Nathaniel Mapaye

Santa Cruz, CA

Nathaniel Mapaye

Software Engineer

Building reliable systems across C++ concurrency, embedded FreeRTOS, and React Native UX.

Get in touch Resume (PDF) GitHub
Portrait of Nathaniel Mapaye

About

I’m Nathaniel Fransiscus Mapaye, a Technology & Information Management student at UC Santa Cruz who likes building things close to the metal and shipping them all the way to a clean UI.

My work spans low-level C++ concurrency and embedded FreeRTOS firmware up through cross-platform React Native apps — with a recurring detour into security testing and remediation.

Projects

AURORA

Aug 2025 — Present

React Native Caffeine Tracker

An iPhone and iPad app connecting caffeine timing, sleep, and alertness. It supports manual logging, optional, read-only Apple Health sleep import, a 60-second vigilance test, and private on-device insights persisted with MMKV.

  • React Native
  • TypeScript
  • HealthKit
  • MMKV
  • Zustand
Case study ↗ Live demo ↗

EmbNode

Aug 2025 — Sep 2025

FreeRTOS Telemetry Node (ESP32/STM32)

DMA sampling pipeline with a high-priority sampler, aggregator, MQTT/HTTP comms, OTA, watchdog, and deep-sleep scheduling; host-sim via CMake/CTest. CRC16-CCITT reference pass and telemetry decode; modeled avg current 0.15 mA with 15 s sleep; 100% tests passing.

  • C++23
  • FreeRTOS
  • ESP32/STM32
  • MQTT
  • CMake/CTest
Repo ↗

GitOps

SLO-driven Canary Operator

Go-based Kubernetes Operator for SLO-driven canaries; integrated Prometheus + Gatekeeper policies; automated rollback in <30s on p95 regression.

  • Go
  • Kubernetes
  • Prometheus
  • ArgoCD
Repo ↗

SysLib

Header-only C++23 concurrency library

SPSC at 26,987,335 ops/s on Apple M-class (~37 ns/op p99). Lock-free MPMC (Michael–Scott + epoch reclamation); verified with ThreadSanitizer and linearizability checks.

  • C++23
  • Atomics
  • Lock-free
  • TSan
Repo ↗

Experience

  1. AI Fellow · Handshake

    Apr 2026 — Present

    Remote / Contract

    • Evaluate paired AI responses for correctness, completeness, clarity, and usefulness; produce structured grading rationales identifying concrete strengths, failure modes, and edge-case issues.
    • Review complex software-codebase tasks by inspecting repository behavior, diffs, tests, and implementation logic; help refine bug fixes and validate whether proposed changes match task requirements.
    • Work across AI evaluation and software analysis workflows requiring careful judgment, technical reading, and concise documentation under task-specific rubrics.
    • Git
    • GitHub
    • Python
    • C++
    • AI Evaluation Rubrics

  2. Linear Algebra Tutor · UCSC ACE

    Jan 2026 — Apr 2026

    Santa Cruz, CA / Hybrid

    • Tutored students in linear algebra through guided problem-solving — systems of equations, matrix operations, vector spaces, linear transformations, eigenvalues, and diagonalization.
    • Led collaborative review and practice sessions focused on exam prep, homework strategy, and conceptual gaps; helped students move from memorized procedures toward step-by-step reasoning.
    • Adapted explanations to different skill levels and encouraged consistent study habits in a seasonal academic role.
    • MATLAB
    • LaTeX
    • Python

  3. Data Center Engineering Intern · Bitera D.C

    Aug 2025 — Sep 2025

    Jakarta, Indonesia

    • Closed high-severity web vulns on public/client portals via authenticated testing and coordinated fixes, eliminating open CVSS ≥ 9 exposures within SLA windows; filed advisories and verification steps.
    • Authored incident postmortems and SOPs adopted by ops, cutting handoff time and tightening audit readiness; standardized runbooks across power/cooling/network checks.
    • Performed rack/stack, power, cooling, cabling, and alarm clearing to protect SLA uptime across sites.
    • Burp Suite
    • Linux
    • Git
    • LibreNMS
    • Markdown SOPs

  4. Cyber Security Analyst Intern · Xapiens Teknologi Indonesia

    Jul 2024 — Sep 2024

    Tangerang, Indonesia

    • Ran authenticated scans and manual tests; verified exploitability and drove remediation on prioritized CVSS ≥ 8 findings across client estates.
    • Produced PoC-backed remediation reports with status tracking through implementation; improved closure rates and reduced re-open defects.
    • Nessus
    • Burp Suite
    • OWASP Testing Guide
    • TCP/IP
    • Jira

Education

University of California, Santa Cruz

Jul 2023 — Jun 2027

B.S., Technology & Information Management (TIM)

Santa Cruz, CA

  • Undergraduate Dean’s Scholarship Award
  • Bilingual International Baccalaureate Diploma

Skills

Languages

  • C++23
  • Go
  • TypeScript / JavaScript
  • Python
  • Java
  • Lua

Systems & Embedded

  • FreeRTOS
  • ESP32 / STM32
  • Atomics
  • Lock-free structures
  • Linux

Infra & DevOps

  • Docker
  • Kubernetes
  • ArgoCD
  • Helm
  • Kustomize
  • Prometheus
  • GitHub Actions
  • REST

Security & Testing

  • Burp Suite
  • Nessus
  • OWASP TG
  • ASVS mapping
  • CVSS triage
  • CMake/CTest
  • k6
  • envtest
  • kind

Contact

Open to internships and new-grad roles in systems, embedded, and full-stack engineering. The fastest way to reach me is email.

nmapaye@ucsc.edu LinkedIn GitHub Resume (PDF)