Senior Full Stack Engineer (Platform)

Senior Full Stack Engineer - (Platform) Location :Remote - Preference for NYC - Or Remote USA OR EUROPE to work a 5 hour overlap with EST hours Remote | Full-time Compensation: $144K - $164K Our client is a pioneer in automated, on-chain economic security, providing a sophisticated system that enables crypto protocols to optimize risk management and capital efficiency. By analyzing protocol mechanics and scenario implications through world-class custom EVM simulations, the platform provides actionable insights trusted by leading decentralized finance (DeFi) protocols to manage and secure billions of dollars in assets. The organization is seeking a proactive and results-driven Senior Full Stack Engineer to join the team. Reporting directly to the Platform Team Lead, the successful candidate will play a critical role in building data-driven dashboards and tools to support complex risk analysis. This role involves close collaboration with research and protocol teams to deliver high-quality frontend and backend components that power essential security insights. Key Responsibilities Project Ownership: Take full accountability for projects by breaking down high-level goals into actionable tasks, proposing technical approaches, and driving execution from end-to-end. Frontend Development: Design and implement scalable dashboards and tools that visualize protocol risk, ensuring tight integration with backend data sources. API Management: Build and maintain robust GraphQL APIs and data services to power the user interface and internal tooling. Platform Evolution: Own the development, architectural improvements, and performance optimization of the Alert Portal. Insight Presentation: Partner with research and protocol teams to understand DeFi protocols deeply and present findings through intuitive, data-rich interfaces. Mentorship: Support junior engineers by sharing best practices in full-stack development and high-quality engineering standards. Technical Excellence: Ensure code quality and maintainability through rigorous testing, documentation, and comprehensive code reviews. Innovation: Identify product opportunities and technical improvements across the platform while collaborating with cross-functional teams to ensure high-quality outputs. Interview Process Initial Screening: 30-minute Recruiter / HR Call. Hiring Manager Interview: 1 hour and 30 minutes. Technical Evaluation: 45-minute whiteboard exercise. Executive Interview: 30-minute discussion with the Founder / CEO. Requirements Professional Experience: 5+ years of experience in full-stack development with modern technologies (Node.js, Python, etc.). Data Expertise: Strong experience with data warehousing, pipelining, and infrastructure. Frontend Proficiency: Proven track record of building React-based web applications and data-intensive analytics dashboards. API Design: Solid understanding of API design, specifically using GraphQL. Independent Execution: Proven ability to independently manage projects and deliver production-grade features with minimal supervision. Adaptability: Comfort working in dynamic, high-ownership environments with shifting priorities. Domain Passion: Strong problem-solving abilities and a genuine passion for DeFi and blockchain technology. Preferred Qualifications Based in USA remote or NYC to work in the Brooklyn office or Europe Experience designing, developing, and operating cloud-native services (AWS/GCP). Strong foundation in frontend best practices, including accessibility, performance, and testing. Familiarity with CI/CD pipelines and modern DevOps workflows. Interest in or curiosity about DeFi and blockchain technologies. Excellent communication skills and the ability to work cross-functionally in a fast-paced environment. Benefits Our client offers a comprehensive compensation and perks package: Salary: $144,000 - $164,000 USD (commensurate with experience and seniority). Health & Wellness: 100% employer-paid health benefit options (Medical, Dental, and Vision) for employees and their dependents. Financial Security: FSA or HSA options (depending on selected health insurance) and pre-tax commuter benefits. Time Off: Competitive PTO (21 days) plus 7 sick days and 8 observed US company holidays. Family Support: A thoughtful and inclusive Parental Leave Policy. Wellness Programs: Access to corporate wellness initiatives including OneMedical, Teladoc, Talkspace, and EAP. Growth: Career advancement opportunities at a rapidly expanding, global technology company. Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search. Commitment to Equality and Accessibility: At Cobalt Streamworks , we are committed to offer equal opportunities to all candidates. We ensure no