Ground Software Engineer Senior

York Space Systems•Greenwood Village, CO

14h•$120,000 - $190,000•Hybrid

About The Position

York Space Systems was founded to radically improve spacecraft affordability and reliability, transforming, and enabling next- generation space mission operations worldwide. Today, York is one of the innovative aerospace companies, specializing in end-to-end customer solutions and the rapid production of spacecraft platforms. York’s complete Space Segment Solution includes spacecraft production, payload integration, system integration & test, launch services, ground segment services, and mission operations, enabling customers to leverage York’s existing technology solutions to get to orbit rapidly and responsively. We are looking for a Senior Full Stack 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/TypeScript, 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'll take end-to-end ownership of complex features, drive technical planning and breakdown, and actively invest in the growth of the engineers around you. You'll work 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 maintenance and space-to-ground link management, Ground station contact scheduling 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. Prior space-industry experience is not required.

Requirements

Bachelor's degree in Computer Science or related field
6+ years of full-stack software engineering experience
Deep expertise in strongly typed backend languages, particularly C#, including multithreaded applications, concurrency patterns, and near-real-time data handling
Strong proficiency in modern React and its core principles, including component architecture and performance optimization
Experience designing and consuming REST APIs at scale
Experience with SQL databases, including schema design and query optimization
Proficiency with 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
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

Nice To Haves

Experience working across a polyglot stack including Python, Kafka, and InfluxDB
Experience with modern state management tools such as TanStack Query
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

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 validate behavior against realistic mission scenarios
Participate in agile ceremonies including sprint planning, standups, and retrospectives
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 engineering best practices across the team