Ground Software Engineer Senior

York Space Systems is seeking a Senior Full Stack Software Engineer who is passionate about building software thatpushes the bounds ofwhat'spossible. Our software is a modern web-based application (React/TypeScript, C# .NET) with a microservice infrastructure (Docker, Kafka, REST) that operators use tomonitorand control constellations of spacecraft across several active missions.

As a senior member of the team,you'lltake end-to-end ownership of complex features, drive technical planning and breakdown, and actively invest in the growth of the engineers around you.You'llwork closely with engineers, satellite operators, customers, and UI/UX to tackle hard problems like:

• Collision avoidance,conjunction analysis, and orbit-raising maneuver planning
• Operation center failover and continuity of control
• Cross-satellite network maintenanceand space-to-ground link management
• Ground station contactscheduling and pass optimization
• Multi-vehicle mission coordination

Your work will be integrated with our in-house simulation software and deployed in Mission Operation Centers where it directly supports active missions in orbit.

Priorspace-industryexperienceisnotrequired.

PositionDetails

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

Responsibilities

• Develop key user-facing features to support both current and future missions using TypeScript, React, C#, MSSQL,InfluxDB, Kafka, and Python
• Translate designs and requirements into high-quality, maintainable code
• Build reusable components, shared libraries, and scalable services for use across the platform
• Engineer algorithms and business logic to promote scalability and automation
• Write unit tests and documentation for internal users and customers
• Write integration tests against simulation tools to validatebehavior against realistic mission scenarios
• Participate in agile ceremonies including sprint planning, standups, and retrospectives
• Other duties as assigned

Team Leadership

• 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 establishand advocate for engineering best practices across the team

RequiredQualifications

• Bachelor's degree in Computer Scienceor related field
• 6+ years of full-stack software engineering experience
• Deep expertisein strongly typed backend languages, particularly C#, including multithreaded applications, concurrency patterns, and near-real-timedata handling
• Strong proficiencyin modern React and its core principles, includingcomponentarchitecture and performance optimization
• Experience designing and consuming REST APIs at scale
• Experience with SQL databases, including schema design and query optimization
• Proficiencywith common front-end tooling such as Yarn, Babel, and Material-UI
• Experience with Git in a collaborative, multi-contributor environment
• Demonstrated ability to mentor engineers and drive code quality through reviews and design discussions
• Proven ability to collaborate across engineering, design, and operational stakeholders
• Exceptionnal 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

PreferredQualifications

• Experience working across a polyglot stack including Python, Kafka, andInfluxDB
• Experience with modern state management tools such as TanStackQuery
• Experience designing and executing forward and backward compatible database migrations and deployment strategies in live production environments
• Experience with feature flagging strategies, including gradual rollouts, environment-based toggles, and flag lifecycle management
• Experience with container-based installation and deployment strategies, including Docker and CI/CD pipeline integration
• Experience managing backend caching layers, including cache invalidation strategies and distributed cache patterns in resource-constrained environments
• Familiarity with modern security practices including API token management, CUI or classified information handling, and/or air-gapped environments