Testlio

Principal Software Architect

US, UK, or EMEA (Remote)

Principal

REMOTE

Testlio is hiring a Principal Software Architect for a fully remote role open to candidates in the US, UK, or EMEA. This is a hands-on individual contributor position focused on shaping the application and platform architecture of Testlio's crowdsourced testing platform, LeoCore™. You will drive the modernization of a core monolith into distributed services, integrate AI/LLM capabilities into customer-facing surfaces, and set architectural standards across the engineering organization. The role requires 15+ years of software development experience, deep expertise in distributed systems and...

Distributed systems design

Cloud-native architecture (AWS)

Microservices / modular service architecture

Event-driven design

Relational and NoSQL databases

AI/ML and LLM integration

CI/CD pipelines

Full-stack development

Security and compliance (ISO 27001)

Asynchronous remote communication

Technical leadership and stakeholder communication

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