Staff Software Engineer (Backend) Rewards and Reconciliation

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 By replacing outdated financial processes with innovative tools, we help businesses—from startups to established brands—make smarter decisions and gain control of their operations.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.

BILL builds high performing teams and we seek to hire the best talent for every role. We're committed to building a workplace that fosters inclusion and diverse perspectives, valuing each person’s unique skills and experiences. 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 Join our dynamic Rewards and Reconciliation Squad, where we drive the accuracy and integrity of BILL’s financial operations. As a Software Engineer II, you’ll play a key role in building and enhancing systems that ensure seamless rewards processing and precise reconciliation, directly impacting customer trust and business performance.

This is an exciting opportunity to develop your technical skills, collaborate with talented peers, and contribute to innovative solutions in a fast-paced, mission-driven environment.   Responsibilities: Design and build scalable backend services and RESTful APIs that power rewards, billing, and spend workflows, primarily using Elixir.

Analyze and resolve moderately complex technical problems to improve the accuracy of existing financial systems and processes. Collaborate cross-functionally with product managers and stakeholders to translate complex business needs into high-quality technical solutions. Write clear, maintainable code and technical documentation to support ongoing system reliability, scalability, and observability.

Deploy and operate microservices in AWS, and managed services to ensure security and efficiency. Participate in code reviews and advocate for engineering best practices across the software development lifecycle. Improve service performance and reliability through strong instrumentation, monitoring, and alerting practices (using tools like Splunk or Datadog).

Mentor junior engineers and foster a culture of continuous learning and innovation   We’d love to chat if you have: Requires a minimum of 8 years of related experience with a Bachelor's degree; or 6 years and a Masters degree; or a PHD with 3 years of experience; or equivalent experience 6+ years of software development experience building large-scale, complex applications.

Solid understanding of CS fundamentals, including Data Structures, Algorithms, Computer Networking, and Databases. Proficiency in an object-oriented or functional language, with a strong preference for Elixir. Strong knowledge of SQL Databases, particularly Postgres. Demonstrated ability to break down and solve moderately complex technical tasks.

Effective communication skills with the ability to explain technical concepts to diverse audiences.   Desired Qualifications: Expertise in using Kubernetes and AWS services to build microservices. Experience with Flink, Kafka, or other Event-Driven Systems. Familiarity with observability tools such as Splunk, Datadog, Mixpanel, or LaunchDarkly.

Prior experience in FinTech, banking, or payments.  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. San Jose pay range$180,000—$216,000 USDThe estimated base salary range for this role is noted below for our office location in Draper, UT.

Additionally, this role is eligible to participate in BILL’s bonus and equity plan. 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. Draper UT pay range$153,000—$183,600 USDWhat’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. 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 interviewaccommodations@hq.bill.com. Our Applicant Privacy Notice describes how BILL treats the personal information it receives from applicants.

BILL (NYSE: BILL) is a leader in financial automation software for small and midsize businesses (SMBs). As a champion of SMBs, we are dedicated to automating the future of finance so businesses can thrive. Hundreds of thousands of businesses trust BILL solutions to manage financial workflows, including payables, receivables, and spend and expense management.

With BILL, businesses are connected to a network of millions of members, so they can pay or get paid faster. Through our automated...