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Sr. Software Engineer, Fullstack - Remote

Firstup - Remote - Remote - posted 2026-07-28

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Firstup is an intelligent employee communication platform serving 40 Fortune 100 companies and reaching over 17 million employees daily. The company's mission is to improve the employee experience at every moment that matters, from hire to retire, while delivering engagement insights to help organizations support, promote, and retain talent. We are seeking a Senior Full Stack Engineer to design and deliver large-scale, multi-tenant cloud services with a relentless focus on availability, fault-tolerance, and elegant architecture. In this role, you will be a technical leader who sets the bar for engineering quality and helps elevate those around you. You will work at the intersection of craft and scale, building robust systems that power communications for millions of employees across enterprise customers. This is an opportunity to make a meaningful impact on how work gets done for the world's largest organizations, while working with a team of experts in employee experience, workforce communications, and technology. The ideal candidate is a senior individual contributor with deep full-stack expertise, strong architectural thinking, and a commitment to code quality and system reliability. You should thrive in a fast-paced environment where you can both execute and mentor others.

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