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Staff Software Engineer

HarnessBelfast, United Kingdom
UK
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Harness is an engineering and innovation first company. Our teams take pride in solving complex, computer science problems to empower Software and DevOps professionals.

This is an amazing opportunity to be a Staff Front-end Engineer in a high-growth, high-potential startup. In this role, you will play a pivotal role in  architecting, designing, developing and delivering high quality front-end applications using ReactJS, HTML and CSS, that have a direct impact on the company’s product’s user experience.

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 comprises of 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

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FAQ

Is the Staff Software Engineer position at Harness remote?
Yes. This role was posted on Remote Frontend Jobs, a job board that lists exclusively fully remote positions.
When was this Staff Software Engineer job posted?
This listing was posted on November 24, 2025 and is still open for applications.
How do I apply for the Staff Software Engineer position at Harness?
Use the apply button on this page — it takes you directly to the employer’s application page.

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