Ground Software Engineer Senior

York is seeking 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.

Position Details

Team size: 6-8 developers

Remote Policy: Hybrid (4 days in office)

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

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 establish and advocate for engineering best practices across the team

Required Qualifications

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

Willingness to work full-time in our Greenwood Village, CO office

Preferred Qualifications

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