Justas Azna, Developer in Copenhagen, Denmark
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Justas Azna

Verified Expert  in Engineering

Software Developer

Copenhagen, Denmark
Toptal Member Since
August 25, 2016

Justas is a web developer and DevOps engineer based out of Denmark. For the past three years, he has been a partner in a web development company. He works mostly on Python and Node.js-based applications with a focus on APIs, software architecture, and deployment automation.


Novozymes A/S
React, Node.js, Linux, Ceph, RabbitMQ, Solr, Hadoop, Spark, HBase, Django...
Amazon Web Services (AWS), DigitalOcean, Docker, Puppet, MySQL, PostgreSQL, PHP...
Alexandra Institute
Linux, PostgreSQL, MySQL, Java, PHP, Python




Preferred Environment

Git, Vim Text Editor, Arch Linux, Red Hat Linux, Debian Linux

The most amazing...

...thing I've developed is a D3.js-based linked data explorer. I used architecture defined in SoLiD-spec for doing a decentralized social web.

Work Experience

Software Development Consultant

2018 - PRESENT
Novozymes A/S
  • Developed features for an internal big data platform using Python and Node.js.
  • Implemented parsers and ingested large volumes of raw DNA and protein data into HBase using Spark and map-reduce.
  • Backfilled Solr search indices and HBase tables using Spark and map-reduce.
  • Created performance profiles and improvements of critical back-end algorithms using cProfile and Python.
  • Parallelized BLAST (Basic Local Alignment Search Tool) workers to get faster protein and DNA sequence alignment results using Python, RabbitMQ, and multiprocessing.
  • Implemented data access restrictions for HBase and Solr.
Technologies: React, Node.js, Linux, Ceph, RabbitMQ, Solr, Hadoop, Spark, HBase, Django, Python

Software Engineer/Partner

2013 - PRESENT
  • Developed software and provided system administration for IPVISION A/S: Mobile Virtual Network Operator (MVNO).
  • Created software and provided system administration for Grundfos A/S. Worked on the implementation of their IoT platform, Gatesense.
  • Built software for Alexandra Institute A/S. Worked on an open data portal implementation.
  • Developed software for Bitshifters ApS: Implemented a next-generation building intelligence management (BIM) system.
  • Managed projects, developed software, and did DevOps for Visualize Wealth, LLC. Worked on releasing the MVC of Viziphi.com, a financial risk analysis system.
  • Developed software for Davoodi Pty, Ltd., working on the Automed.io platform.
  • Built Hopper.dk, a local service search engine.
  • Created Playsignage.com, a digital signage SaaS.
  • Developed software for Sirenia ApS. Worked on CCOW context management registry using Go.
Technologies: Amazon Web Services (AWS), DigitalOcean, Docker, Puppet, MySQL, PostgreSQL, PHP, CoffeeScript, JavaScript, Node.js, Python

Software Developer

2014 - 2014
Alexandra Institute
  • Implemented a free software plugin for CKAN open data portal software. The plugin enables real-time events from CKAN's datastores.
  • Implemented Drupal/CKAN integration for user management.
  • Developed a RESTful API for the Gatesense IoT platform using Java (Spring MVC).
Technologies: Linux, PostgreSQL, MySQL, Java, PHP, Python

Software Developer/Sysadmin

2013 - 2014
  • Re-implemented an old phone usage accounting system.
  • Implemented a call center wallboard solution, an order handling system integrated with a payment gateway and two different mobile network operators (MNO), and self-service portals for B2B and private users.
Technologies: WebSockets, ZeroMQ, Perl, Debian, MySQL, Python, PHP, Drupal, Asterisk

Software Development Intern

2012 - 2012
  • Wrote a backup utility using C#.
  • Conducted research of real-time web libraries for .NET.
Technologies: Windows Presentation Foundation (WPF), C#, .NET

"Play" Digital Signage SaaS

This is my company's product, a digital signage SaaS. In this project, I am working on a RESTful API, puppet infrastructure code, and digital signage player software.
2013 - 2014

Professional Degree in Software Development

Business Academy Aarhus - Aarhus, Denmark

2009 - 2013

Academic Profession Degree (AP) in Computer Science

Business Academy Aarhus - Aarhus, Denmark


Node.js, Stormpath, ZeroMQ, React, Auth0 API


NGINX, Git, GitHub, Bitbucket, GitLab, Atlassian Suite, Solr, Biopython, RabbitMQ, Apache, Vagrant, Docker Compose, Vim Text Editor, Asterisk, Puppet, Jenkins, Jekyll


Apache Spark, Flask, Express.js, Django, .NET, Windows Presentation Foundation (WPF), Spark, Hadoop, Bootstrap 3, Scrapy, Sails.js


Markdown, Python 3, CoffeeScript, JavaScript, Python, Go, HTML5, RDF, C#, PHP, Perl, Java, Scala


Linux, Docker, Amazon Web Services (AWS), Debian Linux, Red Hat Linux, Arch Linux, Drupal, Debian, DigitalOcean


HBase, PostgreSQL, MySQL, CouchDB, Redis, Ceph, MongoDB


MapReduce, Kanban, Test-driven Development (TDD), REST, Continuous Deployment, Scrum, Agile, Functional Programming


Unix Shell Scripting, Technical Project Management, Payment Gateways, WebSockets, Lean Startups

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