Job Description At Citadel Securities, a leading global market maker, our team of FPGA Engineers work in small teams to create the next generation FPGA solutions to support ultra-low latency trading systems across the firm. FPGA Engineers work closely with business leaders to design and deploy FPGA solutions that help optimize trading system performance. As an intern, you'll get to challenge the impossible in technology through an 12-week program that will allow you to collaborate and connect with senior team members. In addition, you'll get the opportunity to network and socialize with peers throughout the internship. Your Objectives: - Design, implement and test FPGA solutions across Citadel Securities' trading businesses - Improve trading system efficiency and performance to accelerate algorithmic trade signal generation and order execution - Work in small teams to build the future of finance Your Skills & Talents: - A deep passion for technology and hardware development - Pursuing a Bachelor's, Master's or PhD in Electrical Engineering, Computer Engineering or related fields - Experienced in SystemVerilog or VHDL (Python, C, Tcl, and Bash a plus) - Experience in one or more of the following areas: Hardware Architecture, RTL Coding, Simulation, Systems Integration, Hardware Validation and Testing, FPGA Synthesis, and Static Analysis - Strong written and verbal communication skills - Intellectual curiosity and passion for solving challenging problems using technology Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel Securities, please share your details and we will contact you if there is a vacancy available. We collect and use personal data in accordance with our Privacy Policy. We retain data on prospective candidates and may consider suitability for alternative opportunities at Citadel Securities. For more information, see our Privacy Policy. About Citadel Securities Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market's and our clients' most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com .

• Lead and execute joint development projects with imec and external partners focused on advanced filtration technologies and microenvironment contamination control solutions • Design, plan, and conduct experiments that support new product development and generate meaningful performance data • Utilize imec’s world-class infrastructure and technical capabilities to evaluate and validate emerging solutions for the semiconductor market • Partner closely with the CTO organization, Business Units, Product Management, and global R&D teams to ensure successful project execution and alignment • Communicate technical findings through internal reviews, customer and partner engagements, and scientific publications • Build and strengthen strategic relationships with research institutions and industry collaborators • Monitor semiconductor technology trends and translate insights into opportunities that support innovation, business growth, and market leadership

Role Description We are seeking a Sr Staff Software Engineer for the ongoing development of a S3 compliant high performance file system. The candidate must have proven development experience with technical leadership qualities, effective communication skills and is a self-starter. In addition, the candidate must collaborate with other teams and individuals worldwide to quickly learn DDN products/technology/setup & configuration. The candidate must be able to leverage and integrate the monitoring, health-check and alerting aspects around the product. - Maintain, extend, and improve our S3 implementation. - Design and develop in C/C++ under tight deadlines with minimal supervision. - Define and articulate technical designs with the appropriate details. - Full application development from design to development to testing to deployment. - Participate in technical reviews throughout the course of development. - Architecture and troubleshooting of system level components, especially the file system and related storage system components. - Undertake research based technical tasks: Define research approach, document results and derive conclusions. Should be able to design a solution based on the research conducted. - Mentor junior developers. - Support product deployment and production defect resolution in a timely manner. Qualifications - Accountable and highly motivated with solid people skills. - 12+ years' experience in system software development and complex problem resolution. - Expert knowledge of the following programming languages: C/C++. - Excellent Linux development and deployment skills including but not limited to file system development. - Full understanding of OS principles and architecture of Kernel procedures. - Broad range of experience with open-source development toolchain like gcc, gdb, g++, git. - Experience designing and developing parallel programs. - Good communication skills (verbal and written English). - Understanding of Linux File Systems. - Knowledge of user space IO frameworks such as Fuse, SPDK. Requirements - Strong understanding of RDMA network principles, libfabric, zero-copy, verbs, etc. (Nice to have). - Knowledge of performance engineering (Nice to have). - Experience working with Scrum Agile (Nice to have). - Experience of complex network programming, TCP/IP or RDMA (Nice to have).

Role Description We are seeking a Senior Staff Quality Engineer to drive embedded quality engineering for our S3-compliant high-performance file system. The candidate must have proven experience in systems-level quality engineering with technical leadership qualities, effective communication skills, and a self-starter mindset. The candidate must collaborate with development teams and individuals worldwide to deeply understand DDN products, technology, setup, and configuration, and must be able to design and own the quality strategy covering correctness, performance, and reliability across the S3 stack. Key Responsibilities - Own, extend, and improve the test strategy and automation framework for our S3 implementation. - Define and articulate quality designs and test plans with appropriate technical depth, focusing on a shift-left approach. - Drive quality across the full development lifecycle — from design review participation through release validation. - Participate in technical and design reviews to identify testability gaps and quality risks early. - Architect and troubleshoot test coverage for system-level components, with emphasis on file system behavior, storage system correctness, and S3 protocol compliance. - Undertake research-based quality tasks: define a test approach for novel features, document findings, and derive coverage conclusions. Design validation strategies based on the research conducted. - Mentor junior QE engineers and embed quality practices within development teams. Lead by example across the QE spectrum. - Support product deployment validation and drive production defect triage and reproduction in a timely manner. Qualifications - Accountable and highly motivated with solid people skills. - 12+ years of experience in systems software quality engineering and complex problem investigation. - Demonstrated ability to develop not just happy path testing, but testing designed to exclude possibility of customer-visible failures. - Expert knowledge of C/C++; strong scripting ability in Python and shell for test automation. - Excellent Linux development and test environment skills, including file system-level testing. - Full understanding of OS principles and kernel architecture as they relate to test design and defect analysis. - Broad experience with open-source development toolchains including gcc, gdb, g++, and git. - Experience designing and validating parallel and concurrent programs. - Good communication skills (verbal and written English). - Deep understanding of Linux file systems and the ability to reason about correctness at the syscall and VFS layers. - Knowledge of user-space IO frameworks such as FUSE and SPDK, with ability to design tests that exercise them end-to-end. Nice to Have - Strong understanding of RDMA network principles, libfabric, zero-copy, and verbs — with ability to validate behavior in these environments. - Experience with performance engineering and the design of performance regression test suites. - Experience working with Scrum/Agile development processes. - Experience testing complex network protocol implementations including TCP/IP or RDMA. - Familiarity with S3 protocol conformance testing and object storage semantics.