Software Engineer, Simulation and Modeling

• Location: Valencia

• Reports to: Reports to: Laboratory Lead & Test Architect

• Employment type: Permanent

• Workplace model: Hybrid

• Employment is subject to applicable security screening (incl. SUPO, where required)

ICEYE is the world leader in sovereign intelligence from space. We deliver persistent monitoring capabilities to detect and respond to changes in any location on Earth.

ICEYE owns the world's largest and most advanced SAR (synthetic aperture radar) satellite constellation. To our customers we provide intelligence with unmatched quality, latency and revisit times, in any weather, day or night. To governments who choose to operate their own constellation we provide this proven capability as a sovereign system.

ICEYE-built constellations serve customers in defence and intelligence, environmental monitoring, insurance and emergency management. We enable fast decisions that contribute to a safer future.

Founded and headquartered in Finland, ICEYE operates globally with over 1000 employees across Europe, North America, the Middle East, and Asia-Pacific.

Your day-to-day responsibilities

• Model the constellation: orbit propagation, cluster geometry, attitude and pointing, antenna beams, access and contact windows, with spacing and timing as swept variables.

• Model the emitters and the theatre: emitters as state machines with real antenna patterns, scan behaviour, modes and duty cycles, placed at order-of-battle density. Start from the lab's real captures and extend synthetically.

• Generate the signals: propagation and link modelling (path loss, delay, Doppler, ionosphere in the low band) and synthetic I/Q per satellite, at a fidelity the RF hardware and the processing chain can consume.

• Own the truth together with the processing team: a truth ledger of every simulated emission, position and time, kept out of reach of the system under test, plus the association and scoring that turn a run into detection rate, false-alarm rate, geolocation accuracy and latency.

• Drive the hardware together with the RF team: provide the geometry and timing the channel simulator and playback hardware need, so a recorded radar can be heard by three simulated satellites with the right delays and Doppler.

• Make it a platform: versioned scenarios, seeded and reproducible runs, provenance on every result, tests, CI, documentation and an interface that non-authors can use.

• Answer real questions: capacity, revisit and performance studies for the payload, product and sales teams, and architecture trades for future generations.

• Strong software engineering in Python (and ideally a compiled language): clean architecture, version control, testing, code review, packaging

• Experience building a simulation or model of a physical system that others used, and validating it against measurement or real data

• Numerical and scientific computing: NumPy/SciPy or equivalent, vectorisation, performance awareness

• Working knowledge of at least one of orbital mechanics and access computation, RF link budgets and propagation, or signal processing

• Habits that make results reproducible: seeds, configuration management, data provenance

• Clear written and spoken English

• Constellation, mission or system-level modeling and simulation (STK, Orekit, GMAT, Basilisk or in-house)

• Radar, EW or emitter modeling; scenario or order-of-battle generation

• TDOA/FDOA/AoA geolocation or estimation theory

• Synthetic I/Q generation, GPU acceleration, or real-time and hardware-in-the-loop interfaces

• Cloud-native deployment, containers, workflow orchestration, and data stores for large runs

• A simulation framework of yours that outlived your involvement in it

• Eligibility for national security clearance (an advantage)

• 6 months: a first end-to-end scenario (cluster geometry, a handful of emitters, synthetic I/Q per satellite, truth logged, a first score) is used to answer at least one real capacity or performance question.

• 12 months: a reproducible, documented framework runs without you on the team; geometry drives the RF channel simulator; real captures enter scenarios alongside synthetic emitters.

• 24 months: the simulation is part of the end-to-end loop with the flatsat and ground pipeline, runs in regression, and backs performance numbers we put in front of customers.

• Application Screening

• TA call

• Hiring Manager call

• Onsite interview