Backend Engineer (APIs + Authentication) Part-Time (25-30 hrs/week) EQUITY ONLY

Join to apply for the Backend Engineer (APIs + Authentication) — Part-Time (25–30 hrs/week) EQUITY ONLY role at SourceIQ 5 days ago Be among the first 25 applicants Join to apply for the Backend Engineer (APIs + Authentication) — Part-Time (25–30 hrs/week) EQUITY ONLY role at SourceIQ Get AI-powered advice on this job and more exclusive features. SourceIQ is a cloud-based supplier sourcing platform helping mid-market and enterprise procurement teams automate supplier discovery, RFP matching, and vendor engagement in one unified platform. We leverage AI to streamline the entire sourcing process—from supplier data ingestion to AI-powered supplier recommendations. We're an early-stage, product-led startup with strong traction and partnerships in the procurement space. We're now building out MVP2 with a lean but driven engineering team focused on scalable APIs, secure architecture, and enterprise integrations. ** What You’ll Own** We’re looking for a Backend Engineer who can take ownership of our internal API infrastructure and authentication system as we scale to pilot with large enterprise buyers. You’ll Build and maintain APIs using NestJS + TypeScript Implement and manage OAuth2, SSO, and Role-Based Access Control (RBAC) Support features for the Admin Panel (user management, role configuration, system settings) Collaborate with our AI, data, and front-end engineer to secure access layers across the platform Harden endpoint security for RFP matching, communication, and supplier data workflows Help guide best practices for authentication, auditing, and session security Tech Stack (ONLY APPLY IF YOU USE THESE STACKS) Backend: NestJS, TypeScript, Node.js Database: Cosmos DB (MongoDB API), Azure Blob Storage Auth: OAuth2, JWT, Microsoft SSO, RBAC Infra: Azure, GitHub Actions API Standards: REST + GraphQL (future consideration) What You Should Bring 5+ years backend development experience, ideally with NestJS or Node.js Experience with OAuth2, RBAC, SSO (Microsoft preferred) Confidence securing APIs and managing multi-role authentication Ability to write clean, testable, scalable code in TypeScript Experience integrating with Cosmos DB or other NoSQL document stores Comfort working in fast-paced, high-ownership environments (startup-ready) Bonus: experience building admin panels or enterprise SaaS platforms Why Join SourceIQ Now? Join at a pivotal moment—help launch our RFP automation engine & supplier marketplace Work on real enterprise use cases with product feedback from major buyers Fully remote, async-first work style Build infrastructure that supports AI + procurement use cases at scale Earn equity in a high-impact, founder-led startup solving broken sourcing processes How To Apply Send us a short note and links to: GitHub / portfolio / LinkedIn One API or auth-related project you’ve built (open-source or private) You’ll meet the founder + lead engineer for a relaxed technical conversation. Seniority level Seniority level Mid-Senior level Employment type Employment type Part-time Job function Job function Engineering and Information Technology Industries Technology, Information and Internet Referrals increase your chances of interviewing at SourceIQ by 2x Sign in to set job alerts for “Back End Developer” roles. Arlington, VA $150,000.00-$200,000.00 1 month ago Arlington, VA $90,000.00-$100,000.00 1 month ago Washington, DC $120,000.00-$135,000.00 1 day ago Washington, DC $80,000.00-$100,000.00 4 months ago Washington DC-Baltimore Area 3 months ago Arlington, VA $137,000.00-$153,000.00 2 weeks ago Washington DC-Baltimore Area 3 months ago Washington, DC $75,000.00-$90,000.00 4 months ago Washington DC-Baltimore Area 3 months ago Washington, DC $120,000.00-$150,000.00 1 month ago Software Development / Software Engineer roles Washington, DC $75,000.00-$110,000.00 22 hours ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr