Seraphin M

Senior Software Developer / Full-Stack Developer

Freelance Software Developer

Mar 2025 - Sep 2026 • 1 yr 6 mos

I design, develop, and deploy scalable web and mobile applications for businesses across different industries. I specialize in building clean, maintainable, and production-ready solutions using C#, .NET, ASP.NET Core, React, Angular, Node.js, SQL Server, PostgreSQL, Azure, AWS, Docker, and Umbraco.

Senior Full-Stack Software Developer

Magis Capital Management LLC

Feb 2025 - Nov 2025 • 9 mos

Worked on technology solutions for Magis Capital, a South African financial-services provider that operates a digital financial advisory platform. Magis uses digital processes and systems to collect client information, provide financial advice, and facilitate solutions with financial-services providers. Key areas of experience included: Financial-services digital platform development Web application development Backend API development Client onboarding and profile management Secure authentication and user workflows Financial-services and insurance workflows Integration with external financial-service providers Database-driven business processes Cloud-based application architecture API integrations Responsive web application development Production troubleshooting and application support Security and protection of client information Digital workflows and automation Magis' platform supports digital client registration, secure profiles, financial-advice workflows, and interaction with financial-service providers.

African Bank — Senior Software Developer / Full-Stack Developer

African Bank

Jan 2021 - Sep 2024 • 3 yrs 8 mos

Worked on enterprise software solutions for African Bank, focusing on Umbraco CMS, .NET, React, SQL Server, APIs, and application modernization. Key Responsibilities & Achievements Developed and maintained enterprise web applications using C#, .NET and ASP.NET Core. Worked extensively with Umbraco CMS, including modernization and migration from Umbraco 8 to newer Umbraco versions. Developed modern React and TypeScript frontend applications integrated with .NET APIs. Designed and implemented RESTful APIs for communication between frontend applications, CMS platforms, and backend services. Worked with SQL Server databases, including database development, migration, backup, restore, troubleshooting, and optimization. Migrated and mapped existing CMS content, document types, properties, data types, templates, media, members, and related content structures. Integrated headless Umbraco with React applications to deliver dynamic content through APIs. Worked with the Umbraco Delivery API and custom API integrations. Implemented dynamic page rendering and reusable content components using React and Umbraco Block Lists. Worked with Docker and containerized applications for modern deployment environments. Prepared applications for IIS and cloud-based deployment. Troubleshot complex application, database, API, and deployment issues across development and test environments. Worked with development teams to investigate technical issues, implement solutions, and prepare applications for deployment. Contributed to modernization of legacy systems while maintaining compatibility with existing enterprise requirements.