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You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

Radiance technologies Salaries by Position

Radiance is seeking Research Scientist who will continue advancement of Machine Learning (ML) based Automatic Target Recognition (ATR) techniques and algorithms utilizing Synthetic Aperture Radar (SAR) data. The candidate will support RF sensor data analysis functions through the development and improvement of techniques and procedures for the ATR of targets within data collected from sensors and modeling and simulation capabilities that support physics-based signature estimation. Radiance Technologies is an employee-owned company with benefits that are unmatched by most companies in the Dayton OH area. Employee ownership, generous 401K, full health/dental/life/vision insurance benefits, interesting assignments, educational reimbursement, competitive salaries, and a pleasant work environment combine to make Radiance Technologies a great place to work and succeed. Job Duties <ul><li>Design and develop signal processing and ML techniques to solve complex SAR ATR sensing challenges.</li><li>Perform R&D on remotely sensed data to include ATR and development of Near Real Time (NRT) algorithms.</li><li>Collaborate with teams to develop and deploy capabilities to prototype NRT systems.</li><li>Provide input to analysis reports and briefings on algorithm enhancement and tool development.</li></ul> Required Skills <ul><li>Proficiency in at least one of the following programming languages Python, Matlab, C/C++.</li><li>Experience and understanding of RF signature, ATR, and ML phenomenologies specific to remote sensing applications.</li><li>Ability to work independently and in a team environment.</li><li>Strong oral and written communication skills.</li></ul> Required Qualifications <ul><li>Active Secret Clearance</li><li>BS in Physics, Applied Mathematics, Engineering, or related discipline.</li></ul> Desired Qualifications <ul><li>Active Top Secret Clearance</li><li>MS in Physics, Applied Mathematics, Engineering, or related discipline.</li><li>Thorough understanding of working in an R&D and data analysis environment.</li><li>Understanding of SAR image formation.</li><li>Working knowledge of state of the art ML techniques for performing SAR ATR.</li></ul> EOE/Minorities/Females/Vet/Disabled

Radiance Technologies is an employee-owned company with benefits that are unmatched by most companies in the Dayton OH area. Employee ownership, generous 401K, full health/dental/life/vision insurance benefits, paid time off, educational reimbursement, competitive salaries, interesting assignments and a pleasant work environment combine to make Radiance Technologies a great place to work and succeed. Job Description The Senior Software Engineer will support the National Air and Space Intelligence Center (NASIC) by performing software activities focused on assisting the Air Force move forward with digital transformation. Successful candidates will have strong problem solving and critical thinking skills. This project offers the ability to work in an office/remote hybrid format with a team of highly skilled engineers. Job Responsibilities: <ul><li>Develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems) based upon documented requirements</li></ul><ul><li>Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of COTS/GOTS in place of new development, and requirements analysis and synthesis from system level to individual software components</li></ul><ul><li>Designs, implements, and integrates software applications or performs software engineering tasks</li></ul><ul><li>Utilizes software engineering and design methodologies appropriate to the development, integration, and production environment</li></ul><ul><li>Ensures efficient delivery of software engineering capabilities using industry standards and repeatable processes</li></ul><ul><li>Mitigates risks, controls costs and schedule variance, and effectively manages large scale, integrated software projects </li></ul><ul><li>Reviews and tests software components for adherence to the design requirements and documents test results</li></ul><ul><li>Participate in DevSecOps processes and practice principles during all design phases</li></ul><ul><li>Participates in developing and delivering training as requested by the government to support applications</li></ul><ul><li>Analyze current in-use technology utilized and develop steps and processes to improve and expand upon them</li></ul> Required Skills <ul><li>Bachelor's Degree in Computer Science or relevant technical field</li><li>Active TS/SCI with CI Poly eligibility</li><li>Security + Certification</li><li>Ability to communicate technical details of work</li><li>Ability to work in a dynamic environment and take ownership for segments of a project</li><li>Strong oral and written communication and organizational skills</li><li>Open, team-oriented, with a strong desire to learn</li></ul> Required Experience <ul><li>12+ years experience writing, maintaining, debugging, and testing code</li><li>Experience with RESTful web services </li><li>Experience with server-side languages, preference toward Golang, NodeJS, and/or Python</li><li>Experience with frontend JavaScript frameworks, preference toward Angular and Vue</li><li>Experience with version control software (e.g., Git)</li><li>Experience with bug/issue tracking software such as JIRA</li></ul> Desired Experience <ul><li>Experience with containerized deployment such as Docker</li><li>Experience utilizing document store databases, such as Elasticsearch, OpenSearch and MongoDB</li><li>Experience with Kubernetes and Helm</li><li>Experience with CI/CD pipelines utilizing Argo CD and Jenkins</li></ul> EOE/Minorities/Females/Vet/Disabled

Radiance Technologies, a rapidly growing employee owned company, is searching for a talented candidate to join our Electronic Systems and Cyber Technologies Group. This person will support cyber vulnerability research to include hardware exploitation, side-channel attacks, fault-injection attacks, and reverse engineering. This person will develop and refine algorithms, tools, and techniques, which support these efforts. This person needs to be initiative, quick learning, have excellent communication skills, and adaptive thinking. They will need to have strong analytical, debugging, and troubleshooting skills. They must work well in a fast-paced mission-driven environment. This person must work well in a collaborative team environment with government and contractor personnel. There may be some travel associated with this position and onsite customer support. Desired Qualifications/Skills: <ul> <li>C/C++ </li><li>Embedded Debugging (JTAG) </li><li>Signal Processing / Data Analysis </li><li>Hardware Security experience </li><li>Cryptographic algorithms and applications </li><li>Real-time OS experience </li><li>Embedded Linux and Linux hardware driver creation </li><li>FPGA development </li><li>PERL </li><li>Tcl/TK </li><li>Python </li><li>JAVA </li><li>Verilog / VHDL </li><li>Active TS clearance </li></ul>Desired Tool Experience: <ul> <li>MS Visual Studio </li><li>Git repository creation and maintenance </li><li>Xilinx and Vivado </li><li>Linux Redhat system administration </li><li>RTL simulation: Cadence-Xcelium, Synopsys-VCS, Mentor-Questa </li><li>MS Office (Word, Visio, Excel, PowerPoint) </li></ul>Required Experience: <ul> <li>Minimum of 7 years of relevant experience. (A Master's degree in Electrical or Computer Engineering, Computer Science or relevant technical field will substitute for 2 years of experience) </li></ul>Job Requirements: <ul> <li>BS in Electrical or Computer Engineering, Computer Science or relevant technical field. </li><li>US Citizen With the ability to obtain a security clearance </li></ul>Government Clearance: <ul> <li>Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. </li></ul> EOE/Minorities/Females/Vet/Disabled

Maintain deployments of Portal for ArcGIS and ArcGIS Enterprise on Linux servers. Assist with patches and upgrades as new software is released by Esri. Investigate and document any issues or conflicts with installation on secured and hardened servers Software Engineer, Geospatial, Software, Engineer, Data Services, Technology

Radiance Technologies is an employee-owned company with benefits that are unmatched by most companies in the Dayton, OH area. Employee ownership, generous 401K, full health/dental/life/vision insurance benefits, educational reimbursement, competitive salaries, interesting assignments, and a pleasant work environment combine to make Radiance Technologies a great place to work and succeed. Radiance is seeking talented, experienced intelligence analysts to perform multi-domain intelligence analysis of areas of interest. The candidate will provide technical and analytical support by conducting multiple-discipline intelligence integration and analysis. The Analyst will work in a fast-paced, team-oriented environment, supporting and interacting with customers across the Air Force and the Intelligence Community. The position will require the analyst to work collaboratively with government military and civilians and other contractors both within NASIC and across the Intelligence Community to produce critical technical, integrated products. Knowledge of air component operations, organizations, requirements, and intelligence needs is highly desired. Job Duties <ul><li>Integrate data from various sources of imagery analysis and PIR-derived intelligence.</li><li>Analysis of radar signature data</li><li>Prepare and present intelligence briefings and report on analytical findings and other analysis topics</li><li>Participate in government required training activities</li></ul> Required Skills: <ul><li>Active Top-Secret Clearance with SCI eligibility</li><li>Ability to work both independently and in a diverse production team environment</li><li>Strong oral and written communication, technical writing, and briefing skills</li><li>Strong interpersonal communication and relationship building skills</li></ul> Desired Qualifications: <ul><li>Experience with NGA reporting and databases</li><li>Bachelor's degree in technical area such as engineering, physics, or geospatial sciences, or political science, government, history, foreign relations.</li></ul> EOE/Minorities/Females/Vet/Disabled

Radiance Technologies, a 100% employee-owned company, is seeking candidates for a Mid-Level Software Engineer to support of a U.S. Army program. This position requires a talented and experienced Software Engineer to contribute to a software engineering team within a larger, multidisciplined team to perform the System Development Life Cycle (SDLC) process, including analysis/feasibility, planning/requirements, design, system development, testing, deployment, maintenance, evaluation, and disposition/disposal. The Software Engineer will be required to assist the team with Modeling, Simulation, and Analysis (MS&A); Software-in-the-Loop (SWIL) and Hardware-in-the-Loop (HWIL) simulations; software development and integration; test and evaluation; and operations. This effort will entail regular and embedded software development using industry-leading parallel processing architectures for space payload and ground Command and Control (C2) operation. Responsibilities: <ul><li>Software development experience in a fast-paced, collaborative, and dynamic environment.</li><li>Utilize industry standard software engineering and design methodologies to design, develop, and evaluate software applications to perform the SDLC process.</li><li>Design, implement, integrate, and evaluate regular and embedded software applications for space payload and ground C2 operation.</li><li>Identify, manage, and communicate program and project risks.</li><li>Perform other duties as assigned.</li></ul> Required Skills: <ul><li>Bachelor's degree in computer science, computer engineering, or relevant technical field.</li><li>Experience with projects using Digital Engineering (DE), Model-Based Systems Engineering (MBSE) and Agile software and hardware development methodologies.</li><li>Experience using industry leading tools for Agile software development; product management; Development, Security, Operations (DevSecOps) Continuous Integration/Continuous Delivery (CI/CD); workflow management; knowledge management; collaboration; and source code repositories.</li><li>Software development experience using in C, C++, Python, or another high-level programming language for both Windows and Linux operating systems.</li><li>Strength in converting design concepts into quality software applications.</li><li>Software development experience to achieve modularity, vertical and horizontal scalability, multi-level redundancy, load balancing, software and hardware component failover, and regenerative software to enable system survivability.</li><li>Experience supporting software engineering contributions for systems engineering technical reviews to include Design Concept Review (DCR), System Functional Review (SFR), Preliminary Design Review (PDR), Critical Design Review (CDR), Final Design Review (FDR), Test Readiness Review (TRR), and Production Readiness Review (PRR).</li><li>Proven expertise in one or more of the following areas: object-oriented programming; embedded software development, Field-Programmable Gate Array (FPGA) development, Graphics Processing Unit (GPU) development; cloud architecture and application software development; MS&A; and SWIL and HWIL simulations.</li><li>Direct experience with modeling tools such as MATLAB/Simulink and STK.</li><li>Experience with Intelligence Community (IC) and Department of Defense (DoD) program and project software development.</li><li>Experience creating and managing design and development documentation.</li><li>Self-starter with excellent oral and written communication skills.</li><li>U.S. citizenship with the ability to obtain and maintain a security clearance.</li></ul> Required Experience: <ul><li>Minimum 8+ years' experience with performing software engineering activities across the SDLC process.</li><li>Experience with MS&A and MBSE integration to perform mission analysis and parametric assessments.</li><li>Experience performing detailed design activities, including iterative systems engineering; mission thread development and analysis; trade studies; hardware/software design; and prototyping, necessary for the SDLC process.</li></ul> Desired Qualifications: <ul><li>Master's degree in computer science, computer engineering, or relevant technical field.</li><li>10+ years' experience with performing software engineering activities across the SDLC process.</li><li>Experience with Government or commercial spaceflight projects.</li><li>Experience with aerospace system lifecycle design for launch, mission operations, and end-of-mission disposal.</li><li>Experience with space payload software design and development.</li><li>Experience with space systems material handling requirements.</li><li>Software development experience implementing Reliability and Maintainability (R&M) design and implementation criteria to enable space environment survivability.</li><li>Software development experience for Positioning, Navigation, and Timing (PNT) applications.</li><li>Software development experience for Artificial Intelligence/Machine Learning (AI/ML) models and applications.</li><li>Certified ScrumMaster (CSM).</li><li>Active SECRET clearance.</li></ul> EOE/Minorities/Females/Vet/Disabled

Radiance technologies Interview Questions

Radiance technologies Interview Guides

Radiance technologies Interview Questions

Radiance technologies Salaries by Position

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