Senior Software Engineer - Full Stack

About CharterUP. CharterUP is transforming the $450+ billion group transportation and mobility market with an AI native platform that powers modern charter, shuttle, and emerging autonomous vehicle operations. Trusted by many Fortune 500 companies, CharterUP connects enterprises, institutions, and event organizers to thousands of bus operators nationwide, while increasingly serving as the operating system for large scale shuttle and transit programs across airports, campuses, industrial sites, and major events. Through real time availability, transparent pricing, intelligent routing, and AI driven dispatch and optimization, CharterUP replaces a fragmented and opaque industry with automation, accountability, and scale. Why Join Us Innovative Impact: Be part of the team that's revolutionizing group travel, setting new standards in an industry overdue for change. Growth Opportunities: As a hyper growth company and one of the fastest-growing companies recognized by Inc., there’s no better time to join our dynamic, growth-stage organization. Driven Team: Collaborate with some of the most driven minds in tech, all while working in a remote-first environment with a tech hub in Austin, TX. Funding and Stability: Our $60 million Series A funding was just the start—we’re poised for even greater expansion, and you can be part of this exciting journey. CharterUp has achieved this growth profitability and efficiently, ensuring long-term stability. About the Role CharterUP is seeking a Senior Software Engineer (Full Stack, Backend Focus) to architect, implement, and own a wide variety of customer-facing and back-office software systems powering our two-sided marketplace business. You’ll work closely with our engineering leaders, product managers, and engineering team to design and build systems that will scale with our rapidly growing business needs. You will lead a wide variety of technology initiatives across multiple disciplines, including REST API Services, Web Applications, Mobile Apps, Data Engineering, and DevOps. Title: Senior Software Engineer Reports to: Engineering Manager Location: This position is based in Austin, TX (Hybrid: Monday, Wednesday, Friday in-office). What You’ll Do Build high-quality software using JavaScript (Vue, React) on the frontend and Java on the backend, leveraging AI-assisted development tools to improve speed and quality. Deploy robust applications to AWS, ensuring scalability, reliability, and continuous improvement through intelligent monitoring and automation. Define and advocate for engineering best practices, tooling, and development processes, including thoughtful adoption of AI-driven approaches that enhance code quality and developer productivity. Mentor junior engineers, sharing best practices in both traditional and AI-enhanced development techniques, and foster a culture of learning and innovation. Collaborate cross-functionally to align technical implementation with evolving business needs and product vision, identifying opportunities where AI technologies can create value or efficiency. What You’ll Bring 5+ years of professional experience as a full stack software engineer, with hands-on leadership of end-to-end projects in fast-paced environments. Strong frontend development skills using modern frameworks like Vue, React, or Angular. Proven backend experience in JVM-based environments (Java, Kotlin, C#, etc.), delivering scalable and maintainable solutions for real-world customer needs. Solid understanding of cloud infrastructure, especially with AWS, and familiarity with AI-based development or deployment tools. Collaborative team player who thrives in cross-functional teams, embraces emerging AI capabilities, and takes full ownership of complex, high-impact deliverables. Recruiting Process Step 1 - Video call: Talent Acquisition interview Step 2 - Video call: Live Coding Interview Step 3 - Video call: Two Team Interviews Step 4 - Offer & background check Welcome aboard! Salary $140,000 — $165,000 USD Global Benefits & Perks at CharterUP We believe great people can live anywhere—and they deserve great benefits, too. While offerings may vary slightly by location, we prioritize hiring near our hubs in Austin, Atlanta, Miami, and Denver as we grow our global team. Flexible Work Model: CharterUP operates as a remote-first company, with select roles requiring regular, in-office presence based on team and business needs. Role-specific expectations will be shared during the hiring process. U.S.-based employees may reside in any of our 19 approved states. Comprehensive Health & Wellness: Medical, dental, and vision insurance, mental health support, virtual care, gym discounts, and family-building benefits. In the U.S., we cover 100% of premiums for employees. International benefits align with local standards. Time Off to Recharge: Paid time off so you can truly unplug. U.S.: 15 PTO days (increasing to 20 after 2 years) + 8 paid holidays. International policies vary by country. Financial Peace of Mind: Company-paid life, short-term, and long-term disability insurance where available. Performance-Driven Culture: Join a fast-moving, ambitious, and collaborative team that wins together. Referral Rewards: Earn bonuses for bringing top talent to the team. Planning for the Future: Long-term financial planning support. U.S.: 401(k) plan. International: region-specific savings programs where applicable. Top-Tier Tech: Choose a Mac or PC, plus monitor, keyboard, and mouse to hit the ground running. CharterUP is an Equal Opportunity Employer. We are committed to creating an inclusive, accessible, and respectful workplace. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, age, national origin, ancestry, disability, medical condition, marital status, veteran status, or any other protected characteristic in accordance with applicable federal, state, and local laws in the United States and Canada. If you require accommodation during the recruitment process, please let us know. CharterUP is committed to providing reasonable accommodations during the hiring process. If you need assistance or an accommodation, please contact your recruiter. Hiring Locations: CharterUP U.S.-based candidates and employees must reside in one of the following states: Arizona, Colorado, Florida, Georgia, Hawaii, Mississippi, Missouri, North Carolina, New Hampshire, Nevada, New York, Oklahoma, South Dakota, Tennessee, Texas, Utah, Washington, and Wyoming. We hire in the U.S. and Canada and are actively expanding our global footprint.