Open to Senior Engineering Roles

Hi, I'm Igor Vilghelm

Senior Full-Stack Developer / Team Lead

Vilnius, Lithuania • 10+ Years in Production

Senior Full-Stack Developer with 10+ years of experience building large-scale web systems for energy metering and data processing.

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Full-Stack

Engineering Impact & Scale

10+ Years

Enterprise Experience

Architecting, developing & maintaining high-load web systems. In IT since 2016.

1M+

Metering Devices

Real-time automated data processing and monitoring platform.

Per-Second

Aggregation Scale

Time-series data engine from per-second to monthly resolutions.

Multi-Region

Deployments

National-scale systems across Lithuania, Latvia & Central Asia.

Profile & Background

Architecting High-Load, Mission-Critical Systems

Specializing in enterprise-scale systems where reliability, sub-second latency, and clean code are vital for operations.

Experienced in system architecture, data visualization, cloud deployment, and CI/CD automation. Led development of complex SCADA-like interfaces and backend systems working with high-volume relational databases and complex data models.

Strong focus on performance, clean architecture, and scalable systems.

Proven leadership background directing technical decisions, mentoring engineering talent, and coordinating across cross-functional infrastructure and database teams.

Key Milestones

View all 14 achievements

Delivered and deployed energy management systems across multiple regions, including Lithuania and Latvia at different operational levels, as well as national-scale implementations in Central Asia.

Built and scaled a high-load platform processing data from 1M+ metering devices and millions of data points.

Engineered a time-series data system supporting per-second to monthly aggregation levels.

Delivered high-performance data visualization (grids, charts, SCADA-like UI), ensuring smooth UX with large-scale datasets.

Selected Works

Featured Projects

All 5 Projects

AI & LLM 2026 – Present

AI Assistant Backend Service for Web Application

Backend service powering an intelligent assistant for the Web Energy Management System with local/hosted LLM integration.

Node.js Fastify Ollama +4

Mobile 2025 – Present

Mobile Energy Management System

Field engineer cross-platform mobile solution for real-time monitoring and offline data access.

React Native Expo TypeScript +3

High-Load & Web 2020 – Present

Web Energy Management System – Maintenance & Evolution

Ensuring high availability, resilience, and horizontal scaling of 24/7 mission-critical energy management infrastructure.

High-Load Oracle MariaDB +2

Core Technologies & Competencies

Full Skills Matrix

Core & Frontend

JavaScript (ES6+) TypeScript React React Native (Expo) Redux / State Management SVG-based SCADA Visualizations Web Security Hardening (CSP, CORS, Security Headers) Responsive & User-Friendly UI HTML5 / CSS3 / Tailwind

Backend & Architecture

Node.js (Fastify) PHP (Phalcon 5, modern & legacy) REST API Architecture Redis / Garnet (In-Memory Stores) Authentication Security & Session Management Application Security (OWASP ZAP, Vulnerability Remediation) High-Load Systems Real-Time Data Processing Clean Architecture & Modular Design LLM & AI Integration (Ollama, LM Studio)

Databases & Data Processing

Oracle MariaDB PostgreSQL Complex Query Optimization Stored Procedures & Functions Time-Series Data Modeling Big Data & IoT Pipelines

Interested in working together or discussing an opportunity?

Based in Vilnius, Lithuania. Available for local and international remote opportunities.

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