Software Engineer - Platform Foundations

We are hiring a Senior Software Engineer to build and evolve the foundational systems that power our products. This role focuses on backend platform engineering, authentication and authorization, developer infrastructure, and secure AI-assisted automation.

You will work on high-impact systems used across the organization: identity, access control, APIs, asynchronous workflows, shared services, and background agents that help internal teams investigate and resolve operational issues., * 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., * 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

• 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., * 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.

• 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