Senior Full Stack Engineer, Web & Mobile

Role Description

We are looking for a Senior Full Stack Engineer, Web & Mobile to build polished, reliable experiences across the Called platform. This is a full stack engineering role with a strong emphasis on frontend development, responsive web, mobile usability, React, TypeScript, Capacitor, release quality, and user-facing craft.

You should be comfortable working across the stack, but your strongest instincts should be around the user experience:

• How the interface behaves
• How it feels on mobile
• How users move through workflows
• How to ship features that are useful, reliable, and easy to use

A major part of this role will be owning the quality of our web and mobile experiences, which includes:

• Building responsive interfaces
• Testing mobile workflows
• Documenting mobile-specific issues
• Validating fixes
• Understanding app store requirements
• Helping manage release workflows where applicable

We are especially excited about engineers who are AI-forward and use modern tools to:

• Move faster
• Prototype quickly
• Debug effectively
• Improve quality
• Reduce repetitive work

This is a senior individual contributor role, not a people-management role or formal technical lead role.

Qualifications

• 5+ years of software engineering experience, or equivalent experience building and shipping meaningful production software
• Strong experience with React, TypeScript, JavaScript, HTML, CSS, and responsive design
• Experience building high-quality interfaces for desktop, tablet, and mobile users
• Strong understanding of frontend architecture, component design, state management, data fetching, browser behavior, performance, and accessibility
• Experience testing and debugging responsive or mobile experiences across devices, browsers, and screen sizes
• Experience with mobile release workflows, app store deployment, mobile QA, hybrid mobile apps, or app-like web experiences
• Experience working with APIs and contributing across the stack, ideally with Python, Django, REST APIs, PostgreSQL, or similar technologies
• Experience using Git in a collaborative development environment
• Experience using AI-assisted development tools or agentic workflows for coding, debugging, documentation, automation, testing, or productivity
• Strong attention to detail, clear communication, and a willingness to own quality before release
• A passion for building technology that supports a mission-driven organization

Requirements

• Build and improve features using React, TypeScript, React Query, CSS Modules, Python, Django, PostgreSQL, and related tools
• Create responsive, accessible interfaces that work well across desktop, tablet, and mobile devices
• Own frontend-heavy features from planning through implementation, QA, release, and iteration
• Work with backend APIs to fetch, update, validate, and manage application data
• Contribute to backend services, APIs, data models, and integrations when needed
• Test mobile and responsive workflows across devices, browsers, screen sizes, and app environments
• Own QA for mobile issues, including reproduction, documentation, fix verification, and regression prevention
• Help manage mobile release readiness, including build validation, release checklists, app store awareness, versioning, and post-release validation
• Improve frontend architecture, component patterns, state management, data fetching, performance, accessibility, and maintainability
• Use AI-assisted tools for development, debugging, prototyping, documentation, testing, and product iteration
• Participate in code reviews, technical discussions, testing, and team knowledge-sharing

Benefits

• 100% remote position
• Small team with real ownership and influence
• Fast decision-making and minimal bureaucracy
• AI-forward engineering culture
• Strong work/life boundaries
• Generous PTO and 12 paid holidays
• Company-wide shutdown between Christmas and New Year’s
• Health benefits
• Opportunity for rapid growth and mentorship
• Mission-driven work with real-world impact