Über Oussama
Senior .NET backend and distributed-systems engineer with 10+ years building APIs, microservices, and event-driven backends in C#/.NET.
I design and implement scalable services (REST/gRPC, RabbitMQ, SQL/NoSQL) and real-time dashboards using Blazor/SignalR or modern web stacks.
Experience in finance, industry and SaaS: migrations from monolith to microservices, performance tuning, and production troubleshooting.
I can join existing teams or lead specific backend/architecture missions remotely (B2B, EU time zones).
Englisch
Verhandlungssicher
Französisch
Verhandlungssicher
Arabisch
Muttersprachlich oder zweisprachig
Deutsch
Grundkenntnisse
Vor Ort möglich
Mannheim (bis zu 50 km)
Projekt- und Berufserfahrung
- Self-initiated projectStocksim (OpenSource GitHub)August 2025 - Heute (10 Monate)Event-driven trading/portfolio simulator built to demonstrate modern .NET 8, messaging, real-time UI, and cloud-native deployment.
- Designed and implemented a distributed microservices architecture in .NET 8 with DDD, CQRS and outbox pattern.
- Built real-time trading dashboards using Blazor Server + SignalR (live quotes, orders, executions).
- Implemented asynchronous messaging with RabbitMQ, including idempotent outbox publishers and consumers.
- Containerized services with Docker, local k8s (k3d) and automated deploy to Azure Container Apps.
- Set up observability with OpenTelemetry, Prometheus, Grafana for metrics and tracing.
- mi-Solutions & Consulting GmbHSenior Software EngineerOktober 2021 - Dezember 2025 (4 Jahre und 2 Monate)Hochheim, HE, GermanyWorked on Prexello, a platform used by industrial facilities for real-time equipment monitoring, predictive maintenance, and anomaly detection.
- Orchestrated migration of legacy system from monolith to microservices, introducing RabbitMQ for event-driven decoupling and Docker for repeatable deployments, cutting release lead time ~35%.
- Built a modular dashboard frontend with Razor views and JS modules, integrating Highcharts/Kendo UI for data visualization; introduced decoupled, testable widget lifecycles, improving responsiveness.
- Led backend architecture with CQRS/MediatR, clean REST APIs, and consistent serialization/mapping; reduced controller-domain coupling and made business logic significantly more testable.
- Designed a multi-store data layer unifying MongoDB and SQL Server for telemetry and analytics, enabling richer reporting without impacting OLTP performance.
- Strengthened platform security and reliability with JWT-based RBAC, structured exception handling, async-first patterns, and localized notifications; reduced production error rates by ~28%.
- Standardized CI/CD with Jenkins multi-stage pipelines and operationalized Sentry for release health and proactive incident response.
- Nexeo GroupMid full-stack EngineerFebruar 2017 - September 2021 (4 Jahre und 7 Monate)Paris, FranceConsultant backend/full-stack engineer on long-term engagements for major French banks (Natixis, Société Générale), focusing on P&L, reporting, and cross-asset trading platforms.
- Extended the risk P&L platform with new KPI calculations (stored procedures, C#) wired into Control-M ETL and exposed in a WPF portal, replacing manual spreadsheets with on-demand UI KPIs.
- Built a C# market-data pipeline from a Hadoop data lake into Sybase IQ, processing 100M+ records/day and eliminated 20+ hours/week of manual P&L data prep.
- Modernized legacy internal UIs into a SPA-style JavaScript frontend (Ext JS MVC/MVVM), migrating forms and workflows to reusable components with data binding, shared grids/filters, and stronger validation.
- Worked on a cross-asset trading platform (20+ teams, 200+ devs) with strict quality gates: enforced TDD/BDD, xUnit + SpecFlow tests, and CI-gated PRs via Jenkins, maintaining ~85% coverage and minimizing regressions.
- Built a self-serve portal for non-technical users to report issues or requests, replacing email-based workflows with structured Azure DevOps integration and rules-based routing; streamlining support, reducing inbox noise, and giving the team a clear, trackable workload.
- Collaborated in Agile/Kanban teams using planning poker and sprint demos; also handled night-shift support to diagnose and prioritize P&L issues and coordinate fixes with stakeholders.
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Ausbildung und Abschlüsse
- DiplomaINSAT - National Institute of Applied Sciences and Technology2014Diploma
- BaccalauréatHannibal High School2009Baccalauréat