Full-Stack Engineer - Weekend Team
Full-Stack Engineer — Weekend Team Location: Remote Schedule: Thursday–Monday Employment Type: Full-time Onyx is building the consumer trading platform for the speculation economy—bringing prediction markets, sports, crypto, and real-world events into one seamless experience. Following our Series A led by Payward, we’re growing the engineering team behind our real-time trading platform. We’re looking for a Full-Stack Engineer to own critical product development and platform reliability across our Thursday–Monday schedule, when customer activity is at its highest. What You’ll Do
- Build and ship customer-facing features across the frontend and backend
- Develop scalable applications using TypeScript, React, Node.js, and PostgreSQL
- Own projects from technical design through development, deployment, and monitoring
- Build real-time experiences powered by live data and streaming updates
- Integrate frontend applications with backend APIs and AWS-based services
- Monitor platform performance and respond to production issues during high-volume periods
- Improve application reliability, scalability, testing, and observability
- Collaborate with Product, Design, Trading Operations, and Engineering
- Contribute to technical decisions, code reviews, and engineering best practices
- Help create a smooth handoff between the weekend and weekday engineering teams
What We’re Looking For
- 2+ years of professional full-stack software engineering experience
- Strong experience with TypeScript, React, Node.js, and SQL
- Experience building and maintaining production applications
- Solid understanding of APIs, databases, frontend architecture, and cloud infrastructure
- Experience with AWS, CI/CD workflows, testing, debugging, and monitoring
- Comfortable troubleshooting production issues and working across the stack
- Strong product intuition and attention to customer experience
- Able to work independently and take ownership in a fast-moving startup
- Available to work a consistent Thursday–Monday schedule
- Experience with WebSockets, real-time data, fintech, trading, sports, gaming, crypto, or other high-volume consumer products is a plus
Why Onyx
- High ownership over meaningful, customer-facing work
- Competitive compensation and meaningful equity
- Remote position with a consistent Thursday–Monday schedule
- Opportunity to join a fast-growing company at an early stage
- Work alongside a team with experience from Jane Street, DraftKings, Robinhood, xAI, and Harvard
This is a full-time remote position. Candidates must be authorized to work in the United States; we are unable to provide employment sponsorship at this time.