Justinas Prelgauskas
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VP of Software Engineering
Vilnius, Vilnius County, Lithuania
Résumé
Jobs
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VP of Software EngineeringHostingerOct 2024 - Current (2 years 1 month)- Head of Shared ServicesHostingerSep 2023 - Oct 2024 (1 year 2 months)
- MemberLitBANMar 2021 - Sep 2023 (2 years 7 months)Lithuanian Business Angel Network (LitBAN) fosters business angel activity through communication, events, networking, syndication of deals both locally and across Europe.
- Engineering DirectorMambuMar 2021 - Jun 2023 (2 years 4 months)
- Senior Group Director, High Load and Big DataAdformJan 2019 - Mar 2021 (2 years 3 months)Main tasks and responsibilities:
● Moving to lead the Serving/High Load group, responsible for the highly loaded (200k+ http req. per second) front facing Adform platform (Lithuania + Poland + Belarus)
● Moving to lead the Big Data Platform group, responsible for data ingestion, aggregation, enrichment, machine learning models, reporting, data analytics and BI (petabyte scale) (Lithuania + Poland) - Group DirectorAdformAug 2017 - Jan 2019 (1 year 6 months)Main tasks and responsibilities:
● Responsible for several teams grouped as a “Services” group -> servicing internal Adform teams with reusable platforms and components (Identity Platform, API platform, Data Distribution Platform), business support systems (travel booking, billing automation system, parking, etc. systems)
● Setting up a new team (Data Distribution Platform) from scratch in a new location (Warsaw)
● Acting as a people manager for Team managers and senior technical staff (leads and architects) in the group
● Setting up several new teams and later forming a group (UX Foundation) in a new location (Malaysia + Lithuania + India) to support strategic Adform project. Moving to Group Director position for th - Technical Team LeaderCognizantMar 2014 - Aug 2017 (3 years 6 months)Main tasks and responsibilities:
● Building a new team in a new location from scratch
● Ensuring that architectural choices are based on best practice
● Full project and delivery responsibility for the deliveries made out of the new team in Lithuania
● HR responsibility for all team members of the team
● Transforming and adapting legacy systems to a new and modern platform
● Coaching employees of various experience levels in order to build a strong high-performing team - Senior Software DeveloperSP Capital IQApr 2013 - Mar 2014 (1 year)Main tasks and responsibilities:
Work on real-time, multithreaded, distributed OTC credit derivative price discovery system, extracting more than 5 million quotes per day.
Design and develop scalability and resiliency into one of the core components.
Propose and implement self-balancing feature to parsing server farm.
Propose new architecture for Excel Real Time Data server and implement it.
Add new financial instrument type (Credit Index Option) support to systems.
Improve processes around: Source Control, Continuous Integration, Build Automation, Versioning and Unit Testing.
Attend and support such development processes as: CI (continuous integration), TDD (test driven development), daily builds, relea - Senior .NET Software Developer / Development managerSoftDent LtdMay 2009 - Mar 2013 (3 years 11 months)Main tasks and responsibilities:
Design and develop core "openEHR" features: archetype object model, terminology web service, template object model, template compile/flattener, integration with governmental web-services, external laboratories.
Supervise development process using Scrum with Kanban and XP (extreme programming): CI (continuous integration), TDD (test driven development), pair programming, daily builds, release planning and code review.
Analyze customer requirements, structure and delegate tasks.
Manage team of.NET developers.
Train new team members.
Solve technical issues together with support, design change pl - .NET Software DeveloperSoftDent LtdMay 2006 - May 2009 (3 years 1 month)Main tasks and responsibilities:
Develop design and architecture, implement several projects: WinForms CRM solution, ASP.NET document management system with heavy use of T-SQL, Crystal Reports and Excel automation objects.
Troubleshoot network-related infrastructure and security problems: DNS, Active Directory, Exchange Server, CISCO firewall rules, SSL certificate renewal and revocation (Microsoft IIS servers), Nagios monitoring, Archipel virtualization.
Mentor junior developers.
Used technologies, tools and languages:
.NET v2.0, 3.0, 3.5, mySQL, MsSQL 2005/2008, T-SQL, - Junior Software DeveloperSoftDent LtdMay 2003 - May 2006 (3 years 1 month)Main tasks and responsibilities:
Design and implement market sales analysis software back-end (MsSQL) and front end (WinForms, Infragistics) with heavy use of T-SQL, advanced indexing (indexed views, partial indexing).
Design and implement ASP.NET knowledge testing and document management solutions.
Support and bug fixing for legacy data-access pages and MS Access database solutions.
Used technologies, tools and languages:
.NET v1.0, v1.1, ASP, ASP.NET, C#,
Education
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- Doctoral, InformaticsKaunas University of TechnologyJan 2008 - Jan 2012 (4 years 1 month)
- Master, Program System EngineeringKaunas University of TechnologyJan 2006 - Jan 2008 (2 years 1 month)
- Bachelor, InformaticsKaunas University of TechnologyJan 2002 - Jan 2006 (4 years 1 month)
Projects (professional or personal)
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Publications
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- ISymbolic Unit Testing Method EvaluationIT AprAn object of this study is testing methods, based on dynamic symbolic execution algorithms.
One of such tools using dynamic symbolic execution under the hood is Pex. Whilst authors of this tool
state that they were able to find some new bugs on an extensively tested core .NET framework
component, there has been little work demonstrating the effectiveness of this tool with real world .NET
applications in terms of code coverage. First, after analyzing related work, we provide some ideas for
further method improvement. Second, we study the results of the application of this tool on well known
open source project as well as 10 test schemes. Finally, we provide results of method study. - JGenerating Unit Tests for Floating Point Embedded Software using Compositional Dynamic Symbolic ExecutionJournal of Electronics and Electrical Engineering MayWe present a method that would integrate both: compositional dynamic symbolic execution and search-based test data generation methods to achieve better code coverage for software that largely depends on floating point computations. We have implemented our method as an extension of a well-know symbolic execution engine – PEX. Our extension implements search-based testing as an optimization technique using AVM method. We present coverage comparison for several benchmark functions.
- ISymbolic Execution Engine for .NET PlatformIVUS MaySymbolic execution is a state of the art technique that
is being used in very interesting projects to improve security,
to find bugs, and to help in debugging. A symbolic execution
engine is basically an interpreter that figures out how to follow
all paths in a program. In this work we present our symbolic
execution engine and unit test generator for .NET platform
“SYMEX”. We evaluate it against other tool that generates
test inputs randomly.