Nium

Senior Fullstack Engineer

Nium

full-time

Posted on:

Location Type: Hybrid

Location: San Francisco • California • United States

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Salary

💰 $148,000 - $185,000 per year

Job Level

Senior

Tech Stack

DockerJavaJavaScriptNext.jsNode.jsReactSpringSpring BootSpringBootSQLTypeScript

About the role

  • Help evolve our fast-prototyping culture to foster innovation and quick market validation
  • Take ownership of the entire application stack and take us through the entire discovery & validation to the customer revenue cycle
  • Be a self-starter and work independently with guidance from Technical mentors and management
  • Strong learning aptitude with demonstrated ability to learn technologies fast and adapt
  • Build user-facing features using React, TypeScript, and Next.js
  • Develop and integrate REST APIs using Java Springboot or Nodejs based technologies
  • Maintain clean, modular, and well-tested code across the stack
  • Contribute to architectural decisions, code reviews, and shared components
  • Optimize for performance, accessibility, and responsiveness

Requirements

  • 4+ years of experience building web applications in production environments
  • Experience with large-scale systems
  • Background in Fintech or global payment systems will be highly preferable
  • Strong knowledge of JavaScript/TypeScript and React/Nextjs
  • Strong focus on Reliability and scalability of applications
  • Exposure to CI/CD and DevOps tools (Docker, feature flags, monitoring)
  • Strong fundamentals in structured programming languages (Java/GoLang/C)
  • Experience integrating with REST APIs and backend systems
  • Solid understanding of frontend fundamentals (HTML/CSS, accessibility, testing)
  • Familiarity with backend concepts (Java/Spring Boot, SQL, containers)
  • Clear, effective communication and collaboration skills
  • Growth mindset — you ask questions, give feedback, and enjoy learning
Benefits
  • Competitive salaries
  • Performance bonuses
  • Sales commissions
  • Equity for specific roles
  • Medical coverage
  • 24/7 employee assistance program
  • Generous vacation programs including year-end shut down
  • Flexible hybrid working environment (3 days per week in the office)
  • Role-specific training
  • Internal workshops
  • Learning stipend
  • Company-wide social events
  • Team bonding activities
  • Happy hours
  • Team offsites
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
ReactTypeScriptNext.jsJava Spring BootNode.jsREST APIsJavaGoLangCHTML/CSS
Soft Skills
self-starterstrong learning aptitudeeffective communicationcollaborationgrowth mindset