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Senior Backend Engineer

Full-time

Kollectiv.ai

Role Description

As our Senior Backend Engineer, you’ll design and build the backend infrastructure that supports high-throughput, reliable, and secure AI agent workflows. You’ll work cross-functionally with ML engineers and data scientists to operationalize models at scale.

  • Architect and implement scalable APIs, microservices, and event-driven systems to power ML pipelines and agent orchestration
  • Design efficient data modeling, ETL, and persistent storage suited for high-volume, real-time agent data
  • Optimize backend performance and ensure system stability under heavy concurrent load
  • Collaborate closely with founders and ML teams to deliver end-to-end agent features
  • Establish CI/CD pipelines, monitoring frameworks, and enforce backend security best practices
  • Mentor junior engineers and contribute to team culture and best practices

Qualifications

  • 5+ years designing, implementing, and maintaining backend systems in Python
  • Experience building distributed, scalable services with microservices or serverless architectures
  • Strong grasp of relational and NoSQL databases, message queues (e.g., Kafka), and ETL patterns
  • Proven track record in API design (REST/gRPC), authentication, and reliable asynchronous processing
  • Familiarity with containerization (Docker, Kubernetes) and observability tools (Prometheus, Grafana)

Requirements

  • Prior experience launching AI products or backend systems for ML/agent-driven applications
  • Knowledge of LLM APIs, prompt pipelines, and agent orchestration
  • Familiarity with cloud-native tools (AWS Lambda, S3, DynamoDB, GCP/Azure equivalents)
  • Experience in startup or early-stage environments

Benefits

  • Competitive equity & pay - get in early and own what you build.
  • Work closely with experienced founders with a proven startup track record.
  • Move fast, ship fast - no corporate bureaucracy.
  • Shape the AI revolution in healthcare - massive market, untapped potential.

Company Description

We’re transforming front office operations for healthcare practices through AI-first automation. Think agentic AI that streamlines insurance verification, claim management, pre-authorization, denials management, coding and reviewing notes, and every mundane, repetitive task that bogs down practice staff. Our mission? Free up healthcare professionals to focus on what matters most: their patients.

  • Our founding team has built a couple of unicorns
  • Andrey Akselrod - Founder/CTO at Smartling, Board Member/CTO at People.ai. Coffee & Kettlebells.
  • Sasha Rohachova - Founder at Inkhunter (YC S18), PM at Pinterest (Led AI/ML/CV/AR innovation lab). Competitive Free-diving.

We’re moving fast and need an engineer who thrives in early-stage chaos and loves shipping quickly. If you want to own technical decisions, build 0→1, and shape the future of AI in healthcare, this is your role.

Vacancy posted 9 hours ago
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