Staff Software Engineer (Backend) - Web Platform

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 By replacing outdated financial processes with innovative tools, we help businesses—from startups to established brands—make smarter decisions and gain control of their operations.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. Were 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. Make your impact within a rapidly growing Fintech Company Join the Web Platform team, powering innovation across BILL’s product ecosystem with scalable backend services and forward-thinking modernization. As a Staff Software Engineer, youll play a central role transforming service architecture, optimizing reliability, and delivering seamless experiences for BILL’s customers and partners. Step into a high-autonomy environment that values diversity, technical excellence, and creative collaboration. We’d love to chat if you have: • Bachelors degree and 8+ yrs of experience; Masters degree and 6+ yrs of experience; PHD and 3 yrs of experience; or equivalent experience • Deep expertise designing, implementing, and maintaining scalable backend services • Proficiency with Java • Proven ability to architect robust, modern microservices leveraging AWS cloud-native tools (Lambda, ECS/EKS, API Gateway, Secrets Manager, RDS, DynamoDB) • Experience with event-driven, async-first communication via Kafka (Confluent Cloud), including schema enforcement (Protobuf) and CDC patterns • Proficiency in GraphQL (Apollo Server, AWS AppSync, Custom Lambda) for unified UI network layer and federated schema design • Familiarity with both RDBMS (PostgreSQL) and NoSQL/Vector database technologies (DynamoDB, OpenSearch, Weaviate, MemoryDB), especially in cloud environments