Software Engineer × ML Engineer

CajeRodrigues

Full-stack software engineer building intelligent products.

Currently building a real-time net worth platform and an AI-powered powerlifting ecosystem.

About

Engineer across the whole stack

I'm a full-stack engineer based in California (Pacific Time). I build production web and ML systems end-to-end — the frontend a user touches, the APIs behind it, and the models that make it smart. The work below is designed, built, and shipped solo, front to back.

Software Engineering

Full-stack product work — Next.js frontends, FastAPI services, Postgres data models, passkey auth, and native SwiftUI apps. I care about clean seams, real deployments, and interfaces that feel effortless.

ML Engineering

Rigorous, reproducible ML: leakage-safe time-series splits, honest baselines (MASE), schema contracts with Pandera, MLflow tracking, and model publishing to Hugging Face — production practice, not just notebooks.

End-to-end delivery

I ship the whole stack: from data pipelines and model serving to the pixels a user touches. Each project here spans several tiers, wired together and running in production.

Next.jsReactTypeScriptTailwind CSSSwiftUISwiftFastAPIPythonPyTorchscikit-learnXGBoostPanderaMLflowHugging FacePostgresSQLAlchemyPlaidClaudeWebAuthnVercelNext.jsReactTypeScriptTailwind CSSSwiftUISwiftFastAPIPythonPyTorchscikit-learnXGBoostPanderaMLflowHugging FacePostgresSQLAlchemyPlaidClaudeWebAuthnVercel

Selected Work

Systems I've designed, built and shipped

Project Millionaire

Real-time personal net-worth intelligence

A real-time personal net-worth dashboard that aggregates every account you own — banks, brokerages and credit cards via Plaid — alongside manual assets Plaid can't reach, then layers on AI-parsed email receipts and daily snapshots for a single, always-current picture of your wealth.

Plaid integration syncs banks, brokerages & cards in real time with encrypted token storage
Passkey-only WebAuthn auth — zero passwords, with step-up assertions for sensitive ops
AI receipt pipeline: Gmail OAuth + Claude Haiku extract line-items (~$0.001/email)
Automatic subscription detection derives recurring merchants, cadence & monthly cost
Daily 09:00 PST cron captures canonical net-worth snapshots for trend analysis
Fernet AES-128 encryption at rest for all Plaid/Gmail tokens and email bodies
Hand-rolled interactive SVG net-worth chart with hover crosshair & delta tooltips

Next.js 14TypeScriptTailwindFastAPIPythonNeon PostgresSQLAlchemyPlaidClaude HaikuWebAuthnVercelRender

itsmillion.com

Solo Levelling

Web + iOS + ML strength-tracking ecosystem

A dark, anime-inspired powerlifting tracker built as a full ecosystem: a Next.js web app and a native SwiftUI iOS app both talk to one FastAPI backend, tracking the big three lifts through a bodyweight-adjusted DOTS score. A separate ML study forecasts next-week strength, detects plateaus and recommends calories.

Bodyweight-adjusted DOTS scoring with identical math across TypeScript, Swift & Python
Web + native iOS clients share one FastAPI backend and wire contract
iOS app: SwiftUI + @Observable, optimistic updates with rollback, verified DOTS parity
ML study implements the SAME pipeline 4 ways — Linear, XGBoost, LSTM & Transformer
Leakage-safe time-series: chronological splits enforced by regression tests
Honest MASE evaluation — models rejected if they can't beat naive persistence
MLflow experiment tracking + Hugging Face model publishing

Next.js 14ReactRechartsSwiftUISwift ObservationFastAPIscikit-learnXGBoostPyTorchPanderaMLflowHugging FaceNeon Postgres

solo-levelling.com

Experience

The path so far

Apple

2023 – Present · San Diego, CA · Hybrid

Software EngineerFeb 2024 – Present
Build internal Power & Performance tooling in the Core OS org that drives device testing and optimization across Apple's product lineup.
Software Engineer InternMay – Aug 2023
Built an internal tool that turns iOS sysdiagnose telemetry into battery-drain graphs, speeding up battery-issue triage.

Cimpress India

2020 – 2022 · Mumbai, India

Senior Software EngineerOct 2021 – Aug 2022
Built the Chronicles UI infrastructure in React and published it to npm — reused across Cimpress teams.
Software EngineerOct 2020 – Sep 2021
Re-architected the Sessions API with Redis (AWS ElastiCache) caching — 10× faster record retrieval.

Google Summer of Code

2019 · Remote

Full Stack EngineerMay – Sep 2019
Led the Mifos Initiative open-source project; database indexing lifted banking-service UX by ~20%.

Teach For India

2019 · Mumbai, India

Full Stack EngineerJun – Aug 2019
Built reusable React components and TFI student-app features; ran onboarding for 20,000+ applicants.

Computer Society of India

2018 – 2019 · Mumbai, India

Tech Event HeadMay 2018 – May 2019
Ran technical events spanning backend, frontend, databases and cloud for hundreds of students.

Education

San José State University

M.S. Computer Science

2022 – 2023 · GPA 3.9 / 4.0

Fr. Conceicao Rodrigues College of Engineering

B.E. Computer Engineering

2016 – 2020 · 9.21 / 10

Contact

Let's build something worth shipping.

Open to conversations about software, ML, and interesting problems. The fastest way to reach me is any of these.

LinkedInin/rodriguescajetan GitHub@CajetanRodrigues Emailcajetanrodrigues88@gmail.com