Lisbon · building with AI daily

João Silvestre

Senior Lead Software Engineer at J.P. Morgan Workplace Solutions. Fifteen years of .NET, now building with AI agents as a daily colleague.

How I work with AI → Get in touch
João Silvestre 📍 Lisbon
About

Backend engineer at heart.

Banking and payments systems, from SIBS to J.P. Morgan. I like boring, reliable software and the tooling around it. Lately that tooling includes agents.

Stack
C# .NET T-SQL ASP.NET Docker Tailwind Git
AI tooling
Claude Code Agentic workflows Opus & Sonnet Subagents Local models
AI workflow

I steer. The agents do the typing.

I guide, Claude learns and understands, and we iterate on the plan together. That is where the work is. Then it implements and we validate.

01learn02understand03plan04implement05validate
Read the full breakdown →
Projects
psychology-tools

WISC-III evaluation tool

Automates psychology test scoring and reports for practitioners.

ReactASP.NETPWA
(opens in new tab)
f1 experience

F1 experience

A side project for Formula 1 data and fun.

.NETData
(external site)

PlanAhead

A personal-finance planner for budgets, savings, taxes and investments.

Savvori

Grocery price comparison and shopping lists.

HomeOS

A home-management web app for recipes, pantry and meal plans.
See all projects →
Writing
2023 · 12 min

How do CPUs work? Part 1

From transistors to instructions.
2023 · 14 min

How do CPUs work? Part 2

Pipelines, caches and why they matter.

Let's build something.

Find me on GitHub or LinkedIn.

GitHub (external site) LinkedIn (external site)