Freelance Software Developer (Rust) - Quality Assurance (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

At Cimbali Group, we support some of the world’s finest coffee equipment through expert technical training, dedicated customer service, and high-impact field support. We’re currently looking for a Technical Service Trainer to join our team. This role reports directly to the Director of Service. We support some of the world’s finest coffee equipment through expert technical training, dedicated customer service, and high-impact field support. . What We’re Looking For Solid electronic background with knowledge of espresso machines and grinders Service mindset with strong communication skills—verbal, written, and relational Ability to analyze, report, and respond to technical performance data Comfortable training others and supporting equipment in the field Microsoft Office proficiency; CRM/helpdesk experience preferred Self-driven, adaptable, and ready to contribute to a collaborative team Availability for domestic travel; valid driver’s license and passport Bonus: barista experience or coffee industry knowledge The main responsibilities will include: Delivering technical training on our full product portfolio (traditional espresso, super-automatics, grinders) Supporting sales, installations, and service escalation visits across North America Managing warranties and coordinating preventative/predictive maintenance plans Maintaining strong relationships with distributors and service partners Troubleshooting remotely via phone and support platforms Tracking activities, warranties, and performance data in our CRM/helpdesk tools Attending trade shows, conferences, and industry events as needed (30% to 50% travel monthly) Why Work With Us? Competitive salary ($65K–$75K+ depending on experience) Health benefits, 401(k), and paid vacation/holidays Opportunities to travel and train with our international HQ team Exposure to cutting-edge coffee tech—and yes, plenty of great espresso A chance to help shape the service experience in a fast-growing organization

Atto Trading, a dynamic quantitative trading firm founded in 2010 and leading in global high-frequency strategies, is looking for a Low-Latency Developer to join our team. We are expanding an international, diverse team, with experts in trading, statistics, engineering, and technology. Our disciplined approach combined with rapid market feedback allows us to quickly turn ideas into profit. Our environment of learning and collaboration allows us to solve some of the world’s hardest problems, together. As a small firm, we remain nimble and hold ourselves to the highest standards of integrity, ingenuity, and effort.  Position Highlights: We are modernizing our trading and research platform to scale our alpha trading business. This platform will enable researchers to explore, test, and deploy sophisticated signals, models, and strategies across asset classes in a robust, fully automated manner while maintaining competitive latency targets. As a Low-Latency Developer, you will be responsible for designing, optimizing, and maintaining high-performance trading systems to minimize latency. Your Mission and Goals: Analyze and optimize the performance of low-latency trading systems by identifying bottlenecks and inefficiencies in the code, and implementing effective solutions.  Develop and adapt the platform to support the demands of a fast-paced trading environment, while effectively managing technical debt. Requirements Over 5 years of experience as a low-latency developer with a focus on performance optimization in a high-frequency trading (HFT) environment. Experience with multiple components of an HFT platform or system, particularly those on the critical path. Experience working at an HFT firm during its startup phase and/or on a trading team is a significant plus. Technical Skills: Deep knowledge of HFT platforms: networking, kernel bypass, market data, order entry, threading, inter-process communication, and strategy APIs. Proven low-latency development and performance optimization in HFT. Strong proficiency in C++. Excellent understanding of CPU caches and cache efficiency. Experience with multithreaded and multi-process synchronization. Good understanding of networking protocols. Skilled in performance profiling and optimization tools. Advanced knowledge of Linux operating systems, including kernel-level device mechanisms. About You: Practical decision-making skills. Excellent communication skills. Strong analytical and problem-solving skills. Passion for trading. Ability to work independently and as part of a team. Benefits Competitive rates of pay. Paid time off (5 weeks). Coverage of health insurance costs. Office lunches. Discretionary bonus system.  Annual base salary range of $150,000 to $300,000. Pay (base and bonus) may vary depending on job-related skills and experience. Our motivation: We are a company committed to staying at the forefront of technology. Our team is passionate about continual learning and improvement. With no external investors or customers, we are the primary users of the products we create, giving you the opportunity to make a real impact on our company's growth. Ready to advance your career? Join our innovative team and help shape the future of trading on a global scale. Apply now and let's create the future together!

Pay: $62,000.00 - $104,000.00 per year Job description: We Are: A low-voltage systems integration firm in the high-end residential space for over thirty years. Many clients have felt confident referring us to family, friends and neighbors. You Are: A skilled AV Technician, playing a crucial role in the installation, maintenance, troubleshooting and programming of sophisticated AV and Low-Voltage systems in luxury residential environments. Your Schedule & Location: Monday to Friday (7:30am to 4:30pm) Our Office: 1 Hunter Ave. Armonk, NY 10504 Your Day-To-Day Role: Read Blueprints and Schematics Cabling: Pull/Terminate/Test Install/Configure/Troubleshoot: Audio, Video, Control (Savant & Control4), Lighting & Shading (Lutron), Networks, Access Control, CCTV, Security, etc. (Programming is a plus!) Interact With: Clients, Architects, Builders, Other Trades Complete Work Orders with Time & Parts Used Your Experience: 3yrs of Industry Experience (AV, Control, Lighting, Shading, etc) Experience on Construction Sites & Use of Hand Tools Valid Driver’s License (w/ Clean Record) OSHA 40 Your Compensation: Annual: $62k-$104k ($30-$50/hr) Your Benefits: Medical (United Healthcare) PTO = 2 Weeks + 6 Paid Holidays 401K Soundworks’ Mission: The end game is to makes clients happy! Attitude is everything - treating clients and teammates the way you wanted to be treated is key. Soundworks’ Core Values: Think on your own two feet Communicate Well Punctual Reliable Job Type: Full-time Benefits: 401(k) Health insurance Paid time off Work Location: In person

Eagle Seven is seeking a Senior Software Developer focused on exchange connectivity and market data.  The individual will be responsible for analyzing exchange protocols, proposing design solutions, and implementing connectivity to trading venues across the world. The role be a part of the platform development team and will provide the individual with exposure to traders and strategy developers. The successful candidate will be a self-starter, have strong sense of ownership and be driven to provide technical and intellectual solutions to business problems.    Primary Responsibilities include: Architecting and implementing low-latency market access solutions Understanding, interpreting, and interfacing with global exchanges and their protocols Designing, developing, and supporting market data feed handlers and exchange order routers Diagnosing latency issues and resolving with appropriate tuning and optimizations Working with traders to source, evaluate and facilitate access to new data sources Working with extended team to capture, house, and provide historical access to market data Liaise with vendors on data and technical issues as needed to deliver rapid solutions to the business Requirements Skills and Experience: Bachelor’s degree in Computer Science or related field Proven track record of understanding and working with global exchange protocols Experience with writing parsers for exchange protocols such as FIX and ITCH, etc. Strong background in C++ and C++ Template metaprogramming with demonstrated experience using C++14/C++20 Expertise with TCP/IP, UDP multicast, sockets, network protocols, particularly on Linux/Unix systems Experience using network tools such as Wireshark and TCPDump to monitor and debug behavior Ability to work in a collaborative environment Excellent written and verbal communication skills Benefits Eagle Seven offers a competitive and comprehensive benefits package to all full-time employees. Medical PPO and HMO coverage through BlueCross BlueShield Company Contributions to a Health Savings Account (with enrollment into a High Deductible Health Plan) Dental coverage through Principal Vision coverage through VSP 401k Retirement Savings Plan with Employer Match Company Paid Life Insurance Company Paid Disability Insurance Paid Time Off Flexible Spending Account Pre-tax Transit Benefits Complimentary Lunch and Beverages The minimum base salary for this role starts at $150,000. This role is eligible for a discretionary performance bonus as part of the total compensation package, in addition to the benefits listed above. Exact compensation offered may vary based on factors including, but not limited to, the candidate's experience, qualifications, and skill set.

We have various Entry-Level IT projects available including new desktop hardware deployments(computers, monitors) and corporate office relocation's (disconnect/reconnect of desktop hardware). Each assignment can be a single day event or multiple day projects. Technicians can participate in all available days of a project or just the days of their availability. Weekday, evening and weekend assignments are available. If you are an Entry-Level IT technician or studying to be one and have flexible schedule, please respond to this posting with your resume copied to body of email and attached as MS Word document. Requirements - Must be able to show up to projects on time. - Must be able to come prepared with basic PC technician tools when needed. - Must be able to provide documentation of your work eligibility in the U.S. - Must be able to pass a background check. - Must be a team player and be able to follow directions. If you mind getting your hands dirty, and getting on the floor to disconnect and reconnect desktops, please do not reply to this post. Otherwise we look forward to hearing from you. o Principals only. Recruiters, please don't contact this job poster. o do NOT contact us with unsolicited services or offers