Roman Vašek — freelance full-stack developer

Information systems from scratch

From the first domain design to running in production.

Taking over and developing an existing system

I take over a system that is already running and move it forward without stopping it.

Backend and architecture

Data model, API, queues, integrations, and what happens under load.

Mobile and desktop

Applications in Expo and Electron that run unattended.

Integrations

Connections to payments, registers and third-party systems.

Usability

An interface where the work gets done faster than before.

Performance

Measured, not estimated.

Delivering the whole path

From design to deployment and operation, not just handing off code.

Transparency

At any point you know what I am working on and what it will cost.

Sustainability

Code that someone else can take over from me.

1. Consultation — what is needed and whether I can deliver it.
2. Quote with scope and timeline.
3. Order with an agreed date.
4. Iterative development with progress shown along the way.
5. Handover with an acceptance protocol.
6. Support and further development.

• Axman Lounge

  Problem

  Office bookings, payments and invoicing lived outside any system and were redone by hand each month.

  Solution

  I built the whole application alone: bookings, payments and automatic invoicing.

  Result

  The monthly close runs itself and a booking takes a minute.

• Direct Fidoo

  Via Qest

  Problem

  A payment card platform needed its card issuer wired to internal services.

  Solution

  Thredd integrations and Azure services backed by CosmosDB.

  Result

  Cards and transactions are processed without manual steps.

• OPT On Demand

  Via Qest

  Problem

  A shop-floor production terminal had to run unattended and update itself.

  Solution

  An Electron application with auto-update and a NestJS backend on GCP.

  Result

  Terminals update themselves, with no trip to the floor.

• Aeqoom

  Via Qest

  Problem

  Field service technicians needed job tracking on a phone.

  Solution

  Two Expo applications over one backend, plus an experiment with AR glasses.

  Result

  Jobs are recorded in the field instead of after the drive back.

• GlampingCZ

  Via Qest

  Problem

  A booking system built from nothing, including background order processing.

  Solution

  A NestJS backend on AWS with an SQS queue for orders.

  Result

  Bookings and payments have run as one flow from day one.

• ČSOB

  Via Enimo

  Problem

  A bank's mobile application needed new services inside an existing microservice architecture.

  Solution

  Microservice development inside the vendor's team, under the bank's security rules.

  Result

  The services run in production in an application used by hundreds of thousands of people.

Tell me what you need and by when.