Senior Frontend Software Engineer

York is seeking a Senior Frontend Software Engineer who is passionate about building software that pushes the bounds of what's possible. Our software is a modern web-based application (React/Type Script, C# .NET) with a microservice infrastructure (Docker, Kafka, REST) that operators use to monitor and control constellations of spacecraft across several active missions.

As a senior member of the team,you'llown the frontend experience end-to-end,from design systemmanagementto the real-time telemetry dashboards thatsatelliteoperators depend on in high-stakes environments.

You'llpartner closely with UI/UX, backend engineers, and operators to build interfaces that are fast, reliable, and intuitive under pressure, tackling difficult problemslike:

• Visualizing live satellitestate across a constellation
• Surfacing alerts during critical mission windows
• Designing workflows to transfer data betweenair-gappedenvironments
• Ensuring full UI functionality during the transfer of control between
  
  Mission Operation Centers

You'll also drive frontend best practices across the team and help junior engineers grow their craft.

Prior space-industryexperienceisnotrequired.

• Teamsize:6-8developers
• Remote Policy:
  
  Hybrid(4daysinoffice)

• Lead development of user-facing features using Type Script and React, collaborating closely with UI/UX and backend engineers to deliver cohesive, performant experiences
• Translate designs and requirements into high-quality, maintainable code that meets both functional and visual standards
• Build and own reusable components, shared libraries, and design systems that scale across the platform
• Engineer frontend algorithms and business logic to support scalability, automation, and near-real-timedata presentation
• Write unit tests and documentation for internal users and customers
• Participate in agile ceremonies including sprint planning, standups, and retrospectives
• Other duties as assigned

• Collaborate with engineers, operators, UI/UX, and customers across departments
• Mentor junior and mid-level engineers through code reviews, pair programming, and design discussions
• Contribute to sprint planning, technical scoping, and cross-team alignment on feature work
• Help establish and advocate for frontend best practices and design system standards across the team

• Bachelor's degree in Computer Scienceor related field
• 6+ years of software engineering experience with a strong focus on frontend and web application development
• Deep proficiency in modern React, includingcomponentarchitecture, performance optimization, and state management patterns
• Strong expertise in Type Script and its application in large-scale frontend codebases
• Experience building and maintainingdesign systems and sharedcomponentlibraries
• Proficiency with common front-end tooling such as Yarn, Babel, and Material-UI
• Experience with Git in a collaborative, multi-contributor environment
• Familiarity with backend APIs and the ability to design and consume REST APIs effectively
• Demonstrated ability to mentor engineers and drive frontend code quality through reviews and design discussions
• Proven ability to collaborate across engineering, UI/UX, and operational stakeholders
• Exceptional problem-solving skills with the ability to navigate ambiguous requirements independently and drive to resolution
• Strong verbal and written communication skills, including presenting technical concepts to non-technical audiences
• Ability to thrive in a fast-paced, mission-driven environment
• Active security clearance or ability to obtain one

• Experience with modern state management tools such asTan Stack Query
• Experience with Web Assembly(WASM) for performance-critical frontend workloads
• Experience with WebGL or other canvas-based rendering for data-rich environments
• Experience with offline-first development architecture and local data synchronization strategies