Deepak KumarBackend systems with presence.
Building reliable, secure, and high-performance backend systems at scale.
Who I Am
A backend engineer passionate about distributed systems, blockchain, and open source.
Certifications
Amazon Web Services (AWS)
Issued Jan 2026 · Expires Jan 2029
ID: bd95e5c0994a413faaf2973c7eaa9d1e
Microsoft
Issued Jan 2026 · Expires Jan 2027
ID: B2DF224D07787774
Microsoft
Issued Feb 2026 · Expires Feb 2028
ID: 2E1E726476610B30
Software Engineer with 4.9 years of experience building scalable, fault-tolerant backend systems across capital markets and blockchain domains. At TCS, contributed to distributed systems processing millions of events per day using Java, Spring Boot, Kafka, and PostgreSQL. AWS & Azure certified, currently a GSoC 2026 aspirant contributing to Apache Fineract, and strengthening DSA fundamentals with 564+ problems solved on Scaler.
Chennai, India
+91 86677 68959
Education
Master of Computer Applications (MCA)
SASTRA University
Computer Science
CGPA: 8.52021 – 2023
Bachelor of Science
Sri Krishna Arts and Science College, Coimbatore
Computer Science
CGPA: 8.0Jun 2019 – Apr 2021
Work Experience
4+ years building production systems at Tata Consultancy Services.
Software Engineer (SDE-2)
Tata Consultancy Services
CHESS Replacement (CHESS-R) – Australian Securities Exchange (ASX)
- Built distributed systems processing millions of trade events/day using Java, Spring Boot, Kafka, and PostgreSQL.
- Designed idempotent Kafka consumers with disciplined offset management ensuring zero message loss during failovers.
- Implemented SCIM 2.0 provisioning APIs and SAML SSO with assertion validation, session management, and CSRF protection.
- Deployed microservices in multi-AZ Kubernetes on AWS with TLS enforcement and structured monitoring.
Blockchain Developer
Tata Consultancy Services
Talent Development – Internal Blockchain Platform
- Developed and optimized Ethereum smart contracts for decentralized applications.
- Designed 50+ scenario-based blockchain coding challenges and 10 'Slam-Dunk' high-difficulty contest problems.
- Authored research paper on MetaPlay — decentralized content platform — selected at TCS TACTICS India-level.
- Created and published 'Blockchain Analytics' course on Fresco Play (TCS internal learning platform, 2022) — actively consumed by TCS associates.
- Built PoC integrating blockchain with machine learning for enterprise use cases.
Skills & Technologies
Tools and technologies I use to build scalable, reliable systems.
Languages
Frameworks
Blockchain
Databases
Infrastructure
Tools
Projects
From capital markets infrastructure to decentralized applications and open source contributions.
CHESS-R – ASX Capital Markets Platform
Large-scale capital markets backend for the Australian Securities Exchange (ASX) — one of the world's top 10 exchanges. Built event-driven microservices processing millions of trade events per day using Kafka with idempotent consumers and disciplined offset management for zero message loss. Implemented SCIM 2.0 provisioning APIs, SAML SSO with assertion validation, and CSRF protection. Deployed in multi-AZ Kubernetes on AWS with TLS enforcement, structured monitoring, and strict financial compliance requirements.
Quartz Gateway
Internal distributed gateway product at TCS. Contributed to the Notification microservice (event-driven alert delivery), IAM microservice (RBAC access control and identity management), and end-to-end technical testing suite. Led Java 8 → Java 17 migration for improved performance and security, and built new Kafka producer/consumer pipeline features for real-time event streaming across microservices.
MetaPlay – Decentralized Content Marketplace
Proof-of-concept decentralized content creation platform on Ethereum where creators and consumers transact without any central authority. Leverages IPFS for tamper-proof content storage, Polygon L2 for 65,000 TPS throughput, and The Graph for efficient on-chain data querying. Features community governance via DAO voting, tokenized incentives for creators, and copyright enforcement through smart contracts. Research paper published on Zenodo — selected at TCS TACTICS India-level competition.
DAML Blockchain POC
Internal proof-of-concept at TCS exploring DAML (Digital Asset Modelling Language) smart contracts for enterprise blockchain use cases. Modeled complex financial workflows using DAML's type-safe, privacy-first contract model. Evaluated Digital Asset's platform for production feasibility in capital markets settlement and asset lifecycle management scenarios.
CoinFantasy – DeFi Platform
DeFi platform featuring on-chain staking mechanisms, liquidity incentives, and reward distribution built on Ethereum using Solidity. Implements time-locked staking pools, compounding reward calculations, and secure withdrawal patterns to guard against reentrancy and front-running vulnerabilities.
SmartContractsHub
Curated collection of production-quality Ethereum smart contracts covering DeFi primitives (staking, vaults, token standards), access control patterns (Ownable, Role-based), upgradeable proxy patterns, and gas-optimized data structures. Designed for both educational reference and as a practical starting point for enterprise DApp development.
Apache Fineract – GSoC 2026
Active open-source contributor to Apache Fineract, a core banking platform powering financial services in emerging markets. Migrating integration tests from RestAssured to a type-safe Feign client — improving compile-time safety, reducing boilerplate, and increasing test reliability. Contributed 5+ merged PRs covering API client generation, DTO improvements, and end-to-end test scenarios.
My Projects
Personal builds, client websites, and side ventures — things I've crafted outside of my day job.
Qubits of DPK
My engineering blog where I write about Java, backend systems, databases, and system design — documenting the learning journey as a software engineer, one qubit at a time.
Purple Creations
Official website for Purple Creation, a Tirupur-based apparel manufacturer. Built with Next.js, TypeScript, and Tailwind CSS to present their manufacturing capabilities, product gallery, and brand collaborations through a modern, interactive design.
K.B. Associates
K.B. Associates is a trusted loan consultancy in Tiruppur with over 17 years of experience and more than 750 successful loan applications — helping individuals and businesses secure home loans, business loans, mortgage loans, construction loans, and loan takeovers with simple guidance and professional support.
GSoC 2026 Contributor
Contributing to Apache Fineract — an open-source core banking platform used by millions worldwide.
Apache Fineract
GSoC 2026ActiveMigrating integration tests from RestAssured to a type-safe Feign client under FINERACT-2441. Improving test reliability, reducing flakiness, and contributing to the project's long-term maintainability as part of Google Summer of Code 2026.
Contribution Activity
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Research & Interests
The things that excite and inspire me beyond engineering.
Decentralized Content Creation Marketplace: A Modular Web3 Architecture for Talent Development
A proof of concept implementing a decentralized content creation platform using Ethereum, where participants can engage in creating or consuming content without any central authority. Leverages IPFS for decentralized storage, Polygon L2 for 65,000 TPS scaling, and The Graph for efficient blockchain querying. Proposes community governance, tokenized incentives, and copyright management through smart contracts.
Video Games
Gaming isn't just a hobby — it's where I first learned problem-solving, strategy, and systems thinking. From open-world RPGs to competitive multiplayer, games shaped how I approach complex engineering challenges.
Space Exploration
The universe operates at a scale that makes distributed systems feel small. I'm fascinated by how humanity pushes the boundaries of physics and engineering — from Mars missions to Webb telescope discoveries.
Quantum Computing
Quantum sits at the intersection of physics, mathematics, and computer science — where classical computing meets its limits. I follow breakthroughs from IBM, Google, and academia as the next wave of computation takes shape.
Let's Connect
Open to opportunities, collaborations, and interesting conversations.
Whether you have a role in mind, want to collaborate on an open-source project, or just want to chat about distributed systems, blockchain, or space. I'd love to hear from you.