Staff Software Engineer, Full-Stack

About the role

Faeth Therapeutics is a clinical-stage oncology company listed on Nasdaq that recently raised $200M in funding. With a strong scientific foundation and a founding team that includes the discoverer of our target pathway, we are advancing PIKTOR, a multi-node PI3K/AKT/mTOR inhibitor program, toward multiple near-term milestones. We are a small, focused team where every person has direct impact — united by a shared commitment to care deeply, create boldly, and never stop learning.

We're looking for a Staff Software Engineer to help shape the architecture and technical direction of our core platform. The product is already in motion, and we need someone who can step in, assess what exists, strengthen the foundation, and drive it forward with the quality, security, and performance it demands.

We’re a small, fully remote engineering team (under 20) moving fast. You’ll play a central role in technical decision-making and work alongside experienced engineers to raise the bar across the system. Security and performance aren’t afterthoughts here; they’re core design constraints, and we need someone who treats them that way.

This is an early-stage company. That means you’ll wear many hats. Some weeks you’ll be deep in architecture decisions; other weeks you’ll be debugging a deployment pipeline, reviewing a junior engineer’s PR, or jumping into a customer escalation. If you need tightly defined boundaries, this isn’t the right fit. If you thrive when the scope is wide and the impact is direct, keep reading.

Reports to: Senior Engineering Manager

Location: Remote (India)

Responsibilities:

- Own and evolve the architecture. Assess the current system, identify what needs to change, and drive the platform’s technical direction - data layer, API surface, frontend application, and deployment infrastructure.

- Build across the stack. Write production code daily in React, Node/NestJS, and PostgreSQL on AWS. You’re not directing from the sidelines; you’re in the codebase.

- Design for multi-tenancy at scale. Solve hard problems around tenant isolation, data partitioning, role-based access, and per-tenant configuration.

- Make security non-negotiable. Bake security into everything - authentication, authorization, data encryption, input validation, API hardening, and compliance readiness. Security isn’t a phase; it’s a design constraint.

- Obsess over performance. Profile, benchmark, and optimize across the stack - from database query plans and caching strategies to frontend rendering and bundle size. Build monitoring and alerting so you know when things degrade before users do.

- Build for scale. Architect with growth in mind - horizontal scaling, load management, connection pooling, async processing, and infrastructure that doesn’t buckle under increasing tenants and traffic.

- Set the engineering standard. Establish patterns, conventions, and quality bars that a growing team will build on top of. Write code that teaches.