Belal.

Software Engineer

Open to software engineering roles and client website projects. Newark, NJ.

The same work, three other ways

github.com/BembabyLinkedInRésumé (PDF)

Belal Embaby · Software Engineer

I build software from the database to the App Store.

I'm a software engineer who builds Java/Spring Boot APIs, native SwiftUI apps for iPhone and Apple Watch, and full-stack web apps for businesses.

Status
Open to software engineering roles
Work setup
Remote · Hybrid or on-site in NYC/NJ · Open to relocation
Authorization
Authorized to work in the US, no sponsorship needed
Based in
Newark, NJ
Email meView résuméGitHubLinkedIn

Hiring an engineer?

Start with shipped work and the engineering decisions behind it.

Need a website for your business?

I build fast, custom sites that show customers your menu or services, your hours and how to find you, with the next step one tap away on a phone.

Discuss a project

Selected work

Shipped and live
FitTrack+ training screen showing today's split, a Start Workout button and saved programs.Progress dashboard with body weight, weekly volume, sessions and estimated one-rep-max trends.
Screenshots from the public App Store listing.

Shipped productLive on the App Store

FitTrack+

Native fitness app for iPhone, iPad and Apple Watch

Built and shipped a native SwiftUI fitness app with Apple Watch workout flows, backed by a Java/Spring Boot/MySQL API and a Next.js client.

2,000+ App Store downloads200+ active usersSelf-reported, as of October 2026

Who it helps
People who train with weights and want quick set logging, programs and progress history from their iPhone or Apple Watch.
What I owned
The whole product: interface design, the SwiftUI iPhone, Apple Watch and widget targets, the Spring Boot API and MySQL data model, the Next.js web client, and App Store releases.
  • Swift
  • SwiftUI
  • watchOS
  • HealthKit
  • WatchConnectivity
  • WidgetKit
  • Live Activities
  • Java
  • Spring Boot
Read the case study View on the App StoreWeb client (fitstrack.com)
emBabySteps home page on desktop: the title Little Steps, Big Milestones over a large baby footprint, a nursery rainbow, Van Gogh's First Steps, and an age picker from 0 to 3 months through 3 to 5 years.The emBabySteps home page on a phone, with the title, the Read the latest and Ask a PT buttons, and the age picker.
Public pages captured from embabysteps.com on October 21, 2026, with the author's name replaced by her role. The editor and admin views come from a local copy with sample content and test accounts.

Client projectLive, in pre-launch

emBabySteps

Full-stack publishing platform for a pediatric physical therapist

Designed and built a Next.js and Postgres publishing platform for a licensed pediatric physical therapist: a custom block editor with pre-publish checks, reader accounts, comments and saved posts, authenticator sign-in for staff, branded email and scheduled publishing.

Who it helps
Parents and caregivers of children from newborn to age five, and the physical therapist who writes for them several times a week.
What I owned
Everything: product decisions with the author, the design system, the Next.js app, the Postgres schema and migrations, authentication and security, email, tests, and deployment on Vercel and Railway.
  • Next.js
  • React
  • TypeScript
  • PostgreSQL
  • Drizzle ORM
  • Better Auth
  • Tiptap
  • Tailwind CSS
  • Zod
Read the case study Visit embabysteps.com
Park West Diner homepage on desktop: the diner's script logo above the line “Classic diner soul. A whole new shine.” with View the Menu and Get Directions buttons.Park West Diner homepage on a phone with full-width View the Menu, Get Directions and Call buttons.
Screenshots of the public site, captured October 14, 2026.

Client projectLive on the diner's domain

Park West Diner

Custom restaurant website · Little Falls, NJ

Designed and launched a custom restaurant website that makes the menu, specials, hours, directions and ordering link easy to find.

Who it helps
Diner guests, mostly on phones, who want to see the menu, check whether it's open, call, get directions or order pickup.
What I owned
Design and front-end development, turning the printed menu into a searchable web menu, an owner update flow for specials and photos, and the launch on parkwestdiner.com.
  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • WebGL
  • Vercel
Read the case study Visit parkwestdiner.com

How FitTrack+ is built

Two Apple clients, one API, one database and a web client. The hard part is keeping the iPhone and the Apple Watch on the same workout, and the case study walks through how.

How FitTrack+ fits togetherShipped system · simplified

In words

  • iPhone app → Apple Watch app: Versioned session snapshots.
  • Apple Watch app → iPhone app: Set actions + live metrics.
  • iPhone app → Spring Boot API: HTTPS · idempotency-keyed workout logs, offline replay.
  • Next.js web client → Spring Boot API: Proxied HTTPS, first-party cookies.
  • Spring Boot API → MySQL: Reads and writes.

Open source

Authored, merged work

merged open-source pull requests

Verified October 26, 2026Check them on GitHub

Merged on 11 days, busiest September 21 with 15. Newest: sentence-transformers #4248, Correct the DDP evaluator note in the training overviews (October 23).

Every one is mine and merged by the project's maintainers, between September 13 and October 23, 2026. Reviews of other people's pull requests aren't counted.

  • Bug fixhuggingface/sentence-transformers#4217Merged Oct 19, 2026

    Keep new sparse search corpora from sharing an index name

    New sparse search indexes were named after the current second, so two created in the same second collided: Qdrant rejected the second one, and Elasticsearch and OpenSearch deleted the first index and replaced it. Names now end in a UUID, the helpers no longer delete a colliding index, and reusing an existing index works as before.

    The test freezes the clock and runs two builds against one real in-memory Qdrant database. Elasticsearch and OpenSearch got source review, not live-server tests.

    Pull request #4217

  • Performancemaziyarpanahi/openmed#3540Merged Oct 16, 2026

    Remove quadratic list-boundary copying

    To find where each list item ended, the materializer sliced the rest of the item list on every pass (seeds[index + 1:]), so a flat list of n items copied about n²/2 references. One backward pass with a monotonic stack now finds every item's end, and each item enters and leaves the stack once. Offsets and nesting are unchanged.

    12 focused regression tests on synthetic lists, and the full suite passed with 21,548 tests and no failures. Building the text slices still scales with their total size, so I didn't claim a production speedup.

    Pull request #3540

Every merged pull request, by date and type →

Experience

Open Source Contributor

- Present
  • Fixed sentence-transformers search index collisions with UUID suffixes to prevent existing indexes from being deleted; tested with a frozen clock against in-memory Qdrant.
  • Fixed an OpenMed cache race by treating entries deleted before a read as cache misses; verified with 8 deterministic tests.
  • Reduced OpenMed list-boundary detection from quadratic to linear work using a monotonic stack; 12 regression tests and the full 21,548-test suite passed.

So far: 35 merged pull requests in OpenMed and 10 in Hugging Face's sentence-transformers, as of October 26, 2026. See every one.

Education

B.S. Computer Science, New Jersey Institute of Technology
Ying Wu College of Computing

Graduated December 2025 · Dean's List, four semesters

Languages

Arabic, English, Spanish.

Newark, New Jersey

Skills, with evidence

AreaToolsWhere to see it
Backend & dataJava · Spring Boot · Spring Security · REST APIs · JPA · MySQL · PostgreSQL · Drizzle ORM · JWT / OAuthFitTrack+, emBabySteps
Apple platformsSwift · SwiftUI · watchOS · HealthKit · WatchConnectivity · WidgetKit · Live Activities · App Store releasesFitTrack+
WebTypeScript · JavaScript · React · Next.js · Tailwind CSS · HTML · CSSPark West Diner, belalembaby.com, FitTrack+, RANCS Capital
Python & testingPython · pytest · Regression tests · Playwright · axe accessibility checksOpen-source contributions, belalembaby.com
DeliveryGit · GitHub Actions · Docker · Railway · VercelFitTrack+, Park West Diner, belalembaby.com

Also used: C and SQL.