David Hošek
CV

David Hošek

Full-Stack Software Engineer

AI-First Product Builder

Portrait of David Hošek

I connect backend, frontend, data and operations with product understanding — from a high-level requirement to a working solution.

  • Java / Spring Boot
  • TypeScript / React
  • PHP
  • PostgreSQL

Open to full-time and long-term contract opportunities · Remote or hybrid in Prague

Selected WorkContact

Selected Work

Own products and enterprise work, connected to real users and operational needs.

WAPP / Subway Simulator: Prague

  • Unity
  • C#
  • Blender
  • GIMP
  • AI-assisted development

Earlier released mobile subway games, followed by a pause and the 2026 revival as Subway Simulator: Prague. Current Unity / C# development is mobile-first, with custom tooling and procedural or parametric generation.

My roleProduct ownership, development and tooling

Product context
  • Basic 3D work — historically SketchUp, currently Blender — plus geometry, material and texture preparation, AI-assisted texture enhancement and upscaling, and small corrective edits in GIMP.
  • I handle enough 3D work to prepare assets and unblock development, iterating on small changes without depending on a dedicated artist for every detail.

View case study

External links

Kačerov station in Subway Simulator: Prague, with a lit platform, tiled columns and tracks.
Subway Simulator: Prague · Current development · Kačerov
Unity editor showing a curved tunnel with rails and cables alongside the tunnel generator settings.
Subway Simulator: Prague · Current tunnel generator
Kačerov station model in Blender, with a selected platform column and the scene object list.
Subway Simulator: Prague · Current asset workflow

WAPP / Subway Simulator: Prague · Image viewer

Couple Quiz

  • Flutter
  • RevenueCat
  • AdMob

My production mobile product for iOS and Android, built in Flutter and operated since 2026. It has real users and paying subscribers.

My roleProduct development and production operation

Product context
  • Subscriptions with RevenueCat, AdMob advertising and localization; responsibility from application development and store release to ongoing operation.

View case study

External links

Couple Quiz on a rendered phone, showing a partner question and five possible answers.
Question flow
Couple Quiz store image showing the Classic, Hardcore, Extreme and Spicy question packs.
Choose a question pack
Couple Quiz store image showing a match when both partners choose an experience together.
A shared answer

Couple Quiz · Image viewer

Enterprise Software / Integrations

  • Java / Spring Boot
  • React
  • PHP
  • Liferay
  • REST APIs
  • RabbitMQ
  • Flyway
  • Liquibase
  • Hibernate / JPA

Insurance journeys, logistics systems and integrations. At Rohlik, direct operational experience grew into internal product creation, international process rollout and full-stack engineering.

My roleFull-stack development, internal tooling and process engineering

Product context
  • Internal Logistics Data Platform: a local C# dispatch utility became a PHP/JavaScript web platform for capacity aggregation, multi-source operational views, longer-route and telematics-based private-mileage calculations, and central operational records for courier business partners.
  • Courier Operations Portal: delivered after winning a public tender. Financial and invoicing-related views, operational block registration, management communication and priority-message acknowledgement, document uploads including insurance documents, customer ratings and performance, multilingual UI, internal/REST and legacy Google Sheets integrations, barcode scanning for returnable packaging and an editable CNG station map.
  • The portal adapted quickly to changing operational and regulatory needs during the COVID period.

View case study

Internal Logistics Data Platform — quality-profile interface with operational metrics; identifying fields are blurred.
Internal Logistics Data Platform

Enterprise Software / Integrations · Image viewer

Progity / selected side and client work

  • Java / Spring Boot
  • PHP
  • React
  • Flutter

Custom business software, integrations and own digital products alongside primary employment. Ownership of architecture, backend, frontend, deployment and long-term operation.

My roleFounder and software developer

Product context
  • Shipvise — paused concept: designed and prototyped a managed deployment and software-review platform. Early validation did not show enough demand to justify continued investment, so active development is paused with the architecture and functional foundation retained.

External links

Shipvise prototype project overview with Code, Preview, Review and Production workflow stages using test data.
Shipvise · Paused prototype

Progity / selected side and client work · Image viewer

Experience & About

From last-mile operations to internal products, international process rollout and full-stack software engineering. Side projects run alongside primary employment.

Rohlik: from operations to engineering

  1. Operations
  2. Internal tooling
  3. Process engineering
  4. International rollout
  5. Full-stack engineering

  1. May 2025 – Oct 2026

    Java / Full-Stack Developer

    Generali Česká pojišťovna

    Customer-facing web systems: online insurance journeys across three non-life product lines and frontend-focused campaign pages.

    Responsibilities & context
    • Java / Spring Boot and Liferay development, including custom widgets and portlets, REST APIs and API Gateway integrations.
    • Full-stack insurance journeys, database changes with Liquibase, and CI/CD through Git and pull-request deployment workflows in Kubernetes-based environments.
    • Implementation, debugging and testing of Salesforce Marketing Cloud integrations.
    • Java / Spring Boot
    • Liferay
    • REST APIs
    • Liquibase
    • Kubernetes
    • CI/CD
    • Salesforce Marketing Cloud

  2. Jan 2024 – Present

    Founder / Software Developer

    Progity

    Long-running side and business software work alongside primary employment: custom business software, integrations and own digital products.

    Responsibilities & context
    • Ownership of analysis, architecture, backend, frontend, deployment and long-term operation.
    • Development with Java / Spring Boot, PHP, React and Flutter according to each product's needs.
    • Designed and prototyped Shipvise, a managed deployment and software-review platform. Early validation did not show enough demand for further investment, so I paused active development while retaining its architecture and functional foundation.
    • Java / Spring Boot
    • PHP
    • React
    • Flutter

  3. Jun 2021 – Feb 2025

    Full-Stack Developer

    Rohlik Group

    A progression from operations and internal tooling through logistics process design and international rollout to full-stack engineering.

    Responsibilities & context
    • Migrating internally developed logistics applications towards Java / Spring Boot, React and Google Cloud; work on other internal Java/React systems according to team priorities.
    • Maintaining legacy PHP applications and tracing business logic in Nette, Doctrine and existing code; REST/API integrations, RabbitMQ and database migrations with Flyway.
    • Delivery through CI/CD, Google Cloud, OpenShift, ArgoCD and GitHub Actions.
    • I worked in a dynamic environment where priorities changed quickly and engineering decisions had visible operational impact. I actively gathered context and took ownership of solutions beyond isolated tickets.
    • Java / Spring Boot
    • React
    • PHP
    • Nette
    • Doctrine
    • REST APIs
    • RabbitMQ
    • Flyway
    • Google Cloud
    • OpenShift
    • ArgoCD
    • GitHub Actions

  4. Jan 2020 – Jun 2021

    Logistics Process Manager — International Expansion

    Rohlik Group

    Design, optimization and rollout of logistics processes in Czechia, Hungary, Austria, Germany, Italy and Romania.

    Responsibilities & context
    • Supporting international expansion while keeping process and system design close to real operations.
    • Translating operational requirements into software and reporting needs; continued development of the Courier Operations Portal.

  5. Oct 2018 – Jul 2019

    Co-founder / Technical Lead

    esgame s.r.o.

    Co-created and operated a themed escape-room experience inspired by the period before 1989.

    Responsibilities & context
    • Co-authored the story and puzzles; built a reservation portal with payments and partner voucher redemption.
    • Designed and programmed electronic game elements and prototypes, and implemented the physical space.

  6. Sep 2016 – Dec 2019

    Logistics Dispatcher

    Rohlik.cz

    Day-to-day last-mile coordination in Prague and the surrounding area became the starting point for internal logistics products.

    Responsibilities & context
    • Capacity management, route changes, courier communication and incident handling.
    • Built the Internal Logistics Data Platform when dispatch needed a consolidated operational view and central IT had other priorities. A local C# Windows desktop tool grew into a PHP/JavaScript web platform used by dispatch, coordinators and logistics management.
    • Delivered the Courier Operations Portal after winning a public tender, keeping development close to the operation.
    • C#
    • PHP
    • JavaScript
    • HTML5 / CSS

  7. Jun 2015 – Jun 2021

    Courier · Part-time

    Rohlik.cz

    Online-grocery delivery and direct experience of last-mile operations, alongside subsequent roles.

    Responsibilities & context
    • First-hand understanding of courier workflows and the operational reality behind later tooling and process decisions.

  8. Apr 2015 – Jan 2021

    Founder / Software Developer

    Wapp.cz

    Own software products, mobile games and custom applications — the historical WAPP development phase.

    Responsibilities & context
    • Product lifecycle from concept and technical design through release, analytics and long-term maintenance.
    • Built and released Subway Simulator Prague Metro and Subway Simulator New York in Unity / C# for Android. After a pause, the product lineage was revived in 2026 as Subway Simulator: Prague under WAPP.
    • Unity
    • C#

AI-First Engineering

AI is an engineering multiplier. I use it to understand context faster, decompose problems, implement, review, test and iterate. Human judgment remains responsible for the decisions and the result.

AI proposes. Engineer decides.

I don’t use AI to avoid understanding the code. I use it to get to understanding and implementation faster.

Engineering judgment throughout

Product decisions · Architecture · Trade-offs · Final acceptance

  1. Context

    1. Build context

      Understand users, the codebase, operational reality and constraints.

    2. Analyze & challenge assumptions

      Refine requirements, compare approaches and surface unknowns.

    3. Decompose & plan

      Turn the problem into concrete steps and acceptance criteria.

  2. Build

    1. Implement with constraints

      Build in small steps, respecting architecture, scope and existing contracts.

  3. Verify

    1. Test & validate

      Check behavior, failure paths and assumptions against evidence.

    2. Review critically

      Challenge correctness, maintainability and unintended effects.

    3. Check security & risk where relevant

      Assess exposure, privacy and operational risk when the change warrants it.

  4. Decide

    1. Human decision & delivery

      The engineer owns product decisions, architecture, trade-offs and final acceptance.

Review loops

  • Failed checks return to implementation, then validation.
  • Review findings can reopen context and the plan.

The depth of the process follows complexity and risk; not every task needs every stage. Feedback can reopen context, the plan or implementation. Human judgment guides the work throughout and determines final acceptance.

Where AI helps

Codebase analysis, requirement refinement, architecture comparison, implementation, migration planning, debugging, refactoring, tests, reviews, documentation, product ideation and asset preparation.

Repository evidence

See how this approach is codified in the portfolio repository: shared rules, canonical skills, Claude/OpenAI adapters and review loops.

  • Repository rulesAGENTS.md
  • Canonical shared skillsdocs/ai/skills/
  • Claude adapters.claude/skills/
  • OpenAI/Codex adapters.agents/skills/
  • Review workflowdocs/ai/workflow.md

Engineering Stack

Technologies grouped by responsibility, with the context in which I use them.

Backend & services

Java / Spring Boot and PHP in insurance and logistics systems; tracing existing Nette/Doctrine business logic at Rohlik.

  • Java 17/21
  • JVM
  • Spring Boot 3
  • PHP 8.x
  • REST APIs
  • RabbitMQ
  • Nette
  • Doctrine

Frontend & product UI

React in Rohlik and Progity work; frontend-focused insurance campaigns and custom Liferay widgets/portlets at Generali.

  • TypeScript / React
  • JavaScript
  • HTML5 / CSS
  • Liferay

Data & persistence

PostgreSQL and MySQL/MariaDB in side-project infrastructure. Flyway, REST and RabbitMQ at Rohlik; Liquibase and Salesforce Marketing Cloud integrations at Generali.

  • PostgreSQL
  • MySQL / MariaDB
  • SQL
  • Hibernate / JPA
  • jOOQ
  • Flyway
  • Liquibase
  • Testcontainers
  • Salesforce Marketing Cloud

Infrastructure & operations

Own Linux VPS and container operations; Google Cloud, OpenShift, ArgoCD and GitHub Actions in Rohlik delivery workflows, and Kubernetes-based environments at Generali.

  • Linux VPS
  • Docker / Docker Compose
  • Kubernetes
  • k3s
  • Traefik
  • Grafana
  • Google Cloud
  • OpenShift
  • ArgoCD
  • GitHub Actions

Mobile & simulation

Flutter for Couple Quiz and own products. Unity / C# and basic asset preparation for WAPP; RevenueCat and AdMob in Couple Quiz.

  • Flutter
  • Unity
  • C#
  • RevenueCat
  • AdMob
  • Blender
  • GIMP

AI-assisted engineering

Build context, compare approaches, decompose problems and iterate through implementation, testing and critical review. Human judgment owns the decisions and final acceptance.

  • AI-assisted development
  • Product & Process Engineering

Infrastructure & Operations

Building software includes deploying, maintaining and operating it.

I operate real side-project infrastructure myself: web applications and APIs on Linux VPS, with containers, databases, deployments, monitoring and ongoing maintenance.

  • Linux VPS
  • Docker / Docker Compose
  • Kubernetes
  • k3s
  • PostgreSQL
  • MySQL / MariaDB
  • Grafana
  • Traefik

Responsibilities

  • Docker / Docker Compose and k3s / Kubernetes, with PostgreSQL and MySQL / MariaDB.
  • Traefik reverse proxy, Grafana monitoring, application deployments and maintenance.
  • Self-hosted mail infrastructure for multiple personal and project domains.

Decisions & lessons

  • Building a product also means taking responsibility for its deployment and long-term operation.

CV & Contact

Explore my CV, connect on LinkedIn or GitHub, or send me an email.