Sachin Tyagi

Leading high-impact, scalable backend service development in a cross-functional engineering team. Focused on designing robust, high-performance APIs and platform components that power key financial services at PayPal.

Key Responsibilities:

- Spearheading architecture design and implementation of RESTful services using Java (Spring), Jackson, and Jersey.

- Leading migration initiatives to modern frameworks and improving service observability and performance.

- Collaborating with product managers and UX teams to align technical designs with business requirements.

- Mentoring junior engineers and performing peer code reviews to ensure quality and consistency.

- Driving innovation by identifying performance bottlenecks and introducing system improvements.

Contributed to mission-critical service development and maintenance in a large-scale, distributed microservices ecosystem. Focused on backend logic, system integration, and API development for core PayPal services.

Key Achievements:

- Implemented services to enable PayPal Working Capital for merchants.

- Successfully led team in the development of a robust approval system for the GML Marketing Team, resulting in a 20% increase in product awareness and conversion rate.

- Successfully led team to expend PayPal Working Capital in European including France, Germany and Netherland resulting in a 10% increase in merchant loan origination.

- Designed and maintained scalable backend modules for transaction and identity services.

- Refactored legacy service components for better modularity, resulting in a 30% improvement in system efficiency.

- Integrated third-party APIs and internal services using secure and optimized protocols.

- Actively participated in Agile ceremonies and collaborated across engineering, QA, and DevOps teams. Technologies: Java, RESTful APIs, Jenkins, Git, Spring, MySQL, Docker, Jira

Joined PayPal as a senior engineer with a focus on backend systems, LAMP stack optimization, and service integrations. Helped modernize legacy PHP-based systems and transition towards microservice-based architectures.

Highlights:

- Building REST service - Designed and implemented risk decisioning service which provide PayPal working capital loan to PayPal merchants.

- Design and development of application modules and micro services

- Took ownership of deployment pipelines and CI/CD improvements for faster feature rollouts.

• Prosper is a peer-to-peer lending platform which allows users to get personal loan and at the same time you can lent your money to buyers through this platform. There are more than 3 million members.
• Prosper allows people to invest in each other in a way that is financially and socially rewarding. On Prosper, borrowers list loan requests between $2,000 and $35,000 and individual lenders invest as little as $25 in each loan listing they select. Prosper handles the servicing of the loan on behalf of the matched borrowers and investors.
• At Prosper, built a brand new Scalable restful application in Java without impacting existing legacy .Net application.
• Implemented Investor registration funnel to onboard investors and invest on the listings/loans which created by borrowers.
• Implementation for onboarding partners and they can manage their campaigns and their custom pages on our website to divert the traffic and generate the revenue.
• Implemented Complete Java stack from scratch. (Existing .Net Stack)
• Implement rest API using a REST Easy framework to migrate old legacy system.
• Worked in Agile environment.

• Auction.com is the nation's leading online real estate marketplace. This is a real estate platform that allows buyers, sellers, and real estate professionals to search, list and transact properties completely online.
• Focusing the team to ensure an on-time delivery of the agreed products.
• Encouraging full participation of team members within their defined role and responsibilities.
• Design and development of software to support web application development environment.
• Design and development of application modules and components of web applications.
• Development of documentation of test procedures for software.
• Testing, Debugging and release of software programs.
• Other miscellaneous tasks related to the development and maintenance of a high-quality software code.

• Website application architecture design, development, and unit testing.
• Database design and deployment.
• Development of documentation of test procedures for software.
• Testing, Debugging and release of software programs.
• Developed web application Using PHP, cakePhp Framework, Joomla, MySQL, CSS, HTML & JavaScript.

• Worked on various web sites using PHP and PHP Frameworks.
• Database design and deployment.
• Develop various type of websites including online gaming website, social networking site and shopping websites.
• Testing, Debugging and release of software programs.
• Developed web application Using PHP, smarty, cakePhp Framework, MySQL, CSS, HTML & JavaScript.