Software and apps · delivered in 5 days · Quick service
This service delivers backend development for web applications, built with Express.js and MongoDB by our development team.
Standard package: delivery in 5 days, priced at $25.99.
You will need to supply the domain the order relates to and a short brief describing your requirements.
Whether you are launching a new application, extending an existing one, or resolving backend problems, our team builds secure, scalable and maintainable backend systems tailored to your specification. We write clean, well-structured code using Express.js, MongoDB and JavaScript (ES6+), supported by Postman, Git and GitHub throughout the build.
Each engagement covers custom REST API creation, CRUD operations, database integration with MongoDB, authentication and authorization through JWT, thorough API testing in Postman, robust error handling and input validation, along with bug fixing, performance optimisation and refactoring where needed. We also prepare full API documentation and a setup guide so deployment and ongoing maintenance stay straightforward.
Every build is tested before handover. You get the complete source code, a Postman collection for verifying the API, a sample environment configuration file, and clear installation and usage documentation. Our focus stays on code quality, security, performance and long-term maintainability, so your backend can scale as your application grows.
This service suits businesses that need a straightforward API, an authentication system, database integration, or a full backend build for a web application, backed by clear communication and on-time delivery.
Your order opens its own thread here the moment it is paid, and everything about that order - questions, changes and the final report - happens in it.
A fixed-scope build linking one named source and destination through API or webhook, with retry logic, a basic audit log and a private status page for tracking the single job.
A 1-day review of one API, webhook or support workflow, with a written plan, blockers list and fixed build quote, where the full US$99 fee is credited toward the eventual build.
Automated tests check your key customer journeys, such as booking or paying, on phone and desktop screens, giving you a pass or fail report with screenshots of any failures.
We reverse-engineer executables and libraries that lack source code or documentation, turning the machine code into a structured PDF report covering logic, entry points, hidden behaviour, protections and risk, so you can maintain, audit or trust the file with confidence.
Custom Python or Node.js web scrapers built for real-world sites, handling JS rendering, anti-bot defences and multi-page crawls, with clean CSV, JSON or database output delivered within 2 to 10 days.
A production-grade Web3 wallet frontend connecting MetaMask, WalletConnect v2 and Coinbase Wallet across multiple chains, with a DeFi dashboard, NFT gallery and swap interface, delivered in 5 to 25 days with a 48-hour live preview and 3 rounds of revisions on the Basic tier.
