Hi, I'm Arvind Kumar
Staff Engineer | 13+ Years in Backend Development & Architecture
My Story
I'm a Staff Engineer with over 13 years of experience in backend development and distributed systems architecture. I specialize in building scalable, high-performance systems using Java, Spring Boot, and cloud-native technologies.
I'm passionate about sharing knowledge through ebooks, Medium series, YouTube tutorials, and cohort-based learning programs. My content focuses on making complex backend engineering topics — system design, microservices, Kafka, and interview preparation — accessible and practical.
When I'm not architecting systems, you'll find me conducting cohort-based learning sessions and mock interviews, helping engineers level up their backend skills and crack top-tier tech interviews.
Expertise
Technical Skills
Soft Skills
Professional Journey
Staff Engineer
Chegg
- Led migration of a legacy monolith to a cloud-native microservices architecture serving 10M+ monthly users, reducing request latency by 40% and improving system availability to 99.00%.
- Overhauled the observability stack — introduced distributed tracing across microservices and Kafka ecosystem, cutting time-to-fix production issues by a significant margin.
- Drove adoption of a Kafka-based event streaming platform across multiple teams, enabling near real-time processing of millions of student activity events daily.
- Identified excessive service granularity and led an initiative to consolidate services, resulting in a cleaner architecture, quicker release cycles, and improved dashboarding.
- Partnered with product and business teams to define technical strategy for a personalized learning platform, directly contributing to a significant increase in user engagement.
- Mentored and coached 10+ engineers, influencing architectural decisions beyond immediate team scope and improving organizational engineering quality.
- Contributed to finalizing AI code assistance and PR review tooling (Cursor & CodeRabbit).
- As part of Gen AI disruption to the business, leading cost-cutting and architecture simplification initiatives to streamline systems and reduce operational overhead.
Senior Software Developer – G2
TSYS Card Tech
- Contributed to implementation of a secure API gateway integrating fraud detection, identity verification, and payment authorization, ensuring PCI DSS compliance.
- Spearheaded adoption of end-to-end encryption architecture (JWT, JWK, RSA, AES), protecting millions of transactions per day and reducing security incidents.
- Introduced observability practices in applications, cutting incident resolution time significantly.
- Partnered with architects and senior leadership to modernize transaction services into microservices, improving scalability and system maintainability.
- Raised the bar by enforcing clean code standards and mandatory 95% unit test coverage, validated with mutation testing.
- Mentored junior engineers through code reviews, design sessions, and security best practices.
Senior Engineer
Hughes Systique Corporation
- Worked on AEM workflows and created documentation to help clients seamlessly use the platform.
- Collaborated with project managers, developers, QA, and customers to resolve complex technical issues.
- Enhanced software functionality by identifying and resolving systemic technical issues.
Project Associate
Cognizant Technology Solutions
- Contributed to banking domain transformation programs focusing on modular and scalable architecture improvements.
- Developed comprehensive project plans including objectives, milestones, and resource allocation, ensuring on-time delivery of multi-million-dollar projects.
- Collaborated with senior architects to establish coding standards and modular design principles, improving system maintainability.
System Engineer
Tata Consultancy Services
- Successfully completed rigorous Java training program, quickly moving into feature development roles.
- Implemented core features in enterprise-scale Java applications, including requirement analysis, development, testing, and deployment.
- Gained early experience in stakeholder collaboration, documentation, and defect resolution — laying the foundation for future architectural roles.
Certifications
SCJP 1.8
Oracle
AWS Solutions Architect – Associate
Amazon Web Services
Education
B.Tech / B.E.
Uttar Pradesh Technical University (UPTU)
2012What I Do Apart from Regular Job
Tutorials
Practical guides that break down complex backend topics into digestible lessons.
Cohorts
Live learning programs with real-world projects and personalized feedback.
Mentorship
One-on-one guidance for your career growth and technical journey.
Community Impact
13+
Years of Engineering
Building and scaling enterprise-grade platforms across Finance, Insurance, and EdTech.
18K+
YouTube Subscribers
Codefarm channel producing educational content on Java, Distributed Systems, and System Design.
100+
Engineers Mentored
Coaching engineers on architecture, best practices, and career growth through cohorts and 1-on-1 sessions.
4K+
Medium Followers
Writing on Medium about backend engineering, distributed systems, and engineering leadership.
What People Say
“Having himself been a senior engineer, he has also structured the interview in a manner that reflects this fact. On the basis of your role, he attempts to explore different aspects. Having been interviewed as Engineering Manager role, he unleashes technical knowledge that I have provided in my CV, System Design questions and finally two behavioral questions. Lastly, he provided feedback on where I had made errors and areas for improvement. Highly recommend as a mock interviewer, regardless of whether it is a senior or junior position.”
Sumit
Mock Interview
“This e-book offers a comprehensive and meticulously organized exploration of microservices architecture, tailored for both interview preparation and real-world application. Its integration of domain-specific scenarios, detailed visual diagrams, and practical Java implementations provides exceptional clarity and relevance. The coverage of advanced topics such as AI/ML integration, security protocols, and compliance frameworks reflects current industry demands. A highly valuable resource for software engineers seeking to design scalable, secure, and modern distributed systems.”
Anonymous
Microservices Architecture Interview Guide
“I have read couple of chapters and i must say these are curated very carefully keeping in mind the interviews and real life industry scenarios. I highly recommend this book to anyone who is looking for thorough understanding about microservices. Thanks Arvind for putting your effort into this book. Looking forward for more like this.”
Ashok Maurya
Microservices Architecture Interview Guide
“The guidance is very helpful.”
Aditya Srivastva
Microservices Architecture Interview Guide