Curriculum Vitae - Professional Experience

Summary

Senior software engineer and frontend tech lead with 20+ years of hands-on experience in Angular, TypeScript, PHP, .NET and Node.js. Skilled in designing scalable architectures, leading teams, and bridging product, UX, and engineering. Passionate about future-proof code, automation, and developer experience - from concept to deployment and further.

Contact

E-mail: <your.name>﹫cv.co.hu
LinkedIn: https://www.linkedin.com/in/szellcsaba/
Github / self-hosted forge: https://forge.deejayy.hu/

Education

2006 - BSc in Computer Science, Software Developer

Skills

  • Frontend: Angular • TypeScript • RxJS • NgRx • SCSS
  • Backend: PHP • .NET • Node.js • NestJS • REST • GraphQL
  • Infra & Tooling: Linux • CI/CD • Git • Virtualization • Docker • Self-hosting
  • Databases: MSSQL • Oracle • PostgreSQL • MySQL
  • Soft Skills: Technical Leadership • Architecture • Mentoring • Curiosity • Sarcasm
  • AI/LLM: Claude • OpenCode • Ollama • LangChain • ChatGPT • Embedding • Agentic
  • Others: Figma • Agile • Open Source • Freelancing • Blogging

Experience

Frontend Technical Lead - Starschema Ltd / HCLTech (2017-Present)

  • Lead a team of 5-7 developers building enterprise web apps for logistics and data analytics clients (Angular 4-21, RxJS, NgRx, TypeScript).
  • Defined architecture and coding standards, reviewed code, and mentored team members.
  • Collaborated with UX, backend, and product teams to deliver performant, maintainable UI systems.
  • Notable work: Port Optimizer product family (Los Angeles US, Gothenburg SE) - Angular SPA integrated with big data backend and CI/CD pipelines.
Tech: Angular, RxJS, NgRx, TypeScript, SCSS, Jest, ESLint, Git, REST, JWT, CI/CD

Freelance Web Developer / Open Source Contributor (2003-Present)

  • Delivered 40+ projects including webshops, CRMs, and internal business tools.
  • Created and maintained open-source libraries (Angular Bootstrap App, API Caller, Reactive Config).
  • Contributed to community projects and UI kits (Lounge Theme, Lapce Icon Set).
Tech: Angular, Node.js, PHP, MySQL, Bootstrap, SCSS, Git

Database Administrator - T-Systems Hungary (2014-2017)

  • Managed over 600 Oracle and MSSQL databases, leading migration and upgrade projects.
  • Automated maintenance workflows, backups, and deployments using scripting.
  • Provided performance tuning and security hardening guidance to clients.
Tech: Oracle 12g, MSSQL 2012-2014, RAC, Clustering, Linux

Systems Engineer - Kravtex Ltd (2008-2014)

  • Designed and implemented a Linux-based corporate network with virtualization (Xen) and essential services (Samba, Postfix, PowerDNS).
  • Developed web-based internal applications for inventory management, technical drawings, and invoicing using PHP and MySQL.
  • Standardized Windows workstation environments for office use.
Tech: Linux, Xen, Apache, PHP, MySQL, Samba, iptables, Postfix, PowerDNS, LDAP, OpenVPN

Database Administrator - IQSys (2006-2008)

  • Administered Oracle 9i/10g and MSSQL 2000/2005 databases, ensuring high availability and performance.
  • Automated routine tasks through scripting to enhance efficiency.
  • Supported ETL processes between HP MPE/IX and Oracle databases.
  • Consolidated hundreds of Oracle databases for Audi Hungary.
Tech: Oracle 9i-10g, RAC, OCA, MSSQL 2000-2005, Clustering, Oracle E-Business 11i