Resume - Marius Bakelis

Professional Summary

Software architect and hands-on developer with 28 years of continuous experience building large-scale engineering software for the construction industry. Architect in the product sense: designs how all parts of a product work together as one system - desktop application, calculation engines, API endpoints, web frontend, and backend services - and still writes production code daily. Deep expertise in C/C++ systems programming, complemented by modern web development with React.js and PHP. Led architecture for a flagship application used daily by thousands of structural engineers across Europe; currently leading the modernization of a 30+ year C++ codebase into a scalable cloud-native web platform. Works with AI coding agents daily and led the team's adoption of agentic development workflows. Looking to apply this experience in a Lithuanian product company.

Technical Skills

Languages	C, C++, C#, PHP, JS/TS
Frontend	React.js, HTML/CSS
Desktop GUI	wxWidgets, MFC/Win GUI (Windows desktop applications)
Backend	PHP (with custom C++ extensions), Node.js, Next.js, MySQL, WAMP/LAMP
Architecture	Whole-product architecture: desktop app, calculation engines, API endpoints, web frontend, and backend services designed as one system; cross-technology integration, modular design, legacy-to-cloud migration
Tools & Platforms	Visual Studio, Visual Studio Code, Cursor, GitHub Copilot, Git, Docker, Linux (Ubuntu)

AI-Augmented Engineering

Agentic AI workflows - daily development with AI coding agents and assistants: planning complex changes with an AI agent, delegating multi-step implementation tasks, reviewing and steering agent output
Context and prompt engineering - writing specs, rules, and project conventions that make AI tools productive on a large legacy codebase
AI-assisted code review and refactoring - including legacy-code comprehension across a 30+ year C++ codebase
Architecture exploration and research - using AI to compare design options, produce documentation, and investigate unfamiliar technology, always verifying output before it ships
Team AI adoption - introduced AI-assisted development to the team as Team Lead, set quality and review standards for AI-generated code

Work Experience

Software Development Team Lead / Architect / Developer January 2024 - Present

Matrix Software / StruSoft (StruSoft Group) - Vilnius, Lithuania

Leading architecture and development of a new scalable web platform to bring Matrix Software's engineering tools to the browser.

Architecting a multi-application React.js frontend with shared component libraries and design systems
Designing a PHP backend that integrates performance-critical C++ business logic as native PHP extensions
Ensuring the shared C++ core framework serves both the legacy desktop application and the new web platform
Defining architectural standards for modularity, independent testability, and long-term maintainability
Designing external APIs for third-party application integration
Leading and mentoring the development team on architecture and best practices
Driving the team's adoption of AI-assisted development, including review standards for AI-generated code

Software System Architect / Developer January 2010 - January 2024

Matrix Software (StruSoft Group) - Vilnius, Lithuania

Owned system architecture for MatrixFrame and related engineering products, making key design decisions across the full technology stack.

Designed and maintained the core C++ framework powering structural analysis software used by thousands of engineers daily
Architected the internal forces calculation engine and results presentation layer
Built a flexible HTML-based reporting engine with PDF export capabilities
Implemented a macro/scripting language system (VBScript), later leading migration to Lua
Developed advanced Windows GUI components for complex engineering workflows
Initiated the cloud migration strategy - developing C++ modules as PHP extensions for server-side deployment
Made long-term architectural decisions ensuring maintainability of a 30+ year codebase

Senior Software Developer February 1998 - January 2010

Matrix Software (StruSoft Group) - Vilnius, Lithuania

Core C++ developer on MatrixFrame - structural analysis software compliant with Eurocode and NEN standards, used across the Netherlands, Lithuania, Israel, and beyond.

Developed calculation engines, framework components, and GUI modules in C++/Visual C++/MFC
Built foundational architecture and framework code that remains in active use today
Contributed to software adopted by technical universities including TU Delft, TU Eindhoven, VGTU Vilnius, and the Technion (Haifa)
Helped establish Matrix Software as a government-accepted standard for structural engineering in the Netherlands

Key Project Highlights

SimplexFrame / SimplexApps Suite - solutions.matrix-software.biz (stage/testing)

Next-generation cloud-based engineering product suite, bringing structural analysis and design tools to the browser. Built as a collection of React.js single-page applications with a shared component library and design system on the frontend, powered by high-performance C++ calculation engines running server-side as native PHP extensions. Designed for scalability, real-time responsiveness, and seamless migration of proven desktop calculation logic to a modern cloud-native delivery model.

MatrixFrame / MatrixTools / MatrixFloor - matrix-software.com

Flagship structural analysis desktop software suite for professional engineers. Used daily by thousands of engineers at contractors, architects, and engineering offices. Cooperated with the Dutch Government to produce nationally accepted software. Deployed at major technical universities across Europe and Israel. The C++ core framework developed for this suite now also powers the SimplexApps cloud platform.

fatalyse (Personal Project)

Side project centered on technical analysis for markets, with a light traders-community / social feel - an early-stage experiment, not a trading or order-execution platform. Included watchlists, chart-oriented workflows, tinkering with signals and studies, and simple journaling plus admin basics. Built solo: LAMP stack with targeted C++ PHP extensions where data work was heavier, JavaScript/jQuery on the client, self-hosted Ubuntu. It stayed a starting point; later industry products (TradingView-style charting and community) largely realized the fuller scope I had sketched for myself but never finished.

Education

Master’s Degree in Computer Science
Vilnius Gediminas Technical University - Vilnius, Lithuania | 1999 - 2001

Bachelor’s Degree in Computer Science
Vilnius Gediminas Technical University - Vilnius, Lithuania | 1995 - 1999

Languages

Lithuanian	Native
English	Professional working proficiency
German	Elementary
Russian	Fluent (prefer not to use)