API
Backend engineering
Design REST endpoints, authentication flows, DTO validation, interceptors, service boundaries, and structured error handling.
Node.js · NestJS · Express.js · TypeScript · JWT
Backend-Focused Full-Stack Developer
I engineer dependable systems—and connect them to the product.
I build from the API and database layer outward, creating maintainable backend flows and integrating them with clean web and mobile clients.
System view
Backend first · client aware
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01
Product requirementClarify workflows, states, and boundaries
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02
API & domain logicTyped contracts, validation, authentication
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03
Data layerRelational models, repositories, persistence
WEBAngular · Next.js · React
MOBILEIonic · Capacitor · Android
REST API design
Relational data
Authentication flows
Web & mobile integration
Collaborative delivery
01 About
I focus on the system behind the interface.
Clear API boundaries, predictable data flow, maintainable modules, and clients that integrate cleanly with backend logic.
I work primarily across backend and database engineering, then move into frontend or mobile integration wherever the product requires it. That end-to-end view helps me trace behavior across layers, debug integration problems, and make choices that fit the existing architecture.
02 Expertise
Capabilities organized around delivery—not logos.
Tools matter when they support a sound system: consistent contracts, reliable data, usable clients, and a workflow a team can maintain.
DATA
Database engineering
Model relational data, manage migrations, and connect application services to maintainable persistence layers.
PostgreSQL · MySQL · Prisma · TypeORM · Supabase
WEB
Frontend integration
Build responsive interfaces, reactive forms, data tables, and client-side flows that stay aligned with API behavior.
Angular · Next.js · React · PrimeNG · SCSS
MOBILE
Mobile integration
Connect Ionic applications to REST APIs, handle secure token storage, and validate flows on Android environments.
Ionic · Angular · Capacitor · Android
QUALITY
API quality & testing
Make behavior inspectable through documentation, request testing, server-side pagination, filtering, and predictable validation.
Swagger / OpenAPI · Postman · API testing · Debugging
DELIVERY
Engineering workflow
Work with feature branches, focused commits, upstream synchronization, code review, containers, and shared monorepo structure.
Git · GitHub · Docker · Nx · Linux · Jira
03 Selected work
Product work with the engineering decisions visible.
Selected systems showing backend logic, persistent data, client integration, and the architecture connecting them.
Case study 01 · Full-stack product
SkillTrade
Next.js · TypeScript · Prisma · Supabase · PostgreSQL
A skill-exchange platform where people can discover expertise, propose exchanges, manage interactions, and access premium product flows.
Product context
The application brings authentication, user relationships, proposals, premium access, and persistent data into one connected product experience.
My contribution
Worked across product flows, authentication, proposal workflows, user interactions, database integration, and frontend/backend behavior.
System flow
- 01 Next.js interface
- 02 Product & auth flows
- 03 Prisma data access
- 04 Supabase / PostgreSQL
Case study 02 · Shared API ecosystem
User Management System
Angular · NestJS · Ionic · PostgreSQL · TypeORM
A full-stack CRUD system and companion mobile client built around the same backend—the clearest example of my web, API, database, and mobile integration work.
Backend
NestJS endpoints, DTO validation, TypeORM entities, PostgreSQL persistence, server-side pagination, sorting, filtering, search, and error handling.
Web client
Angular and PrimeNG UI with reactive forms, tables, dialogs, confirmation flows, and typed API integration.
Mobile client
Ionic and Capacitor client with CRUD, validation, search, sorting, pagination, and Android device testing.
Shared backend, two clients
WEBAngular + PrimeNG
MOBILEIonic + Capacitor
RESTNestJS → TypeORM → PostgreSQL
CLIENTPage / componentCountry, admission, scholarship & visa flows
HTTPDomain helper → shared clientConsistent frontend API access
APIRoute → serviceRequest boundary and domain logic
DATARepository → PrismaIsolated database access
STOREPostgreSQL / SupabasePersistent relational data
Case study 03 · Layered architecture
Pathly
Next.js · React · TypeScript · Prisma · PostgreSQL
A database-backed study-abroad guidance platform that organizes complex information into clear country, admission, scholarship, document, language, and visa flows.
Engineering focus
Structured the application around domain API helpers, shared HTTP behavior, route boundaries, services, repositories, and Prisma-based persistence.
Why it matters
The layered flow keeps UI concerns separate from domain logic and database access, making data paths easier to reason about and change.
04 Experience
Engineering in context: existing systems, shared workflows, real constraints.
Professional-style collaboration is listed separately from training so the nature of each experience stays clear.
Software Engineering Collaboration
Car-rental / automotive platform
Collaborated directly with a senior software engineer on a real car-rental platform in an Nx monorepo, contributing to Angular/Ionic mobile development, NestJS API integration, authentication flows, secure token storage, Android testing, Docker-based development, and professional Git workflows.
Inside the codebase
Worked across shared libraries, web, mobile, and backend boundaries; configured Angular HttpClient and API base-URL interceptors; used typed contracts; and debugged API connectivity and environment configuration.
Mobile & authentication
Contributed to Ionic/Angular authentication services, secure mobile token storage, Capacitor integration, and testing through an Android emulator and a physical device.
Collaboration workflow
Used feature branches, focused commits, fork/upstream synchronization, conflict resolution, review feedback, and rebasing before review when appropriate.
Working flow
- 01 Sync clean main from upstream
- 02 Create a focused feature branch
- 03 Commit and push to personal fork
- 04 Rebase before review when appropriate
- 05 Resolve feedback without rewriting reviewed history
Angular · NestJS · Ionic · Capacitor · TypeScript · Nx · Docker · Android · Git / GitHub
Full-Stack Developer Trainee
TechTalks Academy
Built and developed SkillTrade with Next.js, TypeScript, Prisma, and Supabase, including authentication, database-backed product features, testing, GitHub collaboration, and Jira-based work tracking.
Next.js · TypeScript · Prisma · Supabase · GitHub · Jira
Education context
Computer Science studies support the foundation; the portfolio leads with practical systems, integration work, and shipped projects.
05 Contact
Have a backend, product, or integration problem to solve?
Tell me what you are building, what already exists, and where the system is getting stuck. I’m open to software engineering opportunities and selected project work.
Start with an emailsaadbrayhi123@gmail.com↗