Senior Backend Engineer: Real-Time Workflow Orchestration

MaC VC; San Francisco (CA); On-site; USD 140,000 - 230,000; Full time

Job summary

MaC VC is building serverless systems to orchestrate annotation sessions, matching tasks to annotators, managing work queues, and ensuring quality at scale across a global workforce.

You will own the real-time workflow engine that powers production labeling, with responsibilities spanning session orchestration, performance monitoring, and cross-border collaboration with teams in San Francisco and Nairobi.

Qualifications

• 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 orchestration.

Responsibilities

• 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 utilization.

Skills

Backend development

TypeScript

Node.js

Serverless architectures

Real-time systems

Tools

AWS Lambda

AWS SQS

AWS Step Functions

PostgreSQL

Redis

Job description

MaC VC is building serverless systems to orchestrate annotation sessions, matching tasks to annotators, managing work queues, and ensuring quality at scale across a global workforce.

You will own the real-time workflow engine that powers production labeling, with responsibilities spanning session orchestration, performance monitoring, and cross-border collaboration with teams in San Francisco and Nairobi.