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  Sushant

  Backend Engineer • Distributed Systems & Databases

  I design and implement highly performant, distributed, and resilient backend systems. Currently at Conology GmbH, I focus on building multi-tenant architectures, securing microservices, and orchestrating robust event-driven networks. My technical write-ups focus on system design, database internals, and systems post-mortems.

      Sushant on GitHub Sushant on X Sushant on LinkedIn Send an email to Sushant

Core Specializations

    Distributed Systems & Messaging

    Custom message broker design (Mini-Kafka in Java), Raft consensus engines, and Cassandra anti-entropy database repair algorithms using Merkle Trees.

    Database Engineering & Connection Pooling

    PostgreSQL process-per-connection architecture, HikariCP lock-free ConcurrentBag internals, PgPool HA clustering, and DynamoDB schemas.

    Concurrency & JVM High-Throughput

    Reactive Java programming (Reactor/WebFlux), multithreaded batch processing (300M+ EOD records), and Redis distributed lock patterns.

    Platform Infrastructure & Cloud Native

    Kubernetes persistent storage layers (PV/PVC/SC), OAuth 2.0 / Keycloak multi-tenant secure gateways, and Camunda workflow engines.

Professional Journey

      Conology GmbH

      March 2024 — Present

    Backend Software Engineer

    Focused on multi-tenant core services, integration gateways, and event-driven data streaming. Maintained identity security boundaries and optimized distributed query flows across enterprise platforms.

      Enfusion

      Jan 2022 — March 2024

    Software Engineer (Backend Core)

    Maintained core trading system pipelines and transactional order matching engines. Designed low-latency institutional broker gateways and optimized end-of-day batch processing routines.

> Featured Deep Dives

Detailed architectural write-ups and system implementations.

    December 28, 2025

  Deep Dive: Building a Distributed Message Broker from Scratch

  Designing and implementing a Mini-Kafka message broker from scratch in Java, covering sequential I/O storage, consumer offset tracking, partitioning strategies, and Raft consensus.

    #java #distributed-systems #kafka
    June 1, 2026

  Deep Dive: PostgreSQL Connection Pooling & HikariCP Internals in Spring Boot

  A highly technical masterclass exploring PostgreSQL's process-per-connection architecture, OS socket constraints, HikariCP's lock-free ConcurrentBag internals, and precision performance tuning for Spring Boot.

    #postgres #spring-boot #database
    June 1, 2026

  Why Pgpool-II HA Mode Breaks Camunda 7 in Kubernetes: A Systems Post-Mortem

  A deep-dive analysis of why deploying Pgpool-II in High Availability (Watchdog) mode via Helm charts triggers catastrophic transactional failures and split-brains in Camunda 7 workflow engines.

    #postgres #kubernetes #helm
    December 31, 2025

  Demystifying Merkle Trees: Anti-Entropy in Cassandra and Blockchains

  A deep dive into Merkle Tree internals, their cryptographic validation pathways, and their crucial role in managing distributed database repairs and blockchain block verifications.

    #algorithms #distributed-systems #cryptography

> Recent Technical Notes

Shorter notes on algorithms, quick how-tos, and developer setups.

    Aug 20, 2026

    Apache Kafka on Kubernetes with Strimzi: A Complete Beginner-to-Pro Guide

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    Aug 20, 2026

    Demystifying the Kubernetes Operator Pattern: Custom Resources, Informers, and Reconcile Loops

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    Aug 20, 2026

    How Kubernetes Probes Actually Work: My Takeaways and Mental Models

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  Read All Technical Notes →
    Sushant on GitHub Sushant on X Sushant on LinkedIn Send an email to Sushant
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