KOSSENTINI MOHAMMED KHALIL
I’m a full-stack software engineer focused on building reliable fintech products, especially for EUR-to-TND remittances.
About
I’m a full-stack software engineer focused on building reliable fintech products, especially for EUR-to-TND remittances. I care deeply about reliability, security, and clarity—because behind every transfer is a family waiting on it—so I design systems that are resilient in production and straightforward for teams and users.
I’ve owned end-to-end delivery for a production remittance platform, covering the mobile app, backend, cloud infrastructure, security controls, compliance-aligned workflows, and release operations. With 1,500+ active users and dozens of production releases, I continuously improve deployment success, cost efficiency, and fraud resistance while integrating payment channels and KYC flows through secure, well-governed architecture.
- 2 years' experience
- Joined September 2026
Languages
- FrenchAdvanced
- EnglishAdvanced
- ArabicFluent
Industry experience
- Financial Services
- Software & Internet
Work experience
Own the full product lifecycle of a React Native (Expo) mobile app, AWS serverless backend, and React/TypeScript back office serving 1,500+ active users across 50+ releases. Integrated three payout channels (bank transfer, digital wallet, cash pickup) via a third-party PSP API with automatic routing across Tunisian banks and 99%+ reliability. Implemented secure digital wallet linking with OTP-verified sessions, signature-verified relay API, and AWS WAF IP allowlisting. Built consistent user/KYC/payment records across Cognito, the application database, and PSP API throughout the account and transfer lifecycle; spearheaded migration to a new KYC provider and PSD2-aligned legal document versioning with forced re-acceptance. Hardened security and fraud defenses (Cognito hardening, SMS pumping protection, WAF allowlisting, per-channel limits, secrets removed from source). Architected AWS serverless infrastructure with Lambda (private VPC via SAM), API Gateway, EventBridge, RDS PostgreSQL; m
Delivered a sports association web platform using FastAPI and React, including 8+ features in 6 months, live streaming for 500+ concurrent viewers, and secure payments for 100+ monthly transactions. Secured authentication with JWT and improved backend performance by optimizing SQLite/SQLAlchemy queries for about 50% faster responses.
Education
Hire KOSSENTINI MOHAMMED KHALIL today
Post a job and invite KOSSENTINI, or contact them directly. No hidden commission.