Justus is available for hire
Hire JustusJustus Burger
Verified Expert in Engineering
Software Developer
Location
Stockholm, Sweden
Toptal Member Since
July 31, 2014
Justus started as a full-stack developer in 2008 and has been the software architect for a leading real-estate firm since 2016. He has 14+ years of experience developing software using .NET, .NET Core, Node.js, React, etc. Justus is well versed in microservice architecture and has developed state-of-the-art DevOps pipelines using Docker and Kubernetes. Justus communicates very well, is detail-oriented, and delivers top-quality consistently.
Portfolio
Leadhome
Kubernetes, React, Node.js, .NET Core
Psypher
WordPress, PHP, AngularJS
Bondspark
.NET Core, PostgreSQL, React
Experience
Availability
Part-time
Preferred Environment
Amazon Web Services (AWS), Kubernetes, React, Node.js, .NET Core
The most amazing...
...thing I've developed is a microservice stack with a GitOps build pipeline, RabbitMQ inter-service communication, and Kubernetes hosting on AWS.
Work Experience
Software Architect
2016 - 2021
Leadhome
- Built a GitOps build pipeline, orchestrating staging and production environments on a Kubernetes cluster hosted on AWS EKS.
- Created a buyer leads service using .NET Core, PostgreSQL, Redis, and Hangfire. This service contains a weighted assignment engine and a lead-scoring mechanism.
- Developed a GraphQL gateway service that aggregates data from many underlying microservices and performs authentication and authorization using JWT.
- Programmed a global search service, aggregating data from many underlying microservices, that provides lightning-fast and applicable search results using Elasticsearch.
- Constructed a custom CRM using React and GraphQL, used by 100+ employees daily. This includes the management of contacts, companies, events, leads, listings, and much more.
- Built many NuGet and npm libraries, used on many services to provide functionality like RabbitMQ communication, consistent request, error logging, and React components.
- Created much of what you see at Leadhome.co.za using React, Redux, and Node.js. This property portal allows you to book viewings for properties and much more.
- Developed a React component library used by the micro UIs that make up the CRM interface, including everything from buttons to reusable forms and data providers.
- Managed a team of three developers to deliver a few lead-focused services used by the CRM.
Technologies: Kubernetes, React, Node.js, .NET Core
CTO, Founder
2014 - 2021
Psypher
- Coached and managed developers and designers in the process of developing software.
- Developed the company website using AngularJS, PHP, and WordPress.
- Built a variety of client websites, listed on Psypher.co.za.
- Created a client website development starting kit to kickstart projects.
Technologies: WordPress, PHP, AngularJS
Software Developer
2019 - 2020
Bondspark
- Developed the website that can be seen at https://bondspark.co.za.
- Built an affordability calculator allowing the user to calculate their estimated home loan amount and total repayment, considering interest rate and more.
- Built a repayment calculator that allows the user to calculate the monthly repayment of a bond.
Technologies: .NET Core, PostgreSQL, React
Senior Full-stack Web Developer
2014 - 2016
FanAngel
- Developed an SPA Web UI using AngularJS and TypeScript.
- Collaborated in the development of a REST JSON API, using PHP and Laravel.
- Developed distribution compilation and packaging scripts for easy deployment.
- Sliced and applied PSD designs with HTML5, CSS3, and Bootstrap to create a responsive user interface.
- Integrated UI libraries like JWPlayer, Markdown, MomentJS, and Velocity to create a rich and cutting-edge experience.
- Hosted using AWS Elastic Beanstalk.
Technologies: MySQL, Laravel, PHP, AngularJS, TypeScript
Senior Full-stack Web Developer
2015 - 2015
Anza Flooring
- Designed and developed a custom WordPress theme using Photoshop, HTML5, CSS3, and Bootstrap.
- Developed a photo library using custom post types and custom page templates.
Technologies: WordPress, JavaScript, CSS3, HTML5
Senior Web Developer
2015 - 2015
Christ Gen
- Designed a minimalist and modern website using Photoshop.
- Sliced PSD designs using HTML, CSS, and Bootstrap.
- Developed custom WordPress themes, using custom post types and custom page templates.
Technologies: WordPress, PHP, CSS3, HTML5
Web Developer
2014 - 2014
Context A3
- Created a mobile site used for onsite social sharing of campaigns and events.
- Integrated with Twitter, Facebook, and Bitly to enable social sharing.
- Developed a metrics service that updates regularly, collecting the social interactions on posts made via the mobile site.
- Built a responsive desktop site and admin area for campaign management.
- Wrote an ASP.NET Web API serving data to two Angular sites.
- Created a performance page with graphs using D3 showing the metrics data collected.
- Set up hosting on Azure websites and cloud services.
Technologies: Azure, TypeScript, Less, Bootstrap, D3.js, Angular, JavaScript, CSS, HTML, ASP.NET
Web Developer
2014 - 2014
TurboRoster
- Created a calendar similar to Google Calendar used to schedule and review the roster of fitness classes offered.
Technologies: AngularJS, JavaScript, CSS, HTML, ASP.NET
Senior Software Developer
2013 - 2014
MiX Telematics
- Developed a fleet management web application called DynaMiX, which is used for vehicle position and event tracking by large corporations including Parmalat, Shell, the Belgian police force, and more.
- Created an info hub component with a TweetDeck-like user experience for the management of events, jobs, and messages.
- Built a fleet administration component enabling users to manage fleet details, servicing records and reminders, vehicle access control, mobile tracking unit configuration, and lots more.
- Programmed a hosting and operations component enabling support staff to create new client databases, manage organizational settings, and more.
- Developed unit tests to ensure product stability and minimize regression.
- Provided support for a tracking component enabling users to view current and historical trip data.
- Created a notification component enabling users to create custom notifications for vehicle events.
Technologies: Microsoft SQL Server, JavaScript, HTML, AngularJS, Nancy, ASP.NET
Senior Software Developer
2013 - 2013
Global Kinetic
- Developed a WordPress plugin for use with a mobile application to enable a password-free sign-in platform.
- Created a JavaScript component to simulate websocket type behavior.
- Built a Joomla! plugin for use with a mobile application to enable a password-free sign-in platform.
- Programmed a Drupal plugin for use with a mobile application to enable a password-free sign-in platform.
Technologies: JavaScript, HTML, MySQL, PHP, Microsoft SQL Server, ASP.NET
Software Developer
2011 - 2013
New Media Labs
- Developed and supported an investment management web application for Nedgroup Investments.
- Built a custom reporting framework focusing on maintainability and lowering future development cost for Nedgroup Investments.
- Created a dashboard charting framework for visual summary reporting for Nedgroup Investments.
- Developed and managed the team for a mobile web application for Mr. Delivery.
- Built and supported a custom CMS solution.
- Created unit and integration testing framework to ensure product stability and detect regression.
- Integrated with data warehouse web services for use on reporting pages.
Technologies: MySQL, PHP, Microsoft SQL Server, JavaScript, HTML, ASP.NET
Senior Web Developer
2011 - 2012
StudioSOKO
- Developed an online shop for the sale of various items such as maternity wear, home decorations, gifts, and more.
- Built a seller shop front component allowing users to register as sellers and sell their own homemade items online.
- Created an administration component for overseeing transactions and new seller registrations.
- Programmed a shopping cart component to allow buyers to add items to their cart, specify product options, and pay by credit card.
- Wrote a category search and menu component to create a better user experience when looking for products.
Technologies: CodeIgniter, JavaScript, HTML, MySQL, PHP
Web Developer
2011 - 2011
Hello Computer
- Developed the main and mobile websites for Colgate toothpaste.
- Built a 360° view component for use on the Tutch Card website.
- Provided support and developed extensions for the main site of Huggies diapers.
- Created a RESTful PHP API enabling persistence for Flash games for Castle Light Beer.
- Supported the main company website.
Technologies: Adobe Photoshop, JavaScript, HTML, PHP
Software Developer
2008 - 2011
New Horizons
- Supported and developed a custom CRM system used to manage students, courses, and company finances.
- Traveled across the country to present lectures on various development technologies including .NET, PHP, Java EE, JavaScript, and more.
- Built a replacement CRM system while focusing on maintainability and future expansion.
- Developed and optimized reports to reduce load time and fix accuracy issues.
- Created a phone call recording system allowing sales consultants to capture phone conversations for future reference.
Technologies: PHP, JavaScript, HTML, Microsoft SQL Server, ASP.NET
Experience
Leadhome
https://www.leadhome.co.zaTurning the real estate industry on its head, Leadhome is the first agency in SA to use amazing tech and automation to make the process of buying and selling affordable.
The tech consists of multiple layers of magic. In the front sits a next-gen fully isomorphic React + Redux website. This is served by a .NET API abstracting away integration with a PostgreSQL DB, Salesforce, and a few data providers. The website also consumes a REST API from a custom WordPress instance serving as an amazing content management platform.
All of this is hosted on AWS and published with a full continuous integration system.
The tech consists of multiple layers of magic. In the front sits a next-gen fully isomorphic React + Redux website. This is served by a .NET API abstracting away integration with a PostgreSQL DB, Salesforce, and a few data providers. The website also consumes a REST API from a custom WordPress instance serving as an amazing content management platform.
All of this is hosted on AWS and published with a full continuous integration system.
Bondspark
https://bondspark.co.zaBondspark specializes in bond origination and integrates with all major home loan providers in South Africa. Providing a fully online application process and world class support, Bondspark is leading the way in South Africa as one of the most anticipated fintech companies.
FanAngel
http://fanangel.comFanAngel is a crowdfunding platform that allows the user to make donations or pledges towards a team or player's preferred charity based on their performance on the field.
FanAngel is an AngularJS UI consuming a PHP and Laravel JSON API.
FanAngel is an AngularJS UI consuming a PHP and Laravel JSON API.
Psypher Website
Website for my personal company, Psypher. AngularJS UI with WordPress JSON API.
DynaMiX by MiX Telematics International
http://www.mixtelematics.comMiX Telematics are the international leaders in fleet management and telematics solutions. DynaMiX is the latest in fleet management solutions, using cutting-edge technologies and built by some of the best in the industry.
Nedgroup Investements
http://www.nedgroupinvestments.co.zaNedgroup Investments is one of South Africa’s leading investment management companies. Nedgroup Investments is a division of Nedbank Group, Ltd, a large and stable financial services group, and provides both local and offshore investment management services.
Expensetracker.co.za
Expensetracker.co.za is a simple yet powerful expense tracking web application. It uses the latest and greatest technologies making it super sleek and performant.
All the code can be found https://github.com/justusburger/expensetracker for technical review purposes.
All the code can be found https://github.com/justusburger/expensetracker for technical review purposes.
iWomp
A social sharing platform enabling users to share messages to their social channels on good deals or awesome products.
Skills
Languages
C#, HTML5, JavaScript, CSS3, GraphQL, SQL, PHP, HTML, CSS, Less, TypeScript, Python
Frameworks
Redux, ASP.NET, .NET Core, Cypress, CodeIgniter, Nancy, AngularJS, Angular, Bootstrap, Laravel
Libraries/APIs
React, Node.js, Moq, LINQ, D3.js
Tools
Babel, Webpack, Grunt, WebStorm, RabbitMQ, Adobe Photoshop, Figma
Paradigms
Test Automation, Unit Testing, Test-driven Development (TDD), Agile Software Development
Platforms
MacOS, WordPress, Kubernetes, Docker, Amazon Web Services (AWS), Linux, Azure
Other
Freelancing, GitOps, Apollo, Domain-driven Design (DDD)
Storage
MySQL, Microsoft SQL Server, Elasticsearch, Redis, PostgreSQL
Education
2008 - 2011
Microsoft Certified Software Developer's Degree in Distributed Software Development
Microsoft - Washington
2008 - 2011
Technical Degree in Software Engineering
New Horizons - Cape Town, South Africa
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