Senior Fullstack Engineer, Conversations AI

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