Senior Full-Stack Engineer

Note: We've kept the name of the company private. If you'd like to know the company before requesting an intro, just email us at hello [at] fractionaljobs.io

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About Us

We're a fast-growing social app for tracking the shows you and your friends are watching, games you're playing, etc.

We have 600K+ users to date and are backed by First Round Capital among others. Advisors include Nikita Bier.

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About the Work

We're building out our friend-finding featureset (think contact syncing, social graph mapping, etc.), and we need it done right. We're looking for a Fractional Senior Full-stack Engineer to lead (primarily) backend development for this featureset.

Specifically, you'll:

• Build the entire friend-finding backend
  • Real-time contact syncing
  • Phone number normalization, hashing, and privacy-preserving matching engine
  • Fast, in-memory graph using Redis for matching and scoring
  • Friend-of-friend and reverse contact matching
• If interested, you can own the frontend too
  • If not, you'll work closely with our lead frontend engineer
• Work mostly async, with very regular checkins and updates

Tech stack:

• Node.js (Typescript)
• React Web (Typescript)
• Redis
• AWS, ElastiCache, Lambda, S3
• Pulumi
• Postgres

We're open to time commitments ranging from 20 - 40 hrs / week

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About You

You MUST have:

• Deep expertise in our tech stack above
• Engineering work at other social, messaging, or viral-growth oriented consumer apps
• You've built contact-syncing, friend-finding, social graph mapping features before
  • If you've not built these kinds of features before, this won't be the right fit
• You work independently, asynchronously, and communicate proactively
• Willing to be on call as needed for infra issues
• 5+ hrs of overlap with EST
  • But you can work on your own time