Description

I help teams build, secure, and scale web platforms that stay fast and maintainable. With over 10 years of experience in Ruby on Rails and React, I deliver APIs, dashboards, and backend systems that are observable, testable, and production-ready.

Clients hire me to improve reliability, reduce deployment friction, and ship features safely in regulated or high-traffic environments. I focus on clear ownership, strong monitoring, and designs that evolve without chaos.

You can expect well-structured Rails services, React interfaces that perform across devices, and DevOps workflows using Docker and AWS ECS. My work blends engineering discipline with practical delivery: measurable uptime, secure integrations, and code teams can trust.

Languages

Romanian
Native or bilingual
English
Fluent
German
Conversational
Hungarian
Conversational

Workplace preferences

Can work on-site

Cluj-Napoca (up to 50km)

Transcenda,
Senior Software Engineer
November 2024 - May 2025 (6 months)
Poland
• Built and optimized Rails 7 microservices and React features for patient management to support a platform with >10M study participants.
• Delivered compliant services on Docker and AWS ECS to speed deployments in a regulated environment.
• Implemented Unleash feature flags, Sumo Logic observability, and Canva design tokens to speed safe releases and keep the UI consistent.
• Developed a mobile-optimized UI with Web Components, Shadow DOM, and container queries to improve responsiveness across devices.
• Stack: Ruby on Rails 7, React, TypeScript, Docker, AWS ECS, Unleash, Sumo Logic, Artifactory.
Ruby on Rails Microservices React.js SOA PostgreSQL
OnTheGoSystems,
Senior Software Engineer
December 2023 - September 2024 (9 months)
Hong Kong
• Parallelized asynchronous jobs to cut translation processing time from tens of minutes to under 1 minute.
• Built and maintained product features in Rails, React, and Redux to expand the core platform.
• Hardened APIs with security best practices to reduce exposure to common vulnerabilities.
• Integrated OpenAI for rewrites and DeepL for machine translation to improve quality and reduce manual edits.
• Evaluated a fine-tuned RoBERTa NER model to validate entity extraction quality; ran parser conformance suites and shipped a glossary workflow.
• Stack: Ruby on Rails, React, Redux, Docker, AWS ECS, OpenAI API, DeepL.
Python Tech Lead
Cobalt Inc,
Application Security Engineer & Pentester
November 2019 - Today (6 years and 7 months)
United States
• Performed pentests and secure code reviews across Rails, Node.js, Python, and React and delivered remediation aligned with OWASP ASVS.
• Test authentication, access control, rate limiting, input validation, session management and data security using ZAP, Burp Suite, and Postman.
• Delivered security assessments and reports across authentication and SSO, access control and IDOR; data exposure and error handling; HTTP security headers and TLS; dependency risks; file and path handling and injection/unsafe reflection.
IT-Security