Software Engineer

Were looking for a Senior Software Engineer to design build and evolve our enterprise data APIs. This role will be actively involved in API architecture and delivery contribute to a new API catalog and self-service discovery portal and help drive AI-assisted improvements to how we design build and ship APIs.

Were looking for someone who combines strong hands-on engineering with the judgment to architect scalable secure well-documented APIs and whos comfortable coordinating across teams to get there.

Essential Functions:

• Design build and maintain APIs using .NET.
• Architect API and database solutions for scalability reliability and maintainability.
• Design optimize and integrate databases - MongoDB PostgreSQL MySQL and OpenSearch - with APIs for efficient data storage search and retrieval.
• Use Kafka for event-driven and streaming integration patterns.
• Author and maintain API specifications using OpenAPI ensuring consistent well-documented API design standards.
• Contribute to a formal API catalog and registry a developer portal where teams can discover available API endpoints through natural-language search.
• Help drive AI-assisted improvements to API development and delivery (e.g. AI-assisted code generation testing or monitoring).
• Debug and troubleshoot production issues using Grafana and related observability tooling.
• Identify and remediate security vulnerabilities using SonarQube (SAST) DAST tooling and OWASP Top 10 best practices.
• Participate in requirement analysis estimation and deliverable planning in coordination with cross-functional teams.

Qualifications:

Required Education:

Bachelors degree with 57 years of professional software engineering experience or Masters degree with 35 years of experience with a focus on API development.

Required Knowledge and Experience

• Strong hands-on experience .
• Solid experience designing optimizing and integrating MongoDB PostgreSQL MySQL and OpenSearch with APIs.
• Experience with Kafka for messaging/streaming.
• Experience designing and documenting APIs with OpenAPI.
• Experience debugging and monitoring production systems using Grafana.
• Experience identifying and fixing security vulnerabilities using SAST tools (e.g. SonarQube) DAST tools and OWASP-aligned practices.
• Strong communication skills with proven experience in cross-team coordination.
• Experience with requirement analysis estimation and deliverable planning.

Preferred Qualifications

• Experience with Druid or Oracle.
• Exposure to AI/LLM-assisted development workflows.
• Experience with API catalog/registry or developer portal tooling.

For over 35 years Fintech LLC has redefined how over 1.1 million B2B relationships buy and sell goods and services in the retail hospitality and alcohol industries. This integrated platform centralizes invoice data and payments POS and delivery data product and cost compliance price book management and industry market data using AI seamless integration capabilities and proprietary automation technology.

Fintech is a Drug-Free Workplace. Fintech is an Equal Opportunity Employer that does not discriminate on the basis of actual or perceived race color creed religion national origin ancestry citizenship status age sex or gender (including pregnancy childbirth and pregnancy-related conditions) gender identity or expression (including transgender status) sexual orientation marital status military service and veteran status physical or mental disability genetic information or any other characteristic protected by applicable federal state or local laws and ordinances. Fintechs management team is dedicated to this policy with respect to recruitment hiring placement promotion transfer training compensation benefits employee activities access to facilities and programs and general treatment during employment. We E-Verify.

Required Experience:

Senior IC