• Be part of a 24x7 on-call rotation supporting all services the Database Engineering teams owns. • Contribute to the technical vision for database engineering in maintenance and Cloud migration of the relational and non-relational databases used at Marqeta. • Contribute to the design of high availability and disaster recovery solutions for database architecture. • Work on initiatives including but not limited to platform architecture, database partitioning, sharding, and the continuous evolution of the database footprint to support business growth. • Keep automation as the primary focus and ensure the design is tightly coupled with various automation to reduce manual work. • Work with the engineers from various teams to execute on short- and long-term technical vision. • Work on the root cause analysis, remediation and document efforts to effectively minimize incidents. • Write clear design documents and articulate technical decisions and trade-offs to peers and stakeholders. • Contribute to monitoring and alerting practices using tools like Datadog. • Mentoring junior engineers and contributing to team standards.

Role Description We are seeking a versatile Ruby on Rails Engineer to join our Asset Management Engineering department. In this role, you will be responsible for building and scaling production applications across the entire stack, ensuring our platform remains robust, performant, and user-centric. The ideal candidate is a seasoned Rails developer who isn't afraid to dive into Go for performance-critical tasks or craft sleek front-end experiences with React. Core Responsibilities - Full-Stack Development: Build and maintain production-grade features using Ruby on Rails across all layers of the stack. - Systems Integration: Design and implement seamless integrations with various third-party APIs. - Database Optimization: Manage relational databases (PostgreSQL), focusing on schema design, indexing, and performance tuning. - Quality Assurance: Write comprehensive automated tests using Capybara and Playwright to ensure high-quality deployments. - Collaborative Design: Participate in domain modeling, application architecture discussions, and the refinement of team development practices. Qualifications - Ruby on Rails: 3+ years of experience in production environments. - Go: 1+ year of professional experience. - Frontend: 1+ year of experience with React and either JavaScript or TypeScript. - Databases: Strong proficiency in relational databases (PostgreSQL preferred), including a solid understanding of indices and query optimization. - Testing: Demonstrated experience with automated testing frameworks. - API Integration: Proven track record of integrating with external web APIs. Requirements - Asynchronous Processing: Experience with Sidekiq or Google Cloud Pub/Sub. - API Design: Familiarity with GraphQL. - UI Frameworks: Experience with Mantine. - Architectural Patterns: Knowledge of Clean Architecture. Who You Are - Architecturally Minded: You have a deep understanding of Domain-Driven Design (DDD), Test-Driven Development (TDD), and general design patterns. - Problem Solver: You excel at debugging complex issues across both Ruby and JavaScript environments. - Product Partner: You have an interest in participating in customer interviews and helping scope and prioritize work based on user needs. - Continuous Improver: You are passionate about improving team workflows and development standards. Benefits - Work remotely Monday - Friday, 40 hours a week (no weekends). - Vacation: 10 business days a year. - Holidays: 5 National Holidays a year. - Company Holidays: 5 Company Holidays a year (Christmas Eve, Christmas Day, New Year's Eve, New Year's Day, Zipdev Day). - Parental Leave. - Health Care Reimbursement. - Active Lifestyle Reimbursement. - Quarterly Home Office Reimbursement. - Payroll Deduction Purchase Plans. - Longevity Bonus. - Continuous Learning Bonus. - Access to Training and Professional Development Platforms.

Role Description Design and build backend services, APIs, and orchestration layers powering agentic AI features in Python. - Develop, integrate, and harden LLM-based agents, tools, and multi-step workflows. - Own a scoped, business-critical project from design through delivery, with weekly mentor and program-lead check-ins. - Participate actively in code reviews, design discussions, and sprint cycles alongside the engineering team. - Write tests and contribute to documentation for the services and components they own. - Collaborate with frontend, data, and product partners to ship work end-to-end. Qualifications - Currently enrolled in an accredited college or university in Computer Science, Software Engineering, or a closely related technical field at the rising-senior through in-progress master's level. Recent graduates within the last 6–12 months may also qualify. - Demonstrated proficiency in Python with the ability to write, debug, and reason about non-trivial code independently required. - Solid grounding in API design, data structures, and core backend architecture concepts required. - Working familiarity with Git and command-line development environments required. - Working knowledge of, or hands-on exposure to, LLM-based agents, tools, or AI-driven application workflows required. - Experience with Rust through coursework, production work, or substantive personal projects preferred. - A public portfolio (GitHub, personal site, or deployed projects) demonstrating backend or AI-related work preferred. - Prior internship, open-source contribution, or substantive personal project work in backend engineering or AI/LLM tooling. - Coursework or project experience involving agentic systems, distributed systems, or LLM application development preferred. - 1–2 years of relevant work, club, or volunteer experience in software engineering preferred. - Strong written and verbal communication skills, particularly in technical contexts. - Ability to operate independently between weekly check-ins, surfacing blockers proactively rather than waiting to be asked. - Comfort working in production codebases with established conventions, code review processes, and engineering standards. - Genuine intellectual curiosity around AI, agentic systems, and emerging engineering patterns. - Attention to detail in code quality, testing, and incorporation of review feedback. - Ability to balance multiple workstreams and meet committed deadlines. - Demonstrated self-learner with interest in continued professional development and personal growth. Benefits - Superior health plan options. - Dental, Vision, HSA/FSA, Life and AD&D coverage, and more. - Top Tier 401(k) retirement savings plans that offers a $1.20 match for every dollar up to 6% plus discretionary profit-sharing contributions (eligible January following 18 months of service). - Generous paid time off starting 3-4 weeks’ annually. - Student Loan Refinancing Discounts. - Professional and Career Development Program. - EAP and travel assistance included. - Wellness program. - Purpose-driven culture focused on improving the lives of our patients, communities, and employees.

• Drive the development of highly complex systems. • Ensure the robustness of the Java ecosystem for the insurance sector.