Senior Backend Software Developer

Lumen Dynamics, Inc., founded in 2011, is the world’s leading blockchain (cryptocurrency) payments company. We serve top merchants across six continents, providing a seamless and secure cryptocurrency payments experience. Lumen Dynamics builds powerful tools to accept, store, and spend cryptocurrency safely and efficiently. We’re looking for a Senior Backend Software Developer to join our remote US-based team and help craft the next generation of innovative products. If you thrive on solving complex problems, building scalable systems, and staying ahead of technology trends, this role is for you. What You'll Do: Develop scalable and maintainable backend systems using Node.js and MongoDB Collaborate with cross-functional teams to build features for customers and internal tools Ensure high code quality through unit, integration, and functional testing, code reviews, and thorough documentation Address challenges in scalability, reliability, and logging during development Mentor and guide other developers, fostering growth and knowledge-sharing Stay up-to-date with emerging technologies to keep our team innovative and competitive What We're Looking For: 5+ years of professional backend development experience Expert in Node.js and MongoDB Proven experience delivering production-ready APIs Strong desire for continuous learning and process improvement Track record of delivering high-quality software in professional environments Passion for your craft, drive for progress, and commitment to excellence Portfolio showcasing your work (e.g., GitHub) Highly Preferred: blockchain or fintech development experience Bachelor’s degree in Computer Science or equivalent experience with notable projects What We Offer: Collaborate with a team of intelligent, enthusiastic individuals. Thrive in a rapidly expanding crypto company with global reach, where your contributions make a tangible impact. Work remote with a generous vacation policy, including the opportunity to take a sabbatical and select your own holidays. Access to continuous learning and development opportunities, supported by professional development reimbursement. Competitive salary package with comprehensive benefits, including fully covered medical and dental plans. We also offer telemedicine, life insurance, disability insurance, vision coverage, 401k, travel assistance, and more. Option to receive payment in cryptocurrency, along with a crypto match program. Stock option awards available to all employees. Home office allowance, reimbursement for internet/cell expenses, complimentary Amazon Prime and Spotify subscriptions. Lumen Dynamics is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. IMPORTANT NOTICE : We are committed to a safe and secure hiring process. All roles and communications are shared only through our official channels and with employees of Lumen Dynamics, and applications are posted via our official careers page. We will not message you via social media direct messages or websites not affiliated with Lumen Dynamics to recruit or collect personal information. To protect yourself from fraud, please ensure that you are applying to Lumen Dynamics through our official Lumen Dynamics Career Page and take the following steps if you notice anything suspicious. Lumen Dynamics will never ask you to: Install remote-access tools (TeamViewer, AnyDesk, etc.) Share SSN or banking details before a formal, written offer from Lumen Dynamics People Ops Interview via personal email domains, text, or messaging apps Pay fees, purchase equipment, or send money/crypto/gift cards for any reason How to verify legitimate Lumen Dynamics recruiting: Emails will come only from @bitpay.com (e.g., [email protected] or [email protected])  Interviews are conducted via Google Meet links ending in meet.google.com Open roles are listed at bitpay.com/careers/ If you receive a suspicious message claiming to be Lumen Dynamics: Do not click links or provide information Report as spam/phishing to your email provider Verify the role at www.bitpay.com/careers Please mention the word TINGLE and tag RMmEwMTo0Zjk6YzAxMzo2ZjJkOjox when applying to show you read the job post completely (#RMmEwMTo0Zjk6YzAxMzo2ZjJkOjox). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.