Role Description We’re looking for an experienced Senior Backend Engineer to design, build, and ship product features end to end across Air’s web platform. - You’ll own every step of the development lifecycle—requirements gathering, architecture, implementation, testing, release, and iteration—while collaborating closely with Product, Design, and fellow engineers. - Collaborate with Product and Design to break down ambiguous problems into clear requirements and thoughtful technical decisions. - Own the entire development cycle, from ideation to deployment - across our React/Node stack. - Participate in on-call rotations, tech-spec reviews, and code reviews. - Continuously improve engineering practices, suggesting and delivering enhancements across both frontend and backend codebases. - Help grow the team by interviewing and mentoring engineers. - Drive projects forward in a high-velocity, resource-constrained environment where requirements may be lightly defined. - Proactively create clarity, seek support from stakeholders, and occasionally wear a product hat to keep initiatives moving. - Work fluidly across frontend and backend technologies, including React, TypeScript, Next.js, Node.js, Vercel, and modern tooling. - Design APIs, architect data models, and implement UI components that scale. - Offer thoughtful feedback on technical designs and code reviews. - Advocate for high-quality technical decisions and best practices, helping to set the standard for Air’s engineering culture. Benefits - Air contributes 90% to medical, dental, and vision insurance and 75% to dependent coverage. - Employees also have life insurance, disability insurance, and membership to One Medical. - 401k program. - Commuter benefits. - Generous work from home stipend. - Professional development reimbursement. - Unlimited vacation days.

• Design and implement back end application components, such as FHIR operations, primarily using Java and related technologies. • Develop and maintain core product code, with a focus on quality, performance, and maintainability. • Participate in code reviews, adhere to team coding standards, and contribute to improving development practices. • Analyze requirements and propose technical solutions at various stages of development. • Build and iterate on proof-of-concept integrations. • Troubleshoot and resolve issues reported by customers or identified during testing. • Research relevant technologies and contribute findings to the team. • Create and maintain technical documentation.

• 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.