Sushant Kumar

Software Engineer II

Building high-throughput, fault-tolerant distributed backend systems, event-driven architectures & microservices.

Public Repos

Followers

Java Spring Boot Apache Kafka Go C++ Python Kubernetes Docker Helm Keycloak PostgreSQL MongoDB Redis OAuth2 Camunda ELK Stack

National Institute of Technology Sikkim

Aug 2018 – May 2022

Professional Experience

Conology GmbH • Bangalore, India

March 2024 – Present

Architected a dual-format messaging bridge in carrier gateways, decoupling legacy SOAP/WSDL transactions to TMF-compliant JSON via Apache Kafka, reducing p99 latency by 85% (1.2s to <90ms).
Designed a tenant delegation framework decoupling core order-processing logic, reducing client onboarding time from weeks to 2 days.
Engineered real-time Kafka messaging integration on Confluent Cloud (10M+ daily events) with DLQs and idempotency keys.
Designed event-driven platform notification service in Spring Boot/Kafka with MongoDB local caching for sub-second email delivery.
Implemented Keycloak OAuth 2.0 unified security gateway across 15+ microservices.

Enfusion • Bengaluru, India

Jan 2022 – March 2024

Optimized core order processing pipelines for electronic trading platform executing up to 450K daily orders at 99.99% availability.
Redesigned Auto Short Locate validation system and End-of-Day batch processing pipeline scaling ingestion to 300M+ records.
Refactored pre-trade risk check validation service, reducing latency by 90% (5+ mins to <30s).
Built low-latency FIX protocol adapters with custom byte-level message decoding for sub-millisecond order routing.

Implemented RemoveRequiredActionStepProvider to allow admins to remove required actions during workflow execution.
Extended NotifyUser workflow step to support configurable email targets including alternate users and mailing lists.

K3s / k3d Helm 3 Traefik Cert-Manager Argo CD Umami

Architected and deployed a modular, production-grade Kubernetes hosting framework, orchestrating 18+ self-hosted OSS applications across isolated apps, monitoring, and ai namespaces on a single Hetzner Cloud VPS.
Implemented GitOps continuous delivery with Argo CD and a universal reusable Helm chart abstraction — every app deployed via git push with zero manual intervention.
Configured wildcard DNS, automated TLS with Let's Encrypt (Cert-Manager), and Traefik ingress routing with source IP preservation for accurate GeoIP analytics.
Integrated Umami Analytics with N8N automated daily DAU reporting pipeline dispatching metrics to Discord and Instagram.

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