Senior Software Engineer, Integrations & DX

Justworks, Inc.; New York (NY); On-site; USD 188,000 - 242,000; Full time

Job summary

Justworks, Inc. in New York City is seeking a Senior Software Engineer for Solutions Engineering to drive partner integrations, design robust API-driven experiences, and build developer-facing tooling and documentation.

You will own multi-surface journeys, collaborate with Public API Engineering, Product, Security, and Support to reduce developer friction, and mentor teammates while delivering observable, secure integrations.

Qualifications

• 5+ years of professional software engineering experience building and operating production systems.
• Strong experience consuming, integrating with, or building HTTP APIs; practical understanding of OAuth 2.0/OIDC, API authentication, tokens and scopes, webhooks, pagination, rate limits, and error handling.
• Experience with backend and/or full-stack web development in TypeScript, Go, Ruby, or Python.
• Experience designing reliable integration behavior: retries, idempotency, asynchronous workflows, data contracts, monitoring, and debugging practices.
• Clear technical writing and the ability to explain architecture and tradeoffs to engineers, product partners, and external developers.
• Evidence of delivering customer-facing or developer-facing experiences with a high bar for usability and documentation.
• Strong collaboration skills and comfort working across Engineering, Product, Partnerships and Sales, Support, and Security.

Responsibilities

• Independently lead technical discovery and solutioning for priority partner integrations, including API research, data mapping, authentication and authorization flows, architecture choices, implementation support, and launch readiness.
• Build and maintain high-quality developer ecosystem capabilities: portal experiences, documentation tooling, SDKs, sample apps, quickstarts, integration templates, and developer-support automation.
• Create reference implementations and reusable patterns for common integration needs such as OAuth, webhooks, retries, idempotency, error handling, and observability.
• Run technical working sessions with partners, translate complex requirements into clear decisions and action plans, and communicate platform boundaries accurately.
• Work closely with Public API Engineering and Product to identify developer friction, validate proposed API designs with realistic use cases, and deliver concise, evidence-backed feedback.
• Own a multi-surface developer journey or a portfolio of partner integrations from design through delivery, operational readiness, and iteration.
• Improve developer self-service by using support questions, integration telemetry, and qualitative feedback to prioritize documentation, an SDK feature, a product enhancement, or a platform request.
• Review designs and code; mentor teammates; and elevate engineering quality in both internal systems and partner-facing artifacts.
• Collaborate with Security, Support, and other stakeholders to ensure integrations are safe, observable, and supportable.

Skills

API integrations

HTTP APIs

TypeScript

Go

Python

Technical writing

Leadership

Communication

Tools

OpenAPI

OAuth 2.0/OIDC

SDKs

Documentation tooling

Webhooks

Job description

Justworks, Inc. in New York City is seeking a Senior Software Engineer for Solutions Engineering to drive partner integrations, design robust API-driven experiences, and build developer-facing tooling and documentation.

You will own multi-surface journeys, collaborate with Public API Engineering, Product, Security, and Support to reduce developer friction, and mentor teammates while delivering observable, secure integrations.