Senior Full Stack Engineer (Agentic Search) - Platform

Nebius•New York City, NY

2d•Hybrid

About The Position

Nebius is hiring a Senior Full Stack Engineer for its Platform team to build how developers and AI agents access its agentic web infrastructure. The role is based in the New York office and follows a hybrid arrangement with the NYC team. The team owns the main API gateway, the customer platform for keys, usage and teams, identity and enterprise SSO, and public interfaces including SDKs, CLI, MCP servers and developer tools. The engineer will work closely with product, design and engineers across R&D to deliver customer-facing capabilities and operate them in production.

Requirements

At least 5 years of full-stack engineering experience on customer-facing products or high-throughput APIs, in any mix of frontend and backend.
Strong backend engineering skills, ideally in Python; Go, C++ or C experience is also suitable when paired with some Python experience.
Experience building and operating latency-sensitive, high-QPS APIs, including caching, asynchronous work, queues, retries, rate limiting, long-running jobs and webhooks.
Experience shipping production UI with a modern frontend framework such as React, Next.js or TanStack; TypeScript is preferred.
Experience building data-heavy interfaces such as tables, charts and filters that remain fast.
Ability to ramp up quickly in a complex, mature user-facing codebase, ship safely under real traffic and participate in on-call operations.
Strong product and design sense for both interfaces and APIs.
Ability to own work from design through production, explain trade-offs clearly to partners, navigate ambiguity and use AI tools in development.

Nice To Haves

Experience leading a project or mentoring others.
Experience taking a product from zero to launch.
Experience building API-key issuance and lifecycle capabilities.
Experience building MCP servers or tools for AI agents.
Experience with billing or usage metering platforms such as Stripe, Metronome or Orb.

Responsibilities

Design and ship features end to end, from user interface through supporting services and data.
Build and improve a high-traffic, low-latency, reliable API gateway.
Create fast, usable interfaces for usage, billing and team data, including tables, charts, filters and forms.
Shape the self-service customer journey from signup through activation.
Build and operate production identity and team access capabilities, including OAuth, OIDC, role-based access, SAML SSO and SCIM.
Manage feature access using feature flags for staged rollouts and entitlements after rollout.
Improve public interfaces used by developers and AI agents, including SDKs, CLI, MCP servers and documentation.