Domain-driven design (DDD) provides many techniques and patterns to tame complexities in software applications — even when those are written in functional languages. Unfortunately, there are very limited resources when it comes to implementing DDD in functional languages. …

Couple of months back, I was listening to Eric Evan’s pod cast on Software engineering radio where he mentioned that actor model is a great fit for modeling aggregate root in domain driven design, I was like what, wait? …

Most compelling reason for data normalisation is to eliminate update anomalies. but, what if updates are not allowed in database, would you still normalize your data ? Let’s say, there is a company, which sells car. Car price has a component called “pickup cost”. This pickup cost has two components…

Take simple Ideas seriously Lot of complex systems have very simple idea behind them. Many scientific breakthrough are just about finding these simple idea in such complex systems. Our understanding increases leaps and bounds if we dwell deep enough in these seemingly simple things. Often we only do this when we struggle with a…

Three mental models In any software, there are at least three mental models at play. First, is the user’s mental model, her understanding of how the software works. Second, Domain expert’s mental model of how Software should work and lastly, developer’s mental model of how the software actually works. …

Developers and management are obsessed with measurement. Important things, many times, are not qualitative. But, when we insist on measuring, We end up measuring unimportant things. For example, companies that don’t understand their customers become feature factories. For them, quantity becomes a proxy to measure value. An extreme example of…

I wanted to add headers to an HTTP request, in Scala. Soon Realised, I can’t create them — instead, I needed to parse them. Once I did that, it returned me headers in a monadic type, which I then needed to unwrap with pattern matching. Oh boy! this was complex…

We all claim to like Simplicity Yet, It is the complexity that adds richness, nuances, depth, and beauty to our life. What makes a drawing more than just its separate lines? How is a personality more than a set of traits? In what way is a culture more than a mere collection…

When people focus only on the outcomes, they have no incentive to break from the norm. They would follow the same patterns that have led to success in the past. They are more likely to take the shortest route to success. With outcome accountability, people invest only in things with…