Open to opportunities

Varun Kosuru

@varunkosuru

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Java backend engineer specializing in scalable microservices and performance optimization.

India

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What I'm looking for

I seek a backend/platform role focused on scalable microservices, operational excellence, measurable impact, mentorship, and continual technical growth.

I am a Java backend engineer with 6+ years designing and scaling microservices systems that handle mission-critical workloads. I focus on building resilient, performant services and delivering measurable business impact through engineering.

At Bizongo and Tripadvisor I led end-to-end development of microservices ecosystems, delivered major latency reductions (95%), and implemented systems that prevented $120K in fraud and saved $36K annually in infrastructure costs.

I have extensive hands-on experience with Java, Spring Boot, AWS (Lambda, Kinesis, DynamoDB, S3), Kafka, Redis, and robust testing using JUnit and Mockito, maintaining 95% test coverage across multiple services. I also upgraded frameworks, redesigned legacy architectures, and integrated external SDKs into in-house platforms.

I mentor junior engineers, improve operational excellence through on-call ownership and runbooks, and build platforms that increase team velocity and reduce production incidents. I seek to join teams that value measurable impact, reliability, and continuous improvement.

Experience

Work history, roles, and key accomplishments

Software Engineer 2

Tripadvisor

May 2025 - Dec 2025 (7 months)

Designed and shipped a Java/Spring Boot Golden Path experimentation framework adopted by 65% of experiments, reducing experiment setup time by 50% and operating infrastructure for 500+ experiments and 1,000+ data streams with on-call reliability.

Java Spring Boot Microservices Observability SDK Integration Reliability Engineering Incident Response

Software Engineer 2

Bizongo

Nov 2022 - Mar 2025 (2 years 4 months)

Engineered high-performance Java/Spring Boot microservices and REST APIs, achieving 95% response-time reduction and P99=300ms; redesigned legacy systems to save $36K annually and built a fraud detection service preventing $120K in losses.

Java Spring Boot Microservices AWS Lambda REST APIs Database Design Event Driven Architecture Fraud Detection

Software Engineer 2

Spoonshot

Jun 2022 - Oct 2022 (4 months)

Architected and delivered V1 of the ‘Genie’ operations platform using React, Django, and MySQL and optimized core REST APIs to reduce query execution time by 70%, cutting user-reported latency issues by 30%.

Django React MySQL REST APIs Performance Optimization API Design Query Optimization

Software Engineer

Zenoti

May 2019 - May 2022 (3 years)

Led end-to-end development of customer onboarding and payment processor setup including a dispute management subsystem and built internal tooling/runbooks that enabled 92% first-contact resolution for operational queries.

Java Backend Development Payment Integration Customer Onboarding Internal Tooling Troubleshooting Cross Functional Collaboration

Software Intern

DOS Lab, IIT Madras

May 2018 - Jul 2018 (2 months)

Co-led a kernel transformation project to convert the vanilla Linux kernel to a Minimalistic Object Oriented Linux (MOOL), contributing to low-level systems research and implementation.

C#Kernel Development Systems Programming Research Linux