Shipping production software at a pace most teams need a squad for.

I work across mobile, web, and backend — using AI as a multiplier, not a replacement for thinking. The goal is always the same: something that works correctly and holds up over time.

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Lines of Code Delivered

Sum volume of core systems designed, implemented, and shipped solo across mobile and web client platforms.

SaaS Feature Modules

Modular feature slices authored, ensuring clean separation of concerns and robust multi-tenant data boundaries.

Database Schema Migrations

Idempotent database schema evolutions managed securely, backed by row-level security and optimized RPC layers.

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Selected Work

Case studies built around constraints, decisions, and outcomes.

These are the projects I would want a hiring manager or client to review first. Each one starts with a production constraint and ends with a measurable result.

Live Commerce Marketplace

Solo-built a production Flutter marketplace with real-time live streaming, auction bidding, and a full financial ledger — from buyer checkout through seller settlement and payout — for a regional e-commerce client.

FlutterDartRiverpodAutoRouteSupabase (Postgres, RLS, Realtime, Edge Functions, Storage)

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Key ConstraintThe entire product — mobile app, backend, and web version — had to be built and shipped by one engineer.

Delivered OutcomeShipped a full production Flutter app (~149k LoC) on iOS and Android within 6 months as a solo engineer.

Wallet Settlement Ledger Flow

Checkout

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Agora RTC

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TypeScript Ledger

Real-Time Multiplayer Quiz Platform

Built a bilingual Arabic/English quiz platform with two game modes — a host-led trivia board and live multiplayer Seen-Jeem rooms — backed by atomic Postgres RPCs to eliminate race conditions at scale.

Next.js 15 (App Router, RSC, Server Actions)React 19TypeScriptTailwind CSS v4Supabase (Postgres, RLS, Realtime, Edge Functions)

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Key ConstraintSeen-Jeem gameplay required sub-second question broadcast and answer collection across all connected players — naive server-action round-trips were too slow.

Delivered OutcomeSeen-Jeem multiplayer latency dropped significantly after migrating to atomic Postgres RPCs, eliminating the sequential server-action bottleneck.

Seen-Jeem Latency (Actions vs RPC)

Server Actions

520ms

Postgres RPC

45ms

B2B SaaS Recruitment Marketplace

Architected an Arabic-first SaaS platform connecting companies with HR freelancers for project-based hiring — including a custom pricing engine, a 13-phase ATS Kanban, five Gemini AI workflows, and end-to-end Moyasar payment processing with VAT compliance.

Next.js 15 (App Router, RSC)React 19TypeScriptSupabase (Postgres 15, RLS, Realtime, Edge Functions, Storage)Google Gemini AI

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Key ConstraintThree separate user portals with completely different workflows had to share one codebase without leaking cross-tenant data — enforced at the database level, not just the application layer.

Delivered OutcomeDelivered a 566-file, ~109k line TypeScript codebase with 21 feature modules, 200+ database migrations.

Database Multi-Tenant RLS Isolation

Tenant ABlocked

Gemini AIAuthorized

Tenant BBlocked

Cvia — AI Resume Builder

Designed, built, and launched an opinionated resume builder for tech professionals in 5 weeks — with Gemini AI bullet refinement, in-app purchases, and a Dockerized LaTeX-to-PDF pipeline that cut generation costs by ~60%.

FlutterDartAppwriteFastAPIPython

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Key ConstraintPDF generation from LaTeX is CPU-intensive and slow if done on the mobile device or a shared function — it needed to be isolated.

Delivered OutcomeShipped a working MVP to the App Store and Play Store in 5 weeks.

Dockerized LaTeX Compile Pipeline

FastAPI JSON

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LaTeX Compiler

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Optimized PDF

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Engineering

Early-stage engineer who owns products end to end — from schema design to App Store.

I work best in teams where implementation quality matters as much as the architectural decision behind it.

Apr 2025 - Present

Software Engineer

Etlaq

First engineer to join. Own end-to-end delivery of client products across mobile and web, contributed to PRDs, client discovery, and hiring process alongside building the engineering culture from scratch.

Jun 2024 - Aug 2024

Full Stack Developer

Nisfak

Worked inside an existing Flutter codebase, led a UI overhaul, and cut iOS CPU usage in half by profiling and optimising hot render paths with iOS Instruments and Flutter DevTools.

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Draft Notes

Working notes on architecture and interface decisions.

A few essays and internal memos have turned into reusable thinking. The published set is small; the useful ideas are not.

Draft in progress

Making Flutter Apps Look Premium

The gap between a Flutter app that looks cheap and one that feels considered is rarely about features. It is about typography, motion, color discipline, and a handful of decisions most developers skip.

Draft in progress

Coupling, Boundaries, and Shared Domains

What actually goes wrong when you ignore bounded contexts in a growing codebase, and how to draw lines that hold up under real product pressure.

Draft in progress

Refactoring Slop: Inheriting a Vibe-Coded Codebase

A walkthrough of a real codebase handed off after going wrong — what the patterns looked like, how I diagnosed the damage, and what the refactor actually involved.

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Conversation

Available for conversations worth having.

If something here resonated, feel free to reach out.

Direct Channelsalem.develops@gmail.com

GitHubgithub.com/Dev-Salem

Location

Riyadh, UTC+3

Response time

Usually within one to two business days