Top Fintech Software Engineer Jobs in Seattle, WA

Develop full-stack, data-centric applications using Python, TypeScript, React, AWS, APIs, data pipelines, and GenAI capabilities. Responsibilities include designing technical solutions, provisioning data for AI workflows, building ingestion and analytics systems, automating testing, supporting applications throughout their lifecycle, reducing technical debt, and collaborating with data scientists, product managers, and stakeholders in an agile environment.

Build and maintain large-scale data ingestion platforms, pipelines, integrations, and monitoring tools for Redfin’s real-estate inventory data. Develop applications using relational and non-relational databases, spatial data, Kafka, Java, Python, Kubernetes, Jenkins, Airflow, and AWS. The role involves architecture, technical leadership, mentoring, data quality improvements, production support, and possible on-call participation.

Build and operate highly reliable card-issuing systems at Block, focusing on network integrations, ISO 8583 message flows, authorization, clearing, certification, mandates, and production behavior. Lead complex cross-team engineering initiatives, create conformance tooling and shared frameworks, debug protocol-level issues, collaborate directly with card networks, mentor engineers, apply AI-assisted development practices, and participate in on-call support for critical financial systems.

Build and operate highly reliable card-issuing systems at the network boundary. Responsibilities include interpreting specifications, protocols, certifications, mandates, and production behavior; developing production software and conformance tooling; analyzing network messages; driving certification cycles; influencing card networks; mentoring engineers; applying AI-assisted engineering practices; and participating in on-call support for critical financial systems.

Architect and build high-performance distributed infrastructure for batch and streaming data across global regions. Optimize state management, checkpointing, JVM performance, and exactly-once processing. Develop AI infrastructure including vector indexing, agentic workflows, and real-time data streaming. Own the full software development lifecycle, contribute to shared tooling and SDKs, and mentor engineers through technical leadership and design reviews.

Software development intern working with mentors and peers to design, implement, test, document, and review software features. The role involves learning development tools and programming practices, completing simple coding tasks, participating in design discussions and code reviews, incorporating feedback, and building domain knowledge. Candidates need basic Java programming skills, strong analytical and communication abilities, attention to detail, teamwork, documentation, organization, and problem-solving skills. Current Computer Science or related degree students are eligible.

Build responsive Web3 applications, web SDKs, developer tools, reusable frontend components, and internal Customer Success tools. Collaborate with Product, Design, and Engineering to create scalable, accessible user experiences. Contribute to code and design reviews, automated testing, continuous delivery, coding standards, and AI-assisted development practices.

Lead technical direction and architecture for full-stack receiver financial products across web, mobile, backend services, APIs, and integrations. Design scalable distributed and event-driven systems, deliver greenfield customer experiences, integrate money-movement and compliance platforms, and embed security, reliability, observability, and regulatory controls. Mentor engineers, lead design and code reviews, and influence technical strategy across teams while using AI throughout the software development lifecycle.

Design and build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

Lead and build Motive's developer platform to enable AI-driven, agentic development: cloud sandbox infrastructure, CI/CD and build systems, testing frameworks, developer experience, LLM/agent evaluation, governance, multi-region operation, and manager-of-managers leadership to increase engineering velocity and quality.