$ tail -f siddik.log
Notes from systems
that have to hold.
Software engineer at Paygasus. I build backend systems designed to perform under pressure - scalable cloud-native architecture with intelligent, agent-driven workflows. This is where I write about it. More about me →
──2026
Designing Multi-Tenant Fintech Backends with Fastify and Cloud Spanner
What a year of building a payments platform taught me about tenancy, isolation, and boring reliability
read entry
What Building a RAG Pipeline Taught Me About Search
DocuChat, chunking strategies, and why retrieval - not the LLM - decides whether your answers are any good
read entry
──2025
Squeezing 22% More Accuracy from E-commerce Recommendations with XDeepFM
The story behind my IJTE paper: why explicit feature interactions beat deeper networks for recommendation
read entry
Is MERN Still Relevant in the Age of AI!?
Why I chose MERN to start my journey
read entry
About Siddik Mulla
Software engineer at Paygasus building multi-tenant fintech infrastructure. Previously full-stack at Comtranse Technology. Published in IJTE 2024 on recommendation systems. Writes here about backend architecture, RAG/LLM pipelines, and ML in production.