Sr Full Stack Software Engineer - Digital Banking
Sunrise, FL, United States(Hybrid)
Job Description
Joining Amex Tech means discovering and shaping your contribution to something big. Here, you can work alongside talented tech teams and build a unique career with the Powerful Backing of American Express. With a range of opportunities to work with the latest technologies, and a commitment to back the broader engineering community through open source, our mission is to power your success. Because Amex Tech is powered by our technology, our culture, and our colleagues.
The Technology organization enables and accelerates the company's growth strategies, delivering global capabilities and services in support of Amex's customers and colleagues, while maintaining 24/7 servicing and availability to ensure an uninterrupted, high-quality customer experience. Technology provides the foundation for everything we do in the company while driving differentiation through building and leveraging innovative technology and data insights.
The U.S. Consumer Services and Membership Digital Experiences Technology team (USCDT) brings together foundational strategic technology capabilities in digital experience engineering (Mobile and Web), marketing and advertising technology, enterprise communications, travel and lifestyle, and dining technology. It employs a ground-breaking focus with development responsibilities for customer-facing capabilities that deepen and expand digital engagement, as well as core technical capabilities that cut across business lines and customer segments.
Joining the Digital Banking technology team means shaping secure, scalable, and resilient banking capabilities that support customer-facing financial experiences. In this role, you will apply deep backend engineering expertise across the software development lifecycle while partnering with product, architecture, operations, and business stakeholders to deliver high-quality platform services.
Control Tower builds mission-critical tools that help our payment platforms operate safely and efficiently. Our platform supports the development and operation of the next generation of American Express financial products.
We are hiring a Senior Full-Stack Software Engineer to design and deliver capabilities across backend services, APIs, developer tooling, and operational user interfaces. You will work on a shared platform that serves multiple products and tenants, each with distinct data, configuration, access, and operational requirements.
This is a hands-on engineering role. You will lead the technical design and delivery of complex initiatives, contribute to platform direction, mentor other engineers, and improve the standards and tooling used by the team.
Control Tower builds mission-critical tools that help our payment platforms operate safely and efficiently. Our platform supports the development and operation of the next generation of American Express financial products.
We are hiring a Senior Full-Stack Software Engineer to design and deliver capabilities across backend services, APIs, developer tooling, and operational user interfaces. You will work on a shared platform that serves multiple products and tenants, each with distinct data, configuration, access, and operational requirements.
This is a hands-on engineering role. You will lead the technical design and delivery of complex initiatives, contribute to platform direction, mentor other engineers, and improve the standards and tooling used by the team **.
Responsibilities
What you will do:**
Lead the design and implementation of full-stack platform capabilities, including domain models, backend services, APIs, and operational user interfaces.
Use domain-driven design to identify bounded @contexts, define clear ownership, and keep business rules separate from infrastructure concerns.
Design APIs with clear contracts, consistent resource models, predictable error handling, idempotency, versioning, and backward compatibility
Design multi-tenant capabilities with explicit boundaries for data, identity, configuration, workloads, and resource consumption.
Address tenant isolation, authorization, noisy-neighbor risks, quotas, tenant-aware observability, and safe tenant onboarding and migration.
Build distributed and event-driven systems that account for concurrency, ordering, consistency, retries, backpressure, partial failure, and delivery semantics.
Create processing and visualization components for real-time operational analysis.
Build accessible, responsive, and performant interfaces for operators and internal platform users.
Own services through production, including instrumentation, service-level objectives, capacity planning, incident response, and remediation.
Define an appropriate testing strategy across unit, integration, API contract, end-to-end, performance, and resilience testing.
Improve build, test, deployment, and release tooling through the continuous integration and delivery pipeline.
Use and improve large language model assisted development workflows to accelerate implementation, testing, debugging, documentation, and technical analysis while maintaining engineering, security, and review standards.
Evaluate technology choices based on reliability, security, maintainability, developer productivity, and lifecycle cost.
Write technical proposals and clearly explain architectural decisions, constraints, and trade-offs.
Mentor engineers through design reviews, code reviews, pairing, and technical guidance.
Work with product, operations, security, and engineering partners to turn business requirements into deliverable technical outcomes.
Take ownership of complex work and drive it to completion when requirements are incomplete or evolving.
Qualifications
Architecture and backend engineering
A track record of designing and delivering complex production systems as a senior engineer.
Strong experience with Java or Kotlin and the JVM ecosystem.
Experience with asynchronous, reactive, or event-driven programming.
Practical knowledge of domain-driven design, including bounded @contexts, aggregates, domain services, domain events, and integration between domains.
Strong API design skills, including HTTP semantics, schema design, compatibility, idempotency, pagination, error models, and contract testing.
A sound understanding of distributed-systems concepts such as consistency, availability, partitioning, concurrency, ordering, retries, and failure recovery
Experience building fault-tolerant and horizontally scalable services.
Experience with data modeling, transactions, caching, schema evolution, and safe data migrations.
The ability to benchmark systems, diagnose bottlenecks, and make evidence-based performance improvements.
Multi Tenant Platform Engineering
Experience designing or operating systems that serve multiple tenants, products, or business units.
An understanding of tenant-isolation models and the trade-offs between shared, partitioned, and dedicated infrastructure.
Experience enforcing tenant @context across APIs, data access, background processing, events, caches, logs, and metrics.
Knowledge of identity, authentication, authorization, least privilege, and auditable access in multi-tenant systems.
Experience designing tenant-aware configuration, feature enablement, quotas, and lifecycle management without creating tenant-specific forks.
The ability to balance shared platform capabilities with the needs of individual products.
Experience identifying and preventing cross-tenant data exposure, resource contention, and configuration leakage.
An understanding of how tenant boundaries affect deployment, migration, monitoring, support, and incident response.
Frontend engineering
Strong JavaScript or TypeScript, HTML, and CSS skills.
Experience building production applications with React or a comparable component-based framework.
Experience with client-side architecture, state management, data fetching, error handling, and frontend testing.
Knowledge of semantic HTML, accessibility, responsive and adaptive design, and browser performance.
The ability to turn complex operational data into clear and usable interfaces.
Experience designing interfaces for real-time data, degraded states, partial results, and operational errors.
AI assisted engineering
Hands-on experience with large language model assisted development workflows and coding agents such as Codex, GitHub Copilot, Claude Code, or comparable tools.
The ability to give agents clear @context, constraints, acceptance criteria, and verification steps for complex engineering work.
Experience using agents for implementation, testing, debugging, refactoring, documentation, code analysis, and repetitive development tasks.
The judgment to identify work that benefits from agent assistance and work that requires direct investigation or human decision-making.
A disciplined approach to reviewing generated code for correctness, security, performance, maintainability, and alignment with system architecture.
An understanding of common large language model failure modes, including incomplete @context, incorrect assumptions, insecure suggestions, and plausible but invalid output.
Experience protecting source code, customer data, credentials, and other sensitive information when working with approved artificial intelligence development tools.
The ability to create repeatable agent workflows and share effective practices with other engineers.
Accountability for all code and technical decisions produced with agent assistance.
Technical Leadership:
The ability to lead technical design for complex initiatives while remaining directly involved in implementation.
Strong written and verbal communication skills.
The ability to make trade-offs visible and help a team reach decisions.
Experience mentoring engineers and improving the quality of designs, code, and operational practices.
The judgment to choose established approaches when they fit and introduce new technology only when it produces a clear benefit.
The ability to work through ambiguity while keeping delivery, safety, and collaboration in balance.
Experience documenting technical decisions so that engineers outside the original discussion can understand the @context and constraints.
The ability to identify risks early, challenge assumptions, and adjust an approach when evidence shows that it is not working.
Employment eligibility to work with American Express in the United States is required as the company will not pursue visa sponsorship for these positions.
At American Express, our culture is built on a 175-year history of innovation, shared values (https://www.americanexpress.com/en-us/company/who-we-are/) and Leadership Behaviors, and an unwavering commitment to back our customers, communities, and colleagues. From delivering differentiated products to providing world-class customer service, we operate with a strong risk mindset, ensuring we continue to uphold our brand promise of trust, security, and service.
As part of Team Amex, you'll experience our powerful backing with comprehensive support for your holistic well-being and many opportunities to learn new skills, develop as a leader, and grow your career. Here, your voice and ideas matter, your work makes an impact, and together, you will help us define the future of American Express.
We back you with benefits that support your holistic well-being so you can be and deliver your best. This means caring for you and your loved ones' physical, financial, and mental health, as well as providing the flexibility you need to thrive personally and professionally:
Competitive base salaries
Bonus incentives
6% Company Match on retirement savings plan
Free financial coaching and financial well-being support
Comprehensive medical, dental, vision, life insurance, and disability benefits
Flexible working model with hybrid, onsite or virtual arrangements depending on role and business need
20+ weeks paid parental leave for all parents, regardless of gender, offered for pregnancy, adoption or surrogacy
Free access to global on-site wellness centers staffed with nurses and doctors (depending on location)
Free and confidential counseling support through our Healthy Minds program
Career development and training opportunities
For a full list of Team Amex benefits, visit our Colleague Benefits Site (https://www.americanexpress.com/en-us/colleagues/benefits) .
American Express is an equal opportunity employer and makes employment decisions without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran status, disability status, age, or any other status protected by law. American Express will consider for employment all qualified applicants, including those with arrest or conviction records, in accordance with the requirements of applicable state and local laws, including the California Fair Chance Act, the Los Angeles County Fair Chance Ordinance for Employers, and the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance. For positions covered by federal and/or state banking regulations, American Express will comply with such regulations as it relates to the consideration of applicants with criminal convictions.
We back our colleagues with the support they need to thrive, professionally and personally. That's why we have Amex Flex, our enterprise working model that provides greater flexibility to colleagues while ensuring we preserve the important aspects of our unique in-person culture. Depending on role and business needs, colleagues will either work onsite, in a hybrid model (combination of in-office and virtual days) or fully virtually.
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The below represents the expected salary range for this job requisition. Ultimately, in determining your pay, we'll consider your location, experience, and other job-related factors.
Job Info
Job Identification 26015501
Job Category Technology
Posting Date 10/26/2026, 04:00 AM
Apply Before 11/10/2026, 05:00 AM
Job Schedule Full time
Job Shift Day
Locations 1500 NW 136th Avenue, Sunrise, FL, 33323, US(Hybrid)
Salary Range $123000 - $215250 annually + bonus + benefits
Career Area Technology
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