Resume

Principal Software Engineer

hello@ismael.co · GitHub · LinkedIn

Principal Software Engineer obsessed with how software feels to use, building at the front of the AI shift. I architect production AI systems end to end, agent-first, with security and observability built in. I start with structure, cut without mercy, and ship the few things that earn their place.

Recent technical work

Mechanistic interpretability

Work on model internals: attribution, features, and using those findings to debug and constrain production behavior.

Guardrail architecture

Design of guardrail systems for production models: policy, evals, and runtime checks for behavior that is hard to specify in advance.

Agentic architecture

Architecture for agent systems: tool use, orchestration, and control of software that acts.

Evaluation harnesses

Evaluation harnesses and evals for production model systems. Correctness, regression detection, and safe behavior in non-deterministic environments.

Fine-tuning & model training

Fine-tuned models for production use cases. Trained embedding-based models and BERT classifiers for domain-specific tasks, including data pipelines, training loops, and evaluation.

Security instrumentation for modern workflows

Built sensors and analysis systems for developer toolchains and agent-driven workflows, catching supply-chain and behavioral risks that standard tooling misses.

Experience

Principal Software Engineer

Health tech, Fintech, e-commerce · ~4 years

Led end-to-end product development and architected scalable systems. Mentored teams and focused on intuitive interfaces backed by solid engineering fundamentals and measurable reliability.

Head of Engineering

Event tech, SaaS, Crypto · ~2 years

Defined technical strategy and built high-performing teams. Established engineering principles and practices that improved quality, velocity, and cross-functional execution.

Senior Product Manager

Big Tech, e-commerce · ~3 years

Defined product strategy and built teams. Launched developer-facing products and scaled them to thousands of users while maintaining strong engineering standards.

Senior Software Engineer

Big Tech, Tech startups · ~9 years

Delivered critical features in large-scale systems. Built low-level hardware-centric abstractions, improved performance and reliability, and collaborated with design and product to ship polished solutions.

Founder

Security, developer tools, model systems · ~5 years

Built and sold multiple companies spanning security, developer tooling, and model-driven systems. Led engineering and product, shipped production pipelines and instrumentation.

Capabilities

Leadership & architecture. System architecture, Technical strategy, Distributed systems at scale, Platform & API design, Team building & mentorship, 0-to-1 product, Engineering org design, Cross-functional leadership

AI engineering. LLM applications, Agentic architecture, Agent systems, Tool use & function calling, MCP, RAG, Evals, Guardrail architecture, Mechanistic interpretability, Prompt engineering, Context engineering, Orchestration, Inference optimization, Streaming & token budgeting

Intelligent systems. PyTorch, Fine-tuning, Evaluation harnesses, Guardrails & evals, Embedding models, BERT, Training pipelines, Domain adaptation, Vector search, Model observability

Security & verification. Security instrumentation, Supply-chain analysis, Digital forensics, Pentesting, Malware analysis, OpsSec, Behavioral detection

Systems & infrastructure. Kubernetes, Docker, Terraform, GCP, AWS, CI/CD, Observability, Kafka, PostgreSQL, Distributed systems, Scalability & reliability

Languages & craft. TypeScript, Python, Rust, Go, Swift, C, WebAssembly, API & platform design, Performance engineering, Design systems, Product sense

Education

Engineering

Computer Science

Technologist

Embedded Systems Design

Art Direction

Applied Arts

Additional Details

Languages. English, Spanish, French

Interests. Product design, systems engineering, model training, mobile development, cybersecurity, film photography, UX research.