Senior Full Stack Engineer

Mill is a waste prevention technology company reimagining what it means to eliminate waste, starting with food. We build smart systems and infrastructure for homes, businesses, and municipalities that transform food scraps from landfill-bound waste into valuable resources, including chicken feed. We are seeking a highly skilled Senior Full Stack Engineer to join our engineering team. This is an individual contributor technical leadership role reporting to the Director of Software Engineering. You will drive the technical direction of your project area and write high-quality code across the stack, while mentoring engineers around you. AI-assisted development is core to how we build software, not a peripheral tool. We expect fluency with tools like Claude Code as part of your daily workflow.

Responsibilities

Lead the technical design and execution of full-stack web applications, ensuring alignment with business objectives and technical standards; Design and implement scalable, secure, and efficient full-stack solutions; Own estimates and technical delivery plans and surface risks early; Craft elegant, documented, and sustainable code spanning our full web stack, remaining ready to provide support for our native mobile environment when required; Develop and optimize API and user interfaces; Use AI-assisted development tools fluently as a standard part of how you write, review, and ship code; Mentor junior engineers, fostering a culture of continuous learning and improvement; Conduct code reviews and provide constructive feedback to maintain high coding standards; Communicate technical constraints and tradeoffs clearly to your project's product manager; Champion best practices in testing, CI/CD, and deployment; Troubleshoot and resolve technical issues, ensuring minimal downtime and disruption; Monitor and optimize application performance

Requirements

5+ years of professional experience in software development with a focus on full-stack development; Deep experience with modern frontend frameworks (e.g. React, Vue, Angular, or SvelteKit); Strong backend experience with TypeScript/Node.js; Comfort with serverless architectures (e.g. AWS Lambda); Solid understanding of SQL and NoSQL database systems; Experience with cloud platforms (we run AWS) and modern deployment workflows; Fluency with AI-assisted development workflows (e.g. Claude Code, Copilot) as a genuine part of your day-to-day practice — not occasional or exploratory use; Strong software architecture fundamentals (e.g. microservices, serverless); Excellent problem-solving and debugging skills; Strong communication and interpersonal skills — especially the ability to partner closely with product without owning the roadmap; Comfortable holding technical ownership of a project over a sustained period, while staying energized by the opportunity to rotate onto new problems periodically; Proactive, self-driven, and eager to take ownership of projects; Passion for mentoring and developing engineering talent

Nice to have

Experience with our specific stack: SvelteKit (web, deployed on Vercel), React Native (mobile), AWS Lambda with CDK (TypeScript) and Middy; Familiarity with DevOps practices and infrastructure as code (e.g. Terraform, CDK); Strong understanding of security best practices in web development; Prior experience working at a hardware company, particularly collaborating with firmware teams — we build physical devices, not just software, and comfort working alongside hardware/firmware engineers is a plus

Benefits

Potential equity grant