I build backend systems.

Hi, I'm Tama, a developer. I spend my time designing and building the systems behind digital products.

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How I Handle Webhook Concurrency in NestJS (Idempotency First, Panic Never)

How I Handle Webhook Concurrency in NestJS (Idempotency First, Panic Never)

January 15, 2026

A practical, production-ready way to handle webhook concurrency in NestJS using idempotency keys, RxJS, Redis locking, BullMQ queues, and event emitters.

Building Secure JWT Authentication with Bcrypt and SHA-256

Building Secure JWT Authentication with Bcrypt and SHA-256

December 28, 2025

Explore a robust authentication flow combining JWT, Redis, Bcrypt, and SHA-256 for secure and scalable multi-session management.

Implementing Role-Based Access Control (RBAC) Based on Use Cases

Implementing Role-Based Access Control (RBAC) Based on Use Cases

December 28, 2025

A framework-agnostic approach to building maintainable and flexible Role-Based Access Control systems using clean architecture principles.

Timeline

Full-Stack Developer
Freelance2025 – Present
B.Sc. in Informatics
University of Technology Yogyakarta2020 – 2024
Computer and Network Engineering
SMK 1 Batang2017 – 2020
How I Handle Webhook Concurrency in NestJS (Idempotency First, Panic Never)

How I Handle Webhook Concurrency in NestJS (Idempotency First, Panic Never)

January 15, 2026

A practical, production-ready way to handle webhook concurrency in NestJS using idempotency keys, RxJS, Redis locking, BullMQ queues, and event emitters.

Building Secure JWT Authentication with Bcrypt and SHA-256

Building Secure JWT Authentication with Bcrypt and SHA-256

December 28, 2025

Explore a robust authentication flow combining JWT, Redis, Bcrypt, and SHA-256 for secure and scalable multi-session management.

Implementing Role-Based Access Control (RBAC) Based on Use Cases

Implementing Role-Based Access Control (RBAC) Based on Use Cases

December 28, 2025

A framework-agnostic approach to building maintainable and flexible Role-Based Access Control systems using clean architecture principles.

Timeline

Full-Stack Developer
Freelance2025 – Present
B.Sc. in Informatics
University of Technology Yogyakarta2020 – 2024
Computer and Network Engineering
SMK 1 Batang2017 – 2020