Skip to content
Parwaz DigitalMarketing · Web · Courses

Web Development

Backend & API Development

The part of your product nobody sees and everybody depends on — APIs, data and integrations built to be secure, documented and reliably uneventful.

A Parwaz Digital engineer reviewing API documentation and server logs on a laptopAvailable for new projects
  • REST & GraphQL APIs
  • Payment Integrations
  • WhatsApp Business API
  • Security & Documentation

The approach

Backend problems rarely announce themselves until they are expensive: an order recorded twice, a payment confirmed but never fulfilled, a mobile app broken because an endpoint changed without warning. This service is for businesses that need the server side built or rebuilt, whether to power a mobile app, connect a website to internal systems, or replace scripts that have quietly become critical. We design APIs as long-term contracts, with versioning, validation and consistent error handling from the start.

Much of the work is integration. Payment gateways such as JazzCash, Easypaisa and card processors need careful handling of callbacks, retries and reconciliation so money and orders always agree. The WhatsApp Business API needs approved templates, opt-in handling and webhooks for replies. CRMs, accounting tools and courier services each have their own limits and quirks. We move slow or unreliable work into background jobs and queues, so a third-party outage delays a task rather than failing a customer's request.

Security is part of the build, not a final check. Authentication and authorisation are enforced on every endpoint, secrets stay out of code, inputs are validated, and sensitive data is encrypted and logged with care. We use the OWASP API Security Top 10 as a baseline. Every API ships with OpenAPI or GraphQL schema documentation, so your frontend developers, mobile team or a future supplier can work with it without reverse engineering. Structured logs and monitoring mean any issue can be traced to a specific request.

What we work in

  • Node.js
  • NestJS
  • TypeScript
  • PostgreSQL
  • Redis
  • BullMQ
  • GraphQL
  • Postman
  • Docker

Investment

Quoted per project after a free technical consultation. The figure reflects what you actually need, not a package.

Request a quote

What you get

Inside a Backend & APIs engagement

Six workstreams, all included. Nothing here is an upsell discovered halfway through the project.

API design & build

REST or GraphQL endpoints with versioning, input validation and predictable errors, designed around how your apps will consume them.

Database design

Schemas, indexes, migrations and backups for PostgreSQL or MongoDB, planned for the queries your product actually runs.

Authentication & authorisation

Token-based sign-in, role checks on every endpoint, and secure handling of passwords, sessions and API keys.

Third-party integrations

Payment gateways, WhatsApp Business API, CRMs, courier and accounting systems, with webhooks verified and failures retried.

Background jobs & queues

Emails, notifications, imports and reconciliation moved off the request path into retryable, observable jobs.

Documentation & monitoring

OpenAPI or GraphQL docs, a Postman collection, structured logs and alerts, handed over alongside the code.

100%

Endpoints documented at handover

OWASP

API Security Top 10 as baseline

0

Secrets stored in source code

How it runs

Four Stages, No Surprises

01

Discover

We start with a free consultation to understand your goals, audience, and what success actually looks like for you.

02

Design & Build

Strategy turns into work — designs, builds, and campaigns produced in short cycles you review as we go.

03

Launch

We ship it properly: tested, optimized, measured, and set up so results are visible from day one.

04

Grow

Then we iterate. Performance data guides the next round of improvements, month after month.

Proof

Backend & APIs work we have shipped

Real engagements, with the numbers attached.

All case studies
TechCorp enterprise portal projectWeb Development

TechCorp Enterprise Portal

A single portal replacing four disconnected internal tools, with role-based access, live analytics, and integrations into systems TechCorp already ran.

  • 4→1 Internal tools consolidated
  • 8h Reporting time saved weekly
Read the case study
Healthcare platform projectWeb Development

Healthcare Platform

A patient-facing platform handling scheduling, records, and video consultations under healthcare privacy requirements.

  • 70% Bookings now self-service
  • AA WCAG conformance achieved
Read the case study
E-commerce SEO projectSEO Services

E-commerce SEO Success

A technical rebuild of an e-commerce catalogue's search foundation, followed by content targeting the queries that actually convert.

  • 400% Organic traffic increase
  • 2x Organic conversion rate
Read the case study

Good to know

Backend & APIs questions, answered

What clients ask before committing to this service.

Ask us something else

Yes. We integrate the gateway your business holds a merchant account with, including callback verification, retry handling and a reconciliation report so payments and orders can be matched. The merchant account itself is opened in your name, and we help with the technical parts of the provider's onboarding.

Backend & APIs · Free consultation

Ready to TalkBackend & API Development?

Tell us what you are trying to achieve. You will get an honest read on whether backend & apis is the right investment, and what it would take.

Available for new projects — Replies within one business day