Short Bio

    Hi, I am Rafiul Alam👋. Welcome to my blog. I was co-founder of Upskill, an EdTech startup that was awarded as one of the best in South Asia multiple times (closed in 2023). I also founded PowerExt - focusing on AI, Productivity, and Web Extensions.

    I have trained LLM models using SFT and RLHF techniques, worked on improving SWE Bench and led such teams for various clients. I spend most of my time coding for my startups and work on other projects which interest me. I have created this blog to share my knowledge mainly in programming, technology and my startup experience.

    📚 Featured Series

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    Go Design Patterns

    Master classic design patterns implemented in Go with practical examples and real-world use cases.

    14+ Patterns • Beginner to Advanced
    Creational Structural Behavioral
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    Go Concurrency Patterns

    Build robust concurrent systems using goroutines, channels, and proven coordination patterns.

    19+ Patterns • Basic to Advanced
    Goroutines Channels Sync
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    Psychology & Behavioral Science

    Understand cognitive biases, decision-making, and human behavior to build better products and make smarter choices.

    20+ Articles • Research-backed
    Biases Motivation Social
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    Unintended Consequences

    Explore how solutions backfire, incentives fail, and well-intentioned actions create opposite outcomes.

    9 Stories • Real-world Examples
    Incentives Experiments Psychology

    📝 Recent Posts

    Latest articles across all topics

    Messaging Systems: A Visual Reference

    How to Read This Post Each scenario shows a diagram first, then a short note on why that system fits best. Complexity increases as you scroll. System …
    Mar 23, 2026
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