Site Reliability Engineer

Onyx is building a next-generation prediction market platform where users can trade on the outcomes of sports, crypto, and real-world events - all in one place.

We’re a fast-growing, Series A company headquartered in New York City, backed by Payward, the parent company of Kraken. Our team brings experience from companies including Jane Street, DraftKings, Robinhood, and xAI. We move quickly, think from first principles, and care deeply about building reliable products that can operate at scale.

The Role

We’re looking for a Site Reliability / DevOps Engineer to own and strengthen the infrastructure behind Onyx.

You’ll work closely with our engineering team to improve the reliability, scalability, security, and observability of our systems. This is a high-impact role for someone who wants real ownership, enjoys solving complex infrastructure problems, and is excited to build the foundation of a rapidly scaling financial platform.

You won’t be maintaining a finished system - you’ll help shape how our infrastructure is designed and operated as the company grows.

What You’ll Do

• Design, build, and maintain reliable, scalable infrastructure across AWS
• Own deployment systems, CI/CD pipelines, infrastructure automation, and production environments
• Manage infrastructure using Terraform and establish strong infrastructure-as-code practices
• Improve observability across the platform using Datadog, logging, metrics, tracing, and alerting
• Support services running across ECS, Fargate, Lambda, SQS, Aurora, and related AWS technologies
• Partner with engineers to improve application performance, resilience, and operational readiness
• Build systems that reduce manual work and allow the engineering team to ship quickly and safely
• Lead incident response, root-cause analysis, and long-term reliability improvements
• Establish best practices around uptime, disaster recovery, security, and capacity planning
• Identify infrastructure risks before they become production issues

What We’re Looking For

• 2+ years of experience in Site Reliability Engineering, DevOps, Infrastructure Engineering, or a similar role
• Strong hands-on experience working with AWS in production environments
• Experience with Terraform or another infrastructure-as-code tool
• Experience building and maintaining CI/CD pipelines
• Familiarity with containerized services and platforms such as Docker, ECS, Fargate, or Kubernetes
• Experience with monitoring and observability tools such as Datadog
• Strong understanding of networking, cloud security, databases, and distributed systems
• Ability to troubleshoot complex production issues across infrastructure and application layers
• A high level of ownership and comfort operating in a fast-moving startup environment
• Clear communication and the ability to collaborate closely with software engineers

Nice to Have

• Experience supporting trading, financial, gaming, sportsbook, or other high-throughput systems
• Experience with PostgreSQL or Amazon Aurora
• Familiarity with TypeScript or Node.js services
• Experience designing systems with strict uptime, latency, or security requirements
• Experience preparing infrastructure for rapid user and transaction growth

Why Onyx

• Meaningful ownership over the infrastructure of a rapidly scaling platform
• The opportunity to build foundational systems instead of inheriting layers of legacy process
• A small, highly technical team with direct access to company leadership
• Competitive compensation and meaningful equity
• A fast-moving environment where strong performance is recognized and rewarded quickly
• The chance to help define a new category at the intersection of markets, technology, and culture

Onyx is an equal-opportunity employer. We value different perspectives and are committed to building a team based on talent, curiosity, and impact.

Please note: Candidates must be authorized to work in the United States. Onyx is unable to provide visa sponsorship for this position.