Ground Software Engineer Senior

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.    Position Details  Team size: 6-8 developers Remote Policy: Hybrid (4 days in office)     Key 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    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