Senior Software Engineer, Backend

Why Join

This is a rare opportunity to join a fast‑growing AI + data infrastructure company where engineering owns the product. You'll build the foundational systems that every vertical (healthcare, finance, coding, etc.) depends on — and your work will directly determine the company's ability to scale.

Why top engineers are excited about this role:

• Massive ownership — you will architect the core infra the entire company builds on
• High‑talent density — small team, no passengers, everyone is an A‑player
• Real impact — your work unlocks new verticals and accelerates product velocity
• Elite compensation — base + equity + 4% gross‑profit share (often $300K+ in bonus potential)
• Fast career trajectory — you'll mentor the entire junior engineering team
• Hard engineering problems — distributed systems, infra reliability, scalability, observability

If you want to build foundational systems at a company scaling aggressively, this is the role.

About the Role

We're looking for a Senior Software Engineer (6–8 YOE) who is full‑stack but infra‑oriented, capable of designing and owning the core platform that powers all product verticals.

This is not a narrow feature role — you will build the infrastructure that every engineering team relies on.

You will:

• Architect and build the core infrastructure layer that all verticals depend on
• Ensure systems are scalable, observable, reliable, and future‑proof
• Work across the stack (Node.js/Python, Kubernetes, Kafka, Redis, Elasticsearch)
• Build distributed systems that support high‑throughput human‑in‑the‑loop workflows
• Collaborate with vertical teams to provide shared services and platform primitives
• Establish engineering best practices for system design, deployment, and reliability
• Mentor junior engineers and raise the technical bar across the org

This is a foundational role — you will define the technical backbone of the company.

Who You Are

Experience

• 6–8 years of engineering experience (will consider 5 YOE if impact is exceptional)
• Full‑stack capability with strong backend + infra orientation
• Experience building distributed systems, platform infrastructure, or high‑scale services
• Experience in cloud environments (AWS or GCP)
• Strong tenure — no job‑hopping
• Startup experience required (01 or early‑stage preferred)
• Bonus: experience in human‑data or data‑at‑scale companies (e.g., Snowflake, Databricks, Confluent, MongoDB)

Technical Skills

• Node.js / Python
• Kubernetes
• Kafka, Redis, Elasticsearch
• Cloud infra (AWS/GCP)
• Strong debugging, observability, and reliability instincts

Culture Fit

• High‑agency, scrappy, and willing to grind
• Collaborative, open, extroverted enough to work closely with the team
• Comfortable with ambiguity and fast iteration
• Wants to build from scratch — not maintain legacy systems
• Ready to mentor junior engineers and lead by example

Compensation

• Base:  Competitive
• Bonus: 4% gross‑profit share (typically $100K–$300K+)
• Equity: Competitive (up to $600K+ over 4 years for top candidates)
• Location: San Francisco, 5 days/week onsite