Senior Software Engineer, Full-Stack

RapidSOS • Boston, MA

1d • Remote

About The Position

At RapidSOS, we are committed to using technology to build a safer, stronger future and working together to save lives. We’re in an exciting phase of growth, welcoming new members from across the globe to our mission-driven, ambitious, and inclusive team. Our work is founded on our values of elevating purpose, inventing tomorrow, delivering with urgency, serving with integrity, and winning together, all of which support a company culture where people can innovate, collaborate, grow, and, above all, make an impact.
RapidSOS is ​​the leading public safety AI company that unlocks mission-critical intelligence for first responders and security teams – enabling faster, smarter and more accurate emergency response. Real-time data from the world’s largest safety network of 700M+ devices, 200+ global enterprises, and 23,000+ federal, state and local agencies fuels the RapidSOS HARMONY AI engine that delivers this intelligence to those who need it most. Learn more at www.RapidSOS.com.
Are you excited to build features that make a real-world impact at massive scale, from user interfaces to the services that power them? At RapidSOS, we create technology that helps organizations operate smarter with real-time data — and, in critical moments, powers emergency response by ensuring life-saving information reaches those who need it most.
We’re seeking a Senior Software Engineer to build intuitive, visually engaging, and robust user interfaces that bridge the gap between complex technical solutions and real-world challenges. While this role is frontend-focused, you’ll own features end-to-end — delivering seamless functionality from the UI to the supporting services. You’ll collaborate closely with product, design, and engineering teams to evolve a platform used by leading organizations, defining how real-time information is visualized, understood, and acted upon in emergency situations. You'll also play a pivotal role in driving architectural decisions, ensuring our interfaces are scalable, high-performing, and accessible.

Requirements

• 5+ years of professional frontend or full-stack engineering experience with 3+ years of developing rich, interactive, scalable frontend applications with React and TypeScript
• Proficiency with ideally Python – proficiency with Go, node.js, C++/C or a similar language will be considered with willingness to learn Python
• Experience with modern CSS frameworks and libraries such as Styled Components
• Experience building, maintaining, and integrating RESTful APIs and delivering comprehensive end-to-end solutions in a cloud-based environment
• Ideally has experience building AI-driven features or using AI tools to enhance acceleration of development, and is proactive about leveraging emerging technologies
• Strong communication and interpersonal skills; is a team player with a positive attitude
• Highly self-motivated; ability to adapt and learn quickly in a fast-paced environment with a strong sense of ownership
• Cares deeply about the user experience and is able to quickly identify the optimal visual strategies to meet both product and design goals
• Strong proficiency in coding best practices – ability to write clean, maintainable, and testable code
• Demonstrated expertise in problem solving – troubleshooting issues and debugging a large codebase
• Ability and willingness to collaborate in-person quarterly, or as needed

Nice To Haves

• Experience integrating with WebSocket APIs for real-time data streaming
• Experience working with a Map UI provider such as Google Maps or ESRI
• Experience with a JavaScript testing tool (We use Jest, Playwright, and React testing library at RapidSOS but any testing library experience would be helpful!)
• Understanding of JavaScript security best practices
• Familiarity with design handoff tools like Figma

Responsibilities

• Drive the architecture, design, and implementation of new features, leveraging Typescript and Python
• Lead strategic architectural decisions, help drive alignment, and optimize applications for performance, scalability, and accessibility
• Engineer dynamic, responsive user interfaces that combine intuitive, user-centric interactions with polished design for enterprise customers
• Translate design ideas into high-quality, user-focused interfaces that are technically feasible
• Identify opportunities to assess and enhance current applications, including refactoring code and upgrading technologies used
• Collaborate in an agile environment with stakeholders across Engineering, Design, GTM, and Product to develop solutions for RapidSOS products
• Leverage modern AI development tools (Claude Code, Cursor or similar) to accelerate delivery and improve code quality
• Actively participate in code reviews and standups, sharing knowledge, championing best practices, and contributing to the continuous improvement of team processes
• Own meaningful parts of our platform, have an impact, grow with the company

Benefits

• The chance to work with a passionate team on solving one of the largest challenges globally
• Competitive salary and benefits and equity participation
• A dynamic, flexible and fun start-up work environment with a highly talented team

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed