✦ Luna Orbit — Software Engineering

Senior Fullstack Engineer- GrantSeeker

at FLUXX

📍 Remote, US Remote 💰 $153K – $231K USD / year Posted April 09, 2026
Salary $153K – $231K USD / year
Type Full-Time
Experience senior
Exp. Years 10+ years of professional software engineering experience
Education Not specified
Category Software Engineering

FLUXX is seeking a Senior Fullstack Engineer to design, build, and scale Grantseeker Pro and related products. The role includes contributing to system architecture, writing well-tested frontend and backend code, and mentoring other engineers through code reviews.

  • Design, build, and maintain fullstack features
  • Contribute to system architecture and technical decision-making
  • Write clean, maintainable, and well-tested code across frontend and backend
  • Lead and participate in code reviews and mentoring
  • Improve development processes, tooling, and engineering standards

This is a remote full-time senior engineering role focused on fullstack feature development using React, TypeScript, JavaScript, and PostgreSQL. The engineer will help drive architectural decisions to ensure scalability, performance, and reliability while improving development processes and engineering standards.

The ideal candidate is a senior fullstack engineer with 10+ years of professional software engineering experience, strong React/TypeScript/JavaScript skills, and hands-on experience with PostgreSQL. They are comfortable owning features end-to-end, contributing to system architecture for scalability and reliability, and raising engineering quality through code reviews and mentoring.

10+ years of professional software engineering experiencewith strong fullstack development expertiseProficiency in React/TypeScript/JavaScriptExperience working with PostgreSQLDesignbuildand maintain fullstack featuresContribute to system architecture and technical decision-makingWrite cleanmaintainableand well-tested code across frontend and backend systems
fullstack developmentReactTypeScriptJavaScriptPostgreSQLsystem architecturescalabilityperformancereliabilityfrontendbackendcode reviewsmentoringwell-tested code
fullstack developmentReactTypeScriptJavaScriptmodern web applicationsfrontend developmentbackend developmentPostgreSQLsystem architecturescalabilityperformancereliabilitycleanmaintainable codewell-tested codecode reviewsmentoring engineersdevelopment processes improvementtooling improvementengineering standardsGrantseeker Pro platform
strong ownershipproduct mindsetintellectual honestybias toward actioncross-functional collaborationmentorshipengineering leadershipfast execution with high engineering standards
Industry SaaS
Job Function Develop and scale fullstack features for the Grantseeker Pro platform
Role Subtype Full Stack Engineer
Tech Domains JavaScript, React, SQL / PostgreSQL
Senior Fullstack EngineerSenior Fullstack Engineer- GrantSeekerFullstack Engineerfullstack developmentReactTypeScriptJavaScriptPostgreSQLfrontendbackendsystem architecturescalabilityperformancereliabilitycode reviewsmentoringwell-tested codeproduct mindsetbias toward actiondevelopment processesengineering standardsGrantseeker Pro platformnonprofitsgrantmakers

10+ years of professional software engineering experience, Proficiency in React/TypeScript/JavaScript, Experience working with PostgreSQL

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