Custom software · since 2020

Software thatfits the wayyou actually work.

TopSoft4U, a software firm based in Biała Podlaska, designs, builds, and integrates websites, web applications, custom systems, and mobile solutions - shaped to your process and made to scale. We work locally and remotely across Poland and the EU.

Get in touchExplore services
2020Founded
100%Custom-built
EUBased & GDPR-ready
deploy.ts — topsoft4u
// shipped for you, owned by youexport async function build(client) { const app = await design({ fit: "your workflow", load: 0.8 /* seconds */, offline: true, }); return app.scale();}
Deployed · 0.8s load
98 Lighthouse
What we do

One team, the full build.

From first sketch to a system you run for years, these are the services we ship most.

01

Custom Software

Tailored systems modelled on your real workflows, not a template forced to fit. From internal tools to customer-facing platforms.

ArchitectureAPIsDashboards
02

Web Applications

Fast, reliable web apps with clean UX and a maintainable codebase. Built to grow with your team and your traffic.

ReactNodeTypeScript
03

Websites & PWAs

Marketing sites and progressive web apps that load instantly, work offline, and turn visitors into customers.

PWASEOOffline
04

System Integration

We connect the tools you already use, from payments and CRMs to ERPs and third-party APIs, into one coherent system that just works.

RESTWebhooksSync
05

Performance & Optimization

Slow software costs you customers. We profile, refactor, and tune until pages load in milliseconds and bills drop.

Core Web VitalsCachingAudit
06

Support & Maintenance

Long-term partnership, not a hand-off. Monitoring, security updates, and a roadmap that keeps your product current.

SLAMonitoringRoadmap
All services & process
Selected work

Real products, running in production.

A reusable commerce platform powering multiple stores, a server control panel, and more on the way.

Selected work

ProQoS

An all-in-one platform that runs the business: orders, invoicing, warehouse, complaints and CRM in a single panel.

e-hedo.plB2C retailmagboss.plB2C retailb2b.onesto-energy.plB2B wholesalee-Hedo · App StoreiOS appe-Hedo · Google PlayAndroid app
Co-created withTechnalab
magboss.pl
magboss.pl screenshot
All work
Why performance is the product

A beautiful site nobody waits for is a beautiful site nobody sees.

If a page isn't usable within the first few seconds, most visitors leave. We treat speed as a feature: measured, budgeted, and protected on every release.

Sub-second loads

Optimized assets, smart caching, and lean code paths, not bloat shipped to the browser.

Works offline

Progressive web apps keep core content and actions available, even on a flaky connection.

Found on search

Performance and clean markup feed directly into ranking and conversion.

98
Performance
100
Best Practices

// representative target scores

5+yrs
Shipping production software since 2020
<1s
Target load time on every build
100%
Code we own and document, no black boxes
24/7
Monitoring on supported products
From the blog

Writing on building software that lasts.

All articles
Strategy
18 Feb 20264 min read

Custom software vs off-the-shelf: when building actually pays off

Off-the-shelf tools are cheap to start and expensive to outgrow. Here's how to tell when a custom build is the rational choice, not the indulgent one.

Read article
Performance
29 Jan 20264 min read

Performance is a feature: a practical guide to fast web apps

A beautiful site nobody waits for is a beautiful site nobody sees. A field guide to treating speed as a budget you protect on every release.

Read article
Engineering
12 Jan 20264 min read

Progressive Web Apps: offline-first software for real businesses

Installable, offline-capable, and delivered through a URL. What a PWA is, when it beats a native app, and where it doesn't.

Read article

Have something in mind? Let's scope it.

Tell us about your project and we'll come back within one business day with honest, practical next steps.

Get in touchSee what we do