Staff Software Engineer - UI in Belfast

Harness Belfast, Northern Ireland, United Kingdom

We are hiring a Staff Software Engineer – UI at Harness.

Harness is a high‑growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers’ pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs.

Key Responsibilities

• Lead the design and development of user‑friendly and responsive user interfaces for the product using ReactJS, CSS and HTML.
• Collaborate with cross‑functional teams that comprise UX designers, Product Managers, Backend Engineers, Devops and Customer Success to create and ship elegant, high quality web applications.
• Contribute to the integration of micro frontends to ensure modularity and scalability in the front end architecture.
• Participate and contribute in key discussions related to user experience and end to end functional design of features.
• Quickly understand and be able to diagnose/troubleshoot complex systems/code and own key pieces of the system.
• Participate in peer reviews of specifications, design and code.
• Mentor junior engineers and drive best practices in front‑end development.
• Own E2E from design, development to deployment of code using Docker and CI/CD processes.
• Drive improvements in overall development processes, quality, identify key technical gaps and work closely with engineering leadership to prioritize and address.
• Stay updated with latest industry trends and emerging technologies to continuously improve our front end solutions.

Qualifications

• Proven experience as a Front end Engineer, with strong portfolio of work using ReactJS, Typescript, HTML, CSS.
• Experience with performance debugging, front end caching and benchmarking.
• Good problem solving and debugging skills.
• Experience with building intuitive UI for analytics products will be a perfect fit.
• Experience with building micro‑frontends and relevant patterns is a huge plus.
• Familiarity with Docker and CI/CD processes is a huge plus.
• Entrepreneurial spirit, priding yourself on getting things done with a high level of quality.
• Strong desire to work in an unstructured, fast moving startup environment.

Bonus Qualifications

• Experience with Infrastructure as code (Terraform etc).
• Experience of contribution to Open Source Projects.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

Software Development

Location

Belfast, Northern Ireland, United Kingdom

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.