← Back to command centerEngineering Notes
Short, high-signal writeups about what Marco built, how he thinks through engineering problems, and what each project says about the kind of teammate he is.
2026-05-06•Developer Tools•6 min read
The Code Interview Platform is developer tool proof. It combines Monaco Editor, Stream video and chat, Clerk auth, MongoDB session records, Inngest lifecycle handling, and Piston code execution into a workflow that resembles an actual interview session.
engineering signal
- • Combined editor, video, chat, auth, sessions, and code execution into one workflow
- • Used Stream, Clerk, MongoDB, Inngest, and Piston without hiding the coordination cost
- • Built around interview session behavior instead of only embedding an editor
2026-05-06•Realtime Systems•5 min read
The messaging platform is useful portfolio proof because it moves beyond static pages. It has live events, authenticated sessions, persisted conversations, image messages, presence state, and UI behavior that has to stay coherent while the system changes.
engineering signal
- • Built product behavior across React, Express, Socket.IO, MongoDB, and Cloudinary
- • Handled live presence, message persistence, authentication, and image sharing together
- • Used optimistic UI while still reconciling with server responses and error states
2026-05-06•Client Delivery•5 min read
Saguaro Blossoms matters because it is not a toy app. It is a production business site where polish, copy structure, contact reliability, SEO metadata, and deployment discipline all matter together.
engineering signal
- • Delivered a production site for a real tutoring business
- • Connected SEO structure, contact intake, email delivery, and custom domain deployment
- • Handled launch QA across content, layout, forms, metadata, and public URLs
2026-05-06•AI Product Engineering•5 min read
AI Image to Audio is the strongest technical proof on the portfolio because it turns an AI API chain into a focused user workflow: upload an image, generate a useful description, and return spoken audio that can be played or downloaded.
engineering signal
- • Connected multimodal image analysis and speech generation into one usable flow
- • Kept provider credentials behind server API routes instead of exposing them to the browser
- • Handled generated MP3 audio as a real product response, not just text output
2026-05-06•Portfolio Engineering•5 min read
I added a maintainable writing area to the portfolio so engineering notes can ship regularly while staying structured, reviewable, safe for a production Next.js site, and honest about agent assisted workflow without exposing private operations.
engineering signal
- • Added a structured JSON writing workflow instead of hardcoding posts into React components
- • Kept publishing reviewable through draft and approval states
- • Used build time validation so bad content fails before it reaches the live site