Available to hire
Hi, I’m Marcel Dumitru Ilcea, a passionate software engineer with more than nine years of experience in full-stack development, cloud infrastructure, and DevOps. I enjoy designing scalable APIs, building robust front-end experiences with React and modern frameworks, and shipping reliable software in fast-paced teams.
I’ve led migrations to microservices, implemented secure and high-availability architectures on AWS, and mentored engineers to adopt clean code, testing, and Agile practices. I’m always eager to tackle new challenges and optimize systems for performance and security.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Language
English
Fluent
Work Experience
Senior Software Engineer at Crossover
July 1, 2025 - October 13, 2025Led the architecture migration from a monolithic system to AWS-based microservices, enabling independent service scaling and reducing deployment cycles by 78%. Designed and maintained high-availability cloud infrastructure with Terraform, AWS Lambda, ECS, and RDS, improving uptime and scalability. Built and optimized CI/CD pipelines with GitHub Actions, AWS CodePipeline, and Docker, reducing rollback times by 75% and lowering release failure rates by 40%. Improved backend performance in Node.js and PostgreSQL, cutting infrastructure costs and reducing average response times from 750ms to 280ms. Developed secure, user-centered features with React, TypeScript, and REST APIs, enhancing product usability. Mentored junior and mid-level engineers, conducted code reviews, and promoted clean code across teams. Integrated observability tools such as CloudWatch and Sentry to monitor microservice health and reduce mean time to detect by 35%. Automated provisioning and deployment workflows, enabli
Senior Full-Stack Developer at Cognizant
October 1, 2021 - October 13, 2025Built and deployed React.js incentive tools, improving user experience and reducing customer support inquiries by 25%. Redesigned backend REST APIs with Node.js and Express for asynchronous processing, cutting claim processing time from 12 hours to under 3 hours. Optimized Redux state management and performance tuning, boosting dashboard responsiveness by 30%. Integrated fraud detection systems and payment APIs (Stripe, PayPal), reducing reconciliation errors by 60% and enhancing transaction security. Developed CI/CD pipelines with Jenkins and GitHub Actions, accelerating deployments and lowering rollback times. Implemented unit and integration testing with Jest and Mocha, increasing test coverage and reducing production bugs. Collaborated with QA, DevOps, Product to deliver scalable, cloud-ready apps on AWS.
Software Developer at Ropardo
February 1, 2018 - October 13, 2025Enhanced shipment tracking systems by optimizing backend logic and data validation, improving accuracy and reducing manual errors by 30%. Integrated healthcare claim processing APIs, ensuring HIPAA compliance and reducing validation errors by 20%. Improved backend performance by reducing average response times from 800ms to 350ms through SQL query optimization, indexing, and database tuning. Developed and maintained RESTful APIs for logistics and healthcare systems, enabling secure data exchange across platforms. Collaborated in Agile/Scrum sprints, performed code reviews, and implemented unit and regression testing to strengthen stability and reduce production defects. Assisted in early adoption of CI/CD pipelines with Jenkins, improving deployment automation and reducing rollback times.
Senior Software Engineer at Crossover
July 1, 2025 - October 13, 2025Led the architecture migration from monolithic to AWS-based microservices, enabling independent service scaling and reducing deployment cycles by 78%. Designed and maintained high-availability cloud infrastructure with Terraform, AWS Lambda, ECS, and RDS, improving system uptime and scalability. Built and optimized CI/CD pipelines with GitHub Actions, AWS CodePipeline, and Docker, reducing rollback times by 75% and lowering release failure rates by 40%. Improved backend performance in Node.js and PostgreSQL, cutting infrastructure costs and reducing average response times from 750ms to 280ms. Developed secure, user-centered features with React, TypeScript, and REST APIs, enhancing product usability and customer satisfaction. Mentored junior and mid-level engineers, conducted code reviews, enforced clean code principles, and promoted knowledge sharing across teams. Integrated observability tools including CloudWatch and Sentry to monitor microservice health and reduce mean-time-to-detec
Senior Full-Stack Developer at Cognizant
October 1, 2021 - October 13, 2025Built and deployed React.js incentive tools, enhancing user experience and reducing customer support inquiries by 25%. Redesigned backend REST APIs for asynchronous processing using Node.js and Express, reducing claim processing time from 12 hours to under 3 hours. Optimized Redux state management and implemented performance tuning, improving dashboard responsiveness by 30%. Integrated fraud detection systems and payment APIs (Stripe, PayPal), reducing reconciliation errors by 60% and strengthening transaction security. Developed CI/CD pipelines with Jenkins and GitHub Actions, accelerating deployments and reducing rollback times. Implemented unit and integration testing with Jest and Mocha, increasing test coverage and reducing production bugs. Collaborated with cross-functional teams (QA, DevOps, Product) to deliver scalable, cloud-ready applications on AWS. Applied clean code practices, conducted peer code reviews, and followed Agile methodologies (Scrum, Kanban).
Software Developer at Ropardo
February 1, 2018 - October 13, 2025Enhanced shipment tracking systems by optimizing backend logic and data validation, improving accuracy and reducing manual errors by 30%. Integrated healthcare claim processing APIs, ensuring HIPAA compliance, improving system interoperability, and reducing validation errors by 20%. Boosted backend performance by reducing average response times from 800ms to 350ms through SQL query optimization, indexing strategies, and database tuning. Developed and maintained RESTful APIs for logistics and healthcare systems, enabling secure and reliable data exchange across platforms. Collaborated in Agile/Scrum sprints, performing code reviews and implementing clean code practices, improving deployment quality and reducing release cycle time. Implemented unit and regression testing, strengthening system stability and reducing production defects. Worked with cross-functional teams (QA, DevOps, Product) to deliver scalable, high-availability solutions in logistics and healthcare domains. Assisted in
Senior Software Engineer at Crossover
July 1, 2025 - October 13, 2025Led the architecture migration from a monolithic system to AWS-based microservices, enabling independent service scaling and reducing deployment cycles by 78%. Designed and maintained high-availability cloud infrastructure with Terraform, AWS Lambda, ECS, and RDS, improving uptime and scalability. Built and optimized CI/CD pipelines with GitHub Actions, AWS CodePipeline, and Docker, reducing rollback times by 75% and lowering release failure rates by 40%.
Senior Full-Stack Developer at Cognizant
October 1, 2021 - October 13, 2025Built and deployed React.js incentive tools, enhancing user experience and reducing customer support inquiries by 25%. Redesigned backend REST APIs for asynchronous processing using Node.js and Express, reducing claim processing time from 12 hours to under 3 hours. Optimized Redux state management and performance tuning, improving dashboard responsiveness by 30%. Integrated fraud detection systems and payment APIs (Stripe, PayPal), reducing reconciliation errors by 60% and strengthening transaction security. Developed CI/CD pipelines with Jenkins and GitHub Actions, accelerating deployments and reducing rollback times. Implemented unit and integration testing with Jest and Mocha, increasing test coverage and reducing production bugs.
Software Developer at Ropardo
February 1, 2018 - October 13, 2025Enhanced shipment tracking systems by optimizing backend logic and data validation, improving accuracy and reducing manual errors by 30%. Integrated healthcare claim processing APIs, ensuring HIPAA compliance, improving system interoperability, and reducing validation errors by 20%. Boosted backend performance by reducing average response times from 800ms to 350ms through SQL query optimization, indexing strategies, and database tuning. Developed and maintained RESTful APIs for logistics and healthcare systems, enabling secure and reliable data exchange across platforms.
Senior Software Engineer at Crossover
November 20, 2021 - PresentLed the architecture migration from a monolithic system to AWS-based microservices, enabling independent service scaling and reducing deployment cycles. Designed and maintained high-availability cloud infrastructure using Terraform, AWS Lambda, ECS, and RDS, improving uptime and scalability. Built and optimized CI/CD pipelines with GitHub Actions, AWS CodePipeline, and Docker, reducing rollback times and improving release reliability. Improved backend performance in Node.js and PostgreSQL, cutting response times and lowering infra costs. Developed secure, user-centered features with React, TypeScript, and REST APIs, enhancing usability. Mentored junior engineers, performed code reviews, and promoted clean code and knowledge sharing. Integrated observability tools (CloudWatch, Sentry) to monitor health and reduce MTTD. Drove automation of infrastructure provisioning and deployment workflows across environments.
Senior Full-Stack Developer at Cognizant
February 20, 2018 - PresentBuilt React.js incentive tools, enhancing UX and reducing customer support inquiries by 25%. Redesigned backend REST APIs for synchronous processing using Node.js and Express, cutting claim processing time from 12 hours to under 3 hours. Optimized Redux state management and implemented performance tuning, improving dashboard responsiveness by 30%. Integrated fraud detection systems and payment APIs, strengthening transaction security. Developed CI/CD pipelines with Jenkins and GitHub Actions, accelerating deployments and reducing rollback times. Implemented unit and integration testing with Jest and Mocha, increasing test coverage and reducing production bugs. Collaborated with cross-functional teams to deliver cloud-ready applications on AWS. Applied clean code practices and Agile methodologies to boost productivity and collaboration.
Senior Software Engineer at Ropardo
July 1, 2016 - PresentEnhanced shipment tracking systems by optimizing backend logic and data validation, reducing manual errors by 30%. Integrated HIPAA-compliant health care claim processing APIs, improving interoperability and cutting validation errors by 20%. Boosted backend performance by reducing average response times from 800 ms through SQL query optimization, indexing strategies, and database tuning. Developed and maintained RESTful APIs for logistics and health care systems, enabling secure data exchange across platforms. Collaborated in Agile/Scrum sprints, performing code reviews and implementing clean code practices, improving deployment quality and reducing production defects. Assisted in early adoption of CI/CD pipelines with Jenkins, improving deployment automation and reducing rollback times.
Education
Bachelor of Science in Computer Engineering at Lucian Blaga University of Sibiu
January 1, 2012 - January 1, 2016Bachelor of Science in Computer Engineering at Lucian Blaga University of Sibiu
January 1, 2012 - January 1, 2016Bachelor of Science in Computer Engineering at Lucian Blaga University of Sibiu
January 1, 2012 - January 1, 2016Bachelor of Science in Computer Engineering at Lucian Blaga University of Sibiu
January 1, 2012 - October 13, 2025Qualifications
Industry Experience
Software & Internet, Healthcare, Transportation & Logistics, Professional Services, Financial Services, Other
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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