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Unmesh Joshi

3 articles by Unmesh Joshi.

Performance — DSLs Enable Reliable Use of LLMs

DSLs Enable Reliable Use of LLMs

LLMs generate code incredibly fast, but to ensure they generate exactly what is intended, they need clear boundaries. Abstractions and Domain-Specific Languages (DSLs) provide a strong harness that guides LLMs right from the start. The example of Tickloom - a domain model and DSL for illustrating distributed system behavior - shows how we can use an LLM as a partner to iteratively build a DSL and

UJUnmesh Joshi·July 14, 2026Performance
Engineering — What Is Code?

What Is Code?

Code has two distinct but intertwined purposes. It is a set of instructions for a machine, and it is also a conceptual model of the problem domain. A well designed codebase is a representation of the vocabulary of a domain. These abstractions reveal themselves only as developers build the software. Programming languages act as thinking tools, enabling the construction of a conceptual model that su

UJUnmesh Joshi·May 12, 2026Engineering
Engineering — The Learning Loop and LLMs

The Learning Loop and LLMs

LLMs are useful because they lower the threshold for experimentation. But we have to beware that we don't use them to try to shortcut the learning loop that's an essential part of a software developer's practice. We have seen this problem with tools like low-code platforms, they provide a rapid burst of initial development, but we cannot sustain them because they undermine the learning required fo

UJUnmesh Joshi·November 4, 2025Engineering