Mark is a full-stack engineer who pivoted from firefighting into software development, bringing discipline and high-pressure problem-solving to architecting AI-powered developer tools. He specializes in shipping production-grade applications that combine modern frontend frameworks with robust backend systems, with proven expertise in performance optimization and code quality automation.
Route to Backend Engineer, Frontend Engineer, Full Stack Software Engineer teams building high-throughput services in the candidate's core stack.
AI/LLM integration (GPT-4, OpenAI API) into production applications. Performance optimization (30% latency reduction, load time improvements). Full-stack development across React, Node.js, Python with secure API design. Code quality automation and technical debt analysis tooling.
DevTools Engineer, Full Stack Engineer, AI/ML Integration Engineer, Backend API Developer.
On-site. Based in San Diego, US.
Targeting $100K+. Currently: Software Engineer.
Recruiter screen → hiring-manager review → technical conversation around AI-powered VS Code extension for technical debt evaluation, Code review leadership, Full-stack performance optimization across multiple applications.
Mark's work in DevTools Engineer, Full Stack Engineer, AI/ML Integration Engineer translates directly into adjacent domains with similar architecture, scale, and reliability needs.
The next pages convert the resume into a reusable proof index: production systems, platform architecture, org-wide pattern ownership, and technical leadership.
This reusable proof index maps common senior/staff engineering requirements to candidate proof. Role-specific addenda extend — not replace — this base matrix.
Requirement: Deliver on ai-powered vs code extension for technical debt evaluation at production scale.
Proof: Architected TypeScript/Node.js/LLM integration reducing manual code review time by 15 minutes per session
Requirement: Deliver on code review leadership at production scale.
Proof: Conducted 5+ code reviews weekly for junior and senior engineers, shipping 5+ full-stack applications
Requirement: Deliver on full-stack performance optimization across multiple applications at production scale.
Proof: Reduced page load times and API response latency by 30% through routing optimization and asynchronous workflows
Requirement: Deliver on qa audit and documentation platform at production scale.
Proof: Built React/Flask/PostgreSQL full-stack system with role-based access control for mission-critical hardware chain-of-custody
Requirement: Ship work that requires ai/llm integration (gpt-4, openai api) into production applications.
Proof: Demonstrated at prior roles.
Requirement: Ship work that requires performance optimization (30% latency reduction, load time improvements).
Proof: Demonstrated at prior roles.
Architected TypeScript/Node.js/LLM integration reducing manual code review time by 15 minutes per session
Conducted 5+ code reviews weekly for junior and senior engineers, shipping 5+ full-stack applications
Reduced page load times and API response latency by 30% through routing optimization and asynchronous workflows
Built React/Flask/PostgreSQL full-stack system with role-based access control for mission-critical hardware chain-of-custody
Mid-level — role fit: adjacent.
Mid-level — role fit: primary.
Mid-level — role fit: secondary.
Mid-level — role fit: secondary.
github.com/MarkAnthonyAlejo — public repositories, contribution activity, and open source project surfaces.
https://gethiringfunnel.com/u/mark-anthony-alejo
Hosted candidate portfolio with positioning, proof points, and conversion kit surface for recruiter routing.
www.linkedin.com/in/mark-alejo-531b7835b
Professional profile and recruiter connection path.
This kit is designed to survive internal forwarding. The fastest next step is a recruiter screen, hiring-manager review, referral handoff, or direct call.
Primary fit: Backend Engineer, Frontend Engineer, Full Stack Software Engineer.
Fastest way to reach Mark — grab a slot on their calendar. HiringFunnel handles the intro.
Persistent candidate surface for routing, resume, and proof surfaces.
Professional profile and recruiter connection path.
Public engineering surface, repositories, and OSS project path.
Additional candidate-owned portfolio and technical writing surface.
Mark Anthony Alejo is a San Diego, US-based Backend Engineer. Mark is a full-stack engineer who pivoted from firefighting into software development, bringing discipline and high-pressure problem-solving to architecting AI-powered developer tools. He specializes in shipping production-grade applications that combine modern frontend frameworks with robust backend systems, with proven expertise in performance optimization and code quality automation. Best fit: Backend Engineer, Frontend Engineer, Full Stack Software Engineer.