Platform Software Engineer

About KalshiKalshi is pioneering a groundbreaking sector in finance: prediction markets. Our platform empowers individuals to trade on the outcomes of various events, transforming any future question into a financial opportunity. After years of advocacy, we successfully legalized prediction markets in the U.S., establishing ourselves as the fastest-growing financial market in the nation, with thousands of markets spanning politics, economics, finance, weather, technology, AI, culture, and beyond.We envision a world where prediction markets become the largest financial marketplace globally, enabling anyone to engage and invest in the future.Our vision: To construct the largest financial market on Earth.Our mission: To bring greater truth to the world through the power of markets.At Kalshi, our culture revolves around hiring exceptional talent, fostering hard work, and enjoying the journey together. We seek ambitious and remarkable individuals to join our compact team and help build the next generation of financial markets.Your RoleAs a vital member of Kalshi, you will be instrumental in crafting a next-generation financial ecosystem—akin to the NYSE or CME—starting from the ground up. You will engage with various platforms, including core exchange systems, clearinghouses, API infrastructure, and broker connectivity. In our agile team environment, your responsibilities will scale quickly, making your contributions significant and visible.Key ResponsibilitiesDevelop order matching and trade execution algorithms and data structures.Create high-performance data feeds and trading APIs for clients.Design robust clearing systems with high availability, including margining and collateral management.Lead integration efforts with external market makers, brokers, and hedge funds.Conduct stress tests on large-scale systems to ensure their durability and maintainability.Optimize database access patterns and service algorithms for enhanced performance.Innovate new market structures, including non-binary markets and futures.Maintain close contact with customers to define features, launch products, and iterate based on feedback.Deliver rapid and quality deployments, ensuring high standards in your work.

Join Atto Trading, a pioneering quantitative trading firm established in 2010, at the forefront of high-frequency trading strategies. We are actively seeking a C++ Software Engineer to enhance our dynamic team in New York.Our diverse and international team comprises experts in trading, statistics, engineering, and technology. Our unique blend of disciplined strategies and swift market feedback enables us to transform innovative ideas into profitable outcomes. Here at Atto, we foster an environment of continuous learning and collaboration, allowing us to tackle some of the most complex challenges in the industry together. As a small firm, we pride ourselves on our agility and commitment to integrity, creativity, and hard work.Position Highlights:As we modernize our trading and research platform to expand our alpha trading operations, you will play a pivotal role in developing a platform that empowers researchers to explore, test, and deploy complex signals, models, and strategies across various asset classes in a fully automated and robust manner, all while adhering to stringent latency targets. Your contributions will be crucial in building, maintaining, and supporting this platform.Responsibilities:Design, develop, and maintain our leading global trading platform using low-latency C/C++ systems specifically for high-frequency trading (HFT), consistently improving its performance, functionality, and stability.Conduct rigorous testing and engage in thorough code reviews to ensure high-quality standards.Integrate advanced networking hardware interfaces (FPGA, kernel-bypassing drivers).Exhibit proactive decision-making and self-direction, while knowing when to seek assistance.Investigate and propose enhancements for platform performance.Requirements:A minimum of 2 years of experience in developing high-frequency trading platforms and trading systems.Proficiency in C/C++, particularly modern C++ within a Linux environment.Expertise in profiling and optimization techniques.Strong understanding of Object-Oriented Programming (OOP), Multithreading, and Inter-Process Communication (IPC).Bachelor's degree or higher in Computer Science, Computer Engineering, or a related field.Meticulous attention to detail, a commitment to maintaining high standards, and a critical mindset.Able to juggle multiple tasks in a fast-paced environment.A proactive attitude towards building, learning, and achieving results.Desirable Qualifications:Familiarity with operating systems, including kernel-level understanding of device support in Linux.Knowledge of financial instruments such as Stocks, ETFs, Futures, and Options.Experience with various market data and order entry protocols (ITCH, OUCH, PITCH, CME MDP).A genuine interest in finance, trading, and contemporary electronic markets.Benefits:Competitive salary packagePerformance-based bonuses401(k) retirement planMental health support initiatives

About WintermuteWintermute is a leading algorithmic trading firm specializing in digital assets. We are at the forefront of providing liquidity across all major cryptocurrency exchanges and trading platforms, along with a wide range of OTC trading solutions. Our partnerships with high-profile blockchain projects and traditional financial institutions transitioning into the crypto space position us as a pivotal player in the digital asset markets. We don’t just trade; we actively contribute to the blockchain ecosystem through strategic investments, collaborations, and project incubation. For more details, please visit here.Why Join Wintermute?As a global company with offices in London and Singapore, we opened our US office in early 2025, anticipating significant growth in the coming years. This presents a unique opportunity for you to be part of the rapid expansion of Wintermute Americas. Role OverviewWe are looking for a DevOps Engineer to join our Liquidity Integration team in New York. The Liquidity team is integral to supporting Wintermute’s flagship OTC platform, which facilitates trading for thousands of counterparties via API and the Wintermute NODE platform. Your responsibilities will include designing efficient counterparty-centric integration and support processes, as well as providing operational support throughout the counterparty lifecycle.Your role will focus on global integrations and support, particularly during US business hours and for US counterparties. Collaboration with business development, product teams, traders, engineers, and our global DevOps teams in London and Singapore will be essential in ensuring counterparty technical integration, platform stability, performance, and resilience.

Atto Trading is a leading quantitative trading firm that employs a portfolio of signal-driven high-frequency trading strategies across cash equities and futures markets.We are currently seeking a dedicated Trading Operations Engineer to enhance our team. As we embark on expanding into new markets, it is an exhilarating time to join our diverse group of professionals specializing in trading, statistics, engineering, and technology. Our methodical approach, paired with rapid market feedback, enables us to transform innovative ideas into profitable outcomes swiftly. We foster a collaborative and educational environment where we tackle some of the most challenging problems in the industry together.As a compact firm, we maintain agility and uphold the highest standards of integrity, creativity, and diligence.Our Trading Activities:We execute trades on nearly all US exchanges, including NASDAQ, NYSE, ARCA, Cboe, CME, CFE, and more.Key Responsibilities:Oversee and manage Atto Trading’s automated trading systems to ensure seamless operations.Conduct proactive analyses and enhancements of trading pipelines by developing scripts to automate and optimize daily trading processes and reporting mechanisms.Collaborate with traders, engineers, brokers, and exchanges to address and resolve intraday issues in real time.Engage directly with exchanges and clearing members to investigate and resolve live trading discrepancies.Partner with software engineering teams to refine and sustain trading infrastructure and internal monitoring systems.Automate and enhance trading support workflows and pipelines utilizing Python and Bash scripting.Support daily risk operations through report generation and execution of established risk protocols.Document production incidents while maintaining thorough logs and monitoring protocols.Manage and oversee enterprise systems related to pipeline scheduling, software releases, and operational monitoring.Assist in new market deployments by working closely with internal teams on infrastructure and connectivity.

Belvedere Trading is a premier proprietary trading firm with a robust presence in Chicago, New York, Boulder, and Singapore. Our dedicated traders excel in providing market liquidity through their adept market-making activities, mastering a broad spectrum of commodities, interest rates, exchange-traded funds (ETFs), and equity index options. From our inception, we have consistently invested in cutting-edge proprietary technology, building our systems from the ground up. Our trading models and software systems undergo continuous re-engineering and optimization to maintain our competitive edge within the industry. We thrive in a collaborative team environment where we challenge each other to consistently deliver value and share in the collective success of the firm.We are seeking a Senior Trading Software Engineer to innovate and enhance our trading platform. In this role, you will collaborate closely with traders and quantitative researchers to design and evolve the infrastructure behind our automated options trading systems. Our core platform is developed in Java, with an expansion into modern C++ to propel our strategies into new markets. You will be involved in all aspects, from trading logic and system performance to FPGA integrations. Our daily operations emphasize rigorous code reviews, automated testing, and scalable best practices. If you are passionate about optimizing every microsecond, tackling real-time challenges, and building robust, scalable systems, this position will keep you engaged and motivated every day.

Join the dynamic engineering team at Versant, where we’re revolutionizing the world of news, sports, and entertainment! We are seeking a dedicated Software Engineer to help design and develop scalable, secure, and user-friendly applications that drive our next-generation video platforms. This exciting opportunity is perfect for those who thrive in a fast-paced, startup-like environment, are eager to learn new technologies, and are passionate about leveraging SaaS and low-code/no-code solutions to deliver rapid value.Key Responsibilities:Collaborate with cross-functional teams to develop comprehensive full-stack solutions that effectively address real-world business challenges.Design and implement robust, fault-tolerant microservices and sleek modern front-end applications.Utilize SaaS and low-code/no-code platforms to expedite the development process where applicable.Engage in code reviews, pair programming, and contribute to team knowledge-sharing initiatives.Produce secure, efficient, and maintainable code that adheres to best practices.Work closely with product and architecture teams to ensure synchronization of technical direction and business goals.

Join the Institutional Fabric of the Digital Asset MarketFounded in 2018, Talos Trading is at the forefront of providing institutional-grade trading technology for the global digital asset market, empowering leading entities within the crypto ecosystem. Our mission is to facilitate the widespread adoption of digital assets by effectively connecting institutions to the digital asset landscape. We are dedicated to creating the most innovative and reliable platform globally, supporting every aspect of the trading lifecycle.At Talos, we cultivate an environment that promotes kindness, respect, and inclusivity. We value diverse perspectives and believe that each team member contributes unique insights that propel Talos forward. Our culture is built on trust, integrity, collaboration, and collective growth.Our team is a close-knit, globally distributed group of seasoned engineers and business leaders, with offices in New York, London, Singapore, and Cyprus. In our hybrid-friendly setting, whether working from the office or remotely, your individual skills and insights will be essential in building something exceptional.Client Services Engineer RoleWe are seeking a seasoned client-facing engineer who will play a pivotal role in supporting our customers within a dynamic, 24/7 global digital asset trading environment. This essential position will contribute significantly to client success and the overall stability of our trading systems.

Join Our Team as a Software Engineer in Portfolio EngineeringAt Talos, we are revolutionizing the digital asset market by providing cutting-edge trading technology designed specifically for institutions. Since our inception in 2018, we have been dedicated to promoting the widespread adoption of digital assets by effectively linking institutions to the digital ecosystem.Our culture is built on kindness, respect, and the celebration of diverse perspectives, fostering an inclusive environment where every team member's contributions are valued. We believe that collaboration drives our progress, and we strive to cultivate a workplace grounded in trust, integrity, and mutual growth.As a part of our globally distributed team, you'll collaborate with highly skilled engineers and business leaders from hubs around the world, including New York, London, Singapore, and Cyprus. Whether working remotely or in-person, you will be empowered to leverage your unique skills to contribute to our mission.Your Role as a Software Engineer in Portfolio EngineeringWe are looking for a passionate Software Engineer to join our Portfolio Engineering team, responsible for developing systems that facilitate institutional portfolio construction, optimization, risk modeling, and systematic strategy deployment within digital assets.You will engage with our Portfolio Engineering platform that integrates seamlessly with Talos OEMS, allowing clients to design, validate, and implement investment strategies in a robust production environment. Your contributions will be vital in ensuring the correctness, performance, and scalability of our core systems.

Speechify aims to remove barriers to learning by transforming text into audio. Over 50 million people use Speechify’s text-to-speech products to listen to content from PDFs, books, Google Docs, and websites, helping them understand and retain information more easily. Our products span iOS, Android, Mac, a Chrome extension, and a web app. Speechify has earned recognition from Google as Chrome Extension of the Year and from Apple with a 2025 Design Award for Inclusivity. We focus on making reading accessible to all. The fully distributed team includes nearly 200 professionals from backgrounds at Amazon, Microsoft, Google, and top PhD programs. Collaboration and creativity are central to our culture; every team member’s ideas matter. Role Overview The Platform Software Engineer will build and support backend services that drive Speechify’s core operations. This includes systems for payments, analytics, subscriptions, and integrations with external APIs. The work directly supports our ability to scale and introduce new features. Who We’re Looking For Strategic thinkers who enjoy solving complex problems Comfort working in a fast-moving setting Strong interest in delivering excellent user experiences Clear communicators who value teamwork Consistent, results-driven contributors Speechify’s flat structure rewards technical leadership and solid execution. We value work ethic, open communication, and a drive to win. Interview Process Our hiring steps are straightforward. Candidates complete several technical interviews, usually within one week. Location This role is based in Rochester, NY, USA.

Join the Digital Asset Revolution as a Software EngineerFounded in 2018, Talos is at the forefront of institutional trading technology for the digital asset market, supporting the leading entities within the crypto ecosystem.Our mission at Talos is to propel the widespread adoption of digital assets by effectively bridging institutions with the digital asset landscape. We are dedicated to creating the most innovative and reliable platform globally, encompassing the full trading lifecycle.At Talos, we cultivate a workplace that prioritizes kindness and respect, values diverse perspectives, and champions inclusivity. Every team member contributes unique insights and abilities that drive our mission forward. In our quest for excellence, we maintain a culture of trust, integrity, collaboration, and shared growth. Together, we are ambitiously crafting something remarkable. Your distinct skills and insights will be integral to our collective success.We are a close-knit yet decentralized team of seasoned engineers and business professionals. Our hybrid work model offers flexibility, with physical hubs located in New York, London, Singapore, Sweden, and Cyprus.Position Overview: Software EngineerOperating at the intersection of cryptocurrency and capital markets, Talos is building high-performance systems tailored for the dynamic digital asset arena. As a Software Engineer, you will work alongside our talented team to enhance the backend platform that empowers institutional crypto trading.You will engage in critical tasks such as order routing, market data connectivity, position management, and risk systems. We seek engineers who are eager to take ownership of their projects and engage throughout the development lifecycle, from design and implementation to testing and deployment.At Talos, we value engineers who thrive on solving intricate problems, excel in fast-paced environments, and are keen to learn from experienced colleagues. While prior experience in finance or crypto is advantageous, we prioritize your coding proficiency, critical thinking, and collaborative spirit.Curious about Talos’s engineering culture? Explore Sonic, our inaugural open-source project that enables Talos to achieve microsecond network stack latency in Go: https://github.com/talostrading/sonic

About WPPWPP serves as a trusted growth partner for the world's foremost brands. Leveraging exceptional talent, reliable data, and world-class partnerships, all integrated through our innovative WPP Open marketing platform, we empower clients to navigate transformation and achieve significant growth.WPP Media, our AI-driven media division, unifies media, data, and partnerships to deliver personalized creative solutions at scale. By utilizing WPP Open, clients gain clear insights into the effectiveness of their media investments.For more information, visit wppmedia.com.Core Values at WPP MediaAt WPP Media, we are committed to our culture and our people, which drives us to provide exceptional experiences for our clients and each other. In this role, embracing WPP & WPP Media’s core values is vital:Be Extraordinary by Leading Collectively to Inspire Transformational Creativity.Create an Open Environment by Balancing People and Client Experiences through Trust.Lead Optimistically by Championing Growth and Development to Mobilize the Enterprise.

About Us:Atto Trading is a forward-thinking quantitative trading firm established in 2010, recognized as a leader in high-frequency trading strategies on a global scale. We are on a mission to expand our diverse, international team of experts in trading, statistics, engineering, and technology. Our disciplined methodology, paired with swift market feedback, empowers us to rapidly transform innovative ideas into profitable results. As a compact firm, we pride ourselves on our agility and unwavering commitment to integrity, creativity, and diligence.Role Overview:We are seeking a proactive and skilled Head of Infrastructure to lead a dynamic engineering team through a pivotal phase of business expansion. This role entails setting strategic direction and delivering critical initiatives within a hybrid environment while maintaining close collaboration with various stakeholders. The ideal candidate will exhibit a blend of technical expertise and team leadership, thriving in a fast-paced atmosphere and dedicated to developing scalable, secure, and highly automated platforms.Key Responsibilities: Lead and mentor an infrastructure team of 7 engineers during significant organizational growth. Oversee essential infrastructure areas such as CI/CD, networking, hardware performance tuning, data platforms and pipelines, scalable computing, security, and access management. Enhance engineering standards through the application of established industry best practices. Champion modernization and upgrades of key stack components with full management support. This hands-on role requires 60-80% technical involvement, reflecting our commitment to maintaining high productivity and profitability per employee.

Ramp builds intelligent infrastructure for finance teams, helping companies manage over $100 billion in annual spending. The platform automates payment authorization, risk reduction, spend categorization, and bookkeeping for more than 50,000 organizations. Ramp’s approach centers on solving complex, data-driven challenges with a focus on ownership, urgency, and measurable impact. Customers typically see a 5% reduction in costs and a 16% increase in revenue within their first year on Ramp. Every team member is empowered to make decisions that shape the company’s outcomes, with an emphasis on action over credentials. Role overview This Software Engineer position sits on the Engineering Platform team in New York, NY (HQ). Rather than building customer-facing features, this team creates and maintains the core infrastructure that supports over 300 engineers at Ramp. Work includes developing and refining CI/CD pipelines, merge queues, deployment systems, service templates, and on-call tools, as well as the AI-driven layer that connects these systems. When internal engineering processes slow down or fail, the effects are felt company-wide. This role carries responsibility for the entire incident lifecycle, from diagnosis and remediation to postmortem analysis and prevention. The work is foundational and high-impact, supporting a fast-moving engineering organization. What you will do Design and enhance systems that increase engineering productivity, such as merge queues, deployment strategies, CI/CD frameworks, Smart Reviewer, and stack tools. Respond rapidly to slowdowns or issues. Lead incident response from start to finish: identify root causes (for example, database serialization failures or Redis latency spikes), implement solutions, document postmortems, and develop strategies to prevent future incidents. Establish standardized service pathways, including API design, database migrations, Kafka, Temporal, and secret management, to help teams build infrastructure efficiently and avoid redundant work. Oversee the full suite of developer tools (including Devportal, Graphite, Buildkite, Inspect, deployment processes, LaunchDarkly, and Datadog), with a strong understanding of their interactions, especially under pressure. Treat the Software Development Life Cycle (SDLC) as an operational system: monitor metrics like pull request throughput, CI/CD cycle times, and defect rates, and proactively address bottlenecks.

Join the Foundational Team at RillaRilla is revolutionizing the way we index the offline world. We have developed the premier sales coaching software tailored for organizations that conduct sales in-person. With over 1000 clients, including industry giants such as The Home Depot, KKR, Neighborly, and PulteGroup, our platform empowers AI-driven sales coaching across their operations.Supported by leading investors including Google Ventures, Bessemer Ventures, Crew Capital, and Broom Ventures, Rilla is an in-office team based in New York City. Our dynamic team operates with the speed and adaptability of high-performance learners, driven by a deep commitment to our customers and a passion for maximizing our real-world impact.If you're eager to develop products and systems that capture and index billions of real-world conversations, Rilla is the perfect place for you.Your RoleWe are establishing a new Platform team, and we are looking for one of the inaugural hires. You will collaborate closely with the platform team lead to shape how Rilla constructs, deploys, monitors, and scales its infrastructure.Your responsibilities will span the entire platform architecture: CI/CD pipelines, Terraform modules, monitoring stacks, SSO integrations, and the API infrastructure crucial for our client operations. If it ensures our product’s functionality and allows engineers to deploy seamlessly, it falls under your purview.You will engage in coding, system design, and architectural decision-making, effectively constructing the platform relied upon by our expanding engineering team of over 25 members. You will take ownership from initial concept to delivering production systems that serve thousands of customers.We welcome engineers of all experience levels; what counts is your relentless resourcefulness, strong technical skills, and enthusiasm for building from the ground up.Do you consider yourself 'obsessive' in your craft? Do you want to define the infrastructure for one of the fastest-growing startups in history? Then Rilla is the ideal environment for you to thrive.

Belvedere Trading is a proprietary trading firm with offices in New York, Chicago, Boulder, and Singapore. The company specializes in trading commodities, interest rates, ETFs, and equity index options. Belvedere is known for its focus on technology and ongoing system improvements to stay ahead in the markets. As part of Riverside Capital Markets (RCM), Belvedere collaborates closely with founding partners to drive Market Making and Quantitative Trading efforts. Teams operate from multiple locations, including New York, and use both in-house and third-party software solutions to support trading activities. Role overview This Software Engineer position centers on designing, building, and maintaining high-performance trading systems. The role is well-suited for early-career engineers who want to take ownership of technical projects, solve challenging problems, and work directly with quantitative traders and experienced engineers. What you will do Participate in the full software development lifecycle, from design to deployment and ongoing support Develop reliable and efficient systems that align with business goals Collaborate with team members across engineering and trading functions Requirements Motivation to learn and grow as an engineer Interest in tackling complex technical challenges Intellectual curiosity and a commitment to continuous development

Role overview Speechify is hiring a Software Engineer, Platform, based in Buffalo, NY. This position focuses on developing and maintaining the software systems that form the backbone of Speechify’s text-to-speech platform. What you will do Collaborate with team members to enhance and extend platform capabilities Design, build, and maintain essential software modules Contribute to delivering a reliable and effective user experience across Speechify’s products Support ongoing improvements in text-to-speech technology Impact Work in this role will shape the future of Speechify’s platform and influence how users engage with its technology.

Dagster Labs develops tools that enable organizations to build scalable and efficient data platforms. The company’s core offerings include Dagster, an open-source project popular among developers, and Dagster+, a managed cloud solution. These products support thousands of teams, ranging from early-stage startups to established enterprises, in their analytics, machine learning, and AI initiatives. With the rapid growth of AI, the need for reliable, high-quality data has never been greater. Dagster Labs is dedicated to simplifying the testing, comprehension, and usability of data platforms. Many top AI companies have adopted Dagster as a foundational part of their technology stack. Team culture The team operates with strong funding and a collaborative spirit. High standards, open communication, and a focus on trust and curiosity shape the work environment. The company values a workplace free from egos and unnecessary drama. Locations This is a remote-first company with offices in San Francisco, New York, and Minneapolis.

At Forge, we recognize that our team is our most valuable asset. As pioneers in the private market technology sector, our mission is to create a future that offers greater opportunities for all. We embody this mission through our core values of being bold, accountable, and humble. Each day, we witness the impact of our vision as we support the teams behind the most remarkable innovations of our time, spanning from space exploration to artificial intelligence and beyond.Offering liquidity solutions, exclusive data and insights, a custody service, and a dynamic marketplace, Forge aims to establish a state-of-the-art technology infrastructure that enables a global private market that is transparent, accessible, and seamless for companies, their employees, and investors. Through our platform, employees can liquidate their private shares, companies can provide pre-IPO liquidity to their shareholders, and both individual and institutional investors can engage in the growth of private unicorns.Forge's unique global marketplace meets the increasing demand from individual and institutional investors seeking exposure to private company equities, fostering a growing network effect.Our capacity to deliver these impactful financial solutions has sparked significant interest from investors, attracted demand from clients, and created a pressing need to expand our team to serve more companies, teams, and innovators.The Role: As a Senior Software Engineer II specializing in trading engineering, you will be instrumental in delivering a high-performance trading platform that underpins the trading functionalities within the Forge Marketplace. You will identify opportunities to enhance trading products, including the integration of cutting-edge low-latency technologies, and play a key role in shaping the direction and roadmap of trading engineering initiatives.You will work closely with Product, Design, and Engineering teams to ensure smooth integration of trading technologies into products, thereby enhancing user experiences and application performance.Location: This role requires 2-3 days a week in-office in Soho, NY.

Join SeatGeek: Where Live Events Come to LifeAt SeatGeek, we believe that live events are transformative experiences that bring people together. Our mission is to revolutionize the ticketing industry through innovative technology and a customer-centric approach.The Platform team plays a crucial role in this journey by providing a robust and secure foundation for product development and deployment. By simplifying processes and offering user-friendly, self-service tools, we empower teams across SeatGeek to focus on delivering exceptional experiences without unnecessary complexities.We are seeking skilled Platform Engineers to enhance and expand our platform. In this position, you will collaborate with cross-functional teams to design and implement solutions that are user-friendly, scalable, and adaptable to diverse team requirements. Your contributions will ensure that SeatGeek teams can build and deliver products smoothly, particularly during critical operational moments.