About / Rahiyan Safin

Engineering for
real-world scale.

I am a Senior Software Engineer based in Dhaka, Bangladesh, with 8+ years of experience designing scalable software for enterprise SaaS, manufacturing, fintech, and healthcare. My core expertise lies in the Java/Spring Boot and C#/.NET ecosystems.

Currently, I work on SaaS platform engineering at JustGo. I specialize in distributed backend services, event-driven systems with Kafka and RabbitMQ, cloud-native workloads on Azure and GCP, and the reliability practices that keep enterprise systems understandable under pressure.

Beyond implementation, I care about sound architecture decisions, thoughtful code reviews, mentoring engineers, automated testing, and creating systems that other teams can confidently maintain. I also lead private workshops, deep-dive sessions, and architecture consultation for teams working on distributed and cloud systems.

HOW I THINK
“A clean diagram is not the architecture. The architecture is what the system does when a dependency is late, a message repeats, or a rollout goes wrong.”

Reliability before novelty.
I prefer well-understood tools, explicit guarantees, and designs that remain legible during an incident.

Trade-offs in writing.
A decision is easier to review when the constraint, rejected options, and cost are visible.

Operations are part of design.
Deployment, observability, recovery, and ownership belong in the first conversation.

Working set

Where I contribute.

01

Enterprise backends

Service boundaries, APIs, background work, failure recovery, and systems designed for long-term maintainability.

JavaSpring Boot.NETC#GoREST
02

Events & data

Partitioning, consumer behavior, replay, idempotency, schemas, and choosing a broker for the delivery semantics you actually need.

KafkaRabbitMQService BusDebeziumSQLNoSQL
03

Cloud engineering

Azure and GCP systems with security, observability, CI/CD, infrastructure, and operability treated as design inputs.

AzureGCPDockerKubernetesTerraformCI/CD
Organization network

Direct work.
Selected contributions.

A clearer view of named product work and additional organizations supported through different engineering delivery relationships.

01
Professional contribution

Products and systems I have worked on

Organizations and products supported through direct engineering work. Details remain broad where the underlying work is private.

02
Selected contribution network

Organizations I have contributed to

Selected organizations I have supported through private and confidential professional engagements.

  • SSW Consulting
  • SVT Robotics
  • Shine Solutions
  • Neolution
  • JTL Software
  • NovoTX
  • Eximia
  • SOFTURE
  • jambit
  • BC Government
  • TimeWarp Engineering
  • NetCorePal
  • Kiss Consulting
  • Wavekit
  • divergent
  • Sent.dm
  • Tricloud
  • KOMED Health
  • Yumpingo
  • Facile.it
  • ShopBack
  • ottonova
  • remberg
  • Novu
  • Swetrix
Relationship note

These organizations represent private and confidential engagements across contract work, independent consulting, staff augmentation, and product delivery, governed by contractual obligations and NDAs.