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Peter HolzerPH

Peter Holzer

Senior Backend Software Engineer | PO, PM & TL

€760/day
Wien, AT
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Peter

I have spent the last 5 years building an IoT platform as a lead developer at a large B2B trading company that also developed its own products. However, I have also worked for companies in the energy sector, for example.

I completed a Master's degree in Computer Science at TU Wien, have been working as a backend developer for 10 years (4 years as an employee + 6 years as a freelancer), and am more than familiar with Node.JS, NestJS, RESTful/GraphQL, TypeScript/JavaScript, PostgreSQL, and AWS.

In addition to technical experience, I also have experience in leading development teams and managing software projects, including technical product ownership.
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Wien (up to 50km)

Experience

  • Selbstständig
    Software Engineer
    INTERNET OF THINGS (IOT)
    May 2020 - Today (6 years and 3 months)
    Göllersdorf, NO, Austria
    Self-Employed Conception, design and engineering of websites, web- & mobile- apps and all kind of other applications based on customer needs; deploying and hosting of applications as well as maintenance of them; consulting in the field of software engineering; used technologies: JavaScript/TypeScript, NodeJS, NestJS, TypeORM, RESTful & GraphQL-based APIs, MQTT, Pub/ Sub, NPM, Angular, VueJS, HTML & CSS, SQL & NoSQL, Postgres, MongoDB, AWS, Docker/ Kubernetes, Bamboo/Jenkins; full-time Most Recent Projects
    • • IoT platform for smart agri-forestry devices, including backend development and dedicated web/support interfaces.
    • • Online configurator for the assembly of complex pasture fencing systems.
    • •Web application for the parameterization, control, and analysis of a laser system used in quantum computing environments.
    • •Web app for automated smart device orchestration based on energy source and availability, featuring predictive analytics for consumption and production.
    Node.js NestJs
  • eFriends Energy GmbH
    Software Engineer
    ENERGY AND UTILITIES
    May 2019 - April 2020 (11 months)
    Nappersdorf, NO, Austria
    Software development and systematic testing of software components, defining design and architecture in an energy trading environment, frontend and backend development, deploying agile operating principles (SCRUM), etc.; used technologies: JavaScript, TypeScript, VueJS, NodeJS, SQL, HTML, CSS, Docker; part-time (20 hours per week)
    Typescript Node.js
  • AITAustrian Institute of Technology GmbH
    Graduand (Dipl.-Ing.)
    RESEARCH
    October 2019 - March 2020 (5 months)
    Vienna, Austria
    Research in the field of crypto currencies, blockchains, distributed ledger technologies (architectures, security vulnerabilities, privacy leaks, etc.) and development of analysis approaches for second layer networks, especially for the Lightning Network (Bitcoin’s 2nd payment channel network); thesis title: “Payment Channel Network Analysis with Focus on Lightning Network”; used technologies: JavaScript, Python, SQL; temporary to 03/ 2020; part-time (20 hours per week)
    Python GO

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Education

  • Executive Education (Remote)
    Chicago Booth School Of Business
    2026
    Executive Education (Remote)
  • Certified trainer for adult education
    Wirtschaftsförderungsinstitut (Wifi), Trainerakademie
    2025
    Certified trainer for adult education

Skill set

Categories