I’m a software engineer with experience building and improving web applications across companies such as Plutora, HP, and Visa. I work with JavaScript, Python, Node.js, React, Angular, Vue, SQL, and NoSQL, and I enjoy solving technical problems, improving application performance, and creating reliable, user-friendly features. I’m based in Slatina, Romania, and hold a Bachelor’s degree in Computer Science from the University of Bucharest.

Marin Ionel Trandafir

I’m a software engineer with experience building and improving web applications across companies such as Plutora, HP, and Visa. I work with JavaScript, Python, Node.js, React, Angular, Vue, SQL, and NoSQL, and I enjoy solving technical problems, improving application performance, and creating reliable, user-friendly features. I’m based in Slatina, Romania, and hold a Bachelor’s degree in Computer Science from the University of Bucharest.

Available to hire

I’m a software engineer with experience building and improving web applications across companies such as Plutora, HP, and Visa. I work with JavaScript, Python, Node.js, React, Angular, Vue, SQL, and NoSQL, and I enjoy solving technical problems, improving application performance, and creating reliable, user-friendly features. I’m based in Slatina, Romania, and hold a Bachelor’s degree in Computer Science from the University of Bucharest.

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Experience Level

Expert
Expert
Expert
Expert
Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Work Experience

Software Engineer at Visa
September 1, 2023 - Present
Contributes to the design and implementation of features for Visa’s educational technology initiatives, focusing on improving user engagement. Performs backend development using Node.js and Python, integrates RESTful and third-party APIs to enhance functionality and user experience, and handles debugging and troubleshooting to maintain high application performance. Works with a distributed team to align technical planning with product vision and roadmap discussions, implementing clean coding practices and scalable solutions to support growth of Visa’s online platforms.
Web Development Specialist at Visa
September 1, 2023 - Present
Currently refining a 6-page charity website, integrating multimedia content and optimizing site performance. Developing an easy-to-use admin interface for managing tournament results and gallery photos, ensuring cross-browser compatibility and accessibility, and collaborating with teammates to meet project milestones within a two-month timeframe.
Senior Software Engineer at Visa
September 1, 2023 - Present
Refactored authorized services in Node.js and PostgreSQL to enforce strict tenant isolation and reduce unauthorized access incidents by 40%. Instrumented React components with TypeScript to surface transaction dashboards while maintaining 99.5% uptime during peak loads. Validated Stripe payment flows integrated with existing ledger servers ensuring idempotent processing and full reconciliation trails. Hardened REST APIs using JWT and row-level security policies to meet compliance requirements for customer financial data. Profiled query performance in PostgreSQL, improving average response time from 850 ms to 210 ms across reporting endpoints. Automated tests suites with Jest and Cypress achieving 85% coverage on critical payment processing modules.
Full Stack Developer at HP
May 1, 2020 - August 31, 2023
Led development of innovative features for HP’s online platforms using Angular and Vue. Wrote, tested, and maintained clean, scalable code with focus on high performance and responsiveness. Managed SQL and NoSQL database interactions and applied database management practices. Participated in technical planning and roadmap discussions using user feedback and performance metrics. Collaborated with remote teams for issue resolution, debugging, and end-user performance optimization, contributing to continuous improvement through best practices and modern methodologies.
Front-End Developer at HP
May 1, 2020 - August 1, 2023
Designed and launched a comprehensive e-commerce solution for a club merchandise site, ensuring responsiveness across devices. Utilized HTML, CSS, and JavaScript, managed the integration of external links and multimedia content, and conducted regular performance optimization to improve speed and reliability. Worked independently to meet deadlines while maintaining open communication with team members for updates and feedback.
Senior Software Engineer at HP
May 1, 2020 - August 1, 2023
Architected backend services in Node.js and PostgreSQL supporting enterprise device management workflows with strong access controls. Refactored React-based admin interfaces using TypeScript to improve maintainability and reduce technical debt across modules. Implemented caching strategies with Redis that lowered database load by 60% on high-traffic endpoints. Validated data integrity checks during bulk updates to customer records, preventing production data corruption. Instrumented observability with custom metrics reducing mean time to detect issues from hours to minutes. Consolidated multiple API versions into a unified REST layer improving developer productivity and reducing duplication. Tested security controls including OAuth flows to ensure compliance with internal enterprise standards. Automated infrastructure provisioning via Terraform enabling consistent staging environments for integration testing.
Web Developer at Plutora
August 1, 2018 - April 1, 2020
Led the development of a user-friendly site for a charity organization, focusing on responsive design and cross-browser compatibility. Implemented HTML, CSS, and JavaScript to create an engaging interface, ensured optimal site performance, and integrated multimedia content to enrich functionality. Collaborated with stakeholders to gather requirements and feedback, and developed an admin interface for easy updates of tournament results and gallery photos to streamline content management.
Software Engineer at Plutora
August 1, 2018 - April 1, 2020
Developed release orchestration dashboards in React to provide visibility into deployment pipelines for enterprise clients. Integrated PostgreSQL stored procedures to track test results and maintain traceability across software versions. Modeled data schemas supporting multi-project reporting while enforcing permission boundaries for different user roles. Automated CI jobs using Jenkins that verified builds and reduced failed deployments by 25%. Documented API contracts for internal tooling to improve onboarding and consistency. Diagnosed performance bottlenecks in reporting queries and applied indexes that improved response times by 45%.

Education

Bachelor of Science in Computer Science at University of Bucharest
January 1, 2014 - January 1, 2018
Bachelor's Degree in Computer Science at University of Bucharest
January 1, 2014 - January 1, 2018
Bachelor of Science in Computer Science at University of Bucharest
January 1, 2014 - January 1, 2018
Bachelor of Science in Computer Science at University of Bucharest
January 1, 2014 - December 31, 2018

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services, Non-Profit Organization, Retail, Education

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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