Hi, I'm Ernestas
Experienced full-stack developer with 10+ years of building production-grade web applications and scalable systems. Proven expertise in modern JavaScript frameworks, cloud infrastructure, and DevOps practices. Self-driven problem solver with a track record of delivering complex projects from concept to deployment. Passionate about emerging technologies including blockchain, cybersecurity, and machine learning—constantly expanding my skill set through hands-on experimentation and real-world implementation.
What I do
Versatile software engineer with 10+ years of experience in developing web and mobile applications. I have a passion for learning and keeping up to date with the latest tech.
Technologies & Tools
What I Bring to the Table
⚡ Architect and deliver production-ready web and mobile applications from concept to deployment
⚡ Design scalable RESTful APIs and microservices architectures that handle thousands of requests
⚡ Transform business requirements into technical solutions through comprehensive system design
⚡ Build and optimize high-performance backend systems with modern frameworks and best practices
⚡ Engineer data pipelines and interactive dashboards that turn raw data into actionable insights
⚡ Configure and maintain cloud infrastructure with Docker, Kubernetes, and CI/CD automation
⚡ Integrate AI/ML models into production applications, bridging the gap between research and reality
⚡ Rapidly diagnose and resolve complex technical challenges under pressure
Proficiency
Full-Stack Development
Proficient across the entire stack—from pixel-perfect UI implementation to complex backend architectures. I excel at turning Figma designs and wireframes into production-ready applications with clean, maintainable code.
Backend & APIs
Deep expertise in building scalable server-side systems. From RESTful APIs to real-time WebSocket services, I design architectures that are performant, secure, and maintainable at scale.
DevOps & Infrastructure
Hands-on experience with Linux administration, Docker containerization, and Kubernetes orchestration. I maintain a sophisticated homelab running multi-node clusters, giving me real-world ops experience beyond theory.
Security-First Mindset
Trained through competitive CTF challenges and security research. I write code with security baked in from the start, understanding both defensive measures and potential attack vectors.
Cloud & Automation
AWS certified with practical experience deploying and managing cloud infrastructure. I automate repetitive tasks and create efficient CI/CD pipelines that accelerate development cycles.
AI/ML Integration
Practical experience implementing machine learning models in production environments. I bridge the gap between data science and software engineering, making AI solutions accessible and scalable.
My Journey
From curious beginner to seasoned developer. A decade of building, breaking, and mastering technology.
The Spark
Discovered my passion for technology
"Started experimenting with code, broke things, fixed them, and realized this was more than a hobby—it was my calling."
Foundation Years
Junior Freelance Developer
"Dove headfirst into client work, learning by doing. Every project taught me something new about development, clients, and delivery."
Expanding Horizons
Broadening the Stack
"Ventured into cybersecurity, participated in CTFs, and built my first homelab. Started exploring blockchain and emerging technologies."
Professional Validation
Earning Industry Recognition
"While continuing freelance work, formalized knowledge through structured learning and earned industry-recognized certifications."
Corporate Experience
Full-Stack Developer @ Profitus
"Applied skills in fast-paced FinTech startup, working on payment processing platform with modern tech stack."
Architecting Solutions
Senior Software Engineer
"Leading full project lifecycles, designing complex systems, and solving sophisticated problems across multiple domains."
Continuous Evolution
Never Stop Learning, Never Stop Building
"Running a sophisticated homelab with Kubernetes clusters, contributing to open source, exploring AI/ML, and pushing boundaries every day."
The Spark
Discovered my passion for technology
"Started experimenting with code, broke things, fixed them, and realized this was more than a hobby—it was my calling."
Key Milestones:
- Wrote first lines of code
- Built first functional website
- Fell in love with problem-solving
- Decided to pursue development full-time
Foundation Years
Junior Freelance Developer
"Dove headfirst into client work, learning by doing. Every project taught me something new about development, clients, and delivery."
Key Milestones:
- Launched first client projects
- Mastered full-stack development
- Learned client communication & project management
- Built web & mobile applications
- Created workflow automation scripts
Expanding Horizons
Broadening the Stack
"Ventured into cybersecurity, participated in CTFs, and built my first homelab. Started exploring blockchain and emerging technologies."
Key Milestones:
- Competed in CTF challenges
- Built personal homelab infrastructure
- Explored blockchain & smart contracts
- Implemented cybersecurity best practices
- Deployed first Docker containers
Professional Validation
Earning Industry Recognition
"While continuing freelance work, formalized knowledge through structured learning and earned industry-recognized certifications."
Key Milestones:
- AWS Cloud Practitioner certified
- Mastered Python automation
- Completed data analytics training
- Expanded DevOps knowledge
- Continued delivering client projects
Corporate Experience
Full-Stack Developer @ Profitus
"Applied skills in fast-paced FinTech startup, working on payment processing platform with modern tech stack."
Key Milestones:
- Maintained production FinTech platform
- Contributed to cloud-native architecture
- Collaborated in agile team environment
- Optimized MySQL databases at scale
- Built features with React & modern JS
Architecting Solutions
Senior Software Engineer
"Leading full project lifecycles, designing complex systems, and solving sophisticated problems across multiple domains."
Key Milestones:
- Architected enterprise software solutions
- Developed SaaS products from scratch
- Implemented ML/AI integrations
- Built ETL pipelines & analytics dashboards
- Mastered Kubernetes & container orchestration
- Contributed to open-source projects
Continuous Evolution
Never Stop Learning, Never Stop Building
"Running a sophisticated homelab with Kubernetes clusters, contributing to open source, exploring AI/ML, and pushing boundaries every day."
Key Milestones:
- Multi-server homelab infrastructure
- Kubernetes cluster management
- Active security research & CTFs
- AI/ML experimentation
- Blockchain development
- Open-source contributions
- Mentoring aspiring developers
Featured Work
A selection of impactful projects spanning web platforms, mobile apps, and open-source contributions
Featured Projects
iSearchFrom
2023SaaS platform for testing search engine ad placements from different geolocations, serving thousands of queries daily.
Tech Stack
Reivyčių Sodai
2021E-commerce website for a plant nursery business, featuring product catalog and online ordering system.
Tech Stack
Pakeliui
2022Rideshare platform connecting drivers and passengers with route matching and user management system.
Tech Stack
Active Projects
Mobile app for calculating Lithuanian salary taxes including net salary, social insurance, and income tax.
Mobile app for converting between LKS-94 and WGS-84 coordinate systems.
Enterprise & Client Work
The projects showcased above represent my publicly available work. The majority of my professional experience involves enterprise-level applications, internal tools, and custom client solutions protected under NDAs.