Build the serverless systems that orchestrate Avala's annotation sessions — matching tasks to annotators, managing work queues, and ensuring quality at scale across our global workforce of 15,000+ domain experts. You'll own the real-time workflow engine that powers production labeling.What You'll Do:• Design and build serverless functions (AWS Lambda, Step Functions) for session orchestration• Optimize task matching algorithms that assign work based on skill, quality, and availability• Build real-time monitoring dashboards for annotation throughput and quality metrics• Implement workflow automation for multi-stage QC review pipelines• Scale the sessions system to handle 10x growth in concurrent annotators• Collaborate with operations teams in SF and Nairobi to optimize workforce utilizationRequirements:• 4+ years building production backend systems• Strong TypeScript and Node.js experience• Experience with serverless architectures (Lambda, SQS, Step Functions)• Knowledge of PostgreSQL, Redis, and distributed systems patterns• Experience with real-time systems or workflow orchestrationNice to Have:• Experience with workforce management or marketplace platforms• Familiarity with annotation or data labeling systems• Experience optimizing for latency-sensitive, high-throughput workloads