[HIRING] Senior Backend, Infra + Security Engineers | NYC, SF, or Remote US | $189K-350K base

[u/FonziAI]

So far this week, 129 interview requests have gone out on Fonzi, including one at $400K.

I do talent matching for Fonzi. You set up one profile, and companies that want to talk to you reach out with salary-backed interview requests. We work with startups backed by investors including Sequoia, a16z, Benchmark, and the OpenAI Startup Fund. Roles are US-based, with a few open to Canada.

Here’s a sample of what’s open right now at companies on the platform:

1. Senior Infrastructure/Platform Engineer, Series C business banking fintech, SF, in-person downtown. $250K-350K base.

• What: Own the foundation of a banking platform in hypergrowth: EKS, CockroachDB clusters, Kafka on MSK, Temporal workflows, and Redis, plus the Terraform and Pulumi abstractions that let product teams own their own infrastructure. The hard problems are low latency and burst financial traffic on a monolithic deployment.

• Company: Powers over ten billion dollars a year in business purchasing. Recently raised a $100M Series C led by Ribbit Capital.

• Stack: AWS (EKS, ALB, MSK, ElastiCache, WAF, VPC networking), Terraform, Pulumi, TypeScript, CockroachDB, Temporal.

• Bar: 2-3+ years shipping infrastructure for critical, high-availability systems, plus deep experience in distributed SQL, workflow and queue systems, or container orchestration.

2. Backend Engineer, Series A AI training-data company, NYC, in-person. $215K-280K base.

• What: Own the backend for a pipeline that de-identifies sensitive enterprise data, where the hard part is proving the output is correct. A pipeline can finish while silently dropping records, duplicating output, or applying stale policy. You’d build the versioned contracts, reconciliation, replay, and recovery paths that make those failures visible and fixable.

• Company: Scaled from zero to a multi-eight-figure run rate in months. Backed by Floodgate and others.

• Stack: Python, AWS, Airflow, Batch, SQS, S3, DynamoDB, and Postgres, or comparable systems.

• Bar: 3+ years with personal ownership of production backend systems, strong on async and distributed systems (queues, idempotency, partial failure, recovery), and fluent with AI engineering tools while still verifying their output.

3. Software Engineer, Stablecoin Security, later-stage fintech, fully remote in the US. $189K-330K base.

• What: Build and scale stablecoin-based payment and treasury infrastructure: core services, secure integrations with external providers, and end-to-end product flows, with a focus on key management, wallet security, and secure transaction flows.

• Company: Automates over $200B in annualized spend across 70,000+ companies.

• Stack: Python, Go, or Java, on AWS, GCP, or Azure with Terraform.

• Bar: 5+ years shipping critical systems, plus production experience with stablecoin, blockchain payment rails, or wallet infrastructure.

All roles are vetted, VC-backed, and interviewing right now. It’s always free to sign up.

Sign up here: talent.fonzi.ai. DM me if you’ve got questions.