Senior Full Stack Engineer
United IT
Sr. Full Stack EngineerJob Location: Wilmington, DE – OnsiteSenior.NET Full Stack Developer emphasizing backend for platform integrations and payments processing in our core banking systems. You'll drive secure, scalable solutions for transaction workflows, third-party gateways, and regulatory-compliant payment platforms.Key ResponsibilitiesDevelop backend services in.NET Core/8+ for payments processing, including ISO 20022/SWIFT message handling, real-time rails (FPS, RTP), and full lifecycle from initiation to settlement/reconciliation.Integrate platforms with bank APIs, third-party gateways (e.g., Visa, ACH), SFTP/XML/JSON feeds, and microservices using ASP.NET API, gRPC, and queues like RabbitMQ.Contribute full stack with Angular/React frontends for payment dashboards, while optimizing SQL Server/NoSQL for high-volume financial data and ensuring PCI-DSS compliance.Manage CI/CD via Azure DevOps, Docker/Kubernetes deployments, performance tuning, and monitoring with Application Insights for production stability.Lead code reviews, agile collaboration with fintech teams, and troubleshooting for payments and integration issues.Required Qualifications8+ years.NET backend experience, including 4+ years in payments/integration (ISO 20022, SWIFT MT/MX, SEPA, Open Banking).Expertise in C#, async APIs, Entity Framework, secure auth (OAuth/JWT), and cloud (Azure/AWS) for scalable financial apps.Strong SQL, message processing, error handling, and regulated environments; full stack basics (Angular/TypeScript).Preferred SkillsBanking payments (ACH, wire, RTP), event sourcing, and DevOps tools (Terraform, ELK).Certifications: Microsoft Azure Developer Associate.
Vacancy posted 3 days ago
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