Andrei Olar, Developer in Cluj-Napoca, Romania
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Andrei Olar

Verified Expert  in Engineering

Technical Leadership Developer

Cluj-Napoca, Romania
Toptal Member Since
January 15, 2019

Andrei is an inquisitive person, an avid learner, and a team player. Drawn primarily toward craftsmanship and architecture, he's worked with many technologies and teams of all sizes over the past two decades. He's a polyglot programmer, a clean coder, and an agile tech lead that puts trust and mutual respect above all else.


Python 3, Node.js, Docker, Kubernetes, APIs, Technical Leadership, MacOS, Go...
Amazon Web Services (AWS), Kubernetes, Docker, Apache Kafka, RabbitMQ, REST...
RabbitMQ, Node.js, Webpack, Vue, RequireJS, React, .NET, ASP.NET MVC...




Preferred Environment

Continuous Integration (CI), Git, Visual Studio Code (VS Code), Jira, MacOS, JetBrains, Continuous Delivery (CD), GitLab, Atlassian

The most amazing... I've designed in an IDE which allowed engineering medical tests of any complexity for any medical device.

Work Experience

Principal Engineer

2021 - PRESENT
  • Mentored developers within the organization interested in individual contributor roles.
  • Contributed to the development of the company's technology strategy.
  • Evaluated growth opportunities and identified the potential technology fit.
Technologies: Python 3, Node.js, Docker, Kubernetes, APIs, Technical Leadership, MacOS, Go, PyCharm, Continuous Integration (CI), Kanban, Extreme Programming, Design Patterns, Test-driven Development (TDD), Python

Software Architect

2019 - 2021
  • Led the technical development of the ComplyAdvantage screening application.
  • Promoted DevOps culture within the organization through practices such as JIT delivery or IaC.
  • Oversaw the company's key result implementation and mediated conversations with key stakeholders within and outside the company.
  • Implemented automated architectural governance principles to ensure a higher delivery standard and effortless standardization.
Technologies: Amazon Web Services (AWS), Kubernetes, Docker, Apache Kafka, RabbitMQ, REST, Flask, Python, Technical Leadership, GitLab, MacOS, Go, Helm, PyCharm, Flask-RESTful, Continuous Integration (CI), Kanban, Extreme Programming, Design Patterns, Test-driven Development (TDD)

Software Developer | Agile Coach

2016 - 2018
  • Created and maintained websites as a full-stack developer using the Microsoft .NET stack and a proprietary front-end platform based on CanJS.
  • Ported projects from older technologies such as ASP.NET Web Forms to newer ones such as ASP.NET Core and Vue.js.
  • Integrated websites with the Stripe API to facilitate payments.
  • Optimized team and project workflows by promoting and implementing best practices such as continuous integration, code reviews, test-driven development, and Kanban or team retrospectives.
  • Drove Git adoption over TF version control and tutored colleagues that were new to decentralized version control systems.
  • Improved deployment automation using Nexus, Puppet, Powershell, Octopus Deploy, Visual Studio Team Services/TFS, or TeamCity.
  • Mentored colleagues who sought to write higher-quality code based on sound architectural principles.
  • Mentored student interns during summer internships.
Technologies: RabbitMQ, Node.js, Webpack, Vue, RequireJS, React, .NET, ASP.NET MVC, ASP.NET Web Forms, ASP.NET Web API, ASP.NET Core, Technical Leadership, ASP.NET Core 2, Continuous Integration (CI), Kanban, Object-oriented Design (OOD), Extreme Programming, Inversion of Control, Design Patterns, PMI Agile Certified Practitioner (PMI-ACP), Test-driven Development (TDD)

Mobile Application Software Architect

2015 - 2016
Intel Corporation
  • Developed a Windows eBook reader with WPF while working part-time on the same product on other platforms (Android and iOS) using Xamarin.
  • Organized CI/CD pipelines for desktop and mobile applications using Atlassian tooling.
  • Improved best practices like code reviews or pair programming.
  • Designed and implemented single sign-on experiences for desktop and mobile applications using providers from the education sector such as Clever.
  • Implemented a decentralized content distribution network proof of concept using Node.js.
Technologies: Confluence, Bamboo, Crucible, Jira, Express.js, Node.js, Windows Presentation Foundation (WPF), Xamarin, .NET, Technical Leadership, MacOS, GRASP, Continuous Integration (CI), Kanban, Object-oriented Design (OOD), Extreme Programming, Inversion of Control, Design Patterns, PMI Agile Certified Practitioner (PMI-ACP), Test-driven Development (TDD)

Software Developer and Foreman

2014 - 2015
  • Developed extensions for the company's financial trading platform.
  • Wrote profit and loss projection algorithms for optimizing financial outcomes of trading operations.
  • Implemented data monitoring of UI components for high traffic data sources.
  • Regulated quality standards for the company's codebase.
  • Organized workshops focusing on the continuous improvement of legacy code.
Technologies: Windows Presentation Foundation (WPF), Windows Forms (WinForms), Rx, .NET, XML-RPC, Apache Felix (OSGI), Java SE, Technical Leadership, PyCharm, GRASP, Aspect-oriented Programming, Continuous Integration (CI), Kanban, Object-oriented Design (OOD), Extreme Programming, Inversion of Control, Design Patterns, Test-driven Development (TDD)

Software Developer | Technical Lead

2010 - 2014
iQuest Group
  • Designed and implemented an environment for engineering medical tests.
  • Coached team members on Agile methodologies in general and eXtreme Programming (XP) specifically.
  • Introduced continuous integration, test-driven development, automated UI testing, and implemented code reviews as core practices on the project.
  • Created a component toolkit for dynamically creating UIs with an emphasis on memory optimization and code reuse.
  • Created a test framework using NUnit and C#, which allowed reliably testing UI components produced via XAML compilation at a time when such frameworks were in their infancy and still unreliable.
Technologies: Windows Communication Foundation (WCF), .NET, Windows Phone, XAML, Windows Presentation Foundation (WPF), C#, Technical Leadership, GitLab, GRASP, Aspect-oriented Programming, Continuous Integration (CI), Kanban, Object-oriented Design (OOD), Extreme Programming, Inversion of Control, Design Patterns, Test-driven Development (TDD)

Software Developer

2005 - 2010
  • Implemented a provider for ADO.NET, which allowed the execution of SQL 92 queries originating on .NET Compact compatible mobile devices on any SQL server, such as MySQL, MS SQL Server, PostgreSQL.
  • Created a tool for testing websites similar to Selenium using Delphi 7, COM+, and ActiveX.
  • Developed a warehouse management system for the fashion industry. The technologies used were ASP, VBScript, SQL, .NET Compact, and the .NET Framework.
  • Created a data exchange middleware platform for data representable as text. It had an exchange server, an administration application, and tools for securing communication with third-party systems via secure Shell tunnels.
  • Built a component library for Windows Forms applications which allowed creating dynamic user interfaces based on data inference and templates.
  • Developed sets of reusable components for writing mobile apps on top of Windows CE, PocketPC, or Windows Mobile using the .NET Compact framework.
Technologies: SQL, Mobile, Windows CE, .NET, .NET Compact, C++, Java SE, ASP.NET, Active Server Pages (ASP), VBScript, JavaScript, C#, Delphi, GRASP, Object-oriented Design (OOD), Extreme Programming, Design Patterns

Software Developer

1997 - 2005
  • Implemented custom software based on requirements in the accounting and bookkeeping sector.
  • Created a word processor with rich text capabilities.
  • Designed, implemented, and maintained a scoring application for the game of bridge.
  • Developed a type of chat software to be used in an intranet.
  • Implemented a cruise control module able to control both the acceleration and the speed of a car.
Technologies: Java, SQL, ActiveX, COM+, Delphi, ASP.NET Core 2, Aspect-oriented Programming, Continuous Integration (CI), Kanban, Object-oriented Design (OOD), Extreme Programming, Design Patterns, Inversion of Control, Test-driven Development (TDD)

Intel Education Study App

This was part of a complex platform designed for reading eBooks that eased studying. It was available on all relevant platforms at the time.

The original premise was to take hard-copied books, convert them to a digital format, and then enhance the lecture by adding various tools for studying.

• Embedded videos, images, thesaurus, and dictionary lookup
• Flashcards
• A journal that would allow the viewing and printing of a summary of the material
• An ability to share notes, journal entries, and other user-generated content with others
• Digital rights management for the content publishers
• A single sign-on that uses external providers such as Clever ( to allow easier integration into a school/classroom environment is a travel review website geared towards the Dutch market peaking at over two million unique visitors on a monthly basis. Our team was responsible for the maintenance and overhaul of the back end of this website.

Warehouse Management System

Contributed to developing a customized warehouse management system for the fashion industry.

• Monitors incoming and outgoing merchandise
• Manages various packaging options for the merchandise
• Anti-theft protocols in place
• Implements contingency measures in case of damage or various other problems with the goods
• Offers near real-time reports on stock or projected space availability
• Provides readily available topographical information of the warehouse
• Offers role-based access to its functionality

While most warehouse management systems of the time were exclusively desktop-based, this system innovated by offering a mobile application. This drastically improved all activities related to keeping stock properly. The mobile application was in part native and web-based, reflecting what would become one of the main industry trends.

Another innovative aspect was integrating the warehouse's own automation features into the application.

Code Retreat Organizer and Facilitator
Organized code retreats seeking to engage with others in the beauty of simple design. As a facilitator for these events, I make sure the participants' needs are taken care of and their experience during the event is a rewarding one. I also guide them through advanced test-driven development and pair programming techniques, all the while making sure everyone sticks to the event's format.

Development Environment for Medical Tests

This project was a complex tool for the pharmaceutical industry. Some call it an environment for engineering medical tests, while others refer to it as a core repository of knowledge.

• A pluggable architecture that enables engineering on any medical test for any device
• Dynamic UI generation based on user input and data inference
• A core repository for storing data in a versioned, consistent way
• An advanced knowledge repository for browsing and search algorithms
• Workflows for releasing new tests to production devices worldwide
• Automatic documentation generation
• Semantic differentiation between versions of the same test

Profit and Loss Extension for High-touch Trading

High-touch solutions allow office workers from financial institutions to interact with the financial markets directly.

The project was an extension built on top of an existing platform.

• Monitor profit and loss statistics in near real time on transactions from multiple sources (various markets, registered in an order management system, and so on)
• The ability to act quickly to ensure the best course of action is taken at a given moment
• Keep an updated log of the status of transactions as reflected by multiple data sources
2001 - 2005

Bachelor of Law (BLL) Degree in International Contract Law

Universitatea Babes-Bolyai - Cluj-Napoca, Romania

2001 - 2005

Bachelor in Computer Science (BSc) Degree in Computer Science

Universitatea Babes-Bolyai - Cluj-Napoca, Romania


AWS Certified Solutions Architect

Amazon Web Services

JUNE 2015 - JUNE 2018

Agile Certified Practioner

PMI | Project Management Institute


Financial Markets



Certified Scrum Master

Scrum Alliance


TS: Windows Applications Development with Microsoft .NET Framework 4



REST APIs, Node.js, React, Reactive Extensions, React Router, Windows Forms (WinForms), Flask-RESTful, Vue, Vuex, TFS API, Google APIs, Facebook Login, Stripe API, Jira REST API, SQLite.NET, RequireJS, SQLAlchemy, PySpark


Vim Text Editor, Microsoft Visual Studio, WebStorm, JetBrains Rider, Git, IntelliJ IDEA, Visual Studio, Crucible, RabbitMQ, TFS, Subversion (SVN), Mercurial, Atlassian, Jira, Confluence, Bamboo, TeamCity, Jenkins, GitLab CI/CD, NGINX, SuperTest,, Webpack, Webpack 4, Webpack 3, PyCharm, Helm, JetBrains, GitLab


Windows Presentation Foundation (WPF), ASP.NET Core 2, .NET, ADO.NET, Entity, Rx, Flask, ASP.NET Core, ASP.NET Web API, ASP.NET MVC, ASP.NET, Django, Redux, Django REST Framework, Apache Felix (OSGI), Express.js, Windows PowerShell, ASP.NET Web Forms, .NET Compact, NUnit, SpecFlow, ActiveX, Spark, .NET 2, .NET 4, OSGi


Extreme Programming, Model View ViewModel (MVVM), Test-driven Development (TDD), Design Patterns, Inversion of Control, Object-oriented Design (OOD), Object-oriented Programming (OOP), Kanban, Scrum, Continuous Integration (CI), Continuous Delivery (CD), Agile Software Development, REST, Gang of Four (GOF) Design Patterns, Aspect-oriented Programming, Concurrent Programming, Refactoring, Reactive Programming, Functional Programming, Agile Project Management, E2E Testing, Unit Testing, Behavior-driven Development (BDD), COM+, GRASP, Parallel Programming, Agile, Hosting


C#, XAML, JavaScript, SQL, Python 3, T-SQL (Transact-SQL), Python, Java SE, Delphi, Active Server Pages (ASP), C++, CSS, Kotlin, XML, Delphi 7, Bash, Java, VBScript, Go, Visual Basic


MySQL, Microsoft SQL Server, Redis, MongoDB, PostgreSQL, XML-RPC, Elasticsearch, SQL Server 2016, SQL Server 2012


Universal Windows Platform (UWP), Visual Studio Code (VS Code), Docker, Kubernetes, Windows Phone, Windows CE, Mobile, Amazon Web Services (AWS), Android, Xamarin, Java SE 6, Linux, Slackware, Apache2, OS X, Apache Kafka, Apache Flink, MacOS, iOS


SOLID Principles, System Architecture, Software Design, Software Architecture, Technical Leadership, PMI Agile Certified Practitioner (PMI-ACP), APIs, Component Libraries, Argo CD, Jira Administrator, Scrum Master, Windows Communication Foundation (WCF), Xamarin.Forms, SSH, TFS Administration, TFS Customization, A/B Testing, Project Lombok, DCOM, Dynamic Data Exchange (DDE), Agile Delivery, Code Review, Facilitation, Coaching, AWS Certified Solution Architect

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