Senior Engineer, AI Tools Platform (MCP & Harness)

Qase; Delaware; Remote; USD 140,000 - 210,000; Full time

Job summary

Qase is seeking a Senior Engineer to own the MCP server and Harness plugin development, enabling AI agents to connect with our test management platform. You will design robust APIs, schemas, and tooling, ensure safe defaults and audit trails, and ship production-ready features that customers rely on.

This is a full ownership role with direct impact and fast feedback in a remote-first team. The role emphasizes hands-on coding, API design, and collaboration with a distributed customer base, making

Qualifications

• 10+ years of software engineering experience.
• Track record shipping developer-facing products (CLIs, SDKs, public APIs, IDE extensions or plugins).
• Daily hands-on use of coding agents like Claude Code or Cursor; understanding tool usage and failure modes.
• Strong API design experience.
• Product sense: decide what to build from how people use it, not just tickets.
• Quality mindset: verification matters as much as writing.

Responsibilities

• Own the Qase MCP server end to end.
• Build Qase Harness: the plugin that packages Skills, Context and Standards for agents.
• Design tool surfaces with clear schemas, token-efficient responses, and safe defaults.
• Evolve CLI (qasectl), API and reporters for in-loop querying and CI visibility.
• Build verification loops checking agent changes against coverage and past failures.
• Set up evals for tools and skills as CI gates; measure tool-call success, latency, and adoption.
• Audit agent actions with an accessible audit trail.

Skills

Software engineering

APIs design

Developer experience

English proficiency

Tools

Playwright

pytest

JUnit

Cypress

Job description

Qase is seeking a Senior Engineer to own the MCP server and Harness plugin development, enabling AI agents to connect with our test management platform. You will design robust APIs, schemas, and tooling, ensure safe defaults and audit trails, and ship production-ready features that customers rely on.

This is a full ownership role with direct impact and fast feedback in a remote-first team. The role emphasizes hands-on coding, API design, and collaboration with a distributed customer base, making