{"id":1601592,"url":"https://alion.io/job/fintech-senior-net-software-engineer","title":"Senior .NET Software Engineer","company":{"id":1270,"name":"Fintech","domain":"fintech.com","url":"https://alion.io/company/fintech","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"UltiPro","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Tampa, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":118000,"max_usd":217000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":2993},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"Grafana","optional":false},{"name":"MySQL","optional":false},{"name":"OpenSearch","optional":false},{"name":"OWASP","optional":false},{"name":"OWASP Top 10","optional":false},{"name":"PostgreSQL","optional":false},{"name":"SonarQube","optional":false},{"name":"LLM","optional":true},{"name":"Oracle","optional":true}],"status":"live","first_seen_at":"2026-08-21T15:10:47Z","employer_posted_date":"2026-08-21","last_verified_at":"2026-10-12T03:12:45Z","board_verified":true,"closed_at":null,"days_open":51,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":51},"description":"We're 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.\nWe're looking for someone who combines strong hands-on engineering with the judgment to architect scalable, secure, well-documented APIs - and who's comfortable coordinating across teams to get there.\nEssential Functions:\nDesign, build, and maintain APIs using .NET.\nArchitect API and database solutions for scalability, reliability, and maintainability.\nDesign, optimize and integrate databases - MongoDB, PostgreSQL, MySQL, and OpenSearch - with APIs for efficient data storage, search, and retrieval.\nUse Kafka for event-driven and streaming integration patterns.\nAuthor and maintain API specifications using OpenAPI, ensuring consistent, well-documented API design standards.\nContribute to a formal API catalog and registry - a developer portal where teams can discover available API endpoints through natural-language search.\nHelp drive AI-assisted improvements to API development and delivery (e.g., AI-assisted code generation, testing, or monitoring).\nDebug and troubleshoot production issues using Grafana and related observability tooling.\nIdentify and remediate security vulnerabilities using SonarQube (SAST), DAST tooling, and OWASP Top 10 best practices.\nParticipate in requirement analysis, estimation, and deliverable planning in coordination with cross-functional teams.\nQualifications:\nRequired Education:\nBachelor's degree with 5-7 years of professional software engineering experience, or Master's degree with 3-5 years of experience, with a focus on API development.\nRequired Knowledge and Experience\nStrong hands-on experience with .NET.\nSolid experience designing, optimizing, and integrating MongoDB, PostgreSQL, MySQL, and OpenSearch with APIs.\nExperience with Kafka for messaging/streaming.\nExperience designing and documenting APIs with OpenAPI.\nExperience debugging and monitoring production systems using Grafana.\nExperience identifying and fixing security vulnerabilities using SAST tools (e.g., SonarQube), DAST tools, and OWASP-aligned practices.\nStrong communication skills, with proven experience in cross-team coordination.\nExperience with requirement analysis, estimation, and deliverable planning.\nPreferred Qualifications\nExperience with Druid or Oracle.\nExposure to AI/LLM-assisted development workflows.\nExperience with API catalog/registry or developer portal tooling.\nAbout Fintech:\nFor 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.\nFintech 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. Fintech’s 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. 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