About heyLibby
heyLibby is a seed-stage startup building the world’s best AI assistant for small to medium businesses focusing on the fitness and wellness industries. We were co-founded by Spencer Rascoff, the former CEO of Zillow and current CEO of Match Group. Our AI works seamlessly across phone, email, text, and chat to help businesses manage their communications efficiently. We move fast, prioritize impact, and work closely with top industry experts. Our culture values transparency, hard work, and making an impact.
About the Role
We are looking for a highly skilled and experienced Senior Software Engineer with the ability to architect, design, and build and with deep expertise in React, TypeScript, Node.js, and AWS. You will be a critical part of our small, high-impact team, architecting and building scalable systems while making quick and pragmatic architectural decisions. We value engineers who can think creatively, ship fast, and build practical solutions that drive real business value. We also use AI throughout all our daily tasks and are looking for engineers that can use the latest AI technologies to accelerate their development.
Responsibilities
Architect, develop, and maintain scalable, high-quality full-stack applications.
Design and implement frontend experiences using React and TypeScript. You will be our React/frontend expert to fill in and round out the team’s skills!
Build and optimize backend services using Node.js on AWS.
Collaborate closely with founders and the team to shape technical decisions and product direction.
Own features end-to-end, from idea to deployment.
Optimize performance and usability while maintaining high-quality code.
Work quickly and adapt to a fast-changing environment while maintaining a pragmatic approach to problem-solving.
Help to select design patterns, and architect solutions top to bottom.
Qualifications
Must-Haves:
5+ years of professional experience in full-stack development.
Strong expertise in React, TypeScript, and Node.js.
Ability to use the latest AI technologies for development, testing, and other tasks
Deep understanding of AWS and cloud-based architectures.
Ability to independently design and architect systems.
Strong problem-solving skills and ability to move fast in a startup environment.
Excellent communication skills and ability to work collaboratively in a small team.
A ‘get-it-done’ attitude and a bias toward execution over perfection.
Nice-to-Haves:
Experience with AWS Amplify.
Experience working at an early-stage startup.
Familiarity with automated testing tools and CI/CD pipelines.
Experience with Identity and Access Management solutions.
Experience with Authentication and Authorization frameworks (OIDC, OAuth, etc.)
Why Join Us?
Fast-moving environment: We believe in moving fast and iterating quickly.
Work with top experts: Get the opportunity to collaborate with leading industry professionals.
Real impact: Your work will directly shape the future of AI-powered business tools.
Work-life balance: We work very hard but also respect the need to take care of life and family.
Equity and ownership: Be part of a small, high-impact team where your contributions are valued.
If you are an experienced software engineer looking to work in a high-energy, fast-paced, and fun startup, we’d love to hear from you. Apply now and help us shape the future of AI-powered business communication!
Skills Required
- 5+ years of professional experience in full-stack development.
- Strong expertise in React.
- Strong expertise in TypeScript.
- Strong expertise in Node.js.
- Ability to use the latest AI technologies for development, testing, and other tasks.
- Deep understanding of AWS and cloud-based architectures.
- Ability to independently design and architect systems.
- Strong problem-solving skills and ability to move fast in a startup environment.
- Excellent communication skills and ability to work collaboratively in a small team.
- A 'get-it-done' attitude and a bias toward execution over perfection.
- Experience with AWS Amplify.
- Experience working at an early-stage startup.
- Familiarity with automated testing tools and CI/CD pipelines.
- Experience with Identity and Access Management solutions.
- Experience with Authentication and Authorization frameworks (OIDC, OAuth, etc.).
What We Do
Replify transforms how fitness businesses and service-based companies engage with customers through intelligent AI assistants that never sleep, never miss a call, and continuously improve over time. At the intersection of conversational AI and business operations, Replify delivers 24/7 virtual receptionists and sales assistants that handle everything from answering member inquiries to qualifying leads, scheduling appointments, and driving revenue. Our AI-powered team members integrate seamlessly into existing workflows, providing immediate value from day one while learning and adapting to each business's unique needs. What Replify Does: Replify's AI assistants manage both inbound and outbound communications across phone and text, ensuring no prospect or customer inquiry goes unanswered. Our platform handles appointment scheduling, lead qualification, payment collection calls, and customer service questions with natural, intelligent conversations that feel genuinely human. When needed, our assistants execute seamless handoffs to human staff members, ensuring complex situations receive the right attention. The Replify Advantage: Our customers report 10X increases in lead capture, thousands of saved staff hours, and dramatically improved team satisfaction as employees focus on high-value, in-person interactions rather than repetitive phone work. Setup takes minutes, not months—businesses create fully capable AI team members through our intuitive platform, customize them to match their brand voice, and connect to existing systems like CRMs, class schedules, and back-office software. Our Impact: From single-location boutique studios to enterprise chains with 30+ locations, Replify serves fitness centers, sports facilities, and service businesses nationwide. We've been recognized as the 2025 Sibec Award Winner for Best Technology Integration, and our white-label capabilities enable partners to deliver Replify's powerful AI technology under their own brand. Join the Replify Team: We're building the future of business communication, where AI augments human capability rather than replacing it. If you're passionate about conversational AI, enterprise software, or transforming how businesses operate, Replify offers the opportunity to shape an emerging category alongside customers who depend on our technology every single day.
Why Work With Us
Join Replify: We're building the future of business communication, where AI augments human capability rather than replacing it. If you're passionate about conversational AI, enterprise software, or transforming how businesses operate, Replify offers the opportunity to shape an emerging category alongside customers who depend on our technology eve
Gallery
.png)
