Backend Engineer (Mid / Senior)
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Key skills for this role
About the Role
Join a Y Combinator-backed startup building an AI-native high-volume interviewing platform. As a Backend Engineer, you will architect efficient APIs, handle video ingestion, optimize for scale and cost, and work with Node.
Key Skills for This Role
Responsibilities
- Build High Efficiency AI Pipelines: architect and maintain APIs for core interview experience
- Work on robust asynchronous systems for high volume video ingestion
- Optimize code for scale and cost, treating computational resource usage as a primary design constraint
- Implement secure, scalable micro transaction flows for global payments
- Manage and optimize database structures (SQL & NoSQL) to handle millions of candidate interactions
Requirements
- Senior: 7+ years experience; Mid Level: 3+ years experience
- Strong proficiency in Node.js, NestJS, and TypeScript
- Proficiency in Python is highly valued
- Experience with Async Queues (RabbitMQ/Redis) and PostgreSQL
- Resource aware mindset: write performant and efficient code
- Comfortable shipping to production daily
Full Job Posting
About Flowmingo
- Flowmingo is a Y Combinator backed startup (plus VinaCapital & top global investors) on a mission to democratize hiring.
- We are fixing the broken hiring model with an AI native, high volume interviewing platform.
- Our model is unique: we offer our tool for free to recruiters to capture massive, uncontested markets.
The Engineering Challenge
- Our architecture must be exceptionally efficient to handle thousands of simultaneous video interviews.
- We are looking for Backend Engineers who care about performance, resource efficiency, and architectural elegance.
What You Will Do
- Build High Efficiency AI Pipelines: architect and maintain APIs for core interview experience.
- High Volume Video Ingestion: work on robust asynchronous systems (queues/workers) for video data.
- Optimize for Scale & Cost: treat computational resource usage as a primary design constraint.
- Global Payment & Monetization: implement secure, scalable micro transaction flows.
- Scale the Data Layer: manage and optimize database structures (SQL & NoSQL).
What You Bring
- Senior: 7+ years experience; Mid Level: 3+ years experience.
- Strong proficiency in Node.js, NestJS, and TypeScript.
- Proficiency in Python is highly valued.
- Experience with Async Queues (RabbitMQ/Redis) and PostgreSQL.
- Resource aware mindset: write performant and efficient code.
- Comfortable shipping to production daily.
Bonus Points
- Familiarity with handling audio/video streams or large binary data.
- Understanding of device fragmentation and internet connectivity in emerging markets.
Why This Role is Different
- Massive Scale: building for millions of candidates in fastest growing economies.
- Real Technical Challenges: unique challenges regarding bandwidth, device latency, and high concurrency.
- Elite Peers: work alongside team members from top institutions (YC, UPenn, NYU etc.).
- High Impact / Low Bureaucracy: lean team, ship features quickly.
- YC Network: access to the most powerful startup network in the world.
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