Quality Assurance Engineer

IT - Senior Quality Assurance Engineer (Funding & Exchange)

B2C2

About us: Founded in 2015, B2C2 is a global leader for institutional liquidity within digital assets. We bring 24/7 365 days a year deep, reliable pricing for spot, futures, options, CFDs, and NDFs across all market conditions. Our growing team has deep expertise across pricing, structuring, risk, systems, and regulation. B2C2 bridges the gap between traditional financial and digital assets, and is relied upon by brokerages, exchanges, banks, fund managers, and other institutions to provide 24/7 liquidity. Headquartered in London, with global offices in Paris, Jersey City, Tokyo, Singapore, and Luxembourg, our fast-growing team has expertise in traditional financial and crypto markets. We pride ourselves on our company culture and ability to attract not only the top talent but the right people. If you are looking for a role in an exciting new industry, at a dynamic company please keep reading.     This role sits within the Funding and Exchange Squad. The primary mission is to reduce operational incidents by implementing robust end-to-end integration tests that bring stability to our trading and risk components. As a Senior QA Engineer, you will transition beyond generic testing to build a scalable automated testing framework specifically for our exchange trading stack.  KEY RESPONSIBILITIES * Stability Engineering: Implement end-to-end integration tests specifically designed to stabilize trading and risk components * Framework Scaling: Assess and improve the existing automated testing framework to ensure it is user-friendly and scalable for the exchange trading stack * Integration Testing: Take ownership of testing integrations with external sources and specific exchange integrations * Issue Investigation: Assist support and development teams in reproducing and investigating complex production issues across the system stack * Stakeholder Collaboration: Work as a key member of the agile Funding and Exchange team, satisfying internal quality goals and visibility requirements for risk teams and regulators REQUIRED SKILLS & EXPERIENCE * Finance Background: Extensive experience in technical testing within a financial services or high-frequency trading environment * Exchange Integration: Proven track record of testing integrations with external sources, specifically Exchange integrations * Technical Proficiency: Ability to code in Java and develop Java-based test automation frameworks for complex systems * Risk-Based Analysis: Expert test analysis and test case creation with a strict focus on risk-based outcomes * System Stack Knowledge: Experience investigating complex issues across a full system stack PREFERRED SKILLS * Language Versatility: Knowledge of Python, Rust, or KDB/Q * Infrastructure: Experience with AWS, Kubernetes, and middleware like Redis * Protocols: Deep understanding of trading protocols including FIX, REST APIs, and Websockets * Domain Interest: A keen interest in the evolution of trading systems and the crypto industry A strong culture is a common denominator among the most successful companies and B2C2 is proud to be a values-based company.   * Ambitious - Striving to make history through world class achievements * Innovative - Forward looking in our solutions for clients and employees * Meritocratic - Rewarding positive contribution across the organisation * Collegiate - Achieving through teamwork through a healthy environment * Risk Aware – Informed decision making and considered in our practices   Equal Employment Opportunities Policy:   B2C2 is committed to a policy of equal employment opportunity for applicants and employees and we welcome applicants from all backgrounds. It is the policy of B2C2 to apply recruiting, hiring, training, promotion, compensation and professional development practices without regard to actual or perceived race, colour, religion, sex (including pregnancy, sexual orientation and gender identity), national origin, age, disability or certain classifications based on genetic information, or because someone is married or in a civil partnership or any other characteristic protected by federal, state or local laws, regulations or ordinances. As such, B2C2 will not tolerate discrimination against any of our employees on the basis of membership in a protected category. We are also committed to creating an inclusive environment to ensure we attract, engage, promote and retain the best talent. We will consider flexible working arrangements for any of our roles.

Quality Assurance & Release Engineer, Retail

On

IN SHORT: The QA, Release & Service Desk Analyst is responsible for ensuring the quality, stability, and compliance of retail technology systems across store operations. The role covers testing and release management for POS and store systems, fiscalisation compliance, integration of pricing/products/core applications, and operational oversight of the Retail Service Desk. Acting as a bridge between Technology, D365, Operations, and the Service Desk, this position ensures seamless delivery of technology solutions and ongoing store support.   YOUR MISSION: Release & System Testing * Plan, execute, and document system & release testing for iOS updates, Adyen firmware versions, Store Commerce app releases, and other core retail applications. * Validate system setup for NSO (New Store Openings) by completing end-to-end testing in a LIVE environment * Monitor and validate post-release performance to ensure system stability Fiscalisation, Pricing & Product Management * Support fiscalisation solution testing to ensure compliance with legal and tax regulations across markets. * Support pricing and product setup within POS, ensuring accurate integration with D365 and other core systems. * Validate POS-to-core system integration for product data, transactions, and reporting accuracy. Cross-Team Coordination & Support * Act as a liaison between Technology, D365, and Operations teams, ensuring clear communication and alignment. * Coordinate user acceptance testing (UAT) with Operations and business teams. * Provide training, documentation, and knowledge transfer to support teams and end users. Service Desk Oversight * manage the 24/7 service desk and act as third line support for escalations * Monitor and report on Service Level Agreements (SLAs), ensuring timely resolution of incidents and requests. * Drive continuous improvement in service quality, escalation handling, and knowledge base documentation. * Act as an escalation point for critical incidents impacting retail operations. Quality Assurance & Process Improvement * Manage issue tracking, prioritisation, and resolution of defects identified during testing or post-release. * Contribute to continuous improvement of release, testing, and support processes to enhance efficiency and reduce risks. * Maintain up-to-date documentation of testing, release notes, and support workflows for cross-team use. YOUR STORY: * Experience with POS systems, integrations, and retail IT environments. * Strong background in testing, QA, release management, or service delivery. * Knowledge of fiscalisation requirements in retail. * Proven experience in service desk operations, SLA monitoring, or incident management. * Excellent cross-functional communication skills, able to work with technical and non-technical teams. * Detail-oriented with strong documentation and process management skills.   YOUR TEAM: At On, we don’t just create tools—we craft experiences that move the world. As part of our Retail Experience team, you’ll help build the future of in-store technology. You will power a seamless omni-channel journey, and support a mission that’s bigger than any one screen: to ignite the human spirit through movement. Ready to help us redefine retail? Lace up. Let’s go.   On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.

Senior Security Assurance Engineer (Internal Penetration Testing)

Qube Research & Technologies

Qube Research & Technologies (QRT) is a global quantitative and systematic investment manager, operating in all liquid asset classes across the world. We are a technology and data driven group implementing a scientific approach to investing. Combining data, research, technology, and trading expertise has shaped our collaborative mindset, which enables us to solve the most complex challenges. QRT’s culture of innovation continuously drives our ambition to deliver high quality returns for our investors. The Security Assurance team is responsible for identifying, assessing, and validating security risks across QRT’s technology environment. The team works closely with Security Engineers, Software Engineers, Infrastructure Engineers, Cloud Engineers, and Technology stakeholders to evaluate the effectiveness of security controls and strengthen the firm's overall security posture through adversarial testing and assurance activities. Your Future Role within QRT You will: * Conduct internal penetration testing across a wide range of systems, including trading infrastructure, cloud platforms, APIs, and business applications in both Windows and Linux environments. * Perform red team-style assessments and adversarial simulations to identify weaknesses in detection, response, and resilience capabilities. * Design and execute security assurance strategies to validate the effectiveness of security controls across applications, infrastructure, and cloud environments. * Coordinate external penetration testing engagements with third-party security vendors, including scoping, execution oversight, validation of findings, and remediation tracking across cloud, infrastructure, and application environments. * Identify, exploit, and clearly document vulnerabilities, providing actionable remediation guidance tailored to engineering teams. * Collaborate with product security and development teams to ensure vulnerabilities are properly remediated. * Support threat modelling exercises by providing an attacker’s perspective on system design and architecture. * Develop and maintain tooling, scripts, and frameworks to automate testing and improve coverage of security assessments. * Contribute to continuous security testing within CI/CD pipelines, including validation of SAST/DAST findings and runtime security controls. * Conduct security reviews of internal and third-party systems, validating real-world exploitability of identified risks. * Provide mentorship and training to engineers on common attack vectors, exploitation techniques, and secure design principles. * Stay current with emerging threats, vulnerabilities, and offensive security techniques relevant to financial systems and low-latency environments. Your present skillset: * 5+ years of experience in penetration testing, red teaming, or security assurance roles, with hands-on experience testing complex, large-scale systems. * Strong practical knowledge of offensive security techniques, including web application, API, network, and cloud exploitation. * Solid understanding of system internals, networking, and common vulnerability classes, including OWASP Top 10, logic flaws, authentication and authorisation issues, and race conditions. * Familiarity with both Windows and Linux environments from an attacker’s perspective. * Experience using standard penetration testing tools such as Burp Suite, Metasploit, Nmap, BloodHound, and similar offensive security tooling. * Ability to assess the real-world impact of vulnerabilities and prioritise risks in a high-stakes environment. * Ability to clearly document findings, explain exploitability, and provide practical remediation guidance to engineering and infrastructure teams. * Strong communication skills, with the ability to clearly articulate technical risks and remediation strategies to engineering stakeholders. * Ability to operate independently, manage multiple assessments, and provide senior-level technical judgement during security assurance activities. * Preferred: * Experience testing applications and services developed in languages such as Python, C++, Rust, Go, and Kotlin/Java. * Experience with cloud security testing across AWS or Azure, including IAM, network configuration, storage, managed services, and common cloud misconfigurations. * Experience developing custom penetration testing tools, automation, scripts, exploits, or fuzzers. * Experience integrating security testing into CI/CD pipelines or supporting continuous assurance practices. * Understanding of detection and response mechanisms, with the ability to evaluate or bypass them during controlled testing. * Experience conducting red team exercises, adversary simulations, or purple team engagements. * Experience with containerised environments, Kubernetes, infrastructure-as-code, or hybrid cloud infrastructure. * Knowledge of low-latency systems, financial trading environments, or high-performance distributed systems. * Relevant certifications such as OSCP, OSEP, OSCE, CRTO, CCT APP, CCT INF, or equivalent practical experience. QRT is an equal opportunity employer. We value diversity as essential to our success and are committed to creating an environment where employees can work openly, respectfully, and collaboratively. In addition to supporting professional achievement, QRT offers initiatives and programmes designed to help employees maintain a healthy work-life balance.