Headline

Software engineer III, American Express | Payment Tokenisation

About

As a Software Engineer at American Express, I specialize in Java, Golang, and REST API development within the Payment Tokenization domain, creating secure and scalable solutions to meet the needs of modern financial systems. With a strong focus on backend development, I’ve contributed to building high-performance APIs that ensure data security and reliability in sensitive payment workflows. My experience includes designing and implementing robust microservices architectures, optimizing CI/CD pipelines, and driving application performance in mission-critical systems. Outside work, I enjoy exploring emerging technologies and honing my skills through competitive coding challenges.

Location

Karnataka

AI stack

codex

gemini

claudecode

githubcopilot

Devin

Work experience

Software Engineer III at American Express, Jul 2025 - Present · 1 yr 2 mos

Software Engineer II at American Express, Feb 2024 - Jul 2025 · 1 yr 6 mos

Software Engineer I at American Express, Aug 2022 - Feb 2024 · 1 yr 7 mos

Summer Intern at American Express, May 2021 - Jul 2021 · 3 mos

Education

Bachelor of Technology - BTech, Electronics and Communications Engineering, National Institute of Technology Karnataka

Public links

leetcode: https://leetcode.com/rajathatr19

codeforces: https://codeforces.com/profile/rajathatr19