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Roman Vašek, freelance full-stack developer

8 years of building information systems, owning the whole path from design to deployment.

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years of experience
8
reference projects
6

Services

What I do

From the first design to running in production, or taking over a system that already runs.

  • 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.

Approach

What I focus on

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.

Process

How we work together

  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.

Work

References

Projects I delivered, with the result first.

  • Axman Lounge

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

  • Direct Fidoo

    Delivered via Qest
    Result
    Cards and transactions are processed without manual steps.
    Problem
    A payment card platform needed its card issuer wired to internal services.
    Solution
    Thredd integrations and Azure services backed by CosmosDB.

  • OPT On Demand

    Delivered via Qest
    Result
    Terminals update themselves, with no trip to the floor.
    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.

  • Aeqoom

    Delivered via Qest
    Result
    Jobs are recorded in the field instead of after the drive back.
    Problem
    Field service technicians needed job tracking on a phone.
    Solution
    Two Expo applications over one backend, plus an experiment with AR glasses.

  • GlampingCZ

    Delivered via Qest
    Result
    Bookings and payments have run as one flow from day one.
    Problem
    A booking system built from nothing, including background order processing.
    Solution
    A NestJS backend on AWS with an SQS queue for orders.

  • ČSOB

    Delivered via Enimo
    Result
    The services run in production in an application used by hundreds of thousands of people.
    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.

Tools

Stack

Frontend

  • React
  • Vue
  • TypeScript
  • Tailwind
  • Expo
  • Electron

Backend

  • Node
  • Bun
  • NestJS
  • Elysia
  • PostgreSQL
  • BullMQ
  • REST
  • GraphQL

Infrastructure

  • Docker
  • AWS
  • GCP
  • Azure
  • Sentry
  • CI/CD

Have a project that needs to get over the line? Tell me about it.

Start a project

Email me

Tell me what you need and by when.

roman@vengex.com
Start a project