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# Software Engineer - Platform Foundation

- **Company:** BLEND LLC
- **Location:** United States
- **Experience:** Expert
- **Salary:** $124,000.0 - $146,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Audit Trail, User Authentication, Cloud Computing, Databases, Continuous Integration, Software Debugging, Distributed Systems, Multi-Factor Authentication, Python (Programming Language), Key Management, PostgreSQL, Automation of Marketing, MongoDB, Node.Js, OAuth, OpenID, Role-Based Access Control, Security Assertion Markup Language (SAML), Session Management, Software Engineering, TypeScript, Workflow Management Systems, Datadog, Data Storage Technologies, Cloud Platform System, Large Language Models, Backend, Agentic-AI, Event Driven Architecture, Kubernetes, Restful APIs, Human in the Loop, Docker, Golang
- **Published:** October 27, 2026
- **Apply:** https://www.adzuna.com/details/5882260796

## About the Role

* 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.

## Description

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.
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