Senior Software Engineer, Platform API

Fractal

2d • Remote

About The Position

Fractal is seeking a Senior Software Engineer, Platform API to drive the design and implementation of platform-level APIs. This role is crucial for serving external customers, partners, and internal product teams. The engineer will own solutions end-to-end, from API design through operations and long-term maintenance, setting standards for quality, reliability, and developer experience. This is a hands-on technical role focused on building robust and user-friendly APIs that enable teams to move faster and customers to trust the platform.

Requirements

• 5+ years of professional software engineering experience, with a strong backend or platform focus.
• 2+ years experience working in AI driven data programs and deployment.
• Proven experience designing and operating APIs for external consumers including versioning, backwards compatibility, deprecation, and SLA grade reliability.
• Strong expertise in Node.js, REST and GraphQL, and relational databases (MySQL, Postgres) in an AWS environment.
• Hands-on experience with authentication and authorization, rate limiting, and multi-tenant data isolation.
• Strong grasp of query patterns, caching, pagination, and common performance pitfalls of data-intensive APIs.
• Experience designing APIs with explicit contracts (OpenAPI/schema definitions) and robust testing strategies.
• Comfort owning systems end-to-end, including monitoring, reliability, and per-customer observability.
• Demonstrated ability to lead technical initiatives, contribute to standards, and influence decisions across teams.
• Excellent communication skills with the ability to translate technical trade-offs to both engineers and non-technical stakeholders.
• Authorized to work in the US without sponsorship now or in the future. We do not sponsor or transfer visas.

Responsibilities

• Design and own platform-level APIs serving external customers and internal teams, with clear contracts, versioning strategies, and integration patterns built for long-term stability.
• Build performance-aware APIs thoughtful query patterns including caching and pagination, that scale safely with real-world data volumes.
• Establish standards for API design, authentication, rate limiting, testing, and observability that hold up to external use.
• Treat developer experience as a first-class concern: clear error semantics, predictable response shapes, accurate documentation, and disciplined deprecation.
• Be a great team member to others across teams and deliver focused outcomes.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed