Senior Fullstack Engineer, Conversations AI

Postscript is redefining marketing for ecommerce companies. By introducing SMS as an entirely new channel for ecommerce stores to engage, retain, and convert their customer base, brands are seeing huge ROI with Postscript. Backed by Greylock, Y Combinator and other top investors, Postscript is growing fast and looking for remarkable people to help build a world class organization. To learn more about postscript, checkout this article from one of our investors, Greylock, on our vision for the Future of Marketing.

Job Description

At Postscript, we’re leveraging AI to revolutionize SMS performance, driving measurable revenue gains through continuous self-improvement, proven by real-time testing. As the online shopping landscape grows, the demand for scalable, personalized customer engagement solutions is unprecedented.

As a Senior Full-Stack Engineer (Front-End Leaning) on the Conversations AI Team, you’ll be at the forefront of innovation, using your expertise in both front-end and back-end technologies to push the boundaries of conversational AI. You’ll focus on rapid prototyping and build intuitive, scalable interfaces that enhance our AI-driven conversational tools, driving real-time engagement with millions of users. Your work will directly impact Postscript’s bottom line and our customers’ success by transforming SMS into their most powerful revenue channel.

This role offers a unique opportunity to blend cutting-edge AI capabilities with modern front-end development practices, contributing to Postscript’s vision of next-level customer engagement.

What You’ll Do:

• Architect, build, and maintain scalable, high-performance full-stack applications, with a focus on intuitive user interfaces using React and TypeScript.
• Collaborate closely with cross-functional teams to integrate LLMs, OpenAI models, and RAG techniques into our platform, ensuring real-time, personalized SMS engagement.
• Rapidly prototype new features and user interfaces, iterating quickly to deliver customer-focused solutions.
• Contribute to backend systems using Python (Flask) and AWS to power our AI-driven tools, ensuring seamless integration with front-end components.
• Lead the design and deployment of highly available, modular systems that scale to millions of users.
• Mentor and guide other engineers, fostering a culture of learning and continuous improvement.
• Balance technical excellence with rapid development to meet the evolving needs of the product and business.

What We’re Looking For:

• Strong experience in front-end development with React and TypeScript, with a passion for building modern, intuitive user interfaces.
• Expertise in full-stack development, with solid experience in Python (Flask) and building scalable backend systems.
• Fluency in CSS, with the ability to create responsive, maintainable, and visually appealing interfaces that align with modern UI/UX principles.
• Minimum 6-8 years of professional software development experience, with 1-2 years at minimum in AI solutions preferred.
• Proven track record of rapid prototyping and delivering high-quality features quickly.
• Experience with AWS architecture, relational databases, and building high-performance APIs.
• Ability to lead app projects from concept to delivery, managing ambiguity and driving results.
• Experience mentoring and leading engineering teams, with a collaborative mindset and excellent communication skills.

What We’ll Love About You

• You’re curious and enthusiastic—you love building things
• Energized by early stage companies and the opportunity to own and improve a new, fast-growing codebase
• You can drive technical decisions by measuring trade offs informed by both business priorities and technical needs
• You have empathy for users and enjoy helping others
• Bonus: Remote work experience. You love working on a remote-first team

What You’ll Love About Us

• Salary range of USD $170,000-$200,000 base plus significant equity (we do not have geo based salaries)
• High growth startup - plenty of room for you to directly impact the company and grow your career!
• Work from home (or wherever)
• Fun - We’re passionate and enjoy what we do
• Competitive compensation and opportunity for equity
• Flexible paid time off
• Health, dental, vision insurance

You are welcome here. Postscript is an ever-evolving place of equal employment for talented individuals.