Senior Software Engineer Jobs

Senior Software EngineerWe are seeking a Senior Software Engineer to be a primary technical contributor on the Multimode Threat Engagement Simulation Platform. You will own significant portions of the stack end-to-end - building the Julia computation backend, the React/TypeScript/CesiumJS frontend, and the CI/CD pipeline that delivers standalone Windows and Linux artifacts - with a primary emphasis on high-performance and scientific computing. You will work closely with the Lead Engineer on architecture decisions and with domain engineers (RF, EO/IR) to implement their physics models in a performant, maintainable form. This role demands genuine depth in high-performance compute application development. The backend is not a conventional web API - it runs trajectory integration, Monte Carlo simulation across thousands of runs, and real-time surrogate model inference. You should be comfortable profiling and optimizing numerical code, reasoning about parallelism, and making informed trade-offs between simulation fidelity and throughput.ResponsibilitiesImplement and optimize the Julia physics computation server: trajectory integration (RK4/RK45 schemes via DifferentialEquations.jl), SGP4 orbital propagation (SatelliteToolbox.jl), and Monte Carlo driver with View email address on click.appcast.io parallelismProfile and optimize computation-critical paths; benchmark throughput and latency against program requirements (e.g., 10,000 Monte Carlo runs within a defined wall-clock target)Integrate ONNX.jl surrogate model inference for real-time parameter sweep capabilities; ensure inference latency meets theImplement CZML generation from physics outputs - trajectory arcs, satellite orbital paths, coverage footprints - for time-dynamic Cesium visualizationDesign and maintain the mission data model: JSON serialization, versioned file format with backward compatibility, and cross-platform path handling for Windows and LinuxImplement the API layer with well-defined request/response schemas, appropriate error handling, and structured loggingFrontend and VisualizationBuild React/TypeScript components for the mission planning interface: tabbed mission overview, asset and task tree views, mission parameter forms, and the analysis panelIntegrate and maintain the CesiumJS/Resium 3D globe: asset markers, trajectory rendering, satellite ground tracks, coverage footprints, and CZML-driven animation with the Cesium timelineManage frontend application state (mission data, UI state, async physics query results) using appropriate state management patterns for a data-heavy desktop applicationImplement data-driven analysis visualizations - trajectory plots, Pk curves, Monte Carlo distribution charts - using Recharts, Plotly.js, or equivalentDevOps and Cross-Platform PackagingMaintain the CI/CD pipeline in GitHub Actions: automated builds producing Windows NSIS installers and Linux AppImages from a single codebaseManage PackageCompiler.jl sysimage builds for the Julia physics server binary on both target platformsMaintain electron-builder configuration and platform-specific packaging scripts; validate installer behavior on clean Windows and Linux test environmentsImplement build-time embedding of ONNX model files and asset resources; manage versioning of bundled artifactsQualificationsCitizenship: Must be a US citizenClearance: Active Secret ClearanceEducation: B.S. in Computer Science, Software Engineering, Electrical Engineering, Physics, or related STEM fieldYears of Experience: 5+ years of software development experience, with demonstrated depth in at least one of the following areas: scientific computing, numerical simulation, high-performance computing, or data-intensive desktop applicationsPreferred SkillsProficiency in TypeScript/React or equivalent modern frontend frameworkExperience with a compiled or JIT-compiled high-performance language (Julia, C++, Rust, Fortran, or Python with NumPy/Numba/Cython extensions)Understanding of parallel computing patterns relevant to numerical workloads: thread-level parallelism, SIMD, memory-access optimizationExperience with REST API design and implementation as a client-server boundary within a single-machine applicationDirect experience with Julia and the SciML / DifferentialEquations.jl ecosystem; PackageCompiler.jl sysimage generationExperience with CesiumJS, Resium, and CZML for 3D geospatial visualizationFamiliarity with orbital mechanics, trajectory simulation, or atmospheric modeling at an implementation level (not just theoretical)Experience with ONNX Runtime, ONNX.jl, or equivalent ML inference frameworksExperience with Electron and electron-builder for cross-platform desktop deploymentFamiliarity with at least one sensor or physics domain: radar detection, EO/IR performance, acoustic propagation, or multi-sensor tracking - at the level of understanding model inputs/outputs and integrating them correctlyLocation: Colorado Springs, CO or Boston, MA Travel: Approx. 15-20% Remote, Onsite, or Hybrid: Hybrid