Senior Developer

Role Description At ZayZoon, we've built a financial empowerment platform that puts real money in the hands of employees who need it - and the software you write here is what makes that possible. Every feature shipped, every performance fix, and every clean integration is a direct part of how we deliver on that promise to people who are counting on us. As a Senior Developer, you'll own your features end-to-end - from back-end architecture through front-end delivery, testing, and demo - and you'll bring both the speed to experiment and the craft to make those experiments production-ready when they matter. If you care as much about understanding root cause as you do about shipping the fix, this is the role for you. Your impact: Design, build, and maintain core web and mobile application features from back end to front end, owning delivery at every step of the way. Dig into complex engineering problems - scale, concurrency, background processing, data ingestion - and back your solutions with data, not just instinct. Integrate and maintain third-party tools and services, keeping our platform connected, reliable, and running smoothly. Collaborate across Product, Customer Care, and Finance to scope new features, resolve production issues, and ensure what ships actually works in real life. Strengthen the development pod through pull request reviews, pairing on complex stories, knowledge sharing, and mentorship that raises the whole team's game. Use AI to streamline processes, reduce friction, and give time back for the work that matters. Contribute to a secure, well-structured SDLC - writing code that's not just functional but maintainable, tested, and built to last. Qualifications 4+ years of hands-on Ruby on Rails experience with production applications. Solid front-end fundamentals, comfortable with core JavaScript, and experience in React or React Native. Strong SQL and data analysis skills. Deep engineering fundamentals including SOLID principles, domain-driven design, and a solid testing practice. A full-stack mentality, owning features all the way through. Experience with scale and concurrency challenges. Agile fluency including sprint planning, story grooming, and stand-ups. The ability to shift gears between building fast and building clean. Comfort with standard development tooling such as Git, GitHub, and Jira. Benefits Permanently Remote: Work from anywhere, fully remote, forever. Flexible Time Off: Maximum of 6 weeks vacation with a “You-do-You” time off program. Instant Benefits: Access to medical, vision, and dental benefits from day one. Inclusive parental leave top-up, earned wage access, and a supportive culture for lifelong learners. What you can expect from us: Every application will be reviewed by our team - we're committed to giving each application the attention it deserves because we know how important this step is for you. We want to make sure you're always in the loop and will respond to every application. So go ahead and hit that apply button with confidence, knowing that we’re here for you every step of the way! We can't wait to hear from you.