Senior Full-Stack Software Engineer

This is a fully remote role, allowing you to work from anywhere in the world.

About Synthflow

At Synthflow we’re building the easiest way for businesses to create AI-powered phone agents. No coding, no fuss—just smarter automation. We’re passionate about delivering the future of voice technology with lightning-fast, scalable solutions. It’s an exciting time at Synthflow: we’re early, fast-growing, and laser-focused on impact. Join us to do the best work of your career while helping businesses thrive.

About the role

We’re looking for a Senior Full-Stack Engineer to build and scale Synthflow’s core platform.

Your responsibilities will include:

• Build and maintain our full-stack architecture using React/Next.js, Node.js, and to deliver a robust, scalable, and high-performance platform.

• Implement user-facing features and backend services that support our evolving product.

• Collaborate closely with designers, product managers, and other engineers to deliver high-quality, user-friendly solutions.

• Optimize SQL queries and database interactions to ensure efficiency across our application stack.

• Leverage your experience in automated testing and CI/CD pipelines to drive quality and streamline deployment.

• Work in a fast-paced, startup environment where innovation, speed, and scalability are key.

You Have:

• A minimum of 4 years of professional experience as a Full-Stack Engineer with a strong focus on JavaScript/TypeScript

• Extensive experience with React, Node.js, TypeScript, CSS, and Next.js.

• Strong proficiency in SQL and optimizing complex queries.

• Experience with cloud platforms such as GCP or AWS.

• Familiarity with DevOps and containerization tools like Docker.

• Strong verbal and written communication skills, with a track record of effective collaboration in cross-functional teams.

• Contribute to a culture of learning and knowledge-sharing, participating in code reviews and pair programming.

Beyond the basics:

• Experience with Redis and relational databases for caching and data handling.

• Experience with AI Tooling and Framework like Langchain or OpenAI SDK.

• Early-stage startup experience is a big plus, as we value adaptability and innovative problem-solving.

What We Offer:

• Autonomy at speed: High-ownership roles in a fast-moving startup.

• Remote-first flexibility: Contribute from anywhere, on your schedule.

• Cutting-edge technology: Work on what interests you most.

• Career growth: Scale your impact as the company grows.

• Rewarding package: Competitive pay, equity options, and comprehensive benefits that reflect your skills and experience.