Senior Software Engineer, Full Stack

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 on the AI Teams at Postscript, 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.

This position is fully remote, and Postscript has been a fully remote company since day 1.

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:

• Expert 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