Senior Staff Software Engineer

Quick Facts

• Compensation: 9,600–12,000 USD per month (B2B)
• Role: Senior Staff Software Engineer (architectural leader and individual contributor)
• Scope: Technical ownership across six core product squads and a platform transition from monolith to modern distributed, event-driven, domain-oriented architecture

Description

As a Senior Staff Software Engineer, you drive the long-term technical vision of the platform and guide how scalable, reliable systems are designed, built, and evolved across multiple squads. You partner with Engineering leadership as a primary technical expert, taking ownership of the most complex technical challenges while mentoring engineers. You play a key role in transitioning from a monolithic Ruby on Rails application toward a modern distributed, event-driven, domain-oriented architecture.

Responsibilities

• Act as the Engineering Director’s technical eyes across multiple squads; proactively surface risks and concerns and review suspicious code, PRs, or designs with clear findings
• Drive application performance, quality, and responsiveness across core domain systems
• Collaborate with cross-functional teams and architects to design high-performance, scalable, and reliable architecture
• Establish subsystem boundaries and recommend where functionality should live across subsystems
• Develop and maintain code quality standards; conduct code and architectural reviews; coach teams on standards aligned to system design principles
• Proactively identify architectural enhancements and strategic refactorings to improve scalability and maintainability
• Guide teams in designing automated tests at optimal architectural layers to maximize signal and reduce brittleness
• Maintain and improve CI/CD environments
• Mentor engineers across the organization to elevate technical capabilities and domain knowledge
• Lead cross-squad initiatives and represent domains in company-wide architecture discussions (e.g., sharding, identity and access management, monolith decomposition)

Requirements

• 9+ years of experience designing, building, and operating complex production systems
• Deep experience with backend frameworks: Ruby on Rails, Django, or Spring Boot
• Proficiency in multiple programming languages: JavaScript, Python, Go, Java, or Node.js
• Deep expertise with cloud platforms (AWS), containerization, and serverless/cloud-native architectures
• Proven success applying Domain-Driven Design (DDD) principles across multiple teams or domains
• Experience architecting event-driven systems with distributed messaging tools: Kafka or SQS
• Experience defining and improving CI/CD pipelines (Jenkins, GitLab) and automated testing strategies
• Expertise in scalable API design and management: RESTful APIs and/or GraphQL
• Strong background in observability and performance diagnostics
• Proven experience using AI tools and automation to improve team efficiency or output quality
• Bachelor’s degree in Computer Science/Engineering or equivalent work experience

Benefits

• Paid holidays and flexible scheduled time off
• MacBook setup from day one plus a $500 workspace stipend
• Central European Time (CET) hours to support a balanced schedule
• Equity in a rapidly growing startup backed by top-tier VCs