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Terrero Labs

Resume

Also available on LinkedIn.

Jonathan Terrero

Fort Myers, FL · jterrero16@outlook.com · linkedin.com/in/jonathan-terrero · github.com/jonnyterrero

Experience

Software Engineer I · OmniFlex Fitness · Naples, FL — Remote

May 2026 – Present
  • Develop and ship production features across OmniTask (Angular/TypeScript task platform) and OmniTrivia (real-time multiplayer trivia) using TypeScript, Angular, Firebase/Firestore, and Flutter, supporting active users across web and cross-platform mobile clients.
  • Built batched Firestore write pipeline and typed data-access layer with writeBatch bulk ops, OnPush change detection, and takeUntilDestroyed subscription hygiene, reducing Firestore read/write cost per session by 10% and eliminating a class of subscription-leak concurrency bugs.
  • Implemented peer code review and PR-based Git/GitHub workflow with typed return contracts, cycle-detection utilities, and DRY shared modules, and collaborated with founders and mobile team to ship OmniTask feature releases and OmniTrivia multiplayer WebSocket rollout on a weekly release cadence.

Education

Florida Gulf Coast University — Fort Myers, FL

Bachelor of Science in Biomedical Engineering | Minors: Physics, Computer Science

May 2027

Florida SouthWestern State College — Fort Myers, FL

Associate in Arts, Focus: Bioengineering and Biochemistry

December 2023

Relevant Coursework

Physiology for Engineers I & II · Biofluid Mechanics (BME 3261C) · Biomechanics · Bioperformance of Materials · Medical Instrument Architecture · Biomedical Signal Models · Intro to Mechatronic Design · Design for Manufacturing (EGN 3433C) · Circuits · Signals & Systems

Projects

HeartWire — Health-Tech Startup (MindMap, GastroGuard, HeartWire OS, SkinTrack+) · Next.js, TypeScript, Supabase, Python

Summer 2025 – Present
  • MindMap: behavioral health tracker with an atomic, idempotent daily check-in RPC, per-user row isolation enforced by database RLS policies (with a SQL cross-user isolation test suite), server-side AES-256-GCM envelope encryption for journal text, and an offline Python ML layer (calibrated logistic regression with abstention and an output-safety gate) evaluated on synthetic data.
  • GastroGuard: GI symptom and meal logging PWA with a hybrid rule-based and correlation trigger engine; tested with 10 users over ~1 month. Designed a vendor-neutral ingestion interface for external health-platform data (HRV, sleep); not yet connected to a live source.
  • HeartWire OS: study app built on Next.js, Prisma, and PostgreSQL, organising courses, typed resources, and levelled project ideas across engineering domains.

Robotic Pick-and-Place Arm (2-person team) · Arduino (C/C++), Servo Control, Colour Sensing, Ultrasonic Ranging, FSM

Spring 2026
  • Wrote all firmware for a 4-servo arm on an Arduino Uno; the brief specified behaviour only. Built a non-blocking FSM controller for human-to-robot handover with a median + EMA filtered ultrasonic sensor, a grip check with retries, and a STOP_HAND proximity override that halts motion when anything comes within 8 cm.
  • Implemented runtime colour classification: photoresistor readings under R/G/B LED illumination matched to per-session calibrated references by nearest distance, accepted only after three stable reads.
  • Wrote a closed-form inverse-kinematics solver (law of cosines with wrist-point approach, rejecting unreachable targets before any servo command); the final sort used calibrated joint-space poses stored in EEPROM. Joint actuation is open-loop position command.

Modular Knee Brace · SolidWorks, Fusion 360, Arduino, FSR Sensors, Python

Spring 2025 – Present
  • Phase 1: instrumented brace prototype measuring brace–limb interface pressure distribution with an FSR array, used as a proxy for load transfer through the brace; built signal conditioning, a calibration routine, and Python gait-cycle visualisations.
  • Ran linear static FEA in SolidWorks Simulation: the critical connector reached a minimum factor of safety of 1.68 at 3 lbf against a 2–4 target, so I documented the design as not yet safe and identified connector and hinge geometry changes.
  • Phase 2: rebuilt the design as a parametric 10-part Fusion 360 assembly (frames, lofted connectors, snap-fit hinge) with fit checked at every joint.

Quantitative Physiology Models · MATLAB, Simulink, JavaScript, Plotly.js, GitHub Pages

2025 – 2026
  • Modelled cardiovascular (Windkessel, left-heart pressure–volume loops), metabolic (glucose–insulin OGTT, Type 1/2 diabetes, metformin pharmacokinetics), cellular, and Hodgkin–Huxley neural physiology as ODE systems in MATLAB/Simulink.
  • Ported all seven models to interactive browser simulations that reuse the source equations, parameters, and numerical schemes, deployed at jonnyterrero.github.io/Human-Physiology-for-Engineers.

BME Visualizations · HTML, JavaScript, Chart.js, Python, GitHub Pages

2025 – Present
  • Built a public catalog of interactive computational models for five FGCU biomedical engineering courses, deployed at jonnyterrero.github.io/BME-Visualizations.
  • Models cover blood rheology and capillary rise, instrument signal-chain architecture, signal loading/CMRR/noise, sagittal-plane knee torque, and biomaterial response.
  • Each dashboard is parameter-driven, so governing equations can be swept and reconstructed rather than presented as static lecture slides.

Technical Skills

Languages:
Python, TypeScript, JavaScript, C, C++, SQL, MATLAB
Frameworks & Libraries:
React, Next.js, Angular, FastAPI, Django, Flutter, scikit-learn, Pandas, NumPy, Matplotlib
Databases & Data:
PostgreSQL, SQLite, Firebase / Firestore, Supabase, data cleaning, CSV/JSON pipelines, statistical visualization
AI & Agents:
Claude Code Skills, Claude API, OpenAI API
Hardware & Engineering:
Arduino, Sensor integration, PCB design, breadboarding, microcontroller programming, SolidWorks, Fusion 360, 3D printing
Tools & Platforms:
Git, GitHub, Linux, Vercel, Docker, VS Code, Excel

Leadership & Activities

  • Treasurer · National Society of Black Engineers (NSBE)
  • Head of Development · Collegiate 100
  • Member · Biomedical Engineering Society (BMES)
  • Member · Florida Engineering Society (FES)
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