• 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.

Role Description As Marqeta’s Senior Cloud Database Engineer, you will join our Cloud Database Engineering team wherein you will be responsible for all databases that power Marqeta’s card issuing platform. You’ll be at the heart of all things Databases: - Automating the lifecycle of AWS Aurora instances. - Working closely with application teams to analyze Database performance. - Innovating in building Marqeta’s next-generation, highly available and resilient Database solutions. Marqeta’s platform supports high cardholder availability across multiple regions globally, serving over 5 billion transactions annually. The Cloud Database Engineering team operates at the center of everything Marqeta does, and there is endless opportunity to make a sizable impact across your team and the whole business. We work Flexible First. This role can be performed remotely anywhere within Ontario or British Columbia, Canada. We’d love for you to join us! Qualifications - 5+ years experience as a backend engineer and a Bachelor's degree. In lieu of a degree, 7+ years of relevant experience may suffice. - Experienced with cloud native databases (AWS preferred), including transactional RDBMS such as Aurora, MySQL, and Postgres, as well as NoSQL databases such as DynamoDB or MongoDB. - Experienced in cloud based high availability, disaster recovery, and distributed systems including replication and failover. - Experienced in IaaC, automation and orchestration tools (Terraform, AWS Step Function, etc.). - Experienced CI/CD — pipelines, job runners, deployment automation. - Solid understanding of database administration: internals, query tuning, indexing, and performance metrics. - Proficient in Python. - Experience with Linux commands and shell scripting. - Experienced in monitoring and observability tools: Datadog preferred. - Strong sense of ownership — you follow through, raise issues proactively, and take accountability for your work. - Curious and committed to continuous learning — you actively keep up with industry trends and apply new knowledge to your work. - You have a team-oriented approach – can effectively work on a project and cross-functionally with other teams. Requirements - Logical/physical migrations + blue-green switchovers (current strategic work). - Database fleet management. - AI tooling fluency. - Basics in Java. - Experience with payments or the FinTech space. - Experience with ProxySQL and/or RDS Proxy. Benefits - Multiple health insurance options. - Flexible vacation time. - Retirement savings program with company contribution. - Equity in a publicly-traded company. - Monthly stipend to support our remote work model. - Annual “development dollars” to support our people growth and development. - Family-forming benefits and up to 20 weeks of Parental Leave. Company Description Marqeta is on a mission to change the way money moves. We’re one of the earliest enablers of embedded finance, a market opportunity sized up in the trillions. Our card issuing platform provides unprecedented flexibility and control for companies to issue cards, authorize transactions, and manage payment operations in real time. Marqeta is powering the most well-known brands in the new economy (Block, Cash App, Affirm, Instacart, Doordash, Uber, Walmart, etc). You don’t need to be a Payments expert to join the Marqeta Team, let us help you with that. This is the opportunity of a lifetime to work with innovators around the world and unlock equitable financial access for all.

• Actively participate across the entire solution conception and development lifecycle, from the Discovery process—helping to identify the right problem to solve • Contribute to technical refinements to structure solution designs • Interact with interdependent squads to ensure alignment and integration of solutions • Develop frontend (React) and backend (.NET Core) layers as required, including unit tests to ensure quality and security • Ensure proper configurations for DevOps processes, and plan and monitor production deployments • Monitor the post-release environment to ensure stability and performance • Apply advanced AI techniques, using tools such as Python (LangChain, Langgraph), RAG, prompt engineering and agent evaluation (EVALs) • Work with AWS infrastructure (DocumentDB, Lambda, ECS, S3, Redis) and CI/CD tools (GitHub Actions, Terraform, Docker) • Collaborate on the development and integration of intelligent agents; knowledge of MCP and Go is a plus

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.