Hi, I'm Felix Tineo.
Staff Software Engineerfor critical systems.
Technical debt, backend architecture, and scalable products.
I write, build, and think about backend architecture, technical debt, cloud systems, and AI-assisted engineering workflows.

Problems I think about
Where teams get stuck
I focus on software problems that slow delivery, increase risk, or make growth harder than it should be.
Technical debt slowing delivery
Teams ship slower because every change touches fragile code, unclear ownership, or outdated architecture.
Risky releases and fragile systems
Production changes feel expensive because testing, observability, and operational boundaries are weak.
Legacy systems nobody wants to touch
Critical parts of the product work, but the team avoids them because the cost of change is unclear.
Backend architecture that no longer scales
The product outgrew early decisions around data, integrations, APIs, queues, and infrastructure.
AI without a clear engineering workflow
Teams experiment with AI tools but lack repeatable workflows for QA, documentation, analysis, and automation.
Areas of expertise
Senior engineering with judgment
Hands-on engineering authority around systems, tradeoffs, delivery, and risk.
AI-Assisted Engineering Workflows
Practical AI workflows for documentation, QA, codebase analysis, automation, and developer productivity.
Selected case studies
Work on critical systems
Blog






