Hi, I'm Salah Elhachmi!

Tamwheel (Digital Finance Platform) — ProsperUs · Tunis, Tunisia

• Lead a cross-functional engineering team of 5 (mobile, backend, frontend) as technical lead, owning the Android delivery stream from architecture through production release.
• Set and enforced the mobile architecture standards for the platform's Android app (MVVM, Clean Architecture, modular Kotlin), and drove the technical decisions and code review practices the team followed.
• Owned the Android release lifecycle end to end: Gradle build configuration, App Bundle and ProGuard/R8 rules, GitLab CI pipelines, versioning, store releases, and production deployments.
• Owned production quality with Firebase Crashlytics, triaged defects, coordinated hotfixes for critical issues, and held the mobile release to performance and reliability targets.
• Translated business requirements from Product Owners and business analysts into mobile feature plans, roadmap input, and sprint priorities; reported delivery status and trade-offs to stakeholders.
• Hired and grew the team: ran technical interviews, onboarded new engineers, and mentored through code reviews, pair programming, and technical coaching.

ProsperUs · Tunis, Tunisia

• Led the Android team and owned the architecture of the ProsperUs digital asset wallet app, letting users transfer, store, and manage their asset portfolio from a single Android application.
• Introduced Jetpack Compose to the Android stack after leading R&D on Compose, KMM, and Flutter, then drove the team's adoption and coding patterns around it.
• Established MVVM and Clean Architecture patterns and coding standards, and led the team through code reviews and technical coaching.
• Owned the app's API contract with the backend team (data models, error handling, backward-compatible changes) and built the networking layer with Retrofit and OkHttp.
• Implemented real-time balance updates and transaction history on Kotlin Coroutines and Flow, and built the QR scanning flow behind fast P2P and merchant transactions.
• Engineered trust and security features, including digital signatures and cryptography, for secure financial transactions; tuned ProGuard/R8 rules to keep the shipped APK lean and startup fast.

Digitus · Tunis, Tunisia

• Designed, developed, and shipped the DigiCash e-wallet mobile payment app, implementing secure financial transaction protocols and a smart contract protocol.
• Led the codebase refactor for maintainability and established unit testing practices with JUnit and Mockito, raising the quality bar across the team's deliverables.
• Mentored junior developers, ran code reviews, and promoted engineering best practices across the team.
• Ensured usability, performance, and reliability across a wide range of Android devices and OS versions, minimizing resource usage on constrained hardware.

ConceptLab · Tunis, Tunisia

• Developed multiple Android applications across different sectors, delivering features including user authentication, camera API integration, and push notifications.
• Implemented the push notification infrastructure end to end, including FCM token lifecycle management, and used Firebase and Crashlytics to track and resolve bugs in production.
• Optimized the applications for smooth performance, efficient resource usage, and responsiveness across device configurations.
• Collaborated with the QA team to identify and resolve bugs and performance issues.

MDsoft · Tunis, Tunisia

• Designed, developed, and shipped Android applications across lifestyle, sports events, and environmental domains for clients including Tunisie Telecom, Ooredoo, and the WHO.
• Implemented REST API clients, SQLite data persistence, dependency injection with Dagger, and GCM/FCM push notification systems.
• Took ownership of feature development, bug fixing, and technical documentation across releases.

MDsoft · Tunis, Tunisia

• Contributed to the design, development, and deployment of Android applications with RxAndroid, Event Bus, and View Binding, and wrote unit tests for new features.
• Developed a field application for WHO agents to record hospital data (GPS location, name, address, specialty) within a cross-functional effort with the backend and QA teams.