Navigation Engineer - State Estimation / Orbit Determination

About Logos Space Logos Space builds a proliferated Low Earth Orbit (pLEO) satellite constellation to deliver resilient, high-performance communications for enterprise and government customers worldwide. The Navigation team develops the software and infrastructure that enable precise spacecraft timing, astrodynamics, orbit determination, and navigation workflows supporting both flight and ground operations. Role Overview The Navigation Engineer for State Estimation and Orbit Determination will design, implement, and validate software that determines the position and trajectory of satellites in the constellation. This work is central to maintaining reliable constellation operations. The role covers both onboard real-time estimation and ground-based orbit determination, as well as supporting tools for analysis and validation. Depending on experience, responsibilities may include ownership of specific segments of the estimation stack or contributing to broader development efforts. Areas of focus include process and measurement modeling, filter design, validation, covariance analysis, estimator integrity, statistical validation, replay, and regression infrastructure. This position is based in Mountain View or San Diego. What You Will Do Develop and maintain proprietary C++ libraries for state estimation, orbit determination, and navigation workflows. Create Python tools or bindings to support analysis, testing, automation, and efficient debugging. Implement and validate models for processes and measurements, filtering and smoothing algorithms, covariance propagation, initialization, gating, and related numerical utilities. Integrate data from GNSS, timing sources, maneuvers, telemetry, and external tracking inputs. Build simulation, replay, Monte Carlo, and regression tools to evaluate estimator performance and detect numerical or integration regressions. Assess estimator behavior for consistency, convergence, observability, initialization, and performance under off-nominal scenarios. Work closely with engineers across flight software, GNSS, astrodynamics, timing, and mission operations to define and implement system interfaces.

About Logos Space Logos Space is building a proliferated Low Earth Orbit (pLEO) constellation to deliver high-performance connectivity for enterprise and government clients worldwide. The Navigation team designs and builds the software and infrastructure that support spacecraft timing, astrodynamics, orbit determination, and other navigation functions used in both flight and ground systems. Role Overview This GNSS Navigation Engineer - Orbit Determination Specialist position focuses on developing GNSS software that converts raw data into accurate navigation products for use in both onboard and ground-based systems. The work includes designing, implementing, and validating key GNSS measurement-processing features essential for the operation of the LEO constellation. Responsibilities cover building core GNSS software for onboard data ingestion, ground-based orbit determination, and supporting analysis and validation tools. Depending on experience, the role may involve leading or contributing to specific areas of the GNSS stack, such as observation modeling, correction ingestion, quality screening, residual analysis, replay, and estimator integration diagnostics. The team values engineers who are comfortable in a fast-moving setting, can turn ambiguous requirements into working software, and enjoy collaborating across disciplines. Main Responsibilities Develop and maintain proprietary C++ libraries for GNSS measurement processing, estimator integration, and navigation workflows. Create Python tools or bindings for analysis, testing, automation, and rapid debugging. Implement and validate observation models and preprocessing for code, carrier phase, Doppler, and timing or clock-related measurements. Develop interfaces for receiver telemetry and external navigation products, including broadcast and precise ephemerides, clocks, biases, atmospheric data, and correction information. Perform data quality screening, timestamp validation, cycle-slip detection, outlier rejection, residual analysis, and diagnostics. Contribute to EKF-based orbit determination and state-estimation pipelines by providing estimator-ready measurements, measurement models, noise models, and health metrics. Analyze innovations, residuals, covariance behavior, and consistency metrics. Location Mountain View or San Diego

Logos Space is an innovative Low Earth Orbit (LEO) satellite system meticulously designed to meet the connectivity demands of commercial enterprises and government entities. We aim to bridge a crucial gap in the market by delivering resilient, high-performance satellite-based connectivity solutions to clients globally. Our business customers benefit from contracts with established performance benchmarks for their broadband needs, and we are committed to integrating these capabilities into our system from the outset. The foundation of our system is built on speed and reliability, ensuring that Logos can extend cloud and data center network connectivity to fixed, maritime, and aerial terminals around the world.Our team at Logos is comprised of highly skilled engineers with extensive backgrounds in networking and satellite technologies, ensuring that we push the boundaries of what's possible in satellite connectivity.Position OverviewIn the role of Precise Orbit Determination Engineer, you will spearhead the architecture and software development for the ground-based orbit estimation service within the Logos Space satellite network. Your responsibilities will include processing a variety of tracking data, such as GNSS observations and ground station ranges, to accurately reconstruct and forecast satellite ephemerides. This critical work facilitates the seamless scheduling of operations and maintenance across the Logos Space constellations.Key ResponsibilitiesEstimation Architecture: Architect and sustain the ground-based Orbit Determination (OD) pipeline utilizing Extended Kalman Filtering (EKF), Least Squares, or comparable batch estimation frameworks.High-Fidelity Modeling: Develop and implement advanced force models including high-degree gravity fields, solar radiation pressure, atmospheric drag, and third-body perturbations to achieve superior prediction accuracy, along with clock parameter estimation.Data Fusion: Create algorithms to integrate and fuse GPS/GNSS and similar PNT source telemetry with ground-based ranging data, producing robust and precise satellite ephemeris estimates.Calibration & Validation: Regularly perform cross-calibration analyses between ground-truth POD and onboard navigation systems to ensure consistency across the fleet.QualificationsEducation: MS or PhD in Aerospace Engineering, Geomatics, or Physics, specializing in Estimation Theory or Astrodynamics.Experience: A minimum of 5 years of experience in orbit determination for LEO satellites.

About Us:Aeva is at the forefront of pioneering cutting-edge perception technologies, with a mission to revolutionize applications ranging from automated driving to industrial robotics, consumer electronics, health, and security. Our innovative approach integrates essential LiDAR components onto a compact silicon photonics chip, enabling our 4D LiDAR sensors to uniquely capture instant velocity alongside 3D positioning. This breakthrough technology empowers autonomous devices, such as vehicles and robots, to make safer and more intelligent decisions.Role Overview:We are seeking a Senior Engineer to join our Calibration, Localization, and Mapping (CLAMS) team. In this pivotal role, you will focus on implementing state-of-the-art methods in state estimation, online calibration, and optimization. Your expertise will be instrumental in deploying Aeva's 4D FMCW LiDAR algorithms into production, thereby enhancing the performance of autonomous driving technologies.

About Logos Space Logos Space is building a proliferated Low Earth Orbit (pLEO) satellite constellation to deliver reliable, high-performance connectivity for enterprise and government clients worldwide. The Navigation team designs and develops the software and infrastructure that underpin spacecraft timing, astrodynamics, orbit determination, and navigation workflows for both flight and ground systems. Role Overview The Astrodynamics Navigation Engineer will help establish the framework for state estimation, trajectory propagation, maneuver planning, and operational decisions that support navigation across Logos Space's flight and ground operations. This work is central to the successful operation of the pLEO satellite constellation. What You Will Do Design, implement, and validate core astrodynamics software for flight and ground systems Develop shared tools and infrastructure that support analytics, validation, and operational workflows Contribute to or own components such as time systems, reference frames, force modeling, numerical propagation, event detection, maneuver modeling, ephemeris generation, and validation infrastructure, depending on experience Work with cross-functional teams to turn incomplete specifications into reliable software solutions Who Thrives Here Engineers comfortable with ambiguity and iterative problem-solving Collaborators who communicate well across disciplines Location This role is based in Mountain View or San Diego.

At Reliable Robotics, we are pioneering advanced safety technologies for aviation, with the mission of saving lives. Our automated aviation systems aim to revolutionize air transportation, making it safer and more accessible for the movement of goods and eventually people worldwide. Our team consists of dedicated engineers with extensive experience in aerospace, robotics, and autonomous vehicles, all working together to bring this vision to life.As a Flight Navigation Engineer, you will play a pivotal role in our Guidance, Navigation, and Control Team. Your contributions will shape the design, implementation, and testing of navigation systems, facilitating the integration of uncrewed aircraft into the National Airspace System.

Join Waymo as a Senior Software Engineer specializing in Inertial Navigation. In this role, you will play a crucial part in developing cutting-edge navigational algorithms that will enhance our autonomous vehicle systems. Your expertise will help us push the boundaries of technology and redefine transportation.

About Logos Space Logos Space is building a proliferated Low Earth Orbit (pLEO) constellation to deliver high-performance connectivity for enterprise and government clients worldwide. The Navigation team leads the development of software and infrastructure for spacecraft timing, astrodynamics, orbit determination, and other navigation workflows that support both flight and ground systems. Role Overview The Spacecraft Timing System Engineer will join the Navigation team to design, implement, and validate timing systems that enable nanosecond-class onboard accuracy. This role focuses on creating reliable onboard time, improving calibration and observability, and providing dependable timing interfaces for flight and payload systems. The work spans timing and synchronization, FPGA and embedded systems, digital hardware, calibration, and validation. Depending on experience, the engineer will contribute to or independently manage parts of the timing stack, such as timing measurement and timestamping, clock control and steering, timing distribution, monitoring and telemetry, calibration workflows, and validation automation infrastructure. Success in this position requires the ability to turn partial requirements into actionable software and to collaborate across disciplines. Key Responsibilities Develop and maintain FPGA/RTL, embedded logic, and supporting software for spacecraft timing and synchronization. Design and implement timing system features, including measurement, timestamping, clock control, timing distribution, calibration, telemetry, and monitoring. Establish and implement hardware/software interfaces: registers, configurations, telemetry, fault and status signaling, and testing hooks. Work with electrical, embedded, GNSS, signal processing, flight software, and integration engineers on timing-system architecture, requirements, partitioning, and trade studies. Build simulation, testbench, replay, lab validation, and automation infrastructure to verify correctness, stability, and timing performance. Characterize timing performance metrics such as accuracy, stability, jitter, phase alignment, latency, deterministic behavior, holdover, reacquisition, and calibration drift. Location This position is based in Mountain View or San Diego.

Reliable Robotics develops automated aviation systems to improve safety and accessibility in air transportation. The team includes engineers from aerospace, robotics, and autonomous vehicle backgrounds, all working to advance aviation technology and make air travel more dependable. Role overview The Senior Guidance, Navigation, and Control (GNC) Modeling Engineer focuses on creating and improving physics-based models that underpin both rapid design changes and certification-level validation of GNC software. This role plays a key part in ensuring the accuracy and reliability of automated flight systems. What you will do Develop and refine physics-based models to support GNC software Run simulation analyses to test and validate GNC algorithms Compare simulation outputs with real-world data to verify model accuracy Contribute to iterative design and certification processes with high-fidelity modeling Location This position is located in Mountain View, CA.

Waymo is at the forefront of autonomous driving technology, dedicated to becoming the world's most trusted driver. Originating from the Google Self-Driving Car Project in 2009, Waymo has dedicated its efforts to developing the Waymo Driver—The World's Most Experienced Driver™—aimed at enhancing mobility access and significantly reducing traffic-related fatalities. The Waymo Driver powers our fully autonomous ride-hail service and has been integrated into various vehicle platforms and use cases. With over ten million rider-only trips completed and more than 100 million miles driven autonomously on public roads, our technology has undergone extensive real-world and simulated testing across over 15 states in the U.S.Our Hardware Engineering team is a vibrant, innovative, and collaborative assembly of electrical, mechanical, reliability, software, and vehicle engineers. We design, build, and refine the products that serve as the sensory foundation of Waymo's autonomous driving technology and seamlessly integrate them into vehicle platforms. We are on the lookout for inquisitive and talented individuals to join our team and propel our mission forward.This hybrid role will report directly to a Vehicle Engineering Leader.

Join our team as a Senior Backend Engineer in Customer Engineering!At Level AI, we are reshaping customer interactions through innovative technology. Founded in 2019 and backed by Series C funding, our headquarters in Mountain View, California, is at the forefront of transforming contact centers into strategic assets through our AI-native platform. Our technology utilizes cutting-edge Large Language Models to extract invaluable insights from customer engagements, enabling businesses to enhance their customer experience and foster growth.As a Senior Backend Engineer, you will play a crucial role in empowering contact center stakeholders with real-time insights that drive data-informed decisions. You will collaborate on high-impact projects alongside experts from top tech companies such as Amazon, Facebook, and Google. Expect a rewarding journey filled with learning, growth, and the opportunity to redefine possibilities in AI-driven enterprise applications. Ready to join us?

Be Part of the Revolution in Home RoboticsAt sunday, we are pioneering the development of personal robots designed to help you reclaim valuable time lost to mundane tasks. Our ambitious mission is to make versatile robots accessible to everyone, allowing households to enjoy more quality moments together.After 18 months of assembling a skilled team, securing funding, and validating our innovative technology, we are in search of dedicated individuals to join us in this exciting phase of growth. If you're eager to leverage your skills at the cutting edge of robotics, we want to hear from you!Your RoleAs an Infrastructure & Release Engineer, you will take ownership of the

P-188 At Databricks, we are on a mission to fundamentally transform the data lifecycle, simplifying processes from data ingestion to ETL, Business Intelligence (BI), and extending to Machine Learning (ML) and Artificial Intelligence (AI) through a unified platform. We envision a future where traditional data warehouse architectures are replaced by innovative solutions like the Lakehouse architecture (CIDR 2021 paper), which integrate data warehousing and advanced analytics, effectively addressing critical challenges such as data staleness, reliability, cost of ownership, data lock-in, and limited use-case support. To turn this vision into reality, we are developing a next-generation decoupled query engine and structured storage system designed to surpass specialized data warehouses in relational query performance while maintaining the versatility of general-purpose systems like Apache Spark™. This system is intended to support a wide array of workloads, from ETL processes to data science applications. As a member of our team, you will engage in one or more of the following areas, contributing to the design and implementation of cutting-edge systems that redefine industry standards: Query compilation and optimization Distributed query execution and scheduling Vectorized execution engine Data security measures Resource management strategies Transaction coordination processes Efficient storage structures (encodings, indexes) Automatic physical data optimization techniques

At Reliable Robotics, we are pioneering innovative technology to enhance safety in aviation, fundamentally transforming air transportation and saving lives. Our automated systems will revolutionize how goods and, eventually, people traverse the globe. Join a team of passionate engineers with expertise across aerospace, robotics, and autonomous vehicles as we make this vision a reality.As a Senior Flight Guidance Engineer, you will be an integral member of our Guidance, Navigation, and Control team. Your contributions will focus on the design, implementation, and testing of our advanced guidance systems, facilitating the seamless integration of uncrewed aircraft into the National Airspace System.

Logos Space is at the forefront of satellite technology, specializing in Low Earth Orbit (LEO) satellite systems designed to meet the connectivity demands of both commercial enterprises and government entities. Our mission is to bridge critical connectivity gaps by offering robust, high-performance satellite-based services globally. We cater to business clients with contracts that stipulate performance standards for their broadband needs, embedding these capabilities from the outset. The essence of our system lies in speed and reliability, enabling seamless cloud and data center connectivity for fixed, maritime, and aerial terminals.Our team comprises seasoned engineers with a rich history of success in the networking and satellite sectors.Position Summary & ResponsibilitiesAs a member of the electrical engineering team at Logos Space, you will engage in the design, development, flight validation, assembly, integration, testing, and operational success of our spacecraft fleet. Your role will be pivotal in validating flight avionics for the Logos bus and payload, ensuring our network's reliability through rigorous analysis and testing. You will also contribute to the establishment of necessary facilities and ground support equipment. Our ideal candidate thrives in a dynamic environment and excels at transforming ambiguous design concepts into tangible hardware ready for testing and flight. We seek engineers passionate about tackling challenging problems.Key Responsibilities Include:Overseeing the complete electrical design, including component selection, magnetics design, and PCB design for flight avionics hardware.Conducting nominal and worst-case analyses throughout the hardware development phases.Managing product delivery timelines across the entire lifecycle, from design and development to prototyping, production, system integration, and on-orbit operations.Creating and issuing technical drawings, specifications, test procedures, and reports to support hardware design and validation efforts.

Join Our TeamWe are on the lookout for a skilled Production Engineer with deep system expertise, passionate about contributing to a team dedicated to designing and operating large-scale systems that ensure swift deployment, effective monitoring, and robust operations.Your ContributionsDrive automation, enhance capability, boost performance, and scale operations!Play a pivotal role in shaping our engineering best practices and deployment strategies.Facilitate automation in continuous integration and testing processes to enhance scalability.Oversee and sustain our infrastructure.Design and implement monitoring systems like Prometheus and Grafana.Optimize Linux systems for peak performance, reliability, and security.Manage configuration processes and build product features as necessary.Analyze data to identify root causes of issues and collaborate with engineers on effective solutions.Participate in an on-call rotation.Who We SeekYou possess 2+ years of experience in Site Reliability Engineering (SRE) or related fields.

Join Databricks as a Staff Backline Engineer specializing in Platform services. In this pivotal role, you will leverage your technical expertise to support our platform's operational excellence, ensuring seamless performance and reliability. You will collaborate with engineering teams to troubleshoot and resolve complex issues, enhance our platform's functionality, and drive continuous improvement initiatives.

Join poetiq as an AI Engineer, where you will play a critical role in developing a powerful and scalable platform utilizing advanced foundation models. You will be responsible for architecting a comprehensive system that integrates with large language models (LLMs), overseeing complex multi-step interactions necessary for information extraction and synthesis. You should thrive in building and operating high-performance infrastructures that enable rapid, self-improving reasoning capabilities.You are an ideal candidate if you:Have a deep passion for Python and possess expertise in constructing intricate, agentic systems or multi-step, stateful execution frameworks.Can independently transform both well-defined and abstract concepts, including your own innovative ideas, into tangible solutions.Demonstrate proficiency in designing and building dependable, high-performance infrastructures that heavily interface with external, third-party LLMs—some of which are experimental, while others are widely deployed.Are skilled at creating clean abstractions for complex workflows, particularly in synthesizing fragmented data collected through thousands of parallel, asynchronous queries.Place a high value on code quality, performance evaluation, and developing a stable, scalable platform that supports autonomous research operations.

About Nuro Nuro is a pioneering self-driving technology firm dedicated to making autonomous driving accessible to everyone. Established in 2016, we are developing the world’s most scalable driver by merging advanced AI with automotive-grade hardware. Our flagship technology, the Nuro Driver™, is licensed to facilitate a variety of applications, from robotaxis to commercial fleets and personal vehicles. With years of proven self-driving deployments, we offer automakers and mobility platforms a clear path to achieving commercial-scale autonomous vehicles, enhancing safety and connectivity for a better future. Join Our Team Our team is committed to empowering engineers to revolutionize transportation by equipping them with the tools and infrastructure necessary for productivity and success. We aim to achieve this through: Identifying and resolving engineering process challenges. Creating innovative tools and infrastructure for enhanced efficiency. Educating engineers on best practices. Utilizing cutting-edge technologies to amplify productivity. Our passionate engineers are dedicated to solving complex problems and making a positive impact on the future of transportation. Role Overview Collaborate with engineers across Nuro to pinpoint inefficiencies in the engineering workflow. Define, analyze, and monitor metrics relating to engineering velocity and system health. Innovatively address daily developer challenges by creating new tools or enhancing existing ones. Develop scalable infrastructure for continuous code integration, testing, and release, while optimizing for coverage, speed, and cost, addressing the unique complexities of Nuro’s machine learning and hardware tests. Oversee and enhance essential libraries and APIs for interaction with complex systems, managing code dependencies and the overall structure of Nuro’s codebase. Utilize Generative AI to enhance engineering productivity. Provide guidance to developers on best practices and newly implemented tools.

At Reliable Robotics, we are pioneering advanced safety technology for the aviation industry, aiming to save lives and revolutionize air transportation. Our automated aviation systems promise a future where the movement of goods and people is safer, more convenient, and fundamentally transformative. Our dedicated team comprises engineers with diverse expertise spanning aerospace, robotics, and autonomous vehicles, all working towards making this vision a reality.As a Senior Software Engineer focused on Engineering Productivity, you will play a crucial role in designing and implementing software that supports the development, analysis, and certification processes for automated aircraft systems. Collaborating closely with product owners and end users, you will craft solutions that enhance and optimize engineering workflows, with your contributions being vital in the development and certification of the first fully autonomous aircraft.