Senior Software Engineer

Senior Software Engineer (Full-Time | San Francisco | Architecture and Delivery)At Dynamism, we partner with breakout startups backed by Sequoia, a16z, and Y Combinator to help them hire engineers with founder energy, people who build fast, think like owners, and thrive in zero-to-one environments.We're hiring a Senior Software Engineer for an AI fintech company modernizing the systems that power business lending. The company is backed by Y Combinator, recently closed a $29M Series A, and is already helping leading US banks automate workflows that have depended on manual processes and legacy software for decades.You will own complex technical decisions across customer deployments and the core product. The role combines hands-on development, system design, customer context, and technical leadership without moving away from code.📍 Location: San Francisco, on-site Monday through Friday💰 Comp Range: $160K to $265K base plus 75th-percentile equity📈 Stage: Series A, $29M round🛠️ Stack: TypeScript, React, Next.js, PostgreSQL, Python, AI and LLM frameworks🏦 Customers: Leading US banks and commercial lendersWhat You'll Own• Architecture for high-impact customer and platform systems• Full-stack delivery across discovery, design, implementation, and launch• Reliability and maintainability in regulated customer environments• Complex integrations with customer workflows and data• Technical standards for fast, responsible product development• Mentorship and engineering patterns that raise the team's execution barYou Might Be a Fit If You…• Have roughly 3 to 5+ years of high-ownership software engineering experience• Have designed and shipped production systems used by real customers• Can make pragmatic architecture decisions under time and information constraints• Are comfortable working across product, engineering, and customer stakeholders• Communicate technical trade-offs clearly and directly• Want senior ownership while remaining a hands-on individual contributorBonus If You've…• Worked as an early engineer, founding engineer, or technical founder• Led a complex customer deployment or platform migration• Built in fintech, banking, enterprise software, or regulated industries• Mentored engineers or established technical standards• Shipped AI-enabled product capabilities into productionTravel: Approximately 3 to 4 days per month. Visa: Candidates must already have unrestricted US work authorization.