• Develop cross-platform mobile applications (Android and iOS) using Flutter • Create responsive interfaces focused on optimal user experience • Integrate applications with REST and GraphQL APIs • Implement solutions using Firebase (Authentication, Push Notifications and Analytics) • Design, deploy and maintain solutions on Google Cloud Platform (GCP) • Configure and manage environments on Google Kubernetes Engine (GKE) • Develop and maintain CI/CD pipelines using Cloud Build and Cloud Run • Monitor applications and infrastructure using Cloud Logging and Cloud Monitoring • Work on optimizing performance, security and cost of cloud environments • Participate in agile ceremonies and collaborate with cross-functional teams

Role Description We are seeking an experienced Senior Mainframe Systems Programmer to support and maintain IBM z/OS environments, with a strong focus on CICS Transaction Server and IBM MQ. This role is responsible for system administration, software installation and upgrades, troubleshooting, performance tuning, security compliance, disaster recovery support, and technical documentation in a secure, highly regulated enterprise environment. The ideal candidate has deep hands-on experience with IBM mainframe technologies, middleware administration, change and incident management, and supporting mission-critical systems with high availability and operational stability. Key Responsibilities - Administer, install, configure, upgrade, and maintain IBM z/OS mainframe environments, including CICS Transaction Server, IBM MQ, and related software products. - Perform software installations, migrations, upgrades, patching, and implementation activities across multiple mainframe environments. - Troubleshoot and resolve system abends, outages, and performance issues using logs, traces, dumps, and monitoring tools. - Manage IBM MQ environments, including queue managers, queues, channels, backup processing, and web services administration. - Monitor and tune system and middleware performance to ensure availability, reliability, and operational efficiency. - Support secure and compliant system operations in accordance with cybersecurity and enterprise security requirements. - Develop and execute implementation plans, test plans, recovery plans, and back-out procedures for software and hardware changes. - Coordinate change management, incident management, CAB activities, and cross-functional implementation efforts using approved operational processes and tools. - Create and maintain technical documentation, standard operating procedures, implementation guides, root cause analysis reports, and status updates. - Utilize SMP/E, JCL, TSO/ISPF, REXX, CLIST, COBOL, and related IBM utilities to support administration, automation, and system operations. - Support backup, recovery, and disaster recovery planning, testing, and execution. - Provide technical guidance, mentoring, training, and customer support to project teams, junior staff, and stakeholders. - Collaborate with infrastructure, cybersecurity, application, and operations teams to ensure stable and secure mainframe services. Qualifications - Active Top Secret Security Clearance. - DoD IAT Level II certification required. - Minimum of 8 years of experience in mainframe systems programming, administration, or support. - Bachelor’s degree in Information Technology, Computer Science, Engineering, or a related field, or equivalent combination of experience and training. - Strong hands-on experience with IBM z/OS, CICS Transaction Server, and IBM MQ. - Experience with software installation, upgrades, patching, maintenance, and migration activities in enterprise mainframe environments. - Experience troubleshooting system abends, dumps, traces, and performance issues in production environments. - Working knowledge of SMP/E, JCL, TSO/ISPF, REXX, CLIST, and related IBM mainframe utilities.

• Lead the technical development of backend solutions, ensuring a scalable and sustainable architecture. • Define and review technical standards, best practices, and development guidelines. • Work on modeling and evolving the architecture (monolith, microservices, messaging, etc.). • Conduct structured code reviews and provide technical guidance to mid-level and junior developers. • Participate in strategic technology decisions aligned with the product vision. • Define solutions with a focus on performance, security, and scalability. • Support technical roadmap planning and complex estimations. • Identify technical risks and propose preventive solutions. • Ensure technical quality through automated tests, appropriate coverage, and best practices. • Respond to critical incidents and perform root cause analysis. • Propose continuous improvements to the tech stack and development processes. • Serve as a technical bridge between product, infrastructure, and other areas.

About Upstart At Upstart, we’re united by a mission that matters: to radically reduce the cost and complexity of borrowing for all Americans. Every day, we bring creativity, experimentation, and advanced AI to reshape access to credit, helping millions move forward financially with clarity and confidence. As the leading AI lending marketplace, we partner with banks and credit unions to expand access to affordable credit through technology that’s both radically intelligent and deeply human. Our platform runs over one million predictions per borrower using more than 1,800 signals, powering smarter, fairer decisions for millions of customers. But the numbers only hint at the impact. Every idea, every voice, and every contribution moves us closer to a world where credit never stands between people and their financial progress. We’re proudly digital-first, giving most Upstarters the flexibility to do their best work from wherever they thrive, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn’t mean distant. We’re intentional about in-person connection through team onsites, planning sessions, and moments that spark creativity and trust. And whether you choose to work primarily from home or collaborate in-person from one of our offices in Columbus, Austin, the Bay Area, or New York City (opening Summer 2026), you’ll have the support to work in the way that works best for you. If you’re energized by tackling meaningful problems, excited to innovate with purpose, and motivated by work that truly matters, we’d love to hear from you. The Team: Upstart Bank is an evolution of Upstart’s AI lending platform, focused on simplifying the regulatory infrastructure behind our marketplace while expanding access to credit nationwide. By moving from a fragmented, state-based system to a unified federal framework, Upstart Bank enables more consistent borrower experiences, reduces structural costs, and unlocks opportunities to improve pricing and access to credit at scale. As a Senior Software Engineer on the Upstart Bank team, you will design and build systems that enable Upstart Bank to operate at scale. Depending on the team, your work may span funding, payments, reporting, partner integrations, and internal operational workflows. You’ll help build reliable, audit-ready software in a regulated environment while supporting seamless borrower and partner experiences. How you’ll make an impact - Design and build scalable systems, services, and user-facing workflows that support Upstart Bank’s core platform and operations - Own technical design and delivery for medium-to-large engineering projects spanning multiple quarters - Translate business, operational, and regulatory requirements into reliable, maintainable software - Improve system reliability, performance, observability, and data consistency across distributed services and integrations - Contribute to architecture and design discussions, helping systems evolve for scale, auditability, and long-term maintainability - Partner with product, compliance, operations, and other engineers to deliver high-quality solutions in a regulated environment - Uphold a high engineering bar through strong implementation, code review, testing, and operational ownership Minimum Qualifications - Bachelor’s degree in Computer Science, Engineering, or Mathematics, or a related field (or its equivalent) + 4 years of experience - Experience building and operating production software systems in backend or full-stack environments - Experience building scalable services, APIs, or web applications in cloud environments - Experience owning the technical delivery of medium-to-large engineering projects spanning multiple quarters - Proficiency in at least one modern programming language such as Python, Java, or Kotlin Preferred Qualifications - Experience working in fintech, banking infrastructure, payments, or other regulated financial systems - Familiarity with distributed systems, event-driven architectures, and communication frameworks such as Kafka or gRPC - Experience building systems that support reliability, auditability, and strong operational controls - Experience working with reporting pipelines, financial data flows, partner integrations, or internal operational tooling - Ability to collaborate effectively with product, compliance, operations, and engineering partners - Experience working across both backend services and user-facing application layers - Proven ability to thrive in diverse work environments, including collaborative, self-directed, remote, and in-person settings. Position location This role is available in the following locations: Remote Time zone requirements The team operates on the East/West coast time zones. Travel requirements As a digital first company, the majority of your work can be accomplished remotely. The majority of our employees can live and work anywhere in the U.S but are encouraged to to still spend high quality time in-person collaborating via regular onsites. The in-person sessions’ cadence varies depending on the team and role; most teams meet once or twice per quarter for 2-4 consecutive days at a time. #LI-REMOTE #LI-MidSenior --> use for L5, L6 At Upstart, your base pay is one part of your total compensation package. The anticipated base salary for this position is expected to be within the below range. Your actual base pay will depend on your geographic location–with our “digital first” philosophy, Upstart uses compensation regions that vary depending on location. Individual pay is also determined by job-related skills, experience, and relevant education or training. Your recruiter can share more about the specific salary range for your preferred location during the hiring process. In addition, Upstart provides employees with target bonuses, equity compensation, and generous benefits packages (including medical, dental, vision, and 401k). United States | Remote - Anticipated Base Salary Range $166,900—$242,400 USD What you'll love At Upstart, our benefits are designed to support your health, financial well-being, family, and personal growth. Here’s what you can expect: - Competitive compensation, including base pay, bonus opportunities, and annual equity grants that vest quarterly - Retirement benefits to help you plan for the future, including a 401(k) or Group Retirement Savings Plan with a company match of $2 for every $1 contributed, up to $15,000 annually (USD in the US, CAD in Canada) - Employee Stock Purchase Plan (ESPP) with discounted stock purchase options for eligible employees (US only) - Comprehensive health coverage designed to support you and your family, including medical, dental, vision, and wellness resources for US and supplemental health coverage for Canada. - Health Savings Account contributions from Upstart for eligible plans (US only) - Income protection benefits, including life insurance and disability coverage for added financial security - Paid time off, sick leave, and company holidays, in line with local requirements - Paid family and parental leave to support caregiving and major life moments (duration varies by country) - Family-centered benefits to support fertility, parenthood, and caregiving needs - Employee Assistance Program (EAP) offering mental health support and life-centered resources - Financial wellness resources, including access to financial planning tools and a financial concierge service (US Only) - Annual wellness allowance to support your physical and emotional well-being and personal development, based on what matters most to you - Annual productivity allowance to invest in relevant tools and resources you need to do your best work, no matter where you work from - Connection and community through team events, all-company updates, and employee resource groups (ERGs) - Onsite perks, including catered lunches and fully stocked micro-kitchens when working from one of our offices in the Bay Area, Austin, Columbus, and New York City (opening Summer 2026!) For roles based in Canada, please note that we are not currently able to hire in Quebec. Upstart is a proud Equal Opportunity Employer. Just as we are dedicated to improving access to affordable credit for all, we are committed to inclusive and fair hiring practices. If you require reasonable accommodation in completing an application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please email candidate_accommodations@upstart.com https://www.upstart.com/candidate_privacy_policy