💾 Radu Luncasu

Foundation Engineer | Building the Core Infrastructure, Platforms & Developer Tooling That Teams Ship On

Radu Luncasu
📌Bucharest, Romania
🔗LinkedIn Profile
✉️radu.luncasu@gmail.com
🤙🏼+40723139678

Summary

Foundation engineer with 16+ years building the core systems, platform infrastructure, and developer tooling that product teams depend on. I design and ship the foundational layers—APIs, data pipelines, deployment platforms, SDKs, and shared services—so that every team above me can move faster and break less. My work sits at the intersection of system architecture and developer experience: I’ve built SaaS platforms from zero, designed multi-tenant infrastructure serving 80+ venues, created application development kits used by entire engineering orgs, and integrated AI tooling into development workflows before it was mainstream. I care deeply about reliability, clean abstractions, and making complex systems feel simple to the people who build on top of them.

Experience

Foundation Engineer / Software Architect

Rockhopper Inc.

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Bucharest, Romania
  • Architected the core platform for spreadsheet reviews, version control, and change tracking—designing the foundational data model, diffing engine, and API layer from scratch.
  • Built the infrastructure and CI/CD pipelines that took the product from prototype to Microsoft AppSource store.
  • Selected for TechStars 2023 Summer Class—one of the few apps chosen out of thousands of applicants.
  • Integrated local LLMs into the platform’s core pipeline, fine-tuning open-source models to optimize performance while keeping data on-premise for privacy compliance.

Platform Engineer / Technical Lead

Telepat.io

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Bucharest, Romania
  • Designed and built the shared backend infrastructure, API gateway, and service architecture powering Walzay.com (IT talent sourcing), Prosign (legal contract management for sports), and Bedly.com (long-term housing in Boston & NYC).
  • Created reusable backend modules and deployment templates that reduced new project bootstrap time by 60%.
  • Built the data layer, multi-tenant database schemas, and reporting infrastructure across three concurrent product lines.

Infrastructure & Platform Engineer

Multipliciti

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Bucharest, Romania
  • Designed the foundational platform architecture for a construction materials marketplace—API design, database schema, containerized services, and cloud infrastructure on AWS.
  • Established the CI/CD pipeline, Docker-based local development environment, and deployment workflow using NestJS, PostgreSQL, and AWS services.

Solutions Architect / Platform Lead

Atta Systems (formerly AB4 Systems)

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Bucharest, Romania
  • Architected the end-to-end platform for Hamangiu (legal publishing)—subscription system, content delivery pipeline, full-text search via Elasticsearch, and async processing with RabbitMQ.
  • Designed the shared backend services, authentication layer, and API contracts consumed by multiple frontend and mobile clients.
  • Built foundational infrastructure supporting React web and React Native mobile apps across multiple product lines (Yepp, Urban Air).

Senior Developer / Technical Lead

DirectVision

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Bucharest, Romania
  • Designed and built a multi-tenant SaaS platform for congress and event management—covering participant registration, scheduling, collaboration, and content delivery.
  • Architected the system to support web apps, native Android/iOS apps, Flash kiosks, and data import pipelines from a single shared foundation.
  • Platform scaled to 80+ congress venues across 2013–2014, serving as the foundational infrastructure for the company’s entire product line.
  • Optimized core database performance on MS-SQL (2005/2008/2012) and provided consulting on database architecture and query optimization.

Platform Engineer / SDK Developer

MedicaSoft LLC.

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Bucharest, Romania
  • Contributed to the VA Enterprise Health Management Platform (eHMP)—a foundational healthcare system serving the US Department of Veterans Affairs.
  • Built and maintained the Application Development Kit (ADK)—an internal SDK enabling UI developers across the org to build consistent, compliant components with Marionette/Backbone.
  • Developed core REST services using the Resource Development Kit (RDK) on Node.js/Express, establishing API patterns and middleware consumed by the entire platform.
  • Focused on foundational concerns: JavaScript prototyping patterns, async error handling, promise chains, and shared utility libraries used org-wide.

Infrastructure & IT Systems Engineer

Pcone Trading

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Constanta, Romania
  • Built and maintained IT infrastructure for small and medium businesses—servers, networks, firewalls, routers, and switches.
  • Designed and deployed on-premise server environments (Windows Server 2003, IIS, SQL Server, Exchange Server) as foundational business infrastructure.
  • Provided end-to-end IT consulting covering hardware provisioning, network architecture, and system administration.

Education

Computer Software Engineering

Titu Maiorescu University - Informatics

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Physics

Mircea cel Batran High School

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Skills

Platform & Infrastructure

System ArchitectureAPI DesignMulti-tenant SystemsMicroservicesEvent-Driven ArchitectureSaaS Platforms

Backend & Runtime

Node.jsTypeScriptExpressNestJSREST APIsPythonRabbitMQ

Cloud & DevOps

AWS (EC2, S3, Lambda, RDS, CloudFront)DockerCI/CD PipelinesVercelInfrastructure as Code

Data & Storage

PostgreSQLSQL ServerMongoDBElasticsearchRedisDatabase Optimization

Developer Tooling & DX

SDK DesignInternal ToolingCLI ToolsDeveloper WorkflowsCode Review Automation

AI & Automation

Local LLM IntegrationModel Fine-tuningPrompt EngineeringAI-Assisted DevelopmentMLXOllama

Key Achievements

Multi-Tenant SaaS Platform at Scale

Designed and built foundational SaaS infrastructure deployed across 80+ congress venues, becoming the company’s core product platform.

Internal SDK Adoption

Built the Application Development Kit (ADK) at MedicaSoft that became the standard development framework for the VA’s eHMP engineering organization.

TechStars 2023 Selection

Architected the core platform that earned selection into TechStars 2023 Summer Class—from prototype to Microsoft AppSource.

AI-First Developer Tooling

Pioneered integration of local LLMs into development workflows—building automated code review, bug triage, and prompt-engineering tooling before it was industry standard.

Languages

EnglishNative
FrenchIntermediate
ItalianAdvanced
RomanianNative

Certifications

Microsoft Certified Technology Specialist SQL 2005

Microsoft

Fundamentals of Design

Code School

JavaScript Road Trip Part 3

Code School

Git Real

Code School

blasting-off-with-bootstrap

Code School