Product Engineering
Backends that keep transactions correct as you grow.
Services, APIs and integrations designed for transactions, multi-tenancy and growth — including payment gateways, third-party platforms and the internal systems your product depends on.
- ISO 9001 certified
- NDA on request
- You own the code
Trusted by 100+ clients in 25 countries
What we offer
Our backend & API development services.
Take the complete service, or just the parts you need. Every engagement is shaped around your goals, your users and your budget.
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API design
REST APIs with clear contracts, versioning and documentation.
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Payments and ledgers
Gateway integrations and transaction design that reconciles.
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Integrations
ERP, CRM, messaging, maps and identity providers.
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Multi-tenancy
Tenant isolation, RBAC and configuration for platforms that serve many businesses.
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Microservices and events
Service boundaries and event-driven design where they pay off.
Why clients trust us
Real products, real businesses, since 2018.
From startups launching their first app to ministries and global brands, businesses in 25 countries rely on Appsums to build, run and grow their software.
- 15+
- years in IT
- 8+
- years as Appsums
- 100+
- clients
- 25
- countries
How we work
How we deliver backend & API development.
Six clear stages from first call to a product that keeps improving. You always know what is happening, what comes next and what it costs.
- Weekly demosSee real progress, not status reports
- One accountable leadA single person who owns delivery
- Written milestonesScope and budget agreed up front
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Stage 1 of 6
Discover
- Understand goals, users and market
- Prioritise features for launch
- Agree budget and timeline
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Stage 2 of 6
Design
- User journeys and wireframes
- Visual design and prototype
- Test with real users
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Stage 3 of 6
Build
- Agile sprints with weekly demos
- Code reviews on every change
- Integrations and admin tools
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Stage 4 of 6
Test
- Manual and automated testing
- Real-device and browser checks
- Performance and security checks
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Stage 5 of 6
Launch
- App store and cloud release
- Monitoring and crash reporting
- Launch-day support
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Stage 6 of 6
Support and grow
- Bug fixes and OS updates
- New features release by release
- Usage insights and advice
Our work
Products we have built and launched.
A few of the platforms where backend & API development was part of what we delivered. All work
GoEjarReal estate & PropTech · Saudi Arabia
GoEjar: rental marketplace in Saudi Arabia
Web and mobile rental marketplace for appliances and vehicles, with owner, renter and admin roles and local payment gateways.
Booking & ReservationsE-Commerce Solution
View project
Client voice
What our clients say.
In their own words, from the founders and leaders we build for. All reviews
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The developers at Appsums did 8 apps for our company so far all published by GooglePlay and the App Store. They are committed, diligent, cost-effective and deliver results quickly. They fix bugs with relentless efficiency and I would highly recommend them if you need an app or website to be custom built.
Dr Richard McMahonCEO / Founder, SwiftDoc Pty Ltd
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Azad & his co-worker, I found them most technical and prompt in giving solutions to my requirements. They have all guts to go beyond what you think and bring to them. I would definitely recommend this team to go with it.
Ryan KuriakoseCEO / Founder, Orphidia
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The team delivered beyond my expectation as in the early stages I was little hesitant in choosing this small team for Video Streaming project, but team at appsums proved me wrong by all means. I would simply recommend Appsums to any.
Zaid SameerCEO / Founder, Zee Media
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We required a complex set of apps to be published in the App Store and Google PlayStore for clients to use worldwide. The apps must talk to a central database and rely on numerous APIs and custom coding which all works seamlessly. The team are very experienced with years of post Graduate experience in computer science and programming. The simple fact is that they deliver and we would not hesitate to use them again for any app coding, web design, SEO, API development, app publishing, debugging, website design and cloud computing, cloud servers, SSL functions, database management and on-going IT support. It is a rare thing indeed to find a company that is as dedicated to your success as the team at Appsums.
Hannah ElmanCFO, SwiftLaw Pty Ltd
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My experience with AppSums has been from the beginning extremely trustful and transparent, which I think is the key factor when you are outsourcing the development of a product overseas.
Alberto MartinManaging Director, Quiero Inc
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I contacted the Appsums team a couple of months ago through LinkedIn. I asked them to create and take care of my professional website in UAE. Mr. Azad immediately proved to be competent and available. I definitely recommend Appsums and Mr. Azad to my Colleagues and friends!
Dr Sergio VelantiMD | CEODubai, UAE
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Working with Appsums technology has been a wonderful experience. They went above and beyond to transform a concept into a reality. We asked them for the world, and they gave us a whole universe.
Sophie SoliminiCEO / FounderToronto, Canada
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Working with Appsums has been one great experience. They are great in understanding the requirements but what is more important team is very flexible in implementing feedback and doing iteration loops.!
Ivan AndabakCEO / Co-FounderZagreb, Croatia
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We have provided Appsums a very tight timeline to build an App for our Company and their team exceeded our expectations. They completed my dream Project Couture Singapore in very less time.
Kia LimCEO / Founder, Couture Singapore
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We’ve been working with them for over 2 years now and we couldn’t be happier with the extreme value they’ve brought to us. Azad and Hashim were by our side throughout all the steps of our Patients Education Mobile App development from beginning discovery phase to screens designs to implementing processes and features, making sure everything was how we intended it every step of the way. They are true Business PARTNERS.
Danish KhanZonal Account Manager, Novo Nordisk
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I have been connected with the team for a few years and my experience has been really good. I have worked on several projects with the team and every time Azad and his team exceed my expectations. They work great because they share everything transparently and there are never any surprises for me. I continue to work with them on several other projects.
Ankur BhardwajCEO / Founder, Flexus Solutions, LLC
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I had a product was developed in bad way and I almost lost it but then AppSums team took it over and fixed everything and we are almost finished, my product will see the lights soon inshallah because of them
Areej AlyousefBusiness Demand Manager, Mobily & stcPay
Technologies
The technology we build with.
Popular, proven tools that are easy to grow and easy to hire for, so your product is never locked in to us.
Most used for backend & API development:Node.jsNestJSExpressJavaSpring Boot.NETLaravelPostgreSQLMongoDB
Web and mobile
- React
- Next.js
- Angular
- Vue.js
- TypeScript
- JavaScript
- Tailwind CSS
- Flutter
- Dart
- Swift
- Kotlin
- Jetpack Compose
- Android
- iOS
- Ionic
- Figma
Backend and data
- Node.js
- Express
- NestJS
- Python
- Django
- FastAPI
- PHP
- Laravel
- .NET
- Spring
- GraphQL
- Socket.IO
- MongoDB
- PostgreSQL
- MySQL
- MariaDB
- Redis
- Elasticsearch
- Firebase
- Supabase
- Prisma
Cloud and DevOps
- AWS
- Google Cloud
- DigitalOcean
- Docker
- Kubernetes
- Terraform
- GitHub Actions
- Jenkins
- Nginx
- Grafana
- RabbitMQ
- Kafka
- Jest
- Cypress
- Selenium
- Postman
- Jira
AI and integrations
- OpenAI
- Anthropic
- Gemini
- Llama (Meta)
- LangChain
- Hugging Face
- PyTorch
- TensorFlow
- Ollama
- NumPy
- Pandas
- scikit-learn
- Stripe
- PayPal
- Twilio
- WhatsApp Business
- Google Maps
- Shopify
- WordPress
Security and trust
Security, privacy and IP built into how we work.
Security by design
- Secure architecture and code reviews
- Encryption in transit and at rest
- Vulnerability checks before release
- Dependencies kept up to date
Data protection
- Least-privilege, role-based access
- Separate test and live environments
- Hosting in the region you choose
- Credentials handed back at the end
Contracts and IP
- NDA signed before detailed talks
- You own all code, designs and data
- Clear scope and statements of work
- Confidentiality for every team member
Quality and governance
- ISO 9001 certified quality management
- Documented, audited processes
- Progress and risk reports every sprint
- Release checklists and sign-off
ISO 9001 certified. Quality you can rely on.
Our quality management system is independently certified, so every project follows documented, audited processes from kick-off to support.
Explore more
Explore our full range of services.
Most clients start with one service and add others as they grow. The same team keeps the context.
FAQs
Frequently asked questions.
Anything else about backend & API development? Ask us directly. A real engineer reads every message.
Which payment gateways have you integrated?
Including Stripe, Hyperpay, MADA, SADAD, Apple Pay and Google Pay, plus local providers per market.
Can you integrate with our ERP?
Yes, through its APIs or an integration layer we build and document.