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Hands-on problem solving and calm execution are priorities for me from day one. With over 10 years’ experience, I have defined, shipped, tested, and operated web and data products end to end. I focus on APIs with clear ownership and SLOs, fast incident recovery, and observability that makes issues obvious. I partner with product, support, and vendors to untangle cross-service problems, then turn incidents into better tests, alerts, and docs. Security stays simple and visible: gradual rollouts so teams move fast without surprises. I scale architecture with sensible patterns such as modular monoliths and domain-driven design.…Hands-on problem solving and calm execution are priorities for me from day one. With over 10 years’ experience, I have defined, shipped, tested, and operated web and data products end to end. I focus on APIs with clear ownership and SLOs, fast incident recovery, and observability that makes issues obvious. I partner with product, support, and vendors to untangle cross-service problems, then turn incidents into better tests, alerts, and docs. Security stays simple and visible: gradual rollouts so teams move fast without surprises. I scale architecture with sensible patterns such as modular monoliths and domain-driven design.

Mircea Mare

Developer, Full Stack Developer, AI Engineer

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Hands-on problem solving and calm execution are priorities for me from day one. With over 10 years’ experience, I have defined, shipped, tested, and operated web and data products end to end. I focus on APIs with clear ownership and SLOs, fast incident recovery, and observability that makes issues obvious. I partner with product, support, and vendors to untangle cross-service problems, then turn incidents into better tests, alerts, and docs. Security stays simple and visible: gradual rollouts so teams move fast without surprises. I scale architecture with sensible patterns such as modular monoliths and domain-driven design.…Hands-on problem solving and calm execution are priorities for me from day one. With over 10 years’ experience, I have defined, shipped, tested, and operated web and data products end to end. I focus on APIs with clear ownership and SLOs, fast incident recovery, and observability that makes issues obvious. I partner with product, support, and vendors to untangle cross-service problems, then turn incidents into better tests, alerts, and docs. Security stays simple and visible: gradual rollouts so teams move fast without surprises. I scale architecture with sensible patterns such as modular monoliths and domain-driven design.

Available to hire

Hands-on problem solving and calm execution are priorities for me from day one. With over 10 years’ experience, I have defined, shipped, tested, and operated web and data products end to end. I focus on APIs with clear ownership and SLOs, fast incident recovery, and observability that makes issues obvious.

I partner with product, support, and vendors to untangle cross-service problems, then turn incidents into better tests, alerts, and docs. Security stays simple and visible: gradual rollouts so teams move fast without surprises. I scale architecture with sensible patterns such as modular monoliths and domain-driven design.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Romanian, Moldavian, Moldovan

Fluent

English

Fluent

German

Intermediate

Hungarian

Beginner

Work Experience

Senior Software Engineer (Rails / React) at Transcenda, Poland (remote, contract)

May 1, 2025 - August 26, 2025

Built and optimized Rails 7 microservices and React features for patient management to support a platform with over 10 million 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 Canvas 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.

Senior Software Engineer (Rails / React) at OnTheGoSystems, Hong Kong (remote, contract)

September 1, 2024 - August 26, 2025

Parallelized asynchronous jobs to cut translation processing time from tens of minutes to under one 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.

Application Security Engineer & Pentester at Cobalt Inc, USA (remote, project-based)

November 1, 2019 - Present

Performed pentests and secure code reviews across Rails, Node.js, Python, and React and delivered remediation aligned with OWASP ASVS. Tested 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.

Full-Stack Software Engineer at Camera Guide, Sibiu, Romania (remote, employment)

December 1, 2020 - August 26, 2025

Built and operated a recommendation engine end-to-end on AWS; added Amazon API import, ratings, and a selection wizard to improve catalog coverage and UX.

Full-Stack Software Engineer at Aissac SRL, Cluj, Romania (on-site)

September 1, 2018 - August 26, 2025

Built an accounts receivable automation platform (Rails and JavaScript) to deliver invoice insights for SMEs. Developed an ETL pipeline from historical invoicing data to generate reports used for lead generation, producing hundreds of prospects. Audited and fixed billing defects across invoicing applications and an online course platform (10k-50k users), strengthened tests, and upgraded stacks (Ruby 1.8 to 2.*, Rails 3.2 to 5) adding OAuth 2.0, impersonation, and API access control.

C/C++ Software Engineer (CAD/FEA) at Fortech SRL, Cluj, Romania (on-site)

May 1, 2013 - August 26, 2025

Implemented features for complex CAD geometries and large finite element models to meet client requirements. Migrated Fortran components to C++ (STL, Qt, Boost) to modernize the graphics engine and enable plugin integration.