Still on Vue 2
Vue 2 reached end of life on December 31, 2023: no official security fixes, libraries dropping support. We map what blocks the move, then migrate in slices.
Vue apps that stay simple after the team doubles
Diffco builds Vue 3 and Nuxt applications: SaaS products, dashboards, customer portals and content sites. We also take over the ones still running on Vue 2. Senior engineers set the architecture, state model and component rules; AI agents build inside them; a person checks every key screen in a real browser before it ships.
Senior engineers. Vue 3 and TypeScript by default. Discovery in days; working screens in weeks.
Products we developed are used by
Awards and client reviews
- Top AI Development Company
- Top 10 Software Developers
- Top AI Developers
in California
- Top Software Development Company
The quality and consistency of the team make Diffco stand out from other vendors.
Art DanielovCEO at FlashgridTheir commitment to excellence ensures our platform remains robust and adaptable to our evolving needs. With their expertise, we've successfully enhanced our offerings, making our collaboration highly effective.
Pete GualfettiHead of Design and Integration at Good2GoWe were impressed by Diffco's approach to the development process and how they engineer new solutions. They look ahead, learn about your product and strategy, and develop sophisticated, highly functional solutions.
Stas TushinskiyCEO & Co-founder at InstreamaticDiffco supplied us with the skilled engineers we needed to meet our ambitious goals. Their account manager proactively addressed concerns, ensuring our expectations were met.
Razvan SpatariuSenior Software Engineering Manager at MultiverseDiffco took on a complex financial system build for us — the kind of work that touches fund accounting and compliance, where there’s no margin for error — and they delivered. They helped us shape our AI product strategy rather than just executing tickets. Real ownership of the outcome.
Adam HooksCEO at Vero K12Diffco handled discovery for two complex health tech AI products for us. They’re technically sharp, honest about what’s actually worth building, and easy to work with. They moved fast without cutting corners and understood the healthcare space. Highly recommend.
Mark MagazuPrincipal at M3 Veterinary Innovation AdvisorsDiffco's expertise and engineering approach increase the reliability and efficiency of our IoT infrastructure. Diffco has proven to be a reliable partner with exceptional expertise. I highly recommend their services.
David C ThompsonSenior Digital Initiatives director at ChemTreatThey were communicative, consultative, and helpful. They went above and beyond all the way. What an amazing team. I will work with them again and again.
Don MarklandCEO at Accountability NowDiffco turned our concept into a polished product from scratch, delivering on a tight timeline. Clear communication, organized project management, and a strong mix of creativity and technical expertise produced an app that exceeded our vision.
Mason MeninCo-founder at WYA Group, Inc.
Where Vue apps get stuck
Vue is easy to start.
It’s the second year that needs an architecture.
Vue’s gentle learning curve is why teams pick it. It’s also why many Vue codebases grow without anyone deciding how state, components and types should work.
Two APIs in one codebase
Options API in old screens, Composition API in new ones, mixins nobody can trace. We agree one way to write components and move the rest over time.
A store that knows everything
One Vuex store holding server data, form drafts and UI flags, so one change breaks three screens. We split it into small Pinia stores and a query layer.
TypeScript in name only
“any” everywhere, untyped props and templates the compiler never checks. Refactors happen by search and hope. We turn on strict types and check templates in CI.
SEO that never arrived
A single-page app serving empty HTML to search engines, with a Nuxt migration on the roadmap for two years. We move the public pages to Nuxt first.
A small ecosystem, used carelessly
Plugins and UI kits that never moved to Vue 3 hold back every upgrade, and nobody owns replacing them. We find maintained ones and swap them in early.
The architecture, decided early
Server data lives in one query layer, shared state in small Pinia stores with clear owners, and everything else stays inside the component. Props, events and templates are type-checked in CI, so a refactor fails the build, not the user.
Vue.js development services
From a first Vue app to a front end several teams share
New Vue 3 products
SaaS apps, portals and dashboards in Vue 3 and TypeScript, with the state model, component rules and design system decided in discovery.
Best for:Teams that want a framework new hires pick up fast.
Nuxt sites and apps
Server-rendered and static Nuxt builds for SEO-critical products, content hubs and marketing sites that share components with the app.
Best for:Products whose traffic starts in search.
Vue 2 to Vue 3 migrations
Dependencies audited, blockers replaced, Vuex moved to Pinia, Options API kept or converted where it pays, screen by screen with the product live.
Best for:Teams still running an end-of-life framework.
Design systems in Vue
Accessible Vue components, design tokens and Storybook documentation matched to your Figma file.
Best for:Companies running several products or teams on one UI.
Interfaces for AI features
Chat and copilot surfaces, streaming responses and review queues in Vue, built to show uncertainty honestly.
Best for:Products adding AI that users have to trust.
Choosing the framework
React, Vue or Angular: which one fits?
AngularReactVue
Best whenLarge teams want strict conventionsThe widest ecosystem and hiring pool matter
A small team wants simplicity
A small team wants simplicityStructureOpinionated, batteries includedA library; architecture is decided per projectOfficial router and store
Official router and storeLearning curveSteeperModerateThe gentlest of the three
The gentlest of the threeServer rendering and SEOAngular SSRNext.js or React Router framework modeNuxt
EcosystemEnterprise-focused✓ The largestSmaller
Typical riskHeavier for small appsToo many choices without an architectureFewer enterprise component kits
We build in all three, and we’ll recommend against Vue when your team or constraints favor another framework.
How we build
Senior engineers decide the architecture. AI agents build the screens. A person checks every one before release.
Our own AI delivery platform puts your plan, your design system and your Vue rules in front of every agent before it starts: Composition or Options API, which store owns which data, which component to reuse. It checks everything it produces on every change.
Senior engineers decide what to build and how; more than 100 AI agents per engineer build inside those rules around the clock. Before release, a person watches each key user task work in a real browser and signs off against a standard agreed before the code existed. Ask for the same fix twice, and it becomes a rule every agent follows from then on.
The loop, on a Vue product
- You say what the screen must do, and on which devices
- We show the components, stores and routes it touches
- You approve a clickable version before it’s built for real
- Agents build inside the plan, with a check on every change
- A person watches it work in a real browser and signs off
- 100+AI agents per engineer, directed by senior engineers
- Every changechecked against the plan, the types and the design system
- One plancomponents, state and data agreed before the build
- WCAG 2.1 AAthe target for every screen, with automated checks on every change
What you get
A Vue codebase that reads the same in every file
One way to write Vue
Composition API and <script setup> by default, with the conventions written down and enforced by automatic checks, so every screen reads like the last.
State with clear owners
Server data in one query layer, shared state in small Pinia stores, local state in components. Every bug has one place to live.
Types that reach the template
TypeScript across components, props and events, checked in CI, so renaming a field fails a build instead of a customer.
Code and decisions you own
Tests beside the code, and the plan, rules and decision log as plain files in your repo, yours to keep with any team.
Why Diffco for your Vue front end
Front-end engineers who ship in your stack, on your terms
We’ve built a marketplace front end
For Vitality Access, we built the customer marketplace and staff admin on Next.js 15 and React 19 in seven weeks of development.
We’ve joined a product mid-flight
As Gitcha’s embedded team, we refactored key parts of its legacy React and Node codebase, modernized its AWS infrastructure and helped ship Version 2 on time.
Design and engineering in one team
Senior product designers in-house, so the Figma file and the component library are the same decisions, made once.
We build the back end too
The same firm builds the Node.js or PHP (Symfony) API behind your Vue front end, designed for the screens that call it.
We tell you when Vue is the wrong tool
If your hiring plan or a component kit you need points to React or Angular, we say so before you spend.
Senior team, in your time zone
The engineer who designs your component architecture is the engineer who ships it, in Pacific time, with an office you can visit.
AI product engineering · SaaS
Maze’s AI Moderator, live in production, with its interview interface rebuilt in WebGL
Maze wanted user research without a researcher in the room. Diffco delivered the AI Moderator inside Maze’s own product and stack, including the live participant interface: rebuilt in WebGL so its listening, thinking and responding states stay smooth while a conversation runs.
- 20 languageslive in production, running interviews in 20 languages
- 35 customersin the beta, ahead of general availability
- By pull requestdelivered inside Maze’s own monorepo and review process
Two ways to start
Audit what you have, or hand us the build.
Vue front-end audit
One to two weeks. A senior front-end architect, with agents reading the whole codebase, maps state and data flow, checks dependencies for Vue 3 readiness, profiles the slowest screens, audits accessibility and bundle size, and delivers ranked fixes with an estimate given as a range.
Fixed price, agreed up front- Includes a Vue 2 → 3 migration map if you need one
- The report is yours. Use it with any team, including your own
Build with Diffco
Discovery in a few days to two weeks; a clickable walkthrough within the first weeks; working screens soon after. Senior engineers decide, agents build inside the plan, a person signs off in a real browser. Monthly team allocation or a fixed scope after discovery.
- Estimate given as a range with its open questions
- The plan and the design system are yours from week one
- Handover with runbooks and a codebase you can read
What we bring
Our Vue stack, from the interface to the data
Vue core
Vue 3
TypeScript
Vite
Nuxt
State and data
Pinia
TanStack Query
VueUse
GraphQL
Apollo
UI and design systems
Tailwind CSS
Vuetify
PrimeVue
Quasar
Storybook
Figma
Quality and performance
Vitest
Playwright
axe
Lighthouse CI
Sentry
AI in the interface
OpenAI
Anthropic
Vercel AI SDK
Streaming UI
Our case studies
Core engineering team behind Gitcha's product
Medical-tourism marketplace and admin panel, built in 7 weeks
Full-stack engineering and AI product discovery for Happier, a top 3 meditation app in the world
One performance KPI system for field agents, built from multiple data sources and AI analytics
Core platform support and development for a keyless-access startup
Explore our
amazing case studies
Let’s build something
great together.
Frequently Asked Questions
Because the architecture is decided before anything is built. Senior engineers set the state model, component rules and type checks; AI agents build inside that plan; a person checks each key screen in a real browser before release. Vue stays simple because someone decided how it should be used.
Vue 2 reached end of life on December 31, 2023. We audit dependencies first (which plugins block the move, what the tests cover), then migrate screen by screen, often using the Composition API in new code while older screens move later. The product stays live throughout.
Plain Vue with Vite for products behind a login. Nuxt when public pages need server rendering and search traffic, or when one product mixes content and app. We decide in discovery and write the reason down.
Usually yes. Pinia is Vue’s official store, with simpler code and better TypeScript support. We move module by module, and often find that much of the old store was server data that belongs in a query layer instead.
Yes. We start with a short audit (state, dependencies, component structure, test coverage), then fix, refactor or rebuild screen by screen while the product stays live.
Each key screen gets a load-time and bundle budget checked in CI. We build to WCAG 2.1 AA, run automated checks on every change, and do manual keyboard and screen-reader passes before release.
Either. We have senior product designers in-house, or we work with your design team and turn its Figma file into a Vue component library both sides trust.
A front-end audit takes one to two weeks. A new product or a Vue 2 migration is estimated in discovery, as a range with the open questions that make it wide; larger platforms ship in usable releases.
Yes. A monthly allocation of senior front-end engineers who work in Vue, in your repo, sprints and review process, directed by your leads, with our platform and an architect behind them.
You do: the code, the component library, and the plan, rules and decision log, kept as plain files in your repo from the first commit and yours to take to any team.
Engagements start with a fixed-price audit or discovery, agreed up front. Builds run on a monthly team allocation or a fixed scope after discovery, with the estimate given as a range and the open questions that make it wide.
Need other services?
React DevelopmentSenior React engineers build fast, accessible front ends: new products, takeovers and React 19 upgrades.
Node.js DevelopmentSenior engineers build Node.js APIs and real-time services in TypeScript, and take over the ones that have grown hard to change.
Vibe Code RescueYour Lovable, Bolt, Replit or Cursor prototype worked. Our senior engineers stabilize, harden or rebuild it for production.
Web DevelopmentModern websites and web apps engineered by senior teams directing AI agents.
AI & ML DevelopmentML, RAG, computer vision, and copilots, engineered to production standards with Production-Ready AI Engineering.
Custom Software DevelopmentWeb apps, platforms, and internal tools, built in weeks instead of months, from PoC to production.
