As a Senior Fullstack Engineer, you'll design and build features across frontend and backend layers, drive technical design, solve challenges, mentor juniors, and collaborate with teams.
Our Purpose
At Xero, we’re here to help you supercharge your business. We do this by automating routine tasks, surfacing actionable insights and connecting businesses with the right data, advisors and apps. When that happens, we’re not only making life better for small business, we’ll be building a stronger economy that can change the world.
The Opportunity: Shape the Future of Money Movement
Xero reimagined accounting software. Now, we’re reimagining the flow of money itself. We’re making a critical, multi-year investment in our new Payments Platform organization—the engine that will power payments across all of Xero’s ecosystem.
As a Senior Fullstack Engineer on the Payments Platform, you’ll play a key role in building end-to-end systems that redefine how millions of small businesses move money. You’ll work across both frontend and backend layers—contributing to scalable APIs, robust services, and intuitive, performant user experiences. This is a rare chance to join at an early stage, build across the stack, and have a meaningful, visible impact on Xero’s future.
What You'll Bring With You
- 6+ years of software engineering experience, with a proven track record delivering fullstack applications at scale.
- Strong expertise in system design, API development, and building reliable backend services.
- Proficiency in modern frontend frameworks (e.g., React, TypeScript, or similar) and ability to deliver high-quality, user-facing experiences.
- Proficiency in at least one modern backend stack (e.g., C# a bonus, Java, Golang, C++), with experience in cloud-native platforms (AWS a bonus).
- Experience with both SQL and NoSQL databases.
- Ability to drive technical design and lead implementation of end-to-end features across frontend and backend.
- Experience mentoring junior engineers and helping raise the technical bar within a team.
- Familiarity with payments, fintech, or other highly regulated, compliance-heavy domains (preferred but not required).
- Strong problem-solving skills and the ability to work effectively in an agile, collaborative environment.
- Commitment to code quality—experience with frontend and backend testing practices, code reviews, and building maintainable systems.
What You’ll Do
- Design and build end-to-end features: Contribute to both frontend and backend systems, delivering secure, performant, and user-friendly experiences.
- Drive technical design: Lead the design and implementation of features spanning APIs, services, and UIs, ensuring robustness and extensibility.
- Stay hands-on: Write production-quality code across the stack, build proof-of-concepts, and participate in design and code reviews.
- Solve challenging problems: Work on distributed systems, integrations with global payment providers, compliance, and user-facing workflows.
- Collaborate across teams: Partner with Product, Design, Security, and Operations to translate business needs into seamless technical solutions.
- Mentor teammates: Support the growth of junior engineers by sharing knowledge, providing feedback, and modeling best practices.
- Champion operational excellence: Contribute to observability, on-call practices, and monitoring to ensure reliable systems and smooth customer experiences.
- Continuously improve: Stay current with both backend and frontend industry trends, adopting new technologies where appropriate to strengthen the platform.
Why Join Xero’s Payments Platform?
- Massive Impact: Build a global payments platform that is central to Xero’s revenue and customer growth.
- Hard Problems, High Scale: Tackle complex fintech challenges end-to-end—from backend orchestration and compliance to intuitive, secure frontend workflows.
- Early Stage, Real Ownership: Contribute to foundational systems and user experiences that future products and revenue streams will rely on.
- Culture & Growth: Join a team that values excellence, collaboration, and innovation—while supporting your growth to do the best work of your career.
Why Xero?
Diversity of people brings diversity of thought, and we like that. Our human-first culture of respect, fairness, and inclusion is what helps Xeros thrive and work and beyond. Offering very generous paid leave to use however you’d like (plus statutory holidays!), dedicated paid leave to care for your physical and mental wellbeing as well as an Employee Assistance Program to access mental health care for you and your family, employee resource groups, wellbeing programming and allowances, medical, dental, vision, and disability insurance, fertility and family forming financial support, 401k contribution matching, 26 weeks of paid parental leave for primary caregivers, an Employee Share Plan, beautiful offices with snacks and break areas, flexible working, career development and many other benefits that reflect our human value, you’ll do the best work of your life at Xero.
Research has shown that women and underrepresented groups are less likely to apply to jobs unless they meet every single competency or experience. If you are excited about this role, but your past experience doesn't align perfectly, we encourage you to apply anyway. You could be just the right person for this role and Xero. If you have any support or access requirements, we encourage you to advise us at time of application and throughout the interview process.
Top Skills
AWS
C#
C++
Go
Java
NoSQL
React
SQL
Typescript
Similar Jobs at Xero
Cloud • Fintech • Information Technology • Machine Learning • Software
As a Principal Engineer, you'll define the technical direction and architecture for Xero's Payments Platform while mentoring teams and ensuring operational excellence.
Top Skills:
AWSC#C++GoJavaNoSQLSQL
Cloud • Fintech • Information Technology • Machine Learning • Software
The Director of Enterprise will lead the US Enterprise sales team, drive revenue growth, and manage enterprise customer relationships while ensuring sales excellence and strong team culture.
Top Skills:
CRM
Cloud • Fintech • Information Technology • Machine Learning • Software
The role involves demonstrating Xero's payroll solutions, managing relationships with partners, and driving sales opportunities while ensuring customer satisfaction and effective training.
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
