SANJU PIPAL
Delhi
Summary
Backend Developer with 5+ years of experience delivering scalable and high-performance systems using Java, Spring Boot, and MySQL. Strong track record in optimizing APIs, improving system performance, and ensuring production reliability. Passionate about building efficient backend architectures and contributing to high-growth, product-driven teams.
Overview
5
5
years of professional experience
Work History
Sr Software Engineer
Quarks Technosoft Pvt Ltd
Noida
05.2024 - Current
- Contributed to backend systems powering an enterprise IoT connectivity platform managing SIM lifecycle, device provisioning, billing, and usage tracking.
- Designed and developed scalable REST APIs for SIM lifecycle management, including activation, suspension, termination, and retention workflows.
- Implemented complex business logic for telecom workflows, enhancing retention discount handling and ensuring accurate service restrictions and order lifecycle tracking.
- Optimized MySQL queries (joins, JSON extraction, aggregations), improving API response time by ~40% while decreasing database load.
- Implemented distributed caching using Hazelcast, improving read performance and reducing repeated DB hits for frequently accessed configuration data.
- Enhanced SMS mobile-terminated (MT) processing pipeline, streamlining bulk CSV ingestion and duplicate validation through configuration-driven execution using templating (J2/properties).
- Designed transaction logging and audit mechanisms, ensuring traceability of all critical operations across SIM and billing workflows.
- Addressed critical production issues, focusing on multi-tenant admin access and order remark data inconsistencies.
- Strengthened data integrity and validation layers, minimizing invalid state transitions in telecom workflows.
Back End Developer
Grappus
Gurgaon
06.2022 - 05.2024
- Led development and integration of GCT Retention Discounts management system, empowering CSRs to manage SIM termination requests and apply retention discounts via AirControl Platform.
- Developed backend logic for managing SIM suspension and termination processes, creating APIs to track 7-day negotiation window for retention users and OpCo Admin.
- Enabled transaction logs for all operations, ensuring comprehensive action history and traceability for audit compliance.
Back End Developer
Dhwani Rural Information Systems Pvt. Ltd.
Gurgaon
03.2021 - 06.2022
- Managed backend development for multiple projects, integrating APIs and system components using Spring Boot and Hibernate to enhance system interoperability.
- Created API to track and report unique visitors and visits on website, leveraging Spring Boot and JPA for efficient data processing and storage, providing valuable insights into user engagement.
- Created API for version control of uploaded files on the portal, streamlining file update processes.
- Developed and integrated OTP service for 'Forgot Password' feature using JavaMail API for email communication and Spring Security for user authentication, enhancing user security.
- Designed and implemented 3-level approval flow for user forms in City Finance 15th FC Module, optimizing workflow and minimizing manual intervention.
Education
B.Tech - Information Technology
Guru Gobind Singh Indraprastha University
Delhi01-2020
Skills
- Spring and Java
- Microservices architecture
- Hibernate ORM
- Kafka messaging system
- AWS cloud services
- Docker containerization
- MySQL database management
- Mockito testing framework
- ReactJS library
Hobbies and Interests
Football
Languages
- Hindi
- English
Timeline
Sr Software Engineer
Quarks Technosoft Pvt Ltd
05.2024 - Current
Back End Developer
Grappus
06.2022 - 05.2024
Back End Developer
Dhwani Rural Information Systems Pvt. Ltd.
03.2021 - 06.2022
B.Tech - Information Technology
Guru Gobind Singh Indraprastha University