Website & mobile app development · EonTech Poland

Website and mobile app development, built to last.

EonTech is a Poland-based nearshore website and mobile app development company. Senior engineers design and ship fast, accessible web apps, mobile-web layers, and native or cross-platform mobile clients on a modern stack — under one contract, in your time zone. You keep clean code your own team can extend.

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Why this page exists

One partner for the web app and everything around it.

A modern digital product is rarely just a website. There is a customer-facing web app, a mobile-web layer that has to install to the home screen and behave like an app, a companion iOS or Android client for the fraction of users who live inside apps, plus the APIs, auth, and analytics that make all of it feel like one product. As a website and mobile app development company, EonTech is set up to own that whole surface — not a slice of it.

Our teams are Poland-based, senior only, and covered by the same GDPR-native EU framework EU and UK buyers already accept. Full-cycle capability means the same engineers who ship the web front end can wire the API, harden the pipeline on AWS, GCP, or Azure, and train custom AI/ML models when the roadmap needs one. Nothing that matters gets outsourced sideways.

The rest of this page is a working guide to what we build, how we build it, and what to expect if you are considering EonTech as your web and mobile app development company. Everything below is drawn from actual delivery — no fabricated case studies, no stock statistics.

Key benefits

Six reasons product teams pick a nearshore partner.

What our clients most often name when we ask why they picked EonTech over an offshore vendor, a freelance stack, or a big-consultancy engagement — the commercial case, not the sales pitch.

  • One team for web and mobile

    The same senior engineers own your desktop web app, the mobile-web layer, and any native or React Native client. As a full-stack website and mobile app development company, we avoid the vendor seams that quietly cost you weeks.

  • Nearshore, in your time zone

    Poland-based senior engineers overlap the whole EU and UK working day and cover most of US East Coast. Real conversations with the people writing the code, not overnight handoffs.

  • Ship in slices, not stages

    You click real software every week. Feedback lands in the next slice, not at the end of a six-month waterfall.

  • Accessible + Core Web Vitals by default

    WCAG basics and the Vitals budget are on the build checklist from day one — not a rescue project after launch.

  • Clean, portable code

    TypeScript, tests, and documentation are non-negotiable. When we hand off, your in-house team can extend the app without a rescue engagement.

  • You own everything

    Repo, pipeline, models, and IP are yours from commit one. No proprietary layer, no scale surcharges, no lock-in.

Mobile coverage

Where a web app becomes a mobile app.

The line between "web" and "mobile" is not a wall; it is a slider. As a mobile web app development company we cover the whole range — from installable PWAs to native Swift/Kotlin — and we help you pick the right point on the slider for your users, not the vendor's convenience.

  • Responsive & mobile-web apps

    Progressive web apps and mobile-first responsive front ends that install to the home screen, work offline, and behave like a native shell on iOS and Android.

  • Cross-platform apps

    One React Native or Flutter codebase covers iOS, Android, and often the web. Fewer teams, fewer bugs, one shared design system.

  • Native iOS & Android

    When the product needs native performance — camera pipelines, on-device inference, background tasks — we ship Swift and Kotlin with the same discipline as the web layer.

  • Shared APIs & design tokens

    Web and mobile clients share the same API contract, auth, and design tokens. As a digital web and mobile app development company we treat the whole product as one system, not two projects.

What we build

Front end, back end, one shipped product.

We handle the whole web app, not just a slice. Each part below is led by senior engineers and tied to one plan and one point of contact.

  • 01

    Product web apps

    Dashboards, portals and SaaS front ends. We build the screens your users live in every day.

    • SaaS
    • Dashboards
    • Portals
  • 02

    Modern front-end stack

    React, Next.js and TypeScript by default. The code stays typed, tested and easy to read.

    • React
    • Next.js
    • TypeScript
  • 03 Core

    APIs and back end

    We wire the front end to solid APIs. Auth, data and billing are handled with care.

    • REST
    • GraphQL
    • Auth
  • 04

    Accessible by default

    Every screen meets WCAG basics. Keyboard, screen reader and colour contrast all get tested.

    • WCAG
    • Keyboard
    • Contrast
  • 05

    Speed and Core Web Vitals

    We tune load time, layout shift and input delay. Fast pages keep users and rank better.

    • LCP
    • CLS
    • Caching
  • 06

    Cloud-ready delivery

    Apps ship on AWS, GCP or Azure with CI in place. Each release is staged and observable.

    • CI/CD
    • Observability

  1. Scope and design

    We map flows, screens and edge cases first. You sign off on a clear plan before we code.

  2. Build in slices

    Working features land every week. You click real software, not slide decks.

  3. Test and harden

    Automated tests guard each release. We fix bugs early, so launch day stays calm.

  4. Ship and hand over

    We deploy to production and hand you clean docs. The codebase is yours to own and grow.

Industry relevance

Domains our engineers already speak.

Domain fluency shortens every discovery call. These are the buyer shapes our senior engineers have shipped for repeatedly — from fintech CTOs to non-technical founders launching a first mobile-web MVP.

  • Fintech & payments

    Card, ledger, KYC, and PSD2 flows. Web dashboards and companion mobile apps under the same auth, audit trail, and compliance boundary.

  • E-commerce & retail

    Headless commerce, checkout, PIM, and marketplace integrations at real traffic — plus consumer mobile apps that share the same catalogue.

  • Healthtech & telemedicine

    HIPAA and GDPR-grade portals, patient apps, and clinician consoles with HL7 / FHIR under the hood.

  • Logistics & supply chain

    TMS, WMS, and tracking dashboards with driver mobile apps that still work when the depot has no signal.

  • SaaS scale-ups

    Multi-tenant products, admin surface, billing, and observability, with an installable mobile-web layer for field teams.

  • Startups & MVPs

    First-release web and mobile apps for non-technical founders — scoped to prove the idea, engineered to survive the growth after.

Built for trust

Senior teams, strict standards.

  • Global delivery

    Your time zone and strict, GDPR-aligned controls. You stay in the loop, every day.

  • ISO 27001 practices

    We follow GDPR and ISO 27001 habits across the whole build.

  • Direct engineer access

    No account-manager buffer. You talk to the people writing the code.

Common questions

Answers before you ask.

  • What does a website and mobile app development company like EonTech actually deliver?

    A typical engagement covers discovery, UX and UI design, a responsive web application, an accompanying mobile web or native app where the product needs one, the APIs and back end that power both, CI/CD, and a documented handover. We are a full-cycle website and mobile app development company, so nothing that matters goes to a subcontractor.

  • How is a web and mobile app development company different from separate web and mobile vendors?

    The difference is the seams. Two vendors means two auth systems, two API contracts, and two support queues. As one web and mobile app development company we hold the design system, API, and release process across web, PWA, and native — so a feature ships to every client at the same time.

  • Do you offer custom web and mobile app development company services, or only templates?

    Custom only. We do not resell page builders or SaaS themes. As a custom web and mobile app development company we build against your actual data model, users, and business rules — that is why our clients keep the code and rebuild rarely.

  • Are you a mobile web app development company too, or just native mobile?

    Both. We ship progressive web apps and mobile-first responsive front ends that install to the home screen and work offline, and we also build native iOS/Android or React Native/Flutter clients. As a mobile web app development company we usually recommend PWAs first when app-store distribution is not a hard requirement.

  • What makes EonTech a digital web and mobile app development company, not just a code shop?

    Beyond engineering, our teams cover product discovery, UX/UI design, QA, DevOps, and custom AI/ML. So the same digital web and mobile app development company that ships the code also validates the concept, tunes the funnel, adds analytics, and hardens the release pipeline.

  • Which stack do you build on?

    We default to React, Next.js, and TypeScript on the web, Node.js or Python on the back end, and React Native, Flutter, Swift, or Kotlin on mobile. We pick proven tools, never trendy ones that fade.

  • Do we own the code?

    Yes. The repo, the pipeline, the design tokens, and the IP stay yours from commit one. There is no lock-in toolchain and no black box.

  • Where is the team based and how does time-zone overlap work?

    Senior engineers based in Poland (CET/CEST) with full-day overlap for UK, EU, and Nordics, and roughly six hours for US East Coast. You work in your time zone under strict GDPR-aligned controls, with direct engineer access.

  • Can you join an existing web or mobile project?

    Yes. We audit the code, name the risks, and extend it safely. We can also rebuild a tired app from the ground up on a staged cutover so the business keeps running.

  • How do you handle accessibility, performance, and SEO on web apps?

    WCAG 2.2 AA basics, Core Web Vitals budgets, and semantic HTML are part of the initial build spec. On marketing surfaces we add SSR/SSG, structured data, and image optimisation so the app performs in Google as well as in the browser.

  • How quickly can we start?

    Discovery calls usually happen inside a week; a first fixed-scope milestone typically starts within two to four weeks depending on team size. Monthly rolling contracts, no multi-year lock-ins.

  • Do you support integrations with our existing stack?

    Yes — CRMs, ERPs, payment rails, identity providers, analytics, and legacy SOAP endpoints. If it has an API (or even just a stable database), we can integrate it and document what we did.

Let's build

Have a web app in mind?

A short discovery call is enough to scope it. We reply with a plan, a team and a timeline — no obligation, no sales script.

Start your project [email protected]