Front-end development services from architecture to release
We build and modernize product interfaces for engineering teams, owning rendering, browser state and shared components. We agree performance and accessibility targets with your team and check them during delivery.
01Capabilities
Front-end engineering with clear delivery responsibility
Front-end development covers the architecture and implementation of the product interface. We agree responsibility for these four areas with your designers and backend engineers.
- Architecture
Rendering and state architecture
We define rendering, the boundary between server data and browser state, module boundaries and build setup. The architecture records include a dependency policy and its owner.
- Performance
Performance budgets checked during delivery
We measure the routes people use on the devices they own, then set a performance budget and check it on every change.
- Accessibility
Accessibility built into component design
We settle keyboard interaction, focus management and semantics while designing components. A formal conformance target shapes that design and testing. Our UI and UX design team works alongside your engineers.
- System
A component library with real consumers
We turn the design language into a versioned library with a breaking-change policy and one source of truth for tokens. Our design systems work defines the library and its consumers. The work runs under unicrew's ISO 27001:2022 certified information-security management system. For warehouse applications, we built shared Angular components with Storybook to the client's design, then integrated the front ends with the backend via REST.
02Fit
Match the implementation to your interface
We match rendering and browser interaction to your users and existing interface. Compare tools in the front-end technologies index; our SaaS for Digital Researches study describes a research workspace paired with a browser extension.
| Your situation | What we recommend |
|---|---|
| An application behind a login, heavy state in the browser, several teams on one component surface | Use ReactUse React for a shared component interface with substantial browser state. We agree state ownership and module boundaries with your maintainers. |
| A large estate of applications, several teams over several years, one upgrade path wanted | Use AngularUse Angular when routing, forms, HTTP access and dependency injection benefit from shared conventions. We set component ownership and an upgrade policy across the teams. |
| A server-rendered application you are not going to replace, and one screen has to get better | Use VueAdd Vue to existing pages where it fits the code and team. React can also be adopted incrementally; either choice needs an agreed boundary between old and new. |
| Mostly content, where search visibility and first paint decide the outcome | Choose renderingChoose static, server or client rendering per surface, with the initial content and interaction in scope. Next.js is one option for combining server and client responsibilities. |
| An internal screen a handful of people use, on an application you already render on the server | Plain HTML and JavaScriptKeep server-rendered HTML and add the interaction the screen needs. We scope the build setup, dependencies and maintenance to that interface. |
| One marketing page that changes twice a year and has no product behind it | Use a templateUse a site builder or template when it covers the page's content and forms. Scope the design and implementation around the page's commercial purpose. |
Scope
We own the rendering recommendation, the boundary between server data and browser state, and the shared component contract. Performance and accessibility targets are written into that contract. Your engineers receive the decisions they need to change the interface. unicrew was founded in 2012 and has 100+ senior in-house engineers across six countries.
A fast front end starts with deciding what each page has to do before it can be useful. That part loads first, and everything else comes after it. We then set a performance budget and check it on every change.
Andrii BurdaSenior Engineering Manager, unicrew03Delivery
Front-end architecture and performance, tested through delivery
We define rendering and data responsibilities before expanding the interface, then validate the decisions on a real route.
- Choose the rendering for each routeWe choose server rendering, static generation, client rendering or a deliberate mix per route, with initial content, hosting and interaction requirements in view.
- Draw the state boundary and write it downWe record where server data ends and browser state begins, whether data fetching is colocated or centralized, and what the screen shows when a request fails.
- Configure the delivery checksWe configure performance and accessibility thresholds in the pipeline, with checks on each change. The scoped QA and test automation work covers how those checks run and how findings are resolved.
- Ship one integrated surfaceWe put one route into production with real data, authentication and error states before broad feature work. You can assess the integrated result before implementation expands.
React
Angular
Vue.js
Next.js
TypeScript
Storybook05Questions
Questions about front-end delivery and ownership
Agree the responsibilities, validation and commercial terms before delivery starts.
Yes. Our front-end development services include responsibility for the architecture and code, with rendering, state and component boundaries agreed in scope.
We define the design-review arrangements, including independent review where required, and the QA practice for the work. Ownership of the whole browser/server system is web development.
We choose the framework from the application, existing code and who will maintain it.
We assess React, Angular and Vue against the same requirements, including the rendering approach and integration with existing code. The recommendation can retain plain HTML and JavaScript when they cover the interface.
We do both, with design and engineering scoped together or separately.
UI and UX design covers interface design, while design systems covers component libraries and tokens. With your existing designers, we work to their system and resolve ambiguous component contracts together. When we provide design and build, the library and its design rules are maintained together.
We start with measurements on the routes your users visit and the devices they use.
Then we diagnose the relevant paths:
- JavaScript bundles and dependencies.
- Rendering and repeated updates.
- API calls and data flow.
- Images and fonts.
The findings define the improvement scope and the performance budget checked during delivery.
A scoping call with an engineer. If the interface already exists, we ask for repository access and performance data.
You receive a written scope covering rendering, the framework recommendation, what remains in place and the ownership of the work. Most engagements start within two to four weeks.
Front-end work is quoted against the scope and delivery model.
- Time and materials: billed hourly, quoted per project.
- Fixed price: outcome based, quoted per project.
- Team extension: billed monthly per team member.
Plan the front-end engineering for your product
Tell us what the interface needs to do, who uses it and what already exists. An engineer will outline the rendering approach, delivery scope and responsibilities for performance, accessibility and shared components.