DEEPAK KUMAR

Reduced p99 inference latency 35% via intelligent load-balancing and circuit breaking.

LLM Inference Gateway

Load-aware p99-latency routing across model-serving backends with circuit breaking, Prometheus metrics, and Grafana dashboards. Enables intelligent routing, provider failover, and rate limiting across multiple LLM backends without application code changes.

PythonFastAPIPrometheusGrafanaDocker

3x throughput improvement over naive request-per-inference via dynamic batching.

Dynamic Batching Inference Server

High-throughput ML inference server with configurable max-batch/max-wait, Kubernetes HPA autoscaling on queue depth, and a load-generator stress harness. Dynamically batches incoming prediction requests to maximize GPU utilization and throughput.

PythonKubernetesHPADockerML Inference

Blockchain · Open Reference

SmartContractsHub

Reference architecture for gas-optimized DeFi patterns used across enterprise DApps.

A curated collection of production-quality Ethereum smart contracts - DeFi primitives, access-control patterns, upgradeable proxies and gas-optimized data structures for enterprise DApp development.

SolidityEthereumJavaScriptDeFi

Frontend · E-Commerce

Purple Creation

Delivered a high-performance, visually engaging corporate landing page to drive global B2B apparel leads.

Production-ready Next.js 14 website for a premium apparel manufacturing company. Built with Tailwind CSS, Framer Motion, Spline 3D integrations, and a fully functional contact system via Resend.

Next.jsTailwind CSSFramer MotionSpline 3DResend

Frontend · Finance

K.B. Associates

Modernized the digital presence for a regional financial consultancy with SEO optimization and lead-capture forms.

A premium, high-performance financial services website built with Next.js 14 for a leading loan consultancy. Features smooth staggered entrance animations, scroll-triggered reveals, and a floating WhatsApp integration.

Next.jsTypeScriptFramer MotionTailwind CSS

Backend · Architecture

Qubits Of DPK

Created a master reference guide for production-grade coding practices, strict encapsulation, and test-driven verification.

A comprehensive Java repository covering Object-Oriented Design, SOLID principles, Multithreading, and Design Patterns. Refactored to meet Google-level readability and engineering standards.

JavaOOPSOLIDDesign PatternsMultithreading

Backend · Security

Enterprise RBAC Gateway

Secured enterprise microservices with edge JWT validation and OPA dynamic authorization.

An enterprise-grade, reactive API Gateway built with Spring Cloud Gateway. Enforces edge authentication via OIDC/JWT and integrates with Open Policy Agent (OPA) for declarative, route-level authorization. Features a fully non-blocking, append-only PostgreSQL audit log and Prometheus metrics for comprehensive observability.

JavaSpring CloudOPAPostgreSQLPrometheus

Backend · API Gateway

Rate Limit Control Plane

Engineered distributed per-tenant rate limiting using Redis token buckets and hot-loaded plugins with zero downtime.

An extensible, production-grade API gateway platform built with Java and Spring Boot. Provides per-tenant distributed rate limiting, real-time observability, and a runtime-loaded plugin architecture that allows third-party integrations to be deployed via dynamic class loading without core service redeploys.

JavaSpring BootRedisRate LimitingPrometheus

Engineered a scalable, resilient control plane demonstrating Azure Service Fabric's advanced partitioning and reliable collections.

Orchestra-SF

A workload-orchestration control plane on Azure Service Fabric. Demonstrates stateless and stateful Reliable Services, Int64 partitioning, replica failover, service remoting, and Reliable Collections through a capacity-aware workload lifecycle engine.

C#Azure Service FabricDistributed SystemsMicroservices

Designed an intelligent, capacity-aware routing engine with dynamic rebalancing for highly available worker nodes.

Capacity Manager Workload Router

A Spring Boot control-plane that tracks capacity units across simulated worker nodes, routes incoming workloads to available capacity, and rebalances on node failure.

JavaSpring BootControl PlaneDistributed Systems

Backend · Event-Driven Architecture

Kafka Production Patterns

Architected robust, production-ready Kafka consumers using exactly-once semantics and comprehensive DLQ error handling.

A Staff-level reference repository demonstrating production-grade Kafka patterns in Java and Spring Boot. Includes implementations for Idempotent Consumers, Exactly-Once Semantics (Transactional Outbox), Dead-Letter-Queues (DLQ), and Consumer Lag Observability.

JavaSpring BootKafkaDistributed SystemsDLQ

End-to-end automated PR reviews with bounded LLM tool-use loops and production-grade guardrails.

AI-Assisted Workflow Automation Agent

AI agent that automates pull request review end-to-end. A bounded, guarded tool-use loop reads from GitHub, reasons with an LLM, and posts structured findings. Built with Spring Boot and Spring AI, featuring allow-listed tools, webhook signature verification, idempotency, circuit breakers, token and cost budgets, a durable job queue, and full tracing.

JavaSpring BootSpring AILLM AgentsGitHub APIPostgreSQL

AI Infrastructure · Event-Driven

Event-Driven AI Agent Orchestration Platform

Kafka-native AI agent orchestration with exactly-once processing and distributed LLM decision tracing.

Event-driven platform where business events flow through Kafka and LLM-powered agents classify, summarize, route, and act. Production rigor with idempotent consumers, DLQ, circuit breaker, retry with backoff and jitter, token budgeting, backpressure, and distributed tracing of every agent decision.

JavaSpring BootApache KafkaSpring AILLM AgentsPostgreSQL

Daily Contributions

05 - Open Source

Contributions to the community.

★ Open Source · Core Contributor

Apache Fineract

Active contributor to Apache Fineract - the core banking platform powering financial services in emerging markets. Migrated 15+ integration tests from RestAssured to type-safe Feign clients across loan, client, and savings-account modules via 5 merged PRs (#5658, #5659, #5668, #5670, #5675), eliminating manual HTTP boilerplate and reducing CI pipeline failures.

Merged PRs

Active

Contributor

$ git log --author=Dpk376

feat: Feign client migration - loan module

feat: Feign client migration - savings module

fix: CI pipeline stability

refactor: RestAssured → type-safe Feign

→ 5 PRs merged to develop

★ Open Source · Contributor

OpenHands

Contributor to OpenHands (77k+ stars) - an open-source AI-powered software development agent. Traced and fixed a pagination bug in the V1 app-server git endpoints where an off-by-one page window (per_page = limit + 1) silently dropped one item at every page boundary; corrected the page-windowing logic and search next-page handling, backed by rewritten unit tests asserting every item is seen exactly once across pages.

77k+

Stars

Bug Fix

Pagination

View OpenHands

$ git log --oneline

fix: pagination off-by-one in git endpoints

fix: per_page = limit + 1 dropping items

test: rewrite pagination unit tests

test: assert each item seen exactly once

→ page-windowing logic corrected

★ Open Source · Contributor

Apache Kafka

Contributor to Apache Kafka. Added long-missing regression coverage and established dedicated API-level testing suite protecting KStream API generic contracts (KAFKA-8035). Increased unit test coverage, validated JSON paths and removed dependency on embedded brokers for faster CI execution (KAFKA-13716). Wrote first-ever pure unit tests for ToolsUtils shared utility class covering all 5 public methods (KAFKA-20692).

Merged PRs

Testing

Focus

$ git log --author=Dpk376

test: regression coverage for KStream API

test: ToolsUtils shared utility pure unit tests

test: remove embedded brokers dependency

→ merged KAFKA-13716, KAFKA-8035, KAFKA-20692

★ Open Source · Contributor

Spring AI

Contributor to Spring AI — the Spring ecosystem's official AI/ML integration framework. Fixed locale-sensitive toLowerCase()/toUpperCase() calls that broke Pinecone filter operators and OpenAI protocol values under Turkish/Azerbaijani JVM locales (the 'Turkish İ' bug). Hardened i18n correctness across the Pinecone vector store and OpenAI modules with Locale.ROOT, preventing silent production failures in multi-locale deployments.

PRs

i18n

Focus

deepakpersonal376@gmail.com

$ git log --author=Dpk376

fix: Locale.ROOT for Pinecone filter operators

fix: Locale.ROOT for OpenAI protocol values

bug: Turkish İ breaks toLowerCase()

→ i18n hardening across 2 modules

06 - Research

Academic publications.

Research Paper· Published · Zenodo 2026

MetaPlay - Decentralized Content Platform Architecture

DOI 10.5281/zenodo.19161365 · 1st place TCS TACTICS 2022 (287 participants)

Backend architecture for a decentralized content platform on Ethereum - participants create and consume content with no central authority. IPFS for tamper-proof storage, Polygon L2 for 65,000 TPS throughput, and The Graph for efficient on-chain querying, with DAO governance and tokenized creator incentives.

1st

Place (TCS)

287

Participants

Read on Zenodo

→ Abstract: Decentralized Content

• IPFS for tamper-proof storage

• Polygon L2 scaling (65k TPS)

• The Graph for on-chain queries

• DAO & creator tokenomics

✓ Published via Zenodo

05 - Beyond the terminal

What keeps me curious.

Video Games

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.

Gaming Profiles

Steamdpk376

RockstarDPK7308

ValorantI T A C H I #DPK

UbisoftDPK7308

EADPK7308

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.

Artemis ProgramStarshipVoyagerJames Webb Space TelescopeOrbital Mechanics

Quantum Computing

Where classical computing meets its limits. I follow breakthroughs from IBM, Google and academia as the next wave of computation takes shape.

Qubits & SuperpositionShor's AlgorithmTopological Quantum ComputingError Correction

06 - Contact

Let's build something
that scales.

Open to senior backend & platform engineering roles, open-source collaboration, and conversations about distributed systems done right.

Send an email GitHub LinkedIn

Software Development Engineer II

DEEPAK KUMAR

Designing & scaling resilient distributed systems.

Distributed Systems
High Scale
Reliability
Backend & Infra

View Selected Work Résumé

01 - About

A senior engineer who treats distributed systems as craft.

deepakpersonal376@gmail.com Chennai, India +91 86677 68959

Software Engineer with expertise in building large-scale distributed systems and reactive microservices, spanning supply chain automation at Flipkart and enterprise-grade financial platforms at TCS.

Scale & Performance: Built core platform components at Flipkart achieving a 3.7x throughput increase and reduced PostgreSQL lock wait times by 95% via atomic claim-first processing.
Enterprise Architecture: Architected event-driven microservices for the ASX CHESS Replacement at TCS (A$3.3T equity market), handling 20M+ events/day with exactly-once Kafka guarantees.
Operational Excellence: Owned full SDLC for critical systems, deploying 350+ real-time alerts and leading multi-engineer teams through production rollouts.
Open Source: Active Core Contributor to Apache Kafka, Apache Fineract, Spring AI & OpenHands.

Years experience

Microservices led

Market participants

Education

M.C.A · Computer Science

SASTRA University

CGPA 8.5

B.Sc · Computer Science

Sri Krishna Arts & Science College

CGPA 8.0

Certifications

AWS Solutions Architect

Amazon Web Services

2026

Azure Developer Associate

Microsoft

2026

GitHub Copilot Certified

GitHub / Microsoft

2026

Anthropic AI & Agent Development

Anthropic

2026

02 - Experience

Five years of shipping production systems.

June 2026 - PresentSoftware Engineer IIFlipkart

Core Systems & Infrastructure

Backend · Supply Chain Automation

Designed and built large scale distributed applications from the ground up, engineering extensible solutions and reactive microservices to achieve a 3.7x throughput increase on a core Java platform.
Solved complex architecture and business problems using fundamental algorithms and system design, optimizing distributed NoSQL data stores and PostgreSQL to reduce lock wait times by 95% via atomic claim-first processing (FOR UPDATE SKIP LOCKED).
Owned the full software development life cycle (SDLC) for critical supply chain automation components, writing high quality code that is modular, functional and testable to deploy 350+ real-time alerts.

JavaDistributed SystemsPostgreSQLNoSQLRedisMicroservicesSystem DesignAlgorithms

May 2022 - Feb 2026Senior Backend EngineerTata Consultancy Services

ASX CHESS Replacement Program

Lead · Distributed Clearing & Settlement Platform

Reduced consumer lag 75% and sustained sub-200ms p99 latency by engineering high-volume Kafka event-driven services processing 5M+ events/day with exactly-once delivery via idempotency keys and manual offset commits, powering a multi-channel notification platform.
Drove large-scale system design and end-to-end delivery of 4 distributed microservices on the ASX CHESS Replacement - a national clearing platform serving 100+ market participants benchmarked at 20M+ trade settlement events/day.
Served as ASX client's primary technical contact over a 14-month cross-geo engagement (Chennai–Sydney); independently delivered 25 user stories, resolved 73 client-reported defects through UAT cycles, and shipped SAML SSO integration with zero-downtime operations.
Cut average API response latency 40% (from ~800ms to ~480ms) by designing and building 15+ scalable REST APIs in Java and Spring Boot with query indexing, pagination, and performance tuning - consumed by internal platform services and external broker-facing systems.
Eliminated recurring JVM OutOfMemory failures across 60+ production deployments in 30+ environments by building a Kafka stress-testing framework benchmarking throughput, consumer lag, and latency with Prometheus and CloudWatch.
Mentored and led a 4-engineer team through code reviews, design reviews, and production release ownership; 2 mentees earned TCS internal awards.
Saved ~15 hours per rollout by building 6 shell-script automation tools for SAML, SCIM, and TLS configuration; automated 600+ system-code SQL queries and drove adoption across 4 teams.

JavaSpring BootApache KafkaPostgreSQLAWSSAML SSOPrometheusDocker

May 2021 - May 2022Systems EngineerTata Consultancy Services

Engineering Education & Platform Tooling

Backend · Training & Automation

Trained 500+ engineers by designing and delivering 3 technical courses in Java backend development across TCS learning platforms (FrescoPlay, iEvolve); authored 50+ DSA coding challenges powering weekly internal hackathons.
Enabled on-demand hackathon setups across the organization by automating provisioning of backend lab environments on Nuvepro with install scripts that auto-configured environments on assessment launch.

JavaSpring BootShell ScriptDSA

03 - Capabilities

The stack, by domain.

A1 Languages & Fundamentals

Java

Python

Shell Script

DSA & Algorithms

A2 Distributed Systems & Architecture

Spring Boot

Large-Scale System Design

Reactive Microservices

Extensible Solutions

Event-Driven Architecture

REST APIs / gRPC

A3 Messaging & Streaming

Apache Kafka

Exactly-Once Processing

Consumer-Lag Optimization

A4 Cloud & Infrastructure

AWS Infrastructure Services

Azure

Docker / Kubernetes

Serverless Computing

Supply Chain Automation

CI/CD

A5 Databases & Observability

PostgreSQL

MySQL

Distributed NoSQL (DynamoDB/Redis)

Prometheus / CloudWatch

A6 Software Engineering & Security

Bulletproof Code & Full SDLC

Modular / Functional Code

Operational Excellence

OAuth2 / JWT / SAML / SCIM

A7 AI Integration

Generative AI Solutions

Prompt Engineering

Agent Development

Claude / LLMs / MCP

04 - Personal Projects

Technical systems & personal builds.

★ Backend · Distributed Systems

A curated collection of production-quality Ethereum smart contracts - DeFi primitives, access-control patterns, upgradeable proxies and gas-optimized data structures for enterprise DApp development.

SolidityEthereumJavaScriptDeFi

Frontend · E-Commerce

Purple Creation

Delivered a high-performance, visually engaging corporate landing page to drive global B2B apparel leads.

Production-ready Next.js 14 website for a premium apparel manufacturing company. Built with Tailwind CSS, Framer Motion, Spline 3D integrations, and a fully functional contact system via Resend.

Next.jsTailwind CSSFramer MotionSpline 3DResend

Frontend · Finance

K.B. Associates

Modernized the digital presence for a regional financial consultancy with SEO optimization and lead-capture forms.

Next.jsTypeScriptFramer MotionTailwind CSS

Backend · Architecture

Qubits Of DPK

Created a master reference guide for production-grade coding practices, strict encapsulation, and test-driven verification.

A comprehensive Java repository covering Object-Oriented Design, SOLID principles, Multithreading, and Design Patterns. Refactored to meet Google-level readability and engineering standards.

JavaOOPSOLIDDesign PatternsMultithreading

Backend · Security

Enterprise RBAC Gateway

Secured enterprise microservices with edge JWT validation and OPA dynamic authorization.

JavaSpring CloudOPAPostgreSQLPrometheus

Backend · API Gateway

Rate Limit Control Plane

Engineered distributed per-tenant rate limiting using Redis token buckets and hot-loaded plugins with zero downtime.

JavaSpring BootRedisRate LimitingPrometheus

Engineered a scalable, resilient control plane demonstrating Azure Service Fabric's advanced partitioning and reliable collections.

Orchestra-SF

C#Azure Service FabricDistributed SystemsMicroservices

Designed an intelligent, capacity-aware routing engine with dynamic rebalancing for highly available worker nodes.

Capacity Manager Workload Router

A Spring Boot control-plane that tracks capacity units across simulated worker nodes, routes incoming workloads to available capacity, and rebalances on node failure.

JavaSpring BootControl PlaneDistributed Systems

Backend · Event-Driven Architecture

Kafka Production Patterns

Architected robust, production-ready Kafka consumers using exactly-once semantics and comprehensive DLQ error handling.

JavaSpring BootKafkaDistributed SystemsDLQ

End-to-end automated PR reviews with bounded LLM tool-use loops and production-grade guardrails.

AI-Assisted Workflow Automation Agent

JavaSpring BootSpring AILLM AgentsGitHub APIPostgreSQL

AI Infrastructure · Event-Driven

Event-Driven AI Agent Orchestration Platform

Kafka-native AI agent orchestration with exactly-once processing and distributed LLM decision tracing.

JavaSpring BootApache KafkaSpring AILLM AgentsPostgreSQL

Daily Contributions

05 - Open Source

Contributions to the community.

★ Open Source · Core Contributor

Apache Fineract

Merged PRs

Active

Contributor

$ git log --author=Dpk376

feat: Feign client migration - loan module

feat: Feign client migration - savings module

fix: CI pipeline stability

refactor: RestAssured → type-safe Feign

→ 5 PRs merged to develop

★ Open Source · Contributor

OpenHands

77k+

Stars

Bug Fix

Pagination

View OpenHands

$ git log --oneline

fix: pagination off-by-one in git endpoints

fix: per_page = limit + 1 dropping items

test: rewrite pagination unit tests

test: assert each item seen exactly once

→ page-windowing logic corrected

★ Open Source · Contributor

Apache Kafka

Merged PRs

Testing

Focus

$ git log --author=Dpk376

test: regression coverage for KStream API

test: ToolsUtils shared utility pure unit tests

test: remove embedded brokers dependency

→ merged KAFKA-13716, KAFKA-8035, KAFKA-20692

★ Open Source · Contributor

Spring AI

PRs

i18n

Focus