Lead Software Engineer

Who We Are Finance leaders choose Billtrust to get paid faster, control costs, and maximize customer satisfaction. As the leader in B2B accounts receivable workflow and payment software, we provide the world’s leading brands with AI-powered solutions across the full AR lifecycle—from invoice presentment and payment processing to cash application and collections. With over 2,600 global customers, more than $1 trillion in invoice dollars processed, and a proprietary network of 13 million buyers, Billtrust delivers business value through deep industry expertise and a culture relentlessly focused on meaningful customer outcomes. We’re an AI-first company, not just in what we build for our customers, but in how we work. Across every function, our teams use AI tools daily to work faster, make better decisions, and deliver higher-quality outcomes. We hire exceptional people, give them cutting-edge AI capabilities, and measure success by the impact they create. If you want to do the best work of your career at the frontier of AI and fintech, Billtrust is the place to do it. Our Values Customers We relentlessly increase value for customer and do the right thing for them. Action We make ‘thoughtfully fast’ decisions, act quickly, cut through red tape, deliver progress not perfection, take ownership and accountability. Team Spirit We put the team ahead of ourselves, foster trust and respect, collaborate with passion, despise toxic politics, value our differences, and celebrate together. Innovation We challenge the status quo, experiment thoughtfully, and are novel and brilliant in what we create. Excellence We love to win, but we hate losing even more. We aspire to be the best and take pride in our work. When we fall short, we own it and come back stronger. Job Summary The Lead Software Engineer sets the technical direction for the Credit Application platform and drives the delivery of strategic, cross-cutting initiatives that span multiple pods and services. As the senior-most engineer in the Credit team, this position is accountable for architectural decisions, platform-level quality, and the technical health of the entire credit application ecosystem — spanning applicant and manager frontends, core services, async workers, and third-party integrations. The Lead Software Engineer partners closely with Engineering Management, Technical PMs, and other Leads to shape the product roadmap, anticipate scaling challenges, and lead the team through architectural evolution. This position drives the team's adoption of AI-assisted development practices, mentors senior engineers, leads production incident response, and represents the Credit team in cross-functional architecture discussions. Job Responsibilities Set and evolve the technical strategy for the Credit Application platform — including architectural patterns, technology choices, data model evolution, and vendor selection Lead delivery of cross-cutting initiatives that span multiple services and pods (e.g., migrations, platform-wide refactors, new vendor integrations) Partner with Engineering Management and Technical PMs to translate business priorities into a technical roadmap with realistic delivery timelines Own architectural decisions at the platform level — data placement (MongoDB vs MySQL vs SQL Server), service boundaries, async vs sync patterns, third-party integration strategy Lead production incident response for high-severity issues — drive root-cause analysis, coordinate cross-team response, and own post-mortems Drive the team's AI-assisted development practices — establish spec templates, prompt patterns, validation workflows, and quality gates that scale across the pod Mentor and grow senior engineers through architectural reviews, technical coaching, and 1:1 guidance on engineering judgment Lead the technical interview loop for senior and lead candidates; calibrate hiring bar across the team Represent the Credit team in cross-functional architecture forums, vendor discussi…