VASUDEV PAREEK

Software Engineer

Mumbai, Maharashtra, India3 yrs 7 mos experience

Most Likely To Switch

Key Highlights

Stackforce AI infers this person is a Fintech Backend Engineer with expertise in payment systems and quantitative analytics.

JavaSpring BootUpi ApisMicroservicesPythonStochastic CalculusNatural Language Processing

AerospikeAnalytical SkillsCPPCascading Style Sheets (CSS)CassandraChessData ManipulationDesign PatternsEMVEngineeringExpress.jsFinanceGLoVeGitGuice

Learning and implementing distributed payment systems

Jul 2024 – Present · 1 yr 8 mos · Mumbai, Maharashtra, India · On-site

I engineer backend systems that power real-time card transactions for enterprise and banking clients. My work spans the full transaction lifecycle — from authorization to clearing — across Visa, RuPay, and Mastercard networks.
At Zeta, I focus on building low-latency, fault-tolerant microservices using Java (Spring Boot + Guice), ensuring compliance with PCI standards while optimizing for resilience, observability, and throughput.
Core contributions include:
Architecting and scaling ISO-8583/EMV parsers, packagers, and message translators for payment connectors.
Strengthening the authorization and clearing flows with improved concurrency control, retry strategies, and telemetry.
Collaborating cross-functionally to onboard new networks and enterprise clients, integrating with internal systems like Morpheus, Pantheon, and Helios.
Driving code reliability and maintainability through cleaner abstractions, dynamic configuration, and CI/CD compliance.
Focus areas: Payment networks · ISO-8583 · EMV · Java 8/17 · Spring Boot · Guice · Kubernetes · PostgreSQL · Redis · Fintech Infrastructure · Secure Transaction Systems

JavaSpring BootGuiceKubernetesPostgreSQLRedis+2

Jul 2023 – Jun 2024 · 11 mos · Mumbai Metropolitan Region, India · On-site

Engineered and delivered key issuer-side UPI APIs, including Balance Inquiry, Transaction Status, and PIN Management, enhancing core payment functionalities for millions of users.
Developed a critical microservice to enforce NPCI's UPI OC guidelines, implementing transaction limits and security rules. Slashed service latency by 90% by architecting and integrating a high-performance Aerospike solution.
Architected and optimized the UPI transaction processing system by leveraging in-memory databases over traditional OLTP, significantly boosting speed and fault tolerance.
Maintained a suite of automated Cron jobs for processing high-volume data from diverse database systems (PostgreSQL, Cassandra), ensuring reliable data pipelines.

UPI APIsAerospikePostgreSQLCassandramicroservices

Jul 2022 – Jul 2023 · 1 yr · Mumbai, Maharashtra, India · On-site

Equity Derivatives Modelling Team
Model Risk Management and Model Testing
SR 11-7 Model Risk Management and Re-reviews ( Crash Cliquet, VIX Futures and Options, Interest Rates Futures, Vanilla Options (American / European), Barrier Options such as Annual Review Notes and several other exotic options)
Model Usage Restrictions Framework
Python,CPP
Stochastic Calculus

PythonCPPStochastic Calculus