We're looking for a Staff Fullstack Engineer with a strong backend focus to help build and scale the systems that power our Developer and Enterprise APIs. While you'll work across the stack when needed, the majority of your time will be spent designing, building, and scaling backend services that bring our ML-powered voice technology to customers.
Your Impact

You will play a critical role in bringing our world-class ML audio models to market through robust, scalable backend systems and APIs. Your work will directly impact both our product velocity and our ability to serve enterprise and developer customers.

You will:

• Develop and iterate on early-stage products that are key to Modulate's success
• Build and evolve the backend services that power our Conversation Intelligence Platform
• Expand the capabilities and use cases supported by our APIs
• Improve scalability, reliability, and performance across core systems
• Establish strong architectural foundations for long-term growth
• Accelerate Modulate's ability to serve both enterprise and developer customers

What You'll Do

• Collaborate with engineers and product leaders to scope, design, and deliver new platform capabilities
• Design, build, test, and deploy backend services and APIs that power customer-facing products
• Build frontend functionality where needed to create seamless end-to-end product experiences
• Maintain and operate production systems to ensure reliability, scalability, and performance
• Debug complex production issues and continuously improve system stability
• Contribute to architecture decisions and engineering best practices
• Mentor teammates through code reviews, design discussions, and technical leadership

What We're Looking For

• Strong experience with object-oriented Python
• Experience designing and building production-grade APIs and backend systems
• Fullstack engineering experience, with a clear strength and passion for backend development
• Experience building greenfield products and scaling existing production systems
• Strong understanding of system architecture, scalability, and distributed systems
• Proven ability to collaborate effectively across engineering teams
• Experience shipping products from concept to production

Nice to Have

• Experience with cloud infrastructure and containerized environments
• Experience working alongside ML or AI teams
• Experience with React or other modern frontend frameworks
• Experience building developer platforms or enterprise products

Benefits

At Modulate, we prioritize people and sustainability-because doing great work requires feeling supported and safe.

Some of our key benefits include:

• Competitive salary + equity
• Full health, dental, and vision coverage
• Flexible PTO, with a strong culture of taking it
• Weekly team lunches with dietary accommodations
• Hybrid work: core in-office days with flexible remote options
• Regular leadership and industry learning sessions
• Support for career development and continued learning
• Up to 8 weeks work-from-anywhere policy
• A deeply inclusive, human-centered culture

Pay Transparency

Modulate believes in transparency as a cornerstone of equity and trust. Compensation for this role is based on seniority, skills, and experience.

Salary: $180,000-$200,000
Equity: Offered
Other Perks: HSA, FSA, 15 company holidays, professional growth resources

This version keeps the Fullstack Engineer title while making it immediately obvious that the role is backend-first, which should attract candidates who enjoy working across the stack but primarily want to build APIs, services, and platform infrastructure.

$140,000 - $170,000 a year