Senior Staff Software Engineer, Platform Engineering

SoFi • Seattle, WA

4h

About The Position

We are looking for an experienced Senior Staff Software Engineer to join our Builder Tools engineering organization with a mission to enable SoFi engineers to elegantly solve problems. In this role, you will have the opportunity to directly impact, influence and lead the direction and architecture of our AI-powered software testing experience, and elevate product reliability through testing infrastructure innovations and practices. You will get the chance to lead, define, and take on complex and interesting problems as part of a fast-paced, highly collaborative organization. The ideal candidate will be a mentor, technical leader and a team player who is hands-on and comfortable driving solutions from initial architecture to implementation and adoption with a strong sense of ownership and drive for delivery.

Requirements

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field.
• 8+ years software development experience.
• Experience developing in a cloud environment (e.g., AWS), using containers (e.g., Docker, Kubernetes), cloud-native technologies, service meshes (e.g., Istio, Envoy), CI/CD pipelines and automated testing.
• Deep knowledge of testing practices for micro-services (e.g., multi tenancy, ephemeral test environment, test user and data generation techniques). Deep awareness of testing tools (e.g., Locust, Artillery), frameworks (e.g., Kotest, Mockito) and techniques (e.g., fuzz, property)
• 2+ years of experience using or developing AI tools (e.g., Claude Code, Prompts, Cursor), AI infrastructure (e.g., MCP, RAGs, Vector dbs), agent frameworks (e.g. Agent SDK, Langchain, Langfuse).
• Strong understanding of software design principles, and distributed systems architecture.
• Strong problem solving and programming fundamentals (algorithms, data structures).
• Proven coding skills (e.g., Java, Kotlin, Python) delivering large scale systems with infrastructure automation (e.g., Terraform).
• Ability to own, manage and deliver projects from scoping through launch. Experience working with Agile development processes.
• Excellent written and verbal communication skills. Demonstrated ability to collaborate well with technical and non-technical members, and proven skills to operate effectively in a cross-functional team.

Nice To Haves

• Experience with security, compliance, and risk management in cloud environments.
• Experience with monitoring and logging (e.g. Datadog, Elastic, Coralogix).
• Experience with container orchestration (e.g., Docker, Kubernetes) and networking

Responsibilities

• Technical leadership - Provide thought leadership for the technical strategy, design, implementation, delivery and operations for AI powered agentic testing (autonomous test generation, execution, failure remediation), and foundational test infrastructure (environment, data generation, multi tenancy).
• Innovate - Collaborate with cross-functional teams to drive innovation in testing enablement infrastructure, experience and tooling.
• Exemplary Practitioner - Be a subject matter expert in the testing domain, including outcome KPIs and metrics, and operational excellence.
• Mentor - Collaborate with engineers in the team, provide mentorship, and domain expertise to enhance the overall technical capabilities of the team..
• Continuous Improvement - Contribute to creating a culture of continuous learning, data-driven decisions and improvements. Proactively identify and manage risks.
• Collaborate – Build strong working relationships with coworkers and cross-organizational teams.
• Influence - Influence and scale the adoption of platforms, tools and best practices across the engineering organization.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 1,001-5,000 employees