Full Stack Software Engineer

Full Stack EngineerYork 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 most 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're looking to expand our team across the board.The Simulation, Integration, and Test (SIT) department plays a pivotal role in ensuring the successful deployment and operation of satellites by supporting Flight Software, Ground Software, Vehicle Test, and Mission Operations.This is a full stack role with an emphasis on both frontend and backend. Our full stack web applications are operational, user facing products, that needs to be highly reliable. We want someone who wants to be close to their users and iterate with them directly.This role develops and maintains a full-stack application suite that York's test organization runs on. One is our test execution platform and the entry point for all testing across the organization, used by engineers on the production floor to run mission critical tests on real spacecraft before they ship. Another platform is the test artifact management and visualization application for our system of recording test data, capturing results from CI/CD and the production floor and turning them into the dashboards, metrics, and reports that internal teams and customers depend on. The other platform is our full-stack UI/UX for fault injection, simulation control, and visualization of our spacecraft simulation. Together they cover the full arc of a test: run it, see it, and prove what happened.We are looking for an experienced engineer to be a key contributor on these platforms, with the opportunity to grow into broader ownership over time.ResponsibilitiesDevelop and extend backend services for mission critical test execution, including data modeling and query optimizationBuild and maintain user facing interfaces, including real time views into running testsIntegrate products with lab, ground, and test infrastructure owned by other teams across the companyWork directly with test engineers on the floor to gather feedback, understand how tests actually get run, and iterate on the platform based on what you learnTranslate high level designs and requirements into high quality, production ready code across the stackDevelop automated tests for our products and the systems it interfaces withSupport test like you fly, test driven development for spacecraft flight software, ground software, and space vehicle integrationWrite and execute test plans, procedures, and reports in collaboration with other York developersTriage and fix bugs across a TypeScript monorepo: a Node (Hono) API server with Postgres persistence, a React frontend, and a Kafka/NATS ingest path.Build and maintain CI/CD pipelinesTroubleshoot and debug full stack products and its supporting tools and infrastructureProvide technical direction to more junior engineers, and create documentation and user guidesCommunicate complex technical topics to non-technical audiencesRequired QualificationsBachelor's degree or greater in Computer Science, Aerospace Engineering, or related field2+ years of professional software engineering experienceStrong full stack fundamentals, with backend development as the primary strengthDemonstrated proficiency with PythonDemonstrated proficiency with JavaScript/TypeScript and React or equivalentExperience designing and building REST APIsExperience with relational databases, data modeling, and query optimization (we use PostgreSQL)Experience integrating with systems and APIs owned by other teams or third partiesExperience shipping user facing features, gathering feedback, and iterating quicklyExperience supporting a production application with an active user baseExperience with Docker, Docker Compose, and containerizationExperience building and maintaining CI/CD pipelinesProficiency in a Linux environment, including bash scriptingOwnership of the full software development lifecycle: planning, execution, code review, and release, using Git and modern Agile practicesPreferred QualificationsDomain experience with procedure execution, workflow engines, MES, or laboratory/test softwareExperience migrating users off a commercial off the shelf toolsExperience with real time interfaces (WebSockets, telemetry or event streaming)Experience working alongside hardware, in a lab, or in a test floor environmentExperience with agentic or AI assisted software development workflowsExperience deploying to air gapped or restricted network environmentsExperience with end to end, system level automated testingExperience with Software in the Loop (SITL) and/or Hardware in the Loop (HITL) test systemsExperience with embedded systems, networking, and pub/sub message middlewaresInterest in 3D graphics or mapping (three.js, deck.gl, WebGL, MapLibre)Experience with C++Proficiency with GitLab and its CI/CD toolingSelf starter with the ability to pick up new concepts quicklyAbility to obtain a Security Clearance (Secret or above)In compliance with local law, we are disclosing the compensation, or a range thereof, for roles in locations where legally required. Actual salaries will vary based on several factors, including but not limited to external market data, internal equity, location, skill set, experience, and/or performance.Benefits100% employer-paid medical, dental, and vision insurance (subject to spousal surcharge).Company holidays, floating holidays, and sick time.Unlimited PTO.Generous 401(k) match.York Space Systems provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, military or protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Must have permanent authorization to work in the United States. This policy applies to all terms and conditions or employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. YORK SPACE SYSTEMS IS AN EEO EMPLOYER.