Senior Full - Stack Engineer IV responsible for developing and maintaining Synthetic Monitoring solutions. Working at ING in Poland, focusing on reliable and scalable Golang and Grafana systems.
About the role
- Senior Software Engineer building and maintaining payment infrastructure for Wellfit fintech. Expanding payment capabilities and ensuring secure, scalable solutions in a collaborative team environment.
Responsibilities
- Design, develop, and maintain backend services with a focus on .NET and Azure cloud environments.
- Contribute to payment-related initiatives, including:
- ◦Expanding ACH features for practices and recurring billing.
- ◦Enhancing card payments with authorization, capture, and settlement.
- ◦Supporting device-based payments (e.g., Tap to Pay for iOS).
- ◦Exploring modernized payment methods (e.g., network tokens, bank verification).
- Drive secure coding practices, ensuring sensitive financial data is handled and logged properly.
- Participate in breaking down and modernizing microservices for improved scalability and throughput.
- Collaborate with architects, engineers, and product stakeholders to align solutions with business needs.
- Contribute to resolving technical debt and building resilient systems to support increased transaction volume.
Requirements
- Bachelor’s degree in Computer Science, Engineering, or related field.
- 4+ years of professional software engineering experience.
- Proficiency in .NET backend development.
- Experience with cloud development (Azure preferred).
- Demonstrated ability to integrate external APIs and services.
- Strong understanding of secure coding principles and compliance requirements for handling sensitive data.
- Payments industry experience (ACH, card processing, settlement, Worldpay integration, etc.) preferred.
- Exposure to microservices architecture and distributed systems preferred.
- Experience with scaling throughput in payment transaction systems preferred.
- Familiarity with modern payment methods (Apple Pay, Google Pay, network tokens) preferred.
Benefits
- Competitive salary range: $130,000 – $150,000+, depending on experience and payments expertise.
- Comprehensive benefits package [insert details if available].
- Opportunities for professional growth and cross-team collaboration.
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