Note: The job is a remote job and is open to candidates in USA. Project Blue is an iMessage and SMS marketing platform integrated with leading CRM platforms. The Senior Full Stack Engineer will own meaningful areas across the technology stack, delivering full stack features, improving DevOps and test coverage, optimizing message routing and delivery algorithms, and building AI-powered capabilities. The role will also develop integrations with CRM partners and third-party APIs.

Responsibilities

• You will own meaningful surface area across our stack. That means shipping new full stack features end to end, sharpening our DevOps and test coverage, optimizing backend algorithms that power message routing and delivery, and building AI powered capabilities (think voice cloning, AI voice memos, intelligent message optimization)
• As we expand integrations with HubSpot, HighLevel, Close, and new CRM partners, you will be the engineer who can pick up an unfamiliar API on Monday and ship a production integration by Friday

Skills

• Strong proficiency with Next.js, React, and Node.js in production
• Hands on experience building AI applications, including LLM integrations, prompt engineering, working with model APIs, vector search, or similar
• Excellent SQL skills. You can write, debug, and optimize complex queries without flinching
• Experience working with Amplitude for product analytics, event tracking, and turning data into product decisions
• A track record of building and integrating with third party APIs, especially CRM platforms (HubSpot, HighLevel, Close, or comparable)
• Comfortable across the stack: shipping features, improving CI/CD and DevOps, writing meaningful unit tests, and tuning backend performance
• Fast learner who thrives in a fast moving environment where the integration list keeps growing
• All applicants must be legally authorized to work in the United States without sponsorship
• Experience with messaging infrastructure (SMS, iMessage, RCS, telephony)
• Experience building Chrome Extensions
• Experience building mobile apps with React Native
• Background at an early stage startup
• DevOps depth: Vecel, AWS/GCP, Docker, CI/CD pipelines, observability

Benefits

• Fair equity package with meaningful ownership in a company with real traction
• Remote friendly

Company Overview