cosinetau
Principal Software Engineer and open source maintainer in Seattle with 7+ years of experience building backend, distributed systems, data pipelines, and AI-enabled SaaS products, seeking senior to principal-level roles.
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Principal Software Engineer and Open Source Maintainer with 7+ years of experience as a core contributor to open source platforms. I'm a versatile full-stack developer with deep experience in backend architecture, distributed systems, and building complete data/ETL pipelines. Beyond coding, I am focused on creating business value and bridging the gap between engineering, customers, and operations. I recently led the end-to-end delivery of a multi-tenant B2B compliance SaaS that tracks over 50M retail-ready units per month. I have also authored 10 comprehensive technical proposals for state government projects and deployed an OpenClaw agentic AI system into a phone-support CRM that slashed agent recovery time by 75%. I'm looking for a senior to principal-level role where I can solve complex technical challenges and drive business value. Location: Seattle, WA Remote: Remote, Hybrid, Onsite Willing to relocate: No Technologies: * Cloud: AWS, GCP, Kubernetes, Docker, Terraform, GitLab CI/CD, distributed systems * Languages: Python, Node.js, TypeScript, JavaScript, React, Go, Rust, PHP, Bash * Data: PostgreSQL, MySQL, NoSQL, ETL, Data Warehousing * DevOps/Tools: Git, Linux, Automation, Reliability, Testing, Graph Engineering, Evals * Architecture: Ollama, Microservices, Data Modeling, REST/gRPC APIs, RAG Pipelines Resume/CV: https://content.mashio.net/wp-content/uploads/2026/09/Walther-ResumeA.pdf Email: [email protected]
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