Freelance Software Developer (Python-Rust) - AI Trainer

Trexquant is a growing systematic fund at the forefront of quantitative finance, with a core team of highly accomplished researchers and engineers. To keep pace with our expanding global trading operations, we are seeking a C++ Market Data Engineer to design and build ultra-low-latency feed handlers for premier vendor feeds and major exchange multicast feeds. This is a high-impact role that sits at the heart of Trexquant's trading platform; the quality, speed, and reliability of your code directly influence every strategy we run. Responsibilities Design & implement high-performance feed handlers in modern C++ for equities, futures, and options across global venues (e.g., NYSE, CME, Refinitiv RTS, Bloomberg B-PIPE). Optimize for micro- and nanosecond latency using lock-free data structures, cache-friendly memory layouts, and kernel-bypass networking where appropriate. Build reusable libraries for message decoding, normalization, and publication to internal buses shared by research, simulation, and live trading systems. Collaborate with cross-functional teams to tune TCP/UDP multicast stacks, kernel parameters, and NIC settings for deterministic performance. Provide robust failover, gap-recovery, and replay mechanisms to guarantee data integrity under packet loss or venue outages. Instrument code paths with precision timestamping and performance metrics; drive continuous latency regression testing and capacity planning. Partner closely with quantitative researchers to understand downstream data requirements and to fine-tune delivery formats for both simulation and live trading. Produce clear architecture documents, operational run-books, and post-mortems; participate in a 24×7 follow-the-sun support rotation for mission-critical market-data services. Requirements BS/MS/PhD in Computer Science, Electrical Engineering, or related field. 3+ years of professional C++ (14,17,20) development experience focused on low-latency, high-throughput systems. Proven track record building or maintaining real-time market-data feeds (e.g., Refinitiv RTS/TREP, Bloomberg B-PIPE, OPRA, CME MDP, ITCH). Strong grasp of concurrency, lock-free algorithms, memory-model semantics, and compiler optimizations. Familiarity with serialization formats (FAST, SBE, Protocol Buffers) and time-series databases or in-memory caches. Comfort with scripting in Python for prototyping, testing, and ops automation. Excellent problem-solving skills, ownership mindset, and ability to thrive in a fast-paced trading environment. Familiarity with containerization (Docker/K8s) and public-cloud networking (AWS, GCP). Benefits Competitive salary, plus bonus based on individual and company performance. Collaborative, casual, and friendly work environment while solving the hardest problems in the financial markets. PPO Health, dental and vision insurance premiums fully covered for you and your dependents. Pre-Tax Commuter Benefits  Trexquant is an Equal Opportunity Employer

About Cloud 1 Solutions, Inc. Cloud 1 Solutions is a privately owned corporation founded on 15+ years of Fortune 500 experience supporting rapid growth, emerging technologies, and secure, stable, scalable systems. Our clients range from medical to super high-tech companies with staff located throughout the US and worldwide. Why work at Cloud 1 Solutions? At Cloud 1 Solutions, you will work with some of the most exciting companies in Silicon Valley. Our customers provide services to Tesla, DOD, and DOE. In addition, we deliver critical services for cutting edge firms that range from software development to manufacturing. If you enjoy working in a very dynamic, fast paced, exciting environment, we are the right choice for you. This position is located in San Jose area. Position Description This role will be responsible for engineering and maintaining solutions for the Client Technology infrastructure, support and implementation while providing expert-level operational support. Job Description * The ability/willingness to take on new and unknown applications. * Monitoring and leading project deliverables for both local and remote site and user initiatives. * Collaborate and communicate with client and corporate team members. * Regularly attend meetings at various times to accommodate variances of team. * Ability to deliver informative, well-organized, strategic presentations, with strong interpersonal skills, to build professional relationships, creating partnerships across the organization. * Create and maintain documentation including process procedures, technical specifications, project plans, project schedules, meeting agendas and status reports as needed. * Provide timely and informative status reports to key stakeholders at all levels when appropriate * Be able to work with, and manage vendors when required. * Ability to think creatively or "out of the box" when providing solutions for end users productivity. * Be an enthusiastic advocate for team goals; provide high level support to technical teams (L2) regarding business requirements and deliverables as needed. * Communicate with management and subject matter experts across the organization to accomplish objectives. Required Skills & Requirements Environment: DELL, HP, IBM, MAC, Windows Server, Redhat 6.4 Linux, SAN, NAS, NetApp, EquaLogic Network: LAN/WAN/VLAN, T1, SIP, TCP/IP, VPN, FTP, VMAX, Clarion, EMC, CISCO, Meraki, SonicWALL, DELL, APCON, FCOE, AP, HPE Application: MS Office, SharePoint, Sage, VNC, WebEx, MS Visio, MS Project, Acronis, VMware, Virtual PC, EDR, QuickBooks, EDI, App/Web servers Cyber Security: SIEM, Vulnerability Management, Compliance, ISO, NIST, DFARS, Cyber Insurance * Past experience as a Seasoned Systems Administrator; in a large enterprise environment. * Demonstrated track record of successfully planning participating in large / complex project implementations from start to finish and complete the needed documentation for ongoing support. * Successfully led multi-vendor projects, with end to end technical leadership and management. * Extensive knowledge of Windows platform, both Windows and Server OS. * Positive personality and inclined to be successful while continually improving individual skills and those of the teams. * Self-motivational mindset, able to work with minimal supervision while delivering top-notch solutions that will continue to take the organization to the next level. * Ability to communicate to upper management effectively when needed. * Know when/how to drive change within team and larger IT teams. * Capacity to work varied hours when needed. * Demonstrated operational discipline and thoroughness in most/all aspects of work -- e.g., status reporting, documentation, following process and procedure. * Demonstrated ability to plan and work to an identified set of priorities. Education or Qualifications * Bachelor's degree, or equivalent and demonstrable training and experience. Appropriate technical certifications are a plus. * Ten (10) or more years' experience as a full-time technical professional. * Excellent oral and written communication skills. * Proven ability to direct technical projects. * Extensive experience in the analysis and design of systems, as well as in troubleshooting and providing technical support for these systems. Benefits include Medical, Dental, Vision and 401k! Principals only. Recruiters, please don't contact this job poster.

Our mission at Oura is to empower every person to own their inner potential. Our award-winning products help our global community gain a deeper knowledge of their readiness, activity, and sleep quality by using their Oura Ring and its connected app. We've helped over one million people understand and improve their health by providing daily insights and practical steps to inspire healthy lifestyles. Empowering the world starts with living our values and empowering our team. As a quickly growing company focused on helping people live healthier and happier lives, we ensure that our team members have what they need to do their best work — both in and out of the office.  Our engineering organization consists of many talented Android and iOS app developers distributed across the EU and US. All app developers collaborate closely on each platform, regardless of location or specific feature squad. For day-to-day feature work, our engineers are organized into smaller cross-functional feature squads or teams. Our squads have a great deal of autonomy and are responsible for the development and architecture of their features. Squads take full ownership of their code and handle everything from concepting, design and implementation to release, maintenance and bug fixes. This is a remote US role with a preference for candidates based in the US-Pacific timezone. We have offices in San Francisco and San Diego for those who prefer hybrid or office settings. We also have employee hubs in New York City, Boston, Los Angeles, Seattle, and more. Our teams are growing and we are searching for iOS engineers at all levels (minimum 3 years of experience) to help build and maintain key features in our iOS app. You will join a team that truly cares about Oura’s mission, product, and the quality of user experience. You and your team will work together to push the boundaries of what’s possible with wearable products. What you will do:  Work together with other engineers to improve our app experience and codebase Deliver and maintain high quality code for projects on the roadmap Push our products forward by closely aligning with PMs and Designers Collaborate with other teams such as firmware, data, backend, or science to implement new features in the Oura mobile app Requirements We would love to have you on our team if you have: Minimum 3+ years of professional development experience shipping iOS apps Strong experience with Swift, modern iOS app architectures, and common third-party libraries and frameworks Experience with collaborative development on complex shared codebases Proficiency with git, branching, and standard code review workflows Focus on quality through unit tests and manual testing Computer science fundamentals and design patterns We also appreciate if you have: 5+ years of professional development experience shipping iOS apps Any of the following: Swift structured concurrency, Combine, SQLite/GRDB, UIKit, SwiftUI, CoreAnimation, CoreGraphics, C++, PyTorch, ML algorithms, TypeScript, CI/CD, or Kotlin Multiplatform Ability to take ownership of projects and design technical solutions Experience with Agile or Scrum processes Experience with systems architecture and performance optimization Experience working asynchronously across countries and time zones Experience working with firmware teams on projects involving hardware Experience developing health, wellness, fitness, or women’s health products Experience with ML algorithms, encryption, or data privacy Experience with functional programming Benefits At Oura, we care about you and your well-being. Everyone here at Oura has a ring of their own and we are continually looking to improve employee health. What we offer: Competitive salary and equity packages Health, dental, vision insurance, and mental health resources An Oura Ring of your own plus employee discounts for friends & family 20 days of paid time off plus 13 paid holidays plus 8 days of flexible wellness time off Paid sick leave and parental leave Oura takes a market-based approach to pay, which may vary depending on your location. US locations are categorized into tiers based on a cost of labor index for that geographic area. While most offers will be closer to the starting range, successful candidates' pay will be determined based on job-related skills, experience, qualifications, work location, internal peer equity, and market conditions. These ranges may be modified in the future. Region 1 $142,000- $178,000  Region 2 $130,000- $163,000  Region 3 $120,000- $150,000 A recruiter can determine your zones/tiers based on your US location. We are not considering candidates residing in the following states: Alaska (AK), Delaware (DE), Iowa (IA), Mississippi (MS), Missouri (MO), Nebraska (NE), Oklahoma (OK), Rhode Island (RI), South Dakota (SD), Vermont (VT), West Virginia (WV), and Wisconsin (WI) Oura is proud to be an equal opportunity workplace. We celebrate diversity and are committed to creating an inclusive environment for all employees. Individuals seeking employment at Oura are considered without regard to age, ancestry, color, gender (including pregnancy, childbirth, or related medical conditions), gender identity or expression, genetic information, marital status, medical condition, mental or physical disability, national origin, protected family care or medical leave status, race, religion (including beliefs and practices or the absence thereof), sexual orientation, military or veteran status, or any other characteristic protected by federal, state, or local laws. We will not tolerate discrimination or harassment based on any of these characteristics. We will work to ensure individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Disclaimer: Beware of fake job offers! We’ve been alerted to scammers posing as ŌURA recruiters, especially for remote roles. Please note: Our jobs are listed only on the ŌURA Careers page and trusted job boards. We will never ask for personal information like ID or payment for equipment upfront. Official offers are sent through Docusign after a verbal offer, not via text or email. Stay cautious and protect your personal details. To all recruitment agencies: Oura does not accept agency resumes. Please do not forward resumes to our jobs alias, Oura employees, or any other organization's location. Oura is not responsible for any fees related to unsolicited resumes.

We are an e-waste and battery recycling company that provides sustainable waste solutions to business and government agencies in California. We are looking for one person to add to our team. Proficient in IT Technology: Hard drive Wiping Software - Research device prices Electronic Refurbishing, Reselling Knowledge with selling platforms such as: Offer-up Craigslist Facebook marketplace Highly motivated There are 4 major aspects to this position: Mechanical Disassembly, Sorting, Packing, Equipment Operation. If you have the following experience, please apply: Computer/Technical Skills, IT Support 2-3 years experience Warehouse Mechanical / Hand tools Packing, sorting, material handling Clean background Clean drug screen Applicants with exceptional organization skills & previous experience working with computers and/or electronics will be given priority. Wage Ranges From : $41,200 to $60,500 DOE : (Wages + average quarterly bonus) WE ARE COMMITTED TO PROVIDING: Challenging and fast paced work environment Full-time Employment Opportunity for Advancement Medical, Dental, Vision benefits Paid Vacation Paid Holidays Simple IRA NO PHONE CALLS - APPLY IN PERSON AND BRING YOUR RESUME Modern Waste Solutions: 3921 Pell Circle, Sacramento, CA 95838

At Avalore, we are a mission-driven, veteran-owned small business that helps government agencies harness the power of data and emerging technologies to solve complex problems. Our team combines deep technical expertise with a passion for public service, delivering innovative, responsible solutions in AI, data governance, cybersecurity, and enterprise transformation. Joining Avalore means working alongside experts who have successfully led high-impact initiatives across the DoD and Intelligence Community, and being part of a company that values integrity, agility, and purpose. Your responsibilities will include: 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.  Analyze user requirements to derive software design and performance requirements  Design and code new software or modify existing software to add new features  Debug existing software and correct defects  Integrate existing software into new or modified systems or operating environments  Develop simple to complex data queries for existing or proposed databases or data repositories  Provide recommendations for improving documentation and software development process standards  Works individually or as part of a team.  Reviews and tests software components for adherence to the design requirements and documents test results.  Utilizes software development and software design methodologies appropriate to the development environment.  Provides specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of Commercial Off-the-shelf (COTS)/Government Off-the-shelf (GOTS) in place of new development, and requirements analysis and synthesis from system level to individual software components. Requirements Bachelor’s degree in a technical discipline from an accredited college or university is required  Four (4) years of relevant SWE experience may be substituted for the degree  Ability to work independently and manage multiple priorities. TS/SCI and Special Security Accesses and Polygraph required. Applicants must be currently authorized to work in the United States on a full-time basis. Avalore will not sponsor applicants for work visas for this position. Desired: Cloud, CNO, DevOps, Data Analytics, Machine Learning & AI  Benefits Eligibility requirements apply. Health Care Plan (Medical, Dental & Vision) Retirement Plan (401k, IRA) Life Insurance (Basic, Voluntary & AD&D) Paid Time Off (Vacation, Sick & Public Holidays) Short Term & Long Term Disability Training & Development Employee Assistance Program

Data Scientist II positions offered by WarnerMedia Services, LLC (Burbank, CA). Work with managers and business stakeholders to fully understand business requirements and the desired outcomes of their science and analytics needs. Perform exploratory and predictive analysis with SQL, Python, R. Produce statistical and machine learning models that inform business initiatives. Offering salary range of $83,090 to $154,310 per year. Position reports to Burbank, CA office. Telecommuting permitted in accordance with company policy, but must live within commuting distance of stated office. Please submit resume to wbdi@wbd.com. Reference Job ID: 8387489.