Samujjal Majumder

Senior Backend Tech Lead | Distributed Systems | Kotlin, AWS, Kubernetes | Fintech & Crypto

Github: https://github.com/samujjalm Backend Tech Lead with 16+ years of experience building and operating large-scale distributed systems in fintech and crypto. Currently leading backend teams at Trade Republic, owning business-critical platforms used by millions of customers. Over the last 3 years, I’ve led teams responsible for core customer platforms and digital asset infrastructure, with end-to-end ownership from architecture and delivery to production operations. Areas of ownership include: Core Customer Platforms: identity and access management, onboarding and lifecycle workflows, account-related services, and customer communication capabilities Digital Asset Platforms: production-grade wallet and staking systems, integrations with external institutional service providers, multi-asset support, and financial settlement and reconciliation workflows Technical focus: Kotlin, Spring Boot, distributed systems, Postgres, AWS, Kubernetes, Terraform, Snowflake/dbt. I focus on simple architectures, operational excellence, and systems that scale reliably in regulated environments, and I actively leverage AI-assisted development workflows to improve engineering leverage, design quality, and delivery speed while mentoring senior engineers and shaping technical direction across teams.

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