Über Vasileios
I’m a Senior Software Engineer and Software Architect with more than 12 years of experience building reliable, scalable, and well-structured backend systems and full-stack applications for startups, product teams, and digital agencies.
My work spans FinTech, e-commerce, health & fitness, solar energy, real estate, DevOps platforms (RPort), and restaurant tech. Across all projects, my focus is the same: clean architecture, solid engineering, clear communication, and delivering features that work in production from day one.
Although I have experience leading the architecture of full SaaS products, I remain fully hands-on. I enjoy writing high-quality code, designing robust APIs, improving performance, and helping teams build products faster and with confidence. Clients appreciate that I combine strong technical depth with an understanding of business goals, making collaboration smooth and efficient.
Technical strengths:
- Backend development & architecture (Laravel, Node.js, Go)
- API design, scalability, refactoring, performance optimization
- Databases (PostgreSQL, MySQL, MongoDB, Redis)
- Frontend with Vue / Nuxt / Inertia.js
- Microservices, deployments, CI/CD, testing, cloud environments
I’m easy to work with, dependable, and used to joining a project and adding value immediately, whether it’s implementing new features, improving a codebase, stabilizing a system, or shaping the technical direction of a product.
Whether you need support on an existing project or want help building something new, I’d be happy to discuss how I can contribute.
Griechisch
Muttersprachlich oder zweisprachig
Englisch
Verhandlungssicher
Nur remote
Führt Projekte hauptsächlich remote aus
Projekt- und Berufserfahrung
- EasybiteCPTO & Co-FounderSeptember 2025 - Heute (9 Monate)Athens, GriechenlandEasybite is a high-performance dine-in operating platform designed for modern venues, enabling real-time ordering, multi-role venue operations, and seamless customer experiences.Key Responsibilities & Achievements:
- Architecting the full backend and system design, including APIs, data models, real-time flows, internal services, and operational tooling
- Leading product strategy, engineering direction, and technical standards for cross-device venue applications
- Designing scalable infrastructure patterns, caching strategies, and multi-role operational logic for large and small venues
- Building 4 operational modes (Waiter, Kitchen, Cashier, Owner) with a unified, efficient, low-latency architecture
- Establishing engineering processes for reliability, speed, and long-term maintainability
- Driving roadmap execution, prioritization, and overall product vision
- ThreecoltsSenior Software EngineerE-COMMERCENovember 2023 - Dezember 2025 (2 Jahre und 1 Monat)London, Vereinigtes KönigreichAt Threecolts, I worked as a Senior Software Engineer across two major SaaS products, Tactical Arbitrage (flagship product) and Dataspark, while also architecting and building the company’s new unified backend for all browser extensions.Dataspark (Product Ownership):
- Rebuilt the entire Dataspark client dashboard from scratch using Laravel, Inertia.js, Vue 3, and Tailwind.
- Developed a custom cross-browser extension (Chrome + Firefox) tightly integrated with the new dashboard.
- Added structured automated tests (unit + feature), introducing testing practices that did not previously exist in the product.
Tactical Arbitrage (Flagship Product – v2 Release):- Contributed to Tactical Arbitrage v2, a major product overhaul including a full UI redesign and backend improvements.
- Optimized high-load backend processes: improved complex queries, reduced algorithmic complexity (Big O), refactored core logic using SOLID principles.
- Helped stabilize legacy components and modernize core data flows.
Unified Extension Backend (Independent Project – Architect & Builder):- Designed and built from scratch a centralized backend platform for all company browser extensions (Dataspark, ScoutX, and Tactical Arbitrage integrations).
- Implemented the entire API using Laravel 12, including a modular architecture, JWT authentication, rate limiting, permissions, and secure multi-product data routing.
- Successfully migrated all legacy extension backends into this unified platform, improving maintainability, monitoring, and scalability.
- This backend became the new single source of truth for all extension-related functionality inside Threecolts.
Across All Products:- Introduced modern engineering practices: testing culture, cleaner architecture, performance profiling.
- Collaborated with product, design, and management to accelerate delivery and reduce operational issues.
- Upgraded multiple legacy systems into stable, scalable, and modern codebases.
- MorphLead Backend EngineerGESUNDHEIT & WELLNESSApril 2025 - Oktober 2025 (6 Monate)London, Vereinigtes KönigreichMorph Fitness is a next-generation health & performance platform combining real-time biometrics, AI-driven insights, and personalized coaching. As Lead Backend Engineer, I owned the backend architecture and delivery of complex features built for scale, accuracy, and reliability.Key Responsibilities & Achievements:
- Designed and implemented the core backend architecture using Laravel 12, Filament, Docker, and MySQL, ensuring clean domain boundaries, predictable performance, and maintainable codebases.
- Built the platform’s public and internal APIs from the ground up, secure, consistent, high-performance endpoints powering mobile and web clients.
- Engineered advanced integrations with biometric and health-tech providers, including: Terra: Ingesting real-time fitness metrics, syncing wearable device data, and calculating personalized health scores. Intelliprove: Integrating facial-scanning health assessments, processing high-sensitivity biometric signals, and normalizing outputs into platform insights. Additional medical-exam delivery services (lab data pipelines), ensuring clinical-grade accuracy and reliability.
- Implemented robust data processing pipelines, transforming raw sensor data into actionable insights, with high throughput and minimal latency.
- Led backend performance improvement initiatives. Optimized SQL queries, built caching strategies, enforced API consistency, and reduced processing overhead across core workflows.
- Established development standards, CI/CD pipelines, Dockerized environments, and best practices that improved productivity and long-term maintainability.
Impact:- Delivered a high-performance, integration-heavy backend powering a modern health platform, enabling real-time insights, scalable data ingestion, medical-grade workflows, and a seamless experience for end users.
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Ausbildung und Abschlüsse
- Master of Engineering – MEng, Electrical and Computer EngineeringNational Technical University of Athens2012