Senior Full Stack Engineer - SaaS Product

Astoria AI is an early-stage startup building a human-centered talent intelligence platform powered by AI. Our mission is to help people better understand their potential and help organizations attract, develop, and retain high-quality talent.

We are looking for a
Senior Full-Stack Engineer

to help build the core SaaS product experience: polished React interfaces, reliable backend services, thoughtful data models, and production workflows that customers can trust.

This is primarily a
senior full-stack SaaS engineering role

, not a GenAI research role. You do not need to be an AI engineer. Familiarity with LLM-powered product features is helpful, but we care first about strong product engineering: clean frontend architecture, reliable APIs, secure data flows, and the ability to ship real software end-to-end.

You will work closely with product and design to turn ambiguous ideas into usable product experiences, shape architecture decisions, and help move the product from MVP toward a scalable platform.

Compensation:

early-stage compensation structure with meaningful equity and salary introduced after MVP/funding milestones.

Location:

remote-friendly, async-first collaboration.

What You’ll Do

• Build high-quality SaaS product features across frontend, backend, and data layers.
• Lead development of React/TypeScript user interfaces, including component architecture, state management, responsive layouts, and complex workflow screens.
• Design and implement backend services, APIs, database schemas, authentication, permissions, and integration workflows.
• Build product systems such as dashboards, notifications, workflow automation, background jobs, and data-heavy user experiences.
• Work with PostgreSQL, MongoDB, or similar databases to design reliable, secure, and maintainable data models.
• Build and maintain secure APIs using Node.js, Python/FastAPI, or similar backend technologies.
• Contribute to deployment and production infrastructure using serverless or cloud platforms such as Vercel, AWS Lambda, Azure Functions, or similar.
• Implement queue-based or event-driven workflows using tools such as Redis, RabbitMQ, Azure Service Bus, or similar technologies when needed.
• Use AI coding tools pragmatically to move faster while keeping code reviewed, maintainable, and tested.
• Collaborate on AI-powered product features as part of the user experience, without losing focus on software quality and product reliability.
• Improve developer experience, CI/CD, testing, monitoring, and operational reliability as the product matures.

What You Bring

• 5+ years

  of professional experience building production web applications.

• Strong experience with
  React, TypeScript, modern frontend architecture, component design, state management, and frontend performance

  .

• Experience building SaaS products, workflow tools, dashboards, marketplaces, internal platforms, or B2B applications.

• Strong backend experience with Node.js, Python/FastAPI, or similar technologies.

• Experience designing APIs, working with relational or document databases, and implementing secure authentication/authorization flows.

• Practical experience with cloud deployment, serverless architecture, or modern hosting platforms.

• Ability to own a feature from product discussion through implementation, release, and iteration.

• Strong engineering judgment: you know when to move fast, when to simplify, and when to invest in structure.

• Product sense: you care how features feel to users, not just whether they technically work.

• Clear written communication and comfort working in a small remote team.

• Comfort with ambiguity and ownership in an early-stage startup environment.

Nice to Have

• Experience with queue-based workflows, background jobs, event-driven systems, real-time features, or notification systems.
• Experience with payment integrations such as Stripe.
• Experience with design systems, Tailwind CSS, data-heavy UIs, or complex workflow automation products.
• Familiarity with LLM APIs, AI-powered product features, RAG, agents, or evaluation workflows.
• Prior startup, founding engineer, or small-team product engineering experience.
• Portfolio, GitHub, shipped product, internal tool, or side project that shows end-to-end product building ability.

Why Join Us

You will help shape the foundation of a new AI-native SaaS product from the ground up. Your work will directly influence the architecture, product experience, and speed of execution.

This role is ideal for a senior engineer who enjoys building real software, making practical architecture decisions, and creating product experiences that users can rely on.

We value:

• Ownership over handoffs
• Product quality over demos
• Speed with engineering judgment
• Clear written communication
• Practical use of AI, not hype

If you are a senior full-stack engineer who has built SaaS products end-to-end and wants meaningful ownership in an early-stage product, we would love to connect.