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Arjun Kumar

Tech Lead @ Sirion.ai | Ex- Cars24, Bank of America | Java | Spring boot | Microservices

Greater Delhi Area

8+ years of work experience

Sirion
Jul 20262 mosPresent

Gurugram, Haryana, India

CARS24
Apr 20251 yr 4 mosJul 2026

Gurugram, Haryana, India

Leading a team of 3 backend engineers across design, development, and delivery for 15+ microservices powering CARS24's car buying, selling, servicing, subscriptions, and procurement journeys. - Built and scaled microservices including Slot Planner, Key Management, DA Panel, Car Servicing, and Media Service. - Owned the end-to-end B2B car procurement workflow using Temporal for reliable workflow orchestration and state management. - Led finance automation for buy/sell flows with SAP HANA integrations. - Reduced API latency by 20% through Redis optimization, caching strategies, and code refactoring. - Improved TDD-to-token conversion by 8% by revamping document upload and test drive scheduling flows. - Led Okta to in-house user management migration for internal, external, and consumer authentication. - Led ArangoDB to MongoDB migration using a dual-write strategy with zero downtime and no data inconsistencies. - Enhanced search and customer experience using Elasticsearch geo-based sorting. Tech stack: Java, Spring Boot, MySQL, MongoDB, ArangoDB, Redis, Elasticsearch, Temporal, GCP Pub/Sub, Kubernetes, Docker, AWS S3, JUnit, Mockito.
CARS24
Apr 20223 yrsMar 2025

Gurugram, Haryana, India

CARS24
Sep 20192 yrs 7 mosMar 2022

Gurugram, Haryana, India

Bank of America
Jun 20181 yr 4 mosSep 2019

Gurugram, Haryana, India

Arjun’s AI Stack

antigravity
antigravity
opencode
opencode

Education

Delhi Technological University (Formerly DCE)

Bachelor of Technology (B.Tech.), Software Engineering

Delhi Technological University (Formerly DCE)

20144 yrs2018

High School

Rajkiya Pratibha Vikas Vidyalaya, Rajniwas Marg, Delhi

20112 yrs2013

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Headline

Tech Lead @ Sirion.ai | Ex- Cars24, Bank of America | Java | Spring boot | Microservices

About

Tech Lead and backend engineer with 7.5+ years of experience building scalable Java, Spring Boot, microservices, and distributed systems across car buying, selling, servicing, subscriptions, payments, finance automation, and authentication platforms. At CARS24, I lead backend engineering across 15+ microservices and have built platforms including Slot Planner, Key Management, DA Panel, Car Servicing, and Media Service. I have owned end-to-end B2B procurement workflows using Temporal, led finance automation integrations with SAP HANA, migrated systems with zero downtime, and improved performance through Redis caching, refactoring, and search optimization. My core strengths are Java, Spring Boot, microservices, system design, Redis, Elasticsearch, Kubernetes, Docker, GCP, AWS, MySQL, MongoDB, ArangoDB, Pub/Sub, RabbitMQ, and REST APIs. I enjoy solving backend scalability problems, improving developer velocity, and leading teams through high-impact product and platform delivery.

Location

Greater Delhi Area

AI stack

antigravity

opencode

Work experience

Technical Lead 1 - Development at Sirion, Jul 2026 - Present · 2 mos, Gurugram, Haryana, India

Tech Lead at CARS24, Apr 2025 - Jul 2026 · 1 yr 4 mos, Gurugram, Haryana, India, Leading a team of 3 backend engineers across design, development, and delivery for 15+ microservices powering CARS24's car buying, selling, servicing, subscriptions, and procurement journeys. - Built and scaled microservices including Slot Planner, Key Management, DA Panel, Car Servicing, and Media Service. - Owned the end-to-end B2B car procurement workflow using Temporal for reliable workflow orchestration and state management. - Led finance automation for buy/sell flows with SAP HANA integrations. - Reduced API latency by 20% through Redis optimization, caching strategies, and code refactoring. - Improved TDD-to-token conversion by 8% by revamping document upload and test drive scheduling flows. - Led Okta to in-house user management migration for internal, external, and consumer authentication. - Led ArangoDB to MongoDB migration using a dual-write strategy with zero downtime and no data inconsistencies. - Enhanced search and customer experience using Elasticsearch geo-based sorting. Tech stack: Java, Spring Boot, MySQL, MongoDB, ArangoDB, Redis, Elasticsearch, Temporal, GCP Pub/Sub, Kubernetes, Docker, AWS S3, JUnit, Mockito.

Senior Software Engineer at CARS24, Apr 2022 - Mar 2025 · 3 yrs, Gurugram, Haryana, India

Software Engineer at CARS24, Sep 2019 - Mar 2022 · 2 yrs 7 mos, Gurugram, Haryana, India

Sr. Tech Associate at Bank of America, Jun 2018 - Sep 2019 · 1 yr 4 mos, Gurugram, Haryana, India

Education

Bachelor of Technology (B.Tech.), Software Engineering, Delhi Technological University (Formerly DCE)

High School, Rajkiya Pratibha Vikas Vidyalaya, Rajniwas Marg, Delhi

Arjun Kumar - Technical Lead 1 - Development in Greater Delhi Area | Tal