JAN HRABOVSKÝ / SENIOR BACKEND & AI VÝVOJ
I design and build backend systems in PHP, Symfony and Nette. I help modernize legacy applications, develop APIs and integrations, and add AI where it delivers a clear product or operational benefit.
SITUATIONS / 01
I usually join when a change cuts across old code, a database, queues, search or several external systems — and still has to ship without a big-bang rewrite.
The team spends more time working around old code than building what the product actually needs.
A feature touches data, integrations, performance and operations, and needs someone to keep the full context together.
Tasks move between people, but nobody owns the design decisions and delivery into production.
A real process can be automated, but the solution needs measurable quality, cost control and safe boundaries.
SERVICES / 02
I can join an existing team or take ownership of a defined technical area. We start by clarifying the problem, the risks and a sensible scope for change.
I build production applications in PHP, Symfony, Nette and Doctrine, covering APIs, data models, integrations, performance and reliability.
I choose solutions that fit the problem and that the team can continue to maintain safely.
I identify the parts of a system that slow delivery or create the most operational risk, then order the work by actual impact.
I prefer continuous refactoring, testable steps and migrations that keep the product running over a complete rewrite.
I design integrations with language models, internal data, information extraction and automation for specific workflows.
The solution includes limits, logging, cost control and ways to verify output — not just an API connection.
PROJECTS / 03
Client commitments prevent me from publishing names and internal figures. These examples describe the areas for which I held technical responsibility.
01 / PROJECT
E-COMMERCE / LONG-TERM DELIVERY
Long-term backend development of a large e-commerce platform with substantial product data, integrations and business logic.
02 / PROJECT
SAAS / INTERNAL SYSTEM
Backend design and implementation, data flows and integrations with a focus on long-term maintainability and a clear domain model.
03 / PROJECT
AI INTEGRATION / E-COMMERCE
Design of machine-readable access to product data and controlled interfaces through which AI tools can work with an e-commerce application.
COLLABORATION / 04
Before proposing a solution, I need to know the objective, constraints and current state of the system. A well-defined problem is often the most valuable first result.
I split changes so they can be deployed, measured and rolled back as we go. This reduces risk and gives the team useful results sooner.
Performance, logging, failure modes, cost and maintenance are not afterthoughts. They belong in the design alongside implementation.
I raise risks and unknowns early. I prefer short decisions grounded in the actual code and product over long presentations.
ABOUT / 05
I am a senior backend engineer from the Czech Republic with a strong background in the PHP ecosystem, particularly Symfony, Nette and Doctrine.
Most of my work has involved long-running production systems where engineering means understanding not only the codebase, but also the domain, integrations and consequences of each change across the product.
In recent years I have also focused on practical use of language models in existing applications, including work with internal data, tools, production reliability and cost control.
I work best in long-term collaborations with product teams and on projects where I can take genuine ownership of a backend or technical area.
TECHNOLOGY / 06
PHP · Python · Symfony · Nette · Doctrine
PostgreSQL · SQL · MongoDB · Elasticsearch · Redis · Docker
REST APIs · Integrations · DDD · CQRS · Messaging
OpenAI · LLM integrations · AI agents · Tool calling · AI search readiness
CONTACT / 07
Send me a few lines about the system, the current problem and the result you need. I will reply with whether and how I can help.