Tellus Solutions, Inc · 22 hours ago
Senior Software Engineer
United States
Full-time
Remote
Senior Level, Lead/Staff
10+ years expTellus Solutions, Inc is seeking a Senior Software Engineer with extensive expertise in .NET/C# and fintech experience to join their engineering team. The role involves architecting, building, and maintaining critical payment processing systems and integrations, while leveraging cutting-edge technologies to enhance payment infrastructure.
Information ServicesInformation TechnologyProfessional ServicesSoftware
Responsibilities
Build scalable payment processing systems using .NET/C# that handle high-volume, mission-critical transactions
Design and implement CQRS (Command Query Responsibility Segregation) patterns for event-driven payment workflows and real-time data synchronization
Develop and maintain payment processor integrations with major payment processors
Build robust RESTful APIs and event-driven microservices that power our payment solutions for ISVs and software platforms
Integrate AI/ML capabilities into payment systems for fraud detection, risk assessment, transaction optimization, and intelligent routing
Work on real-time transaction processing with a focus on reliability, security, performance, and data consistency
Implement PCI-compliant systems ensuring the highest standards of data security and regulatory compliance
Troubleshoot and resolve technical issues in production payment systems at scale
Qualification
Required
10+ years of professional software development experience with .NET/C# in production environments
Strong fintech or payments industry experience, with deep knowledge of payment processor integrations (Stripe, Client, Financial, Worldpay, TSYS, etc.)
Experience implementing CQRS (Command Query Responsibility Segregation) and event sourcing patterns in production systems
Hands-on experience with Google Cloud Platform (GCP)
Experience working with modern AI/ML technologies such as integrating AI models, working with LLMs, implementing AI-powered features, or collaborating with data science teams
Deep understanding of payment processing workflows including authorization, capture, settlement, refunds, chargebacks, and reconciliation
Expertise in designing and building RESTful APIs and event-driven microservices for high-traffic, low-latency systems
Expert knowledge of PCI-DSS compliance and secure payment data handling, tokenization, and encryption
Strong problem-solving skills with the ability to debug complex distributed payment systems
Preferred
Experience with CockroachDB or other distributed SQL databases for globally distributed, resilient data storage
ASP.NET Core and SignalR experience for building real-time web applications and payment notifications
Background in fraud detection systems or risk management platforms
Knowledge of network tokenization, 3DS authentication, or Level 2/3 card processing
Experience with observability tools (Datadog, New Relic, Google Cloud Monitoring)
Understanding of OAuth 2.0, OpenID Connect, and API security best practices
Company
Tellus Solutions, Inc
Founded in 2005, Tellus Solutions, a Minority-owned firm has been delivering AI, ML, IT solutions to medium and large partners.
51-200 employees
Funding
Current Stage
Growth StageLeadership Team
S
Sara Jain
Co-Founder
Company data provided by crunchbase