Pasito (YC S22) - Fullstack Software Engineer

Pasito is the AI workspace for employee benefits.

We’re rethinking how group insurance and benefits are underwritten, delivered, used and measured - by the people who design them and the people who depend on them. Instead of static PDFs, disconnected systems, and manual workflows, Pasito brings plan design, payroll and benefits data, claims, and financial context into a single, AI‑native workspace that helps benefits actually work for the 178 million Americans who depend on this system.

We don’t build for brokers, carriers and employers - we build with them. That collaboration shows up in everything we ship: AI agents that extract and structure plan data, tools that turn complexity into clarity for employees, and workflows that save carriers and consultants hundreds of hours per case.

Today, Pasito supports many of the largest insurance carriers and brokers in the U.S. We’re backed by Y Combinator and Core Innovation Capital, and we’re growing quickly. We ship fast, iterate relentlessly, and care deeply about building systems that are accurate, scalable, and human.

If you’re excited to work alongside exceptional operators and engineers, and apply AI in a legacy industry where precision and trust matter, Pasito is the place for you.

As a Full Stack Engineer at Pasito, you’ll build the product experiences and technical systems that help employees understand, elect, and use their benefits. You’ll work across frontend, backend, infrastructure, and AI-powered workflows to deliver polished, scalable web applications that improve health and financial outcomes for millions of families.

As an early member of the engineering team, you’ll have real ownership and influence: shaping product architecture, defining engineering standards, prototyping new features, and building systems that carriers, brokers, employers, and employees rely on every day.

You’re an engineer with strong product instincts who enjoys prototyping, experimenting, and iterating quickly. You understand that great products are not invented in one pass, but discovered through relentless iteration, customer feedback, and thoughtful execution.

• Build full-stack product experiences
  Design, build, and ship scalable web applications across the frontend and backend, with a focus on usability, reliability, and long-term maintainability.

• Deliver polished frontend experiences
  Create delightful, high-quality user interfaces using modern frontend frameworks like Next.js. You may not be a designer, but you enjoy collaborating closely with design and care deeply about the details that make products feel intuitive and trustworthy.

• Own backend systems and APIs
  Build and maintain backend services, APIs, data models, and integrations that power Pasito’s platform, with attention to correctness, scalability, observability, and clean architecture.

• Integrate AI into real products
  Work with AI and LLM-powered systems, including models like ChatGPT and Claude, to help bring intelligent benefits guidance into core user workflows.

• Collaborate cross-functionally
  Work closely with Product, Design, Sales, Client Success, and Operations teams to understand customer needs and translate them into durable technical solutions.

• Continuously improve systems
  Refactor thoughtfully, reduce technical debt, improve testing and reliability, and help define what “great” looks like as the platform and team scale.

• A full stack engineer with 3+ years of experience building complex web applications

• Comfortable working across all levels of the development stack, from polished frontend experiences to backend systems and APIs

• Product-minded, with strong instincts for user experience, iteration, and customer impact

• Experienced working on scalable web applications or distributed systems

• Comfortable integrating AI / LLM-powered capabilities into real products

• Highly motivated, resourceful, and energized by solving ambiguous problems in a fast-moving environment

• A collaborative partner to product managers, designers, client-facing teams, and other engineers

• Someone who loves learning about new technologies, while understanding the value of continuing to use proven tools when they still do the job well

• Someone who cares deeply about maintainability and is willing to advocate for refactoring, cleanup, and thoughtful technical decisions when appropriate

• 3+ years of experience in full-stack software engineering, preferably building web-based applications in a SaaS environment

• Strong experience with TypeScript across the frontend and backend

• Expertise with modern frontend frameworks such as Next.js

• Backend engineering experience with Node.js, APIs, and service-oriented architecture

• Experience working with AI / LLM models such as ChatGPT, Claude, or similar systems

• Experience with AWS and serverless services, including infrastructure-as-code tools such as AWS CDK

• Experience working with SQL databases such as MySQL

• Strong familiarity with testing tools, testing methodology, and practices that support reliable production systems

• Experience building scalable web applications or other distributed systems

• Systems thinking: you know that some refactoring is inevitable as a company scales, but you still believe in making thoughtful technical decisions up front

• Experience working at an early-stage startup is a plus

• Experience with health, benefits, insurance, financial services, or sensitive data is a plus, but not required

• Meaningful ownership: Build foundational product experiences and systems used by carriers, brokers, employers, and employees at scale

• Real impact: Your work directly improves how people understand, choose, and use their benefits, helping families make better health and financial decisions

• Growth: Join early and grow with the company as we scale our product, team, and distribution

• Exceptional team: Join a highly collaborative team backed by Insight Partners, Y Combinator and Google

• Silver screening Interview

• Silver Technical Interview

• Client Screening Interview

• Client Technical interview

• Client Behavioral Interview