Technical Skills
Programming Languages
Data Processing & Big Data
Cloud & Platforms
Frameworks & Tools
Work Experience
Application Developer 2
Oracle
December 2024 - Present- Modernized a mission-critical finance platform, migrating 50M+ daily rows of AR/GL data from Oracle PL/SQL jobs to Apache Spark lakehouse—slashing batch runtime by 80% (9h → 1.8h)
- Engineered a modular ETL pipeline (Spark 3, Delta Lake, Parquet) with partitioning by period + entity, late-arrival upserts, and CDC handling
- Orchestrated end-to-end pipelines in Oracle Data Integrator (ODI) with 60+ data-quality rules (≥98% pass rate)
- Boosted data freshness from T+2 days to hourly and cut compute cost by 40%
Senior Software Engineer
Mobilewalla
January 2024 - November 2024- Built a high-throughput microservice (Java 8, Spring Boot, AWS) for LendBetter fintech platform with 20+ REST endpoints delivering credit-risk scores in <150ms P99
- Became the product line's #3 revenue generator within 6 months, adding ≈10% to total company profit
- Hardened security with JWT-based stateless auth, request-level HMAC signing, and end-to-end TLS
- Built data access via JPA, Amazon RDS (MySQL) and DynamoDB, trimming average query latency 45%
- Cut client integration time from 2 weeks to 3 days through comprehensive API documentation
Software Engineer
Mobilewalla
June 2022 - December 2023- Created a reusable Java SDK for AWS EMR cluster management, cutting job failures 30% and EMR spend 25%
- Architected unified Spark layer (Scala/Java, Spring Boot) powering real-time ETL API and nightly analytics pipeline
- Drove 50% cloud-cost savings on terabyte-scale workloads through dynamic right-sizing and spot instance optimization
- Built user-agent analytics pipeline processing large volumes using AWS EMR, Redis/ElastiCache, and Apache Airflow
Software Engineer Intern
Mobilewalla
January 2022 - March 2022- Developed a Spark & Scala framework generating 200+ metrics and quality standards for Product Managers
- Created data quality assessment tools for evaluating new & existing third-party signal data
- Implemented automated data validation and reporting systems
Featured Projects
High-throughput microservice delivering alternate-data credit-risk scores and income signals in <150ms P99. Became #3 revenue generator adding ≈10% to company profit within 6 months.
Mission-critical finance platform migration processing 50M+ daily rows. Reduced batch runtime by 80% (9h → 1.8h) and cut compute costs by 40% using Apache Spark lakehouse architecture.
Reusable Java SDK standardizing AWS EMR cluster management for 6+ engineering teams. Cut job failures by 30% and EMR spend by 25% through dynamic optimization.
Unified Spark layer powering real-time ETL API and nightly analytics pipeline. Achieved 50% cloud-cost savings on terabyte-scale workloads through optimization.
IoT pollution sensor (Arduino + Wi-Fi) streaming PM₂.₅/PM₁₀ data to Firebase in real-time. Java-based Android app converts readings to AQI with <2s end-to-end latency.
Education
Bachelor of Engineering in Instrumentation and Electronics Engineering
Jadavpur University, Kolkata
2018 - 2022CGPA: 8.15 - Specialized in instrumentation, electronics, and computer systems engineering