Job Description We're looking for driven innovators and optimizers who are excited about cutting-edge technology and making a measurable impact. If you're passionate, obsessed with performance, and excited to work where nanoseconds matter, read on. What You'll Do - Solve What Matters: Break down intricate challenges and deliver clear, elegant solutions that drive real world outcomes - Build and Scale: Design, build and maintain high performance systems that are the backbone of our trading infrastructure - Optimize Everything: Continuously push the limits of latency, reliability, and throughput in a distributed environment - Partner and Deliver: Collaborate directly with traders, researchers, and fellow engineers to deliver ideas into production - Own it in production: Take pride in running your code live - Monitoring, supporting and improving it every day What we are looking for - Deep experience in C++ with a passion for clean, performant code - A strong grasp of multithreading, concurrency, and distributed systems - Curiosity to explore how things work and a drive to improve them - Clear, thoughtful communication and the ability to thrive in a high ownership environment - Bachelor's (or higher) degree in a Computer Science, Engineering or related field - Background in Trading or finance is a plus but not a requirement Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel Securities, please share your details and we will contact you if there is a vacancy available. About Citadel Securities Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market's and our clients' most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com .

About Vercel:Vercel gives developers the tools and cloud infrastructure to build, scale, and secure a faster, more personalized web. As the team behind v0, Next.js, and AI SDK, Vercel helps customers like Ramp, Supreme, PayPal, and Under Armour build for the AI-native web. Our mission is to enable the world to ship the best products. That starts with creating a place where everyone can do their best work. Whether you're building on our platform, supporting our customers, or shaping our story: You can just ship things. About the Role:We are seeking a Backend leaning Software Engineer. In this role, you will play a pivotal role in designing, building, and maintaining scalable, high-performance systems. Leveraging JavaScript/TypeScript, Node.js, SQL and NoSQL cloud-native databases, and AWS, you will develop innovative solutions for user, group, and membership management while ensuring the highest levels of security and reliability. If you’re based within a pre-determined commuting distance of one of our offices (SF, NY, London, or Berlin), the role includes in-office anchor days on Monday, Tuesday, and Friday. If you're located beyond that distance, the role is fully remote. For location-specific details, please connect with our recruiting team. What You Will Do: - Enable us to deliver secure, reliable, and scalable services that exceed industry standards and customer expectations. - Collaborate with cross-functional teams to deliver large-scale projects with cross-team dependencies. - Collaborate with peer teams to deliver solutions that meet industry standards and customer expectations. - Maintain and operate services at high scale, participating in scheduled on-call rotations to ensure reliability. - Implement identity synchronization and lifecycle management solutions using SCIM and other relevant standards. - Work with Infrastructure as Code (Terraform, AWS CloudFormation, Kubernetes, etc.) to deliver scalable, high-availability applications. - Build and maintain high-quality enterprise software using TypeScript, REST APIs, and JSON. About You: - Proficiency in TypeScript/JavaScript, React, and Node.js. - Strong knowledge of security architecture, LDAP, Active Directory, SAML, SSO,, OAuth2, OpenID Connect and web protocols like XML, SOAP, JSON, and REST. - Familiarity with access control models such as RBAC, ABAC and ReBAC. - Experience with SQL. - Hands-on experience implementing identity lifecycle management solutions using SCIM. - Practical experience developing and improving applications written in Node.js. - Exhibit excellent problem-solving abilities and effective communication skills, especially when collaborating with diverse teams. Benefits: - Competitive compensation package, including equity. - Inclusive Healthcare Package. - Learn and Grow - we provide mentorship and send you to events that help you build your network and skills. - Flexible Time Off. - We will provide you the gear you need to do your role, and a WFH budget for you to outfit your space as needed. The San Francisco, CA base pay range for this role is $196,000-$294,000. Actual salary will be based on job-related skills, experience, and location. Compensation outside of San Francisco may be adjusted based on employee location. The total compensation package may include benefits, equity-based compensation, and eligibility for a company bonus or variable pay program depending on the role. Your recruiter can share more details during the hiring process. Vercel is committed to fostering and empowering an inclusive community within our organization. We do not discriminate on the basis of race, religion, color, gender expression or identity, sexual orientation, national origin, citizenship, age, marital status, veteran status, disability status, or any other characteristic protected by law. Vercel encourages everyone to apply for our available positions, even if they don't necessarily check every box on the job description. #LI-CL1

• Own end-to-end delivery of features—from design and implementation to deployment and monitoring • Design and develop scalable backend services using .NET (C#, ASP.NET Core) • Build and maintain modern, performant frontends using React, TypeScript, and related tooling • Collaborate with product and design to translate requirements into clean, maintainable solutions • Drive architecture decisions, including API design, data modeling, and system integration • Ensure code quality and maintainability through testing, code reviews, and best practices • Troubleshoot and resolve production issues, ensuring high system reliability • Mentor junior engineers and contribute to a high-performing engineering culture • Continuously improve development processes, tooling, and team velocity

Role Description As a Senior Software Engineer, you will be a key contributor to our innovative and dynamic engineering team based in Indonesia. This role offers an exciting opportunity to work on cutting-edge projects, collaborate with cross-functional teams, and contribute to the continuous growth and success of our organization. - Develop high-quality back-end in Node.js for web application. - Familiar with front end JavaScript web technologies such as ReactJS, NextJS or AngularJS. - Maintain and bug fixing for existing backend and web system. - Support internal and external users. - Implement features based on requirements from product owners. - Analyze, fix issues and improve software quality. - Mentor, provide guidance and best practice advice to the team. Qualifications - Bachelor’s Degree in Computer Science or equivalent. - Experience in Node.js. - Experience with MongoDB, RestAPI, JavaScript/Typescript, CSS and HTML5. - Passionate about programming and solving problems. - Portfolio of showing a diverse range of web development will be a plus. - Experience in UI/UX and graphic design will be an added advantage. Requirements - Familiarity with TDD / BDD. - Familiarity with Postman. - Familiarity with NodeJS test automation framework, e.g. mocha / chai / selenium / etc. - Web templating language such as Pug or Slim. Benefits - Fast moving, challenging and unique business problems. - Strong learning and development plans for your career growth. - International work environment and flat organization. - Competitive salary. - Remote role with flexible working hours & arrangement.