Infrastructure Security Engineer

Blockchain.com is at the forefront of transforming the financial landscape. As the most reliable and rapidly expanding global cryptocurrency company, we empower millions worldwide to securely engage with digital assets. Since our inception in 2011, we have garnered the confidence of over 90 million wallet holders and more than 40 million verified users, facilitating transactions exceeding $1 trillion in cryptocurrency.Blockchain.com is the leading software platform for digital assets. We boast the largest production blockchain platform globally, driven by a shared passion for coding, innovation, and the pursuit of an inclusive and equitable financial future, one software solution at a time.We are currently in search of a skilled C++/Rust Quantitative Software Engineer/Developer. In this role, you will design, build, and optimize our electronic trading platform, collaborating closely with our traders to enhance our core trading infrastructure and high-throughput trading systems. Your expertise will be crucial in identifying and mitigating critical bottlenecks in both research and production trading.The ideal candidate will possess a robust understanding of low-level optimization, a keen interest in algorithmic trading, data analysis/design, risk management, and application development. You will gain valuable exposure to quantitative trading in our fast-paced, dynamic environment. You will have the opportunity to take full ownership of projects from inception to deployment. We expect you to be a proficient Rust/C++ engineer with hands-on experience in high-frequency trading and fast market connections.

Blockchain.com is at the forefront of revolutionizing finance, providing millions globally with secure access to cryptocurrency. Established in 2011, we have gained the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.Blockchain is the world's premier software platform for digital assets. We operate the largest production blockchain platform globally, driven by our passion for coding and building an open, accessible, and equitable financial future, one innovative software solution at a time.We are seeking a Site Reliability Engineer to join our Core team. This role involves advocating for infrastructure best practices across our organization, enabling us to securely scale a distributed financial platform that serves millions daily.Our distributed financial platform addresses some of the most fascinating challenges in the crypto space for our vast customer base and is experiencing rapid growth. The Site Reliability Engineering (SRE) team at Blockchain merges software and systems engineering to create a platform that simplifies complexity, enhancing security, reliability, and swift product delivery.The SRE organization at Blockchain is a dynamic environment focused on continual improvement. We foster a culture where team members can propose, discuss, design, and implement changes with a high degree of autonomy. We value abstract thinking to develop exceptionally effective tools and strive to eliminate toil.As a member of the Core team, you will gain a comprehensive understanding of our products' infrastructure needs. Your role will include establishing and maintaining innovative engineering solutions to enhance our customers' experience through the development of essential tools. Importantly, you will also mentor and guide developer teams to deliver new features in a rapid, secure, and scalable manner.

Blockchain.com is at the forefront of revolutionizing the financial landscape. As a leading global cryptocurrency platform, we empower millions to securely engage with digital assets. Since our launch in 2011, we have garnered the trust of over 90 million wallet holders and facilitated more than $1 trillion in crypto transactions.Blockchain.com is the premier software platform for digital assets, providing the world's most extensive production blockchain platform. Our mission is to drive innovation, foster creativity, and build a transparent and equitable financial future through cutting-edge software development.We are seeking talented software engineers from diverse technical backgrounds with a solid history of designing scalable, reliable, and high-performance systems. In this pivotal role as a Senior Back-End Engineer, you will lead technical discussions, influence strategic decisions, and contribute to the team's growth by championing exemplary engineering practices.

Role overview dvtrading is hiring a Quantitative Trader specializing in equities for its London office. This position focuses on applying quantitative techniques and data analysis to identify trading opportunities within equity markets. Both strategy development and hands-on execution play a central part in the role, directly impacting the firm's trading performance. What you will do Analyze extensive market data to find patterns and opportunities in equities trading Design, test, and implement quantitative trading strategies Collaborate with a team of experienced traders and researchers Monitor how strategies perform and adjust them to improve results Who thrives here People who enjoy solving complex problems in creative ways Those with a strong interest in financial markets Individuals comfortable in a collaborative and energetic team setting Location This role is based in London.

We are seeking a skilled and motivated Quantitative Research Engineer to enhance our data and research platforms. In this pivotal role, you will work closely with our quantitative researchers, employing your engineering and data science expertise to create innovative tools and methodologies that boost research productivity. Your contributions will help optimize the research process, refine data analysis capabilities, and drive overall efficiencies in research efforts. This position demands a robust technical foundation, exceptional problem-solving abilities, and a collaborative spirit to work effectively with cross-functional teams. Key Responsibilities:Partner with quantitative researchers to identify workflow challenges and develop technical solutions that enhance research productivity.Design, develop, and maintain software tools and frameworks that improve the efficiency of research tasks, including data collection, preprocessing, and analysis.Implement advanced data processing algorithms and statistical methods to streamline research workflows and enhance analytical capabilities.Utilize your expertise in software engineering and machine learning to construct scalable systems for large-scale data analysis and experimentation.Conduct code reviews and mentor junior research engineers, ensuring high code quality and adherence to best practices.Collaborate with diverse teams to integrate research tools into existing infrastructures.Evaluate and implement third-party tools and libraries to optimize the research process.Engage in research discussions, providing technical insights to improve methodologies and strategies.Assist in creating documentation, user guides, and training materials for research tools and processes.

Join our innovative team as a Software Engineer at Ansatz Capital, a dynamic and agile quantitative trading startup based in London. You will play a pivotal role in developing and maintaining high-performance trading applications and robust infrastructure across various financial markets. Your expertise will aid in building a comprehensive infrastructure that supports our trading operations. This position thrives in a fast-paced environment with daily release cycles, requiring keen prioritization between immediate and long-term goals.Our systems encompass a wide range of components, from hardware drivers to TCP/multicast handlers and Python interfaces, all of which necessitate custom optimizations for latency and bandwidth. A solid understanding of the trade-offs involving clock cycles and CPU cache effects is essential. You will employ multi-core and multi-threaded communications using lock-free algorithms, thereby pushing the limits of computational efficiency. A strong grasp of runtime behaviors, serialization delays, and asymptotic performance in this context is necessary. Compensation includes a competitive base salary, a discretionary performance bonus, and opportunities for participation in long-term incentive programs.

Join Ansatz Capital as a Research Engineer, where you will engage in the innovative research, testing, and deployment of cutting-edge trading strategies. You will also play a critical role in designing and constructing the research infrastructure that enables the evaluation of various trading concepts.We seek candidates who are deeply passionate about strategy development, with a strong aptitude for quantitative problem-solving and a keen interest in uncovering and capitalizing on statistical patterns within the financial markets. Proficiency in Python is essential, as you will be responsible for implementing your insights effectively.Ideal candidates will possess robust software implementation skills and have a track record of developing high-performance code alongside user-friendly tools. Your ability to deliver functional software solutions rapidly and accurately will significantly enhance our quantitative research capabilities and broaden our trading strategy coverage.Our compensation package includes a competitive base salary, a discretionary performance bonus, and opportunities for participation in long-term incentive schemes.

We are seeking a driven and innovative Quantitative Developer who is enthusiastic about leveraging financial data to create impactful products for traders and researchers. At Intropic, you'll become an integral part of a dynamic fintech startup, where engineers tackle challenging, open-ended problems spanning research, data, and product development — we pride ourselves on our proactive approach, rather than just responding to JIRA tickets.In a typical week, you will engage in a variety of tasks including Python and SQL development, implementing infrastructure changes, enhancing features of financial data products, collaborating on strategic planning with team leads, and attending client meetings to communicate your work and gather valuable feedback. We are looking for someone who enjoys delivering production-grade code, thrives in uncertain environments, works closely with analysts and product teams, and takes pride in maintaining clean, well-tested systems that support actual trading and research workflows.At Intropic, we prioritize hiring the right individual over just a polished CV. If you are passionate about taking full ownership of projects and want to influence both product and research trajectories, we invite you to apply. This is a full-time position expected to commence in the first half of 2026.

At Ripple, we’re creating a financial ecosystem where value flows as effortlessly as information does today. Our innovative cryptocurrency solutions empower financial institutions, businesses, governments, and developers to enhance the global financial landscape, promoting economic equity and opportunities worldwide. Join us to unleash your potential and contribute to meaningful change, all while collaborating with a supportive team dedicated to your growth.If you’re eager to make a significant impact and explore extraordinary career advancement opportunities, we invite you to be part of our journey in building tangible value.THE WORK:Ripple is a pioneering fintech firm transforming global finance through blockchain technology. We provide a diverse range of financial services, encompassing cross-border payments, institutional crypto liquidity, digital asset custody, and our enterprise-grade stablecoin, RLUSD. As a Software Engineer at Ripple, you will focus on payment technologies, developing scalable solutions that drive the future of finance.You will be primarily responsible for a critical component of our Payments offerings, specifically Bank Integrations. This involves serving as the central connectivity layer to our banking partners, ensuring that the data exchanged with external financial institutions is accurate, reliable, and consistently available. Your role will include facilitating the seamless distribution of this data across the organization, powering live production payment flows and reconciliation operations. Responsibilities also entail maintaining and enhancing integrations with banking partners, addressing technical debt for improved stability, and evolving the platform to satisfy emerging business and compliance demands. By enhancing our established production system, you will play a vital role in boosting scale, efficiency, and observability, ensuring Ripple’s products interact smoothly with global banks and payment providers in a dependable manner.We seek a passionate software engineer who is eager to learn and comprehend the intricacies of our complex fintech system from end to end, driving forward development initiatives. A dedication to optimizing systems and achieving the best solutions through strategic trade-offs will be key to your success in this role.

Fasanara Digital is a quantitative investment team focused on scientific and high-frequency trading in digital assets. Since 2018, the group has grown to 30 professionals and manages over $500 million USD. The portfolio relies on fully delta-neutral trading strategies and operates across more than 15 crypto liquidity venues. The team’s diverse backgrounds and commitment to continuous platform development support round-the-clock trading and help maintain a strong position in the cryptocurrency sector. Our Culture Fasanara values meritocracy, rewarding impact and performance. The environment encourages collaboration, entrepreneurship, and trust. Ambitious goals, diligent work, and a focus on teamwork define daily operations. The company is committed to attracting and developing exceptional talent, believing that team quality drives success. Role Overview The Quantitative Trader will refine and improve delta-neutral strategies on centralized crypto exchanges. This role uses quantitative skills and knowledge of exchange mechanics to expand cross-exchange arbitrage and basis trading strategies. Over time, the trader will develop deep expertise in Fasanara’s trading architecture and contribute directly to business growth. What You Will Do Enhance current trading strategies and identify new trading opportunities. Work closely with researchers and technologists to systematically improve trading profitability. Optimize trading volumes with respect to exchange fee structures. Maintain and improve codebases for production strategies and develop performance metrics. Monitor daily trading activities and troubleshoot operational issues as they arise. Requirements Full-time experience in the trading industry, with knowledge of central limit order books. Exceptional graduates with relevant internships at top firms may also be considered. Strong Python skills and familiarity with SQL. Excellent problem-solving and quantitative analysis abilities. Clear communication skills. Flexibility to take on a variety of tasks as needed. Nice to Have Background in the cryptocurrency sector (especially delta-1), ideally at a leading firm. Benefits Bupa health and dental coverage, Cycle to Work scheme, enhanced pension plan, and at least 25 days of annual leave. Enhanced parental leave, special leave options, and charitable contribution programs. Competitive bonus structure. Regular team-building events and activities.

About the RoleWe are seeking a talented Senior Full-Stack Engineer to become a vital part of our ongoing trading platform development for a major enterprise client. This system is critical to production, long-lasting, and continuously evolving, with a significant emphasis on performance, reliability, and maintainability.While Applied Blockchain is recognized for its advancements in distributed ledger technology and cryptography, this position focuses on a non-blockchain trading system utilizing cutting-edge TypeScript-based technologies.You will join a highly skilled team of senior engineers and QA developers, where autonomy, technical ownership, and thoughtful decision-making are paramount.Your Responsibilities IncludeDesigning, developing, and maintaining features across the full stack of an internal trading platform.Working primarily with:TypeScript (Node.js & React)Monorepo tooling, GitHub, GitHub ActionsJest, PlaywrightRedis, MS SQL, WebSocketsDocker, KubernetesObservability tools (Grafana, Prometheus, SonarQube)Taking complete ownership of features from conception through to production.Collaborating closely with platform/DevOps engineers on build pipelines, observability, and operational concerns.Interfacing directly with clients to clarify requirements and propose effective solutions.Contributing to and enhancing automated testing practices.Participating in peer code reviews to maintain high engineering standards within the team.Utilizing LLM/AI enabled development tools and techniques (with access to the latest OpenAI/Anthropic models) in everyday development.Qualifications8+ years of professional software development experience.3+ years of hands-on experience with TypeScript, including Node.js and React.Proven experience in building and maintaining production systems.Able to work effectively within a senior, autonomous engineering team.Excellent communication skills with fluency in English.Hybrid work arrangement (London).Preferred QualificationsFamiliarity with functional programming concepts or languages (e.g., OCaml, Haskell).Prior experience in trading, finance, or real-time systems.Strong understanding of DevOps and operational aspects (logging, metrics, automation).London-based candidates preferred.Willingness to participate in company/client events and travel as necessary.Benefits5 dedicated training days per year.£1,000 annual training allowance (up to 50% for home workstation equipment).Company-provided equipment and onboarding kit.In-person team events every quarter.Annual bonus based on company performance.

About Man Group Man Group is a global alternative investment manager with headquarters in London. The firm manages $227.6 billion* in assets and operates across several international offices. Man Group plc is listed on the London Stock Exchange (EMG.LN) and is part of the FTSE 250 Index. The company specializes in Systematic, Discretionary, and Solutions investment strategies, working with both single and multi-manager approaches. Research spans public and private markets, with a significant focus on alternative assets. The team partners closely with clients to develop tailored investment solutions. More details can be found at www.man.com. *As of 31 December 2025 Role Overview: Quantitative Engineer - AHL This Quantitative Engineer position sits within Man AHL, the systematic trading division at Man Group. The role involves close collaboration with Quantitative Researchers to develop equity market neutral models. Core responsibilities include building new alpha signals and designing trading strategies. The work is varied and research-driven. The Team Quantitative Engineers are key members of a technology group that includes over sixty professionals from eighteen nationalities. Team members bring experience from Computer Science, Mathematics, Physics, and Engineering, all sharing a strong interest in technology and coding excellence. Engineering teams are structured as small, cross-functional groups. Roles are organized as either Quant Platform Developers (Core Techs) or Quant Developers (Sector Techs), which enables alignment with specific asset classes or market sectors. Team members often rotate between groups, gaining exposure to different systems and finding the best fit for their skills and interests.

About Blockchain.com Blockchain.com connects people to the world of cryptocurrency. Since 2011, the company has supported over 90 million wallet holders and more than 40 million verified users, processing more than $1 trillion in transactions. Role Overview The Institutional team at Blockchain.com is looking for a Front-End Engineer based in London. This group focuses on building tools and experiences for institutional clients in the crypto space. What You Will Do Collaborate with colleagues to deliver front-end solutions for institutional products Contribute to a culture that values courage, productivity, and continuous improvement Work to optimize processes and deliver results that matter Grow your skills by learning from others and sharing knowledge What We Look For Strong interest in front-end engineering and digital assets Team player who values collaboration and learning Commitment to high standards and impactful work Based in London or willing to work from the London office

IMC Trading is seeking skilled quantitative researchers to craft advanced high to mid-frequency delta one trading strategies and predictive models for the Equities markets. If you are passionate about leveraging Machine Learning in trading to unlock substantial execution advantages and collaborating to elevate our firm to the forefront of the trading industry, then this opportunity is tailored for you. With a rich history of competitive advantages in market access, global presence, options expertise, and low latency, IMC has significantly benefited from the rapid advancements in Machine Learning. Our focus is on tackling some of the most compelling and transformative challenges in the trading landscape. At IMC, we believe in teamwork, open idea sharing, and collaboration across various disciplines, desks, and offices to drive success.

About the Role At Jane Street, our quantitative traders excel in identifying market signals, analyzing and executing strategies, and constructing sophisticated quantitative models. You will conduct statistical analyses, build algorithmic trading systems, manage risk, and contribute to the development of new business initiatives. Our trading desks are integral to our collaborative and cooperative office culture. You will work closely with seasoned traders committed to mentoring and supporting our new team members. Through interactive, hands-on training, you’ll take on significant trading responsibilities within weeks to months of joining our team, complemented by a comprehensive year-long educational curriculum across the firm. At Jane Street, we intentionally blur the lines between research, technology, and trading. As our strategies become increasingly sophisticated, collaboration is vital to push the boundaries of what we can achieve. We leverage petabytes of data, operate a computing cluster with hundreds of thousands of cores, and maintain a growing GPU cluster featuring thousands of high-end GPUs. We embrace a diversity of statistical and machine learning techniques, from linear models to deep learning, tailored to fit the specific challenges we face.

Join our innovative team at mustard-systems, where we develop tailored statistical models and probabilistic frameworks that accurately predict horse racing outcomes and optimize trading strategies. Your insights will directly influence our success, determining what to back, when, and how much.We are seeking a dedicated researcher to become a vital member of our quantitative team. In this role, you will enjoy significant ownership over your projects, making impactful decisions about what you build, how you approach it, and evaluating its effectiveness.If you have previously tackled challenging technical problems and are eager for more opportunities to apply your scientific problem-solving skills in a high-stakes environment, we want to hear from you.Your responsibilities will include building and refining our quantitative models. While our primary focus is on custom state space models, probabilistic frameworks, and neural architectures, we are open to exploring other methods if they yield better results. Understanding the data is just as crucial as modeling; you'll need to navigate its complexities and uncover untapped opportunities.You will be expected to articulate the rationale behind your modeling choices clearly, and we will encourage you to challenge our assumptions as well.As part of a small, ambitious team, you will grow your understanding of our product and domain, influencing research directions and the business decisions that stem from them. We are looking for someone who identifies problems, crafts solutions, and pursues tangible outcomes, rather than merely completing predefined tasks.

About the Position As a Quantitative Trader at Jane Street, you will be part of a dynamic team that leverages proprietary models to execute over a million trades on busy days. Our traders collaborate to identify and capitalize on pricing inefficiencies, develop innovative models, manage risk, explore new products, and expand into emerging business areas. Experienced traders mentor and guide their less-experienced colleagues, allowing new traders to grow into their roles with increasing responsibility. At Jane Street, technology is integral to our trading strategy. We pride ourselves on being as much a technology firm as a trading company. Our primary programming language is OCaml, a statically-typed functional programming language, and we boast the largest team of OCaml engineers in any industrial context.

Join our dynamic team at Legal & General as a Quantitative Analyst in London. In this pivotal role, you will leverage data-driven insights to enhance our investment strategies and drive informed decision-making. You will collaborate with cross-functional teams, applying your analytical skills to interpret complex financial data, optimizing our investment portfolio. If you're passionate about quantitative analysis and looking to make a significant impact, this is the opportunity for you!

About Man GroupMan Group is a premier global alternative investment management firm dedicated to delivering superior performance for discerning clients through our Systematic, Discretionary, and Solutions services. Leveraging our expertise and cutting-edge technology, our investment strategies encompass both single and multi-manager approaches, backed by rigorous research and covering public and private markets across all major asset classes, particularly in alternatives. Our partnership philosophy enables us to forge deep relationships with clients, tailoring solutions to meet their investment objectives and serve the needs of millions of retirees and savers.Headquartered in London, we manage assets worth $227.6 billion and operate from various locations worldwide. Man Group plc is publicly traded on the London Stock Exchange under the ticker EMG.LN and is part of the FTSE 250 Index. For more information, please visit www.man.com.* As of 31 December 2025The Team:The AHL Macro team specializes in Macro strategies, systematically trading liquid futures and foreign exchange with holding periods that vary from monthly to intraday.