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

SourceIQ; Washington (District of Columbia); Remote; USD 120,000 - 135,000; Part time

Job summary

A dynamic startup is looking for a part-time Backend Engineer to take ownership of their API infrastructure and authentication system. You will work with a small engineering team to build and secure APIs using NestJS and TypeScript, implementing essential authentication protocols. Ideal candidates have over 5 years of experience and thrive in fast-paced environments, contributing to significant projects while earning equity in a growing company.

Benefits

Earn equity in a growing startup

Fully remote work

Work on real enterprise use cases

Qualifications

• 5+ years backend development experience, ideally with NestJS or Node.js.
• Experience with OAuth2, RBAC, SSO (Microsoft preferred).
• Ability to write clean, testable, scalable code in TypeScript.

Responsibilities

• Build and maintain APIs using NestJS + TypeScript.
• Implement and manage OAuth2, SSO, and Role-Based Access Control (RBAC).
• Harden endpoint security for RFP matching, communication, and supplier data workflows.

Skills

Backend development

OAuth2

RBAC

NestJS

TypeScript

Tools

Cosmos DB

Azure Blob Storage

GitHub Actions

Job description

Join to apply for the Backend Engineer (APIs + Authentication) — Part-Time (25–30 hrs/week) EQUITY ONLY role at SourceIQ

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Join to apply for the Backend Engineer (APIs + Authentication) — Part-Time (25–30 hrs/week) EQUITY ONLY role at SourceIQ

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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

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