Software Engineer - Platform Foundation

What you'll do Design, build, and operate reliable backend services and shared platform capabilities. Lead technical design for APIs, distributed systems, data storage, workflow orchestration, and service integrations. Build secure authentication and authorization systems for users, partners, services, and API clients. Develop and maintain login flows including SSO, OAuth/OIDC, MFA, session management, token lifecycle, and role- or scope-based access control. Improve platform security through strong access controls, auditability, secrets management, tenant isolation, and secure service-to-service communication. Build background-agent systems that automate support and operational workflows while maintaining clear safety controls and human oversight. Develop integrations with collaboration, ticketing, source-control, and internal operational tools. Create safe AI-agent execution patterns, including isolated runtimes, scoped permissions, tool allowlists, approval workflows, and output-safety checks. Improve reliability and operability through monitoring, tracing, incident response, testing, and performance engineering. Partner with product, security, infrastructure, and support teams to turn complex requirements into scalable platform capabilities. Mentor engineers, contribute to technical standards, and lead design discussions across teams. Lead complex projects, make strong architectural decisions, and improve the systems around them. Set technical direction for broader areas, align teams around platform investments, and create leverage through mentorship, standards, and architecture. Technical environment Our work includes: Go, TypeScript, and Node.js RESTful APIs and distributed services PostgreSQL, MongoDB, and event-driven systems Workflow orchestration and asynchronous job processing Docker, Kubernetes, cloud infrastructure, and CI/CD OAuth 2.0, OIDC, SAML, JWTs, MFA, RBAC, API scopes, and service authentication Observability tooling, including metrics, logs, tracing, and alerting AI-agent frameworks, tool calling, secure execution environments, evaluations, and human-in-the-loop workflows What we're looking for 6+ years of professional software engineering experience. Strong backend engineering experience in Go, TypeScript/Node.js, Java, Python, or a similar language. Experience designing and operating production distributed systems, APIs, databases, and asynchronous workflows. Strong understanding of authentication, authorization, sessions, tokens, identity protocols, and secure API design. Experience building secure, reliable systems that handle sensitive data and enforce access controls. Familiarity with cloud infrastructure, containers, Kubernetes, CI/CD, and production observability. Strong system-design skills and the ability to make sound technical tradeoffs. Clear written and verbal communication skills, including the ability to influence across teams. A practical ownership mindset: comfortable debugging production issues and improving systems end to end. Nice to have Experience with AI agents, LLM tool use, automation platforms, or human-in-the-loop systems. Experience designing secure agent runtimes, sandboxing, permission models, or safety controls. Experience with enterprise identity integrations and SSO. Experience with workflow engines, event-driven architectures, or platform engineering. Experience in fintech, security, healthcare, or another regulated industry. Experience mentoring engineers or leading cross-team technical initiatives. Compensation: Base Salary Range: $124,000 – $146,000 (This applies to full time hires. Final offer determined by multiple factors, including but not limited to function, level, geographic location, job related knowledge, skills, and experience.) Bonus (if applicable): Eligibility is contingent upon both company performance against established goals and achievement of individual performance objectives. Equity : Meaningful Restricted Stock Units in public company stock (NYSE: BLND) so you share in Blend’s long-term growth and success. Our Benefits at a Glance We offer a comprehensive and competitive benefits package designed to support your health and work-life balance. Health & Wellbeing We offer medical, dental, and vision benefits, with a generous employer contribution that helps keep your medical insurance costs low. Company-paid life, short-term, and long-term disability coverage Generous PTO, holidays, and maternity/parental leave Employee Assistance Program (EAP): mental health, legal, childcare & eldercare, financial planning, college search, and more Voluntary benefits: accident, critical illness, hospital indemnity, identity theft, and legal insurance Monthly wellness stipend for fitness, mental health, and well-being Additional perks: Milk Stork, pet insurance, and paid volunteer time off Growth & Future 401(k) retirement plan with company match Pre-tax savings: healthcare & dependent care FSAs, Limited Purpose FSA, and HSA