Remote - US Remote (Country) Full-time USD 120,000 – 190,000 / year

Firstup is hiring a Sr. Software Engineer, Fullstack - Remote

Responsibilities

  • Develop and manage scalable SaaS applications across frontend, backend, and data layers.
  • Write production-grade code that is reliable, readable, efficient, and testable.
  • Elevate engineering standards through thorough code reviews and comprehensive documentation.
  • Design future-ready architectures and proactively address potential issues before they arise.
  • Ensure system availability and performance by investigating, analyzing, and resolving reliability issues across the stack.
  • Identify opportunities and advocate for improved performance and efficiency of software, systems, and processes across teams.
  • Promote a rigorous 'shift-left' quality culture by embedding comprehensive testing—unit, integration, and contract—early and continuously in the development lifecycle.
  • Utilize and advocate for AI-assisted tools such as GitHub Copilot and Claude to accelerate development while maintaining rigorous engineering judgment and accountability for code correctness.
  • Drive team-wide best practices, conduct quality code reviews, and mentor engineers to elevate overall engineering quality.
  • Collaborate with Product and Design to translate requirements into intuitive UI, making informed technical trade-offs in ambiguous situations.
  • Champion engineering best practices across teams and collaborate on solving complex, high-impact problems.

Requirements

  • Bachelor's degree in Computer Science or related field, or equivalent experience.
  • 5+ years building reliable, performant applications and microservices in production environments.
  • Proven full-stack fluency across frontend, backend, and database layers.
  • A polyglot mindset with adaptability to evolving technologies.
  • Proven full-stack experience with frontend (React.js), backend, and database layers.
  • Technical depth in at least one engineering domain: distributed systems, multi-tenant SaaS, application databases, networking, security, serverless, event streaming, or similar.
  • A genuine drive to build beautiful, intuitive products with a customer-focused mindset.
  • Innate curiosity with a desire to learn and teach others.
  • Strong communication skills and openness to collaborative idea-sharing across teams.

Nice to Have

  • Familiarity with Ruby on Rails, TypeScript, Node.js, or React.js is a strong plus.
  • Familiarity with Ruby (including Ruby on Rails), TypeScript, Node.js, or React.js is a strong plus.

Benefits

  • Excellent PTO program
  • Great health benefits
  • Casual and friendly environment
  • Remote work
  • Leadership team that truly believes in your growth – both personally and professionally

Work Arrangement

Remote

Required Skills
Ruby on RailsTypeScriptNode.jsRuby
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Job Details
Location Remote - US
Work mode Remote (Country)
Employment Full-time
Salary USD 120,000 – 190,000 / year
Department Product Management & Engineering – Product Engineering
Category Full-Stack
Posted a month ago
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