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Open to new collaborations · Saarbrücken, Germany 🇩🇪

Engineer. Founder. Human.

Hey, I'm István, a freelance Software Engineer with 7+ years of experience in test automation, web & mobile development, and AI-driven solutions. Founder of QAVLAR.tech.

Python Test Automation React Native WordPress AI & LLM Docker Full-Stack
István Ékes, warm and approachable software engineer and founder, photographed in natural light
7+ Years exp.
EU Based
7+ Years of experience
20+ Projects delivered
1K+ Bugs caught & fixed
EU Projects across the EU

Services

Build

Web & E-Commerce

Websites and online stores built for speed, conversions, and long-term maintainability. Your visitors become customers, and your customers keep coming back.

  • Built for performance: Fast load times, mobile-first design, and SEO-optimised out of the box
  • E-commerce that sells: Shopify or WooCommerce, configured for conversion, not just aesthetics
  • Custom integrations: Connect your store to your CRM, ERP, or marketing tools
  • Easy to manage: A clean admin experience so you're not locked into calling me for every tiny change

App Development

Cross-platform mobile apps for iOS and Android that feel native, perform reliably, and ship to the stores without drama.

  • One codebase, two stores: React Native apps that work beautifully on both platforms
  • Full store publishing: I handle App Store and Google Play submissions, no surprises
  • Offline-first: Your app works even when the internet doesn't
  • Push notifications & real-time updates: Keep your users engaged and informed

Custom Software Development

Bespoke backend systems, APIs, and IoT solutions built to handle your unique workflow, no matter how complex.

  • Tailored to your business: Software that fits your processes, not the other way around
  • Scalable architecture: Grows with you, from 100 users to 100,000
  • Integrates with your stack: Connects to your existing CRM, ERP, or tools
  • IoT & automation: Smart systems that talk to each other (Raspberry Pi, Home Assistant, MQTT)

Automate

Business Automations

Eliminate repetitive work. Connect your tools and automate workflows so your team focuses on what matters.

  • No-code & pro-code: n8n, Zapier, or Python scripts, whatever fits your needs
  • Connect everything: CRM, email marketing, invoicing, Slack, databases, all talking to each other
  • Scheduled reports: Automated data dumps and dashboards sent to your inbox daily
  • Save hours every week: I've helped clients cut manual work by 80% or more

Automated QA & Testing

Catch bugs before your users do. From single scripts to full CI/CD-integrated test suites.

  • Comprehensive coverage: UI, API, end-to-end, and performance testing
  • CI/CD integration: Tests run automatically on every deployment, no human required
  • Clear reporting: You get actionable insights, not confusing logs
  • I've done this at scale: Fixed 1,000+ failing tests and cut execution time from 17 hours to 8 hours

AI Development & Integration

From LLM-powered features to full AI agents, adding intelligence to your products and workflows.

  • Custom AI agents: Built for your specific use case, not a generic chatbot
  • LLM & RAG integration: OpenAI, open-source models, or hybrid: I'll find what works
  • Content generation: AI-powered marketing, copywriting, and social media workflows
  • Automated AI pipelines: n8n + Python + LLMs working together

Advise

Tech Consultation

Stuck on a technical decision? Get vendor-neutral advice from someone who's been there.

  • Architecture reviews: Is your system going to scale? Let's find out before it breaks
  • Tech stack selection: Choose the right tools for your specific needs, not what's trendy
  • Emergency debugging: Production outage? I can help triage and fix it
  • Code reviews & audits: A fresh pair of eyes on your codebase

Need something not listed?

I love a challenge. If your problem doesn't fit neatly into a category, reach out: chances are I've solved something similar before.

Let's talk

About me

István Ékes, relaxed and curious, in a candid moment
🇭🇺 → 🇩🇪
Budapest → Saarbrücken Senior Engineer

I fix broken software. And I'm really good at it.

I'm István. I'm the person companies call when their test suite takes 17 hours to run, their mobile app crashes on launch, or their AI integration is outputting gibberish.

Born in Budapest, now based in Saarbrücken. I combine Hungarian creativity with the precision and reliability that clients in the DACH region expect. I communicate clearly in English (C1) and Hungarian (native). I also speak professional German (B1, actively working towards B2). I understand technical documentation and day-to-day conversations, but for complex project discussions, we'll work best in English.

Why clients hire me

I reduce costs, not just write code.

When a client's test suite was taking 17 hours to run, I fixed 1,000+ failing tests and cut execution time to 8 hours. That's not just engineering, that's saving thousands in DevOps costs and enabling daily deployments.

I build things that actually work in production.

From AI-powered recommendation systems to cross-platform mobile apps, I don't stop at "it works on my machine." I deliver reliable, scalable solutions that handle real users, real data, and real-world edge cases.

I'm EU-based. Data protection isn't an afterthought.

GDPR compliance, German hosting, and SSL encryption are built into everything I do. Your data stays in Europe, no surprises, no compromises.

My philosophy: Technology should be boring

If it works perfectly, nobody notices. My job is to make the complex invisible, so you can focus on your business.

Practical Solutions Over Perfection

I don't chase unnecessary complexity. I use tools that work reliably in your specific environment.

Continuous Improvement

Every project is an opportunity to refine and optimise, whether it's streamlining test automation or simplifying a clunky workflow.

Clear Communication

Regular updates, no jargon, no surprises. You know exactly what's happening at every stage.

Technology in Service of People

Every system exists to help users. I build with human factors front and centre: intuitive interfaces and maintainable architectures.

Work Experience

2024 - Present

Freelance Software Engineer

Full Project Lifecycle · Saarbrücken, Germany

Full freelance delivery

  • End-to-end project management: client acquisition, requirements gathering, estimation, development, testing, deployment, maintenance, and invoicing
  • Direct client communication, technical consulting, and long-term relationship management
  • All business operations: contract negotiation, accounting, tax declarations, and vendor management

Technical execution

  • Process automation using Python (data handling, reporting, workflow tasks)
  • AI & Generative AI integrations for marketing, content, and customer interaction
  • Full-stack web development (WordPress, Shopify, React, Next.js)
  • Cross-platform mobile app development (React Native, Android & iOS)
  • Test automation framework architecture & QA engineering
  • Production deployment and post-launch maintenance
2021 - 2023

Test Automation Engineer

XRoadMedia GmbH · Austria

  • End-to-end test automation for an AI-powered real-time personalisation & recommendation system (REST API)
  • Fixed 1,000+ failing tests; reduced execution time from 17 hours to 8 hours
  • Integrated tests into CI/CD pipeline for automated daily runs
  • Reported directly to stakeholders with clear, jargon-free metrics
2019 - 2021

Software Engineer

Rubin Informatika · Hungary

  • Built a new Python test framework for a real-time pricing system
  • Coded hundreds of automated tests and wrote Python data-processing daemons
  • Presented new features and developments directly to customers (early client-facing experience)
  • Managed feature delivery from specification to production deployment
2019

Frontend Developer

CAE Healthcare · Hungary

  • Web application for health education, Angular / TypeScript frontend, Perl backend
  • Collaborated with international team across Hungary and USA

Education & Certificates

2016 - 2019

Computer Science BSc

University of Pannonia, Hungary

Thesis: Dashboard for monitoring an automatic distributed system. Also programmed a LEGO EV3 robot to play football in Python.

2019

CCNA Security Certificate

Cisco · via University of Pannonia

In progress

Machine Learning Crash Course

Google

The person behind the work

I'm a tinkerer at heart. I run Home Assistant at home, experiment with LLMs on weekends, and I'm currently teaching myself machine learning (Google's crash course, it's free and excellent).

Fun fact: During my Computer Science BSc at the University of Pannonia, I programmed a LEGO EV3 robot to play football using Python.

Whether you need an emergency debug, a full app build, or just a second opinion on your tech stack, reach out. I reply within 24 hours.

Skills & Technologies

Programming

PythonPerlPHPC / C++C#BashKotlinCommon Lisp

Web

JavaScriptTypeScriptHTML5CSSReactNext.jsAngularTailwindNode.jsReact NativeTauriMedusa.jsWordPressShopify

Databases

PostgreSQLMySQLOracle SQLMS SQLSQLiteSupabaseRedis

Testing

PyTestJestPlaywrightSeleniumAppiumPostmanBrowserstackSikuliXTestomatBDD

DevOps & Tools

DockerGitCI/CDCloud/VPSMQTTJIRAConfluenceStripeSVNMercurial

AI & Smart Home

OpenAI / LLMRAGn8nZapierHome AssistantRaspberry Pi

Portfolio

My full portfolio, case studies, and client projects are on my brand's page.

View portfolio at QAVLAR.tech