connecting businesses with their audience.

Increase Customer interaction

87 %

New Customer Acquisition

30 %

Marketing

SaaS Product Design

Buzops

We created a clean and scalable SaaS experience for Buzops, helping businesses manage operations, automate workflows, and improve customer engagement through a unified platform.

Demo Request Increase

37 %

Platform Interaction Growth

68 %

Customer Acquisition Boost

25 %

SaaS

Web Design

Cadre Crew

We designed and developed a user-friendly website for Cadre Crew, a company that helps growing businesses scale operations with virtual assistant and project management services. Our goal was to create an intuitive and efficient experience for their users.

Increase Customer Value

25 %

Boost Traffic

20 %

Higher Conversion Rate

15 %

Professional Services

Web Design

Wealth Bridge

We built a modern online platform for Wealth Bridge, a mortgage and loan comparison service. The goal was a credible, easy-to-use experience that makes complex loan information simple. With a focus on clarity, performance and smooth interaction, the site helps borrowers compare home-loan products and choose the right one with confidence.

Higher Lead Generation

50 %

Growth in Page Interaction

78 %

More Returning Visitors

40 %

Fintech

Web Design

Angel Care

We created a compassionate and accessible digital experience for AngelCare, simplifying care discovery, improving NDIS understanding, and empowering users to access personalized support services with ease.

Care Program Adoption

22 %

Client Interaction Increase

48 %

Satisfaction Score

93 %

Healthcare

While growth of our clients is what matters most, it`s nice to get awards

We unite Business-Driven + User-Centered UX process while creating the product design tocover business goals and user`s needs.

Michael Cosgrove

Oct 3, 2023

Devoq Design’s work helped improve user satisfaction, reduce bounce rates, and increase conversion rates and positive feedback. The team consistently met deadlines and adapted well to evolving project requirements. Overall, they were responsive, experienced, and communicative.

Emin Salmanov

Mar 10, 2024

The client was pleased with Devoq Design’s thorough understanding of each design stage. They seamlessly integrated into the internal team, providing helpful critiques and insights. They regularly communicated via phone, email, and Slack. Devoq Design’s collaborative approach stood out.

Johan Timmer

Mar 1, 2024

Devoq Design delivered a visually stunning website, improving the client's online presence and traffic. The team was attentive to detail and communicated effectively through emails and messages. Moreover, their professionalism, innovative work, and personalized approach were also outstanding.

Erin Gouse

May 14, 2019

Devoq Design Studio offered detailed documentation and maintained open lines of communication throughout the project. Their proactive approach set them apart from other vendors.

Anika Schleifer

Mar 21, 2024

Devoq Design has completed the design phase, and the client is very satisfied with the new layout. The service provider is responsive and incorporates the client's feedback. The client has been impressed with Devoq Design's ability to create both strategic and beautiful designs.

Tom Peeters

Mar 12, 2024

The project is still ongoing, but Devoq Design has already delivered functional components of the client's product. The team establishes a collaborative workflow through clear and constant communication - they always provide updates on the project's progress. They're also skilled at what they do.

Frequently Asked Questions

Which backend technologies do you work with?

Node.js with NestJS or Express, Bun, and Python with FastAPI. PostgreSQL, Supabase, MongoDB and Redis for data; Prisma and Drizzle as ORMs; REST and GraphQL for APIs. Hosting on AWS, Cloudflare, Vercel or your own cloud, with Docker and GitHub Actions for delivery.

How much does backend development cost?

It depends on the number of services and endpoints, data complexity, integrations, auth and compliance requirements, and whether you have an existing system. We scope a fixed price for a defined build or a monthly retainer for ongoing work after a short discovery call.

Can you work with our existing backend and team?

Yes. We audit the current system, agree a plan with your engineers, and ship reviewed pull requests inside your repository and sprint rhythm. A trial sprint comes first so you can judge the fit.

How do you keep AI-generated backend code secure?

Architecture, auth and data decisions are made by senior engineers before any code is generated. Every pull request is reviewed by a person and must pass tests, type checks, lint and dependency and secret scanning. We never send your customer data to AI tools without a written agreement.

Do you build the frontend too?

Yes. The same studio designs and builds React, Next.js, Astro and mobile front-ends, so API contracts are shared and nothing gets lost between teams.

How is this about 5x faster than a traditional agency?

Four things add up: several AI-drafted options at once instead of one at a time, generated boilerplate and tests instead of hand-written setup, reusable component libraries instead of page-by-page builds, and automated checks on every change instead of a manual pass at the end. Review time stays the same; waiting time disappears.

Is AI-assisted work good enough, and is it safe?

AI never ships anything on its own. A senior lead reviews every design and every code change, automated tests and accessibility checks run on each one, and the code is plain TypeScript in your own repository. We do not send your customer data to AI tools without a written agreement.

Who owns the code, the design files and the accounts?

You do, from the first week. Figma, GitHub, CMS and hosting accounts are created under your company, and the contract assigns the IP to you. There is nothing to hand back at the end because it was always yours.

How do you charge: fixed price, monthly retainer or dedicated team?

All three, depending on the shape of the work. A fixed price when the scope is clear, a monthly retainer when the work keeps evolving, and a dedicated designer or engineer pair when you want capacity inside your own team. We recommend one after a short discovery call.

Do you work with companies in the US, UK, Canada or Australia?

Yes, most of our clients are there. Devoq Design has teams in India, Canada and the US, so every project has overlapping hours for reviews and stand-ups. Everything else runs async with recorded walkthroughs, decision logs and written updates in your Slack or Teams.

How do we get started?

Book a 30-minute call or send a short brief. We come back within a few working days with a scope, a plan and a price. Work starts after an NDA and IP assignment are signed and your accounts are set up.