Source: https://daphnislabs.com/services/full-stack-development # Full-stack development services Deliver complete features across the interface, API and database—including what happens when a request fails. [Discuss My Full-Stack Build](https://daphnislabs.com/contact?service=full-stack-development) [Try the example](https://daphnislabs.com/services/full-stack-development#worked-example) Interface **Display name** Asha API `PATCH /profile { displayName: "Asha" }` Stored record **user\_42** Name updated ## Tools & technologies - React - Next.js - TypeScript - Node.js - Python - PostgreSQL - Docker ## The reply was lost. Was the stock reserved? Interrupt a response and retry the same operation. Watch the record, not just the button. Interactive example Reserve the final unit ### Desk lamp Product LAMP-01 QuantityInterrupt the response Reserve stock Ready ### Request & response `POST /reservations request-key: demo-104` 1. Requested: 1 unit 2. Waiting for submission ### Stored result **Units available** 1 **Reservations** 0 One unit is available. The example can lose the response after the write. Fictional example. Nothing is sent or saved outside this page. ## Resolve the seams before they become bugs. UI ↔ API ### A shared contract Request shape, errors and loading states agreed across the teams using them. API ↔ Data ### A safe change Validation, concurrent updates and migrations considered with existing records. App ↔ Services ### A defined failure Timeouts, retries and background work designed around each external dependency. ## Join the team at the missing boundary. A complete feature can span several owners. ### Your existing team Confirm repository access, domain rules and the people responsible for acceptance. ### Our delivery scope Name the interface, service and data changes we own, plus the tests that demonstrate the feature. ### Operating handoff Agree release access, diagnostics and who responds after launch. [Need ongoing delivery infrastructure?](https://daphnislabs.com/services/devops-services) ## More than the interface commit. - ### Frontend feature implementation - ### Versioned API contracts - ### Schema & migration scripts - ### Integration and failure tests - ### Deployment configuration - ### Tracing & handover notes ## Selected work [View all case studies](https://daphnislabs.com/case-studies) ![Sinzo demo - the storefront introduction](https://daphnislabs.com/images/projects/sinzo/demo-home-mobile.webp) ### [Sinzo](https://daphnislabs.com/case-studies/sinzo) Supplier-data scraping and AI engineering for a cross-border shopping and warehouse platform. View project ![Zootmart — public product introduction](https://daphnislabs.com/images/projects/zootmart/home-desktop.jpg) ### [Zootmart](https://daphnislabs.com/case-studies/zootmart) Web, hybrid apps and administration work for a marketplace with a rewards layer. View project ![Fashom — current public website campaign](https://daphnislabs.com/images/projects/fashom/home-campaign-desktop.webp) ### [Fashom](https://daphnislabs.com/case-studies/fashom) Product development and advertising support for Fashom’s digital service. View project ![Hubhopper — current public product website](https://daphnislabs.com/images/projects/hubhopper/home-desktop.webp) ### [Hubhopper](https://daphnislabs.com/case-studies/hubhopper) Initial app and backend development, followed by training for the client’s team. View project 01 / 04 ## A few practical questions. ### Can you work with our frontend or backend team? Yes. We agree ownership of contracts, repositories, environments and release decisions so the feature can be delivered across teams without ambiguous boundaries. ### Will you replace our stack? Not by default. We review the existing code, dependencies and operational constraints first. Changes should solve a concrete delivery or maintenance problem. ### Are infrastructure operations included? Application deployment setup can be included. Ongoing infrastructure management, incident response and on-call coverage need an explicit operating agreement. ### Can you migrate existing data? Yes, when scoped. We define mapping, validation, backups, rollback and the cutover approach against the existing data and acceptable interruption. ## Bring one feature across the boundary. Share the user action, existing code and the systems that must agree on the result. [Discuss My Full-Stack Build](https://daphnislabs.com/contact?service=full-stack-development) [Vue.js Development](https://daphnislabs.com/services/vue-development) [React & Next.js Development](https://daphnislabs.com/services/react-development) [Angular Development](https://daphnislabs.com/services/angular-development) [AngularJS Development & Support](https://daphnislabs.com/services/angularjs-development) [Python Development](https://daphnislabs.com/services/python-development) [Laravel & PHP Development](https://daphnislabs.com/services/laravel-development) [Node.js Development](https://daphnislabs.com/services/nodejs-development) [MEAN Stack Development](https://daphnislabs.com/services/mean-stack-development)