Senior Software Engineer (Full Stack) - Developer Platform

Innovate with purpose

At BILL, we believe in empowering the businesses that drive our economy. By replacing outdated financial processes with innovative tools, we help businesses—from startups to established brands—make smarter decisions and gain control of their operations. And we don’t stop there: we’re creating the future of financial automation so businesses can spend more time on what matters.

Working here means you become part of a vision-driven team that’s ready to tackle challenges and build cutting-edge solutions. We value purpose, drive, and curiosity—and we thrive in a fast-paced, ever-changing environment. Whether in one of our offices in San Jose, CA, Draper, UT, or working remotely, BILLders collaborate to deliver real impact for businesses that need more time in their busy weeks.

At BILL, we listen, learn, and lead—fostering collaboration and a drive for continuous growth. We’re committed to building a diverse and inclusive workplace that values each person’s unique skills and experiences. Even if you don’t meet every requirement, we’d love to hear from you—you might be just what we’re looking for, whether in this role or another.

✨ Let’s give businesses more time for what matters.

Make your impact within a rapidly growing Fintech Company

The Developer Platform team is at the ground floor of building the next-gen developer experience at BILL. You will be joining a team of developers who are passionate about APIs, SDKS, and tools that support BILL’s developer community. Your role will entail developing, enhancing, and shaping the architecture of API connectivity solutions.

We’d love to chat if you have:

• A deep appreciation of others' perspectives, excellent communication abilities, and a profound appreciation for the effectiveness of teamwork
• 5+ years experience in designing, developing, and delivering customer centric enterprise level full stack solutions
• Proven hands-on skills with programming experience in Java, multi-threading, event driven architectures, REST, Graph QL, Data Caching Services, DB schema design and data access technologies
• FrontEnd development using Angular/or React using TypeScript
• Expert level programming knowledge in JavaScript (ES6), including writing cross-browser code, writing testable code
• Web: HTML (5), CSS (3), BootStrap/Foundation
• Other: REST, NodeJS, Application scalability
• Knowledge of best practices & patterns for large scale applications in JavaScript
• Efficient DOM manipulation
• Test Driven Development (TDD) methodology, functional programming style. Playwright or Cypress testing experience a bonus.
• Familiarity with modern web services, APIs and SDKs
• A drive and a strong passion for continual learning in the field of engineering, with a particular focus on enhancing developer support capabilities.
• Strong understanding of developer needs and user-centric design principles for APIs.
• Ability to effectively communicate with diverse audiences, from large banking partners to smaller Independent Software Vendors (ISVs) and the broader developer community.
• Proficiency in developing tooling that enhances API usability and developer experience.
• Experience in the payments industry or building payment applications.

Nice to Have

• Experience in the Fintech industry
• Expertise with using AWS services (including Lambda, SNQ, SQS) to build microservices
• Experience in OpenAPI specification

The estimated salary range for this role is noted below for our San Jose based role. Our ranges for each role and job level are based on a variety of factors including candidate experience, expertise, and geographic location and may vary from the amounts listed above. The role is also eligible for a competitive benefits package that includes: medical, dental, vision, life and disability insurance, 401(k) retirement plan, flexible spending & health savings account, paid holidays, paid time off, and other company benefits.

What’s in it for you?

Redefining how businesses automate their work is a fast-paced, exciting, and fun environment. But we also have benefits and perks to ensure the magic isn’t only experienced by our customers, but by our employees as well.

Here is a preview of some of the amazing benefits here at BILL:

• 100% paid employee health, dental, and vision plans (choose HMO, PPO, or HDHP)
• HSA & FSA accounts
• Life Insurance, Long & Short-term disability coverage
• Employee Assistance Program (EAP)
• 11+ Observed holidays and wellness days and flexible time off
• Employee Stock Purchase Program with employee discounts
• Wellness & Fitness initiatives
• Employee recognition and referral programs
• And much more

Don’t believe us? Check out our culture, benefits, and teams on our career site, LinkedIn Life, or YouTube pages.

BILL is an Equal Opportunity Employer that values diversity and inclusion. We believe our best ideas come from the unique stories, perspectives, and experiences of our team members. We welcome people of all backgrounds, abilities, and identities to bring their authentic selves and contribute to our culture.

We are committed to a transparent, inclusive hiring process that reflects our values. If you need accommodations at any stage, please contact [email protected].

Our Applicant Privacy Notice describes how BILL treats the personal information it receives from applicants.