Senior Full Stack Software Engineer

About the Role A growing technology startup is hiring a Senior Full Stack Software Engineer to help build and scale its core product. This engineer will work across the frontend and backend, contributing directly to customer-facing features as well as internal systems. The role offers a high level of ownership and influence over technical decisions in a fast-paced environment. This position is well-suited for an engineer who enjoys working closely with product and design, shipping quickly, and improving systems over time. What You'll Do Build and maintain full stack web applications used by customers and internal teams Develop scalable backend services and APIs to support product features Implement modern, responsive frontend interfaces with a focus on usability and performance Collaborate with product managers and designers to define requirements and deliver solutions Contribute to architectural decisions and technical roadmap planning Write high-quality, well-tested code and participate in code reviews Help improve engineering processes, tooling, and system reliability Mentor junior engineers and contribute to a strong engineering culture Tech Environment The engineering team works with a modern startup stack, including: Frontend: React, TypeScript, Next.js Backend: Node.js (Express or NestJS) and/or Python (Django or FastAPI) Databases: PostgreSQL, Redis Cloud & Infrastructure: AWS or GCP, Docker, CI/CD APIs: REST and GraphQL Tools: Git, GitHub, modern monitoring and logging tools What We're Looking For 5+ years of professional software engineering experience Strong full stack experience with modern JavaScript/TypeScript Proven experience building and maintaining backend services and APIs Solid understanding of relational databases and data modeling Experience deploying and operating applications in cloud environments Ability to work independently and take ownership of projects Prior experience in a startup or fast-moving product team is a plus Compensation & Benefits Base Salary: $160,000 - $210,000 (San Francisco senior-level range) Equity: Competitive equity package Benefits: Medical, dental, vision coverage; flexible PTO; standard startup benefits Work Model: Hybrid or remote-friendly depending on location and team needs Equal Opportunity This role is with an equal opportunity employer. Qualified applicants will be considered without regard to race, color, religion, gender, sexual orientation, gender identity, age, disability, or veteran status. twenty80.io