Citigroup, Inc

Senior Lead Software Engineer, Payment Systems - Vice President

Citigroup, Inc • $120K — $170K *
Mississauga, ON L4T 0A1In-Person
Finance & Insurance
5 - 7 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 6+ years in software engineering, 3+ in technical leadership role.
  • Expertise in Java and Spring Boot for microservices.
  • Knowledge of resilience engineering patterns for payment systems.
  • Experience with messaging platforms like Apache Kafka or RabbitMQ.
  • Familiarity with Docker and Kubernetes for containerization.
  • Proficiency in relational and NoSQL databases.
  • Understanding of CI/CD practices and AI-powered developer tools.

Responsibilities

  • Lead software development lifecycle for payment applications.
  • Design high-throughput microservices using Java and Spring Boot.
  • Architect multi-region failover and zero-downtime release models.
  • Promote Domain-Driven Design and event-driven architecture.
  • Define API standards for scalable integrations.
  • Mentor engineering team on code quality and reliability.
  • Integrate AI/ML capabilities into payment workflows.
  • Collaborate with teams to turn complex requirements into solutions.

Benefits

  • Hybrid work model for flexibility and collaboration.
  • Ownership of critical global payment infrastructure.
  • Access to TTS Innovation Labs for cutting-edge financial tech.
  • Opportunities for continuous learning and development.
  • Comprehensive wellbeing benefits for senior talent.
  • Global exposure across diverse engineering and operations teams.
Full Job Description
Citi's Core Payment Systems team is looking for a Senior Lead Software Engineer to architect and drive the modernization of global payment processing platforms that move USD 4 trillion in client transactions every day. In this critical technical leadership role, you will define the engineering vision for resilient, high-throughput microservices that sit at the heart of Citi's transaction infrastructure - spanning 160 countries and over 140 currencies. Sitting within Citi's Treasury and Trade Solutions (TTS) business, one of the most expansive financial services networks in the world, you will shape the next generation of payment technology at a scale few engineering roles can match.

Responsibilities
  • Lead the full software development lifecycle for mission-critical payment applications, from initial architecture through to deployment and ongoing production ownership.
  • Design and build high-throughput, low-latency microservices using Java 8+, Spring Boot, and cloud-native principles to power global payment processing at enterprise scale.
  • Architect active-active multi-region failover strategies, zero-downtime release models, and blue-green or canary deployment pipelines to achieve and sustain 99.99%+ system availability.
  • Champion the adoption of Domain-Driven Design (DDD), event-driven architecture, and containerization using Docker and Kubernetes/OpenShift to modernize legacy payment platforms.
  • Define and enforce API standards for RESTful and event-based interfaces, ensuring every integration is consistent, secure, and built to scale.
  • Mentor and guide a cross-functional engineering team, establishing code review practices and raising the bar for technical quality, reliability, and innovation across the team.
  • Integrate AI-powered developer tools and AI/ML capabilities - including anomaly detection, intelligent test generation, and observability platforms - into production payment workflows to accelerate delivery and improve system intelligence.
  • Partner with product managers, business analysts, and operations teams to translate complex financial requirements into scalable, maintainable technical solutions.


Required Qualifications & Skills
  • 6+ years of software engineering experience delivering complex, enterprise-scale applications, with at least 3 years in a technical leadership role setting direction for development teams.
  • Expert-level command of Java and the Spring Boot framework for building and operating production microservices, alongside solid front-end capability in Angular, HTML5, and CSS3.
  • Deep practical knowledge of resilience engineering patterns including Circuit Breakers, Saga orchestration for distributed transactions, and idempotent API design applied to high-throughput payment pipelines.
  • Hands-on experience with messaging and event-streaming platforms such as Apache Kafka or RabbitMQ, and with containerization technologies including Docker and Kubernetes.
  • Proficiency across both relational databases (such as Oracle) and NoSQL databases (such as MongoDB), with the ability to select and optimize the right data layer for a given use case.
  • Solid grasp of CI/CD pipeline design, automated testing strategies, and modern DevOps practices that support continuous, zero-disruption delivery.
  • Demonstrated ability to adopt and scale AI-powered development tools - such as GitHub Copilot or equivalent LLM-based platforms - within an enterprise engineering team to measurably improve delivery velocity.
  • Experience establishing end-to-end observability stacks including distributed tracing, real-time alerting, and production dashboards across complex, microservices-based environments.


Beneficial Skills & Qualifications
  • Familiarity with financial services or payments industry standards such as SWIFT, ISO 20022, or clearing and settlement systems.
  • Experience integrating AI/ML capabilities such as predictive alerting or intelligent test generation into regulated, production financial systems.
  • Exposure to AI-driven observability platforms to maintain visibility and proactive response across distributed payment ecosystems.


What We Offer

At Citi, you will work on systems that matter - processing trillions of dollars in payments for 80% of the Global Fortune 500, more than 1,100 public sector organizations, and thousands of financial institutions across the globe. This is an opportunity to lead at genuine scale, backed by a team that values engineering quality, continuous learning, and real impact on global financial infrastructure.
  • A hybrid working model with 3 days in the office and 2 days working remotely, giving you flexibility alongside meaningful in-person collaboration.
  • Strategic technical ownership over global payment infrastructure that underpins some of the most consequential financial flows in the world.
  • Access to Citi's TTS Innovation Labs, where engineers collaborate with clients to build and pilot next-generation financial technology solutions.
  • Continuous learning and professional development resources to keep you at the forefront of engineering practices, including AI-accelerated development tooling.
  • Competitive financial reward and wellbeing benefits calibrated to senior engineering talent.
  • Broad exposure across a global business operating in 160 countries, with the opportunity to collaborate with world-class engineering, product, and operations teams.


Build the payment infrastructure that moves the world - apply now and bring your engineering leadership to one of Citi's most technically ambitious teams.

Job Family Group:
Technology

Job Family:
Applications Development

Time Type:
Full time

Primary Location Full Time Salary Range:
$120,800.00 - $170,800.00

Most Relevant Skills
Please see the requirements listed above.

Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.

About Citigroup, Inc

Citigroup is a financial services holding company that provides financial products and services. The company operates through two segments, Global Consumer Banking (GCB) and Institutional Clients Group (ICG). The GCB segment offers traditional banking services to retail customers through retail banking, commercial banking, Citi-branded cards, and Citi retail services. The ICG segment offers various banking, and financial products and services to corporate, institutional, public sector, and high-net-worth clients. This segment provides wholesale banking products and services, including fixed-income and equity sales and trading, foreign exchange, prime brokerage, derivative services, equity and fixed-income research, corporate lending, investment banking, and advisory services, private banking, cash management, trade finance, and securities services. Citi is committed to sustainability and social responsibility, and the company invests in initiatives that promote economic progress.

Citigroup, Inc Careers

Join the vibrant team at Citigroup, Inc, a leading global bank, and propel your career into the future. Citigroup offers a plethora of job opportunities that span across various fields and expertise, making it an ideal place for ambitious professionals to thrive.

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Learn more about Citigroup, Inc
Market Cap
$1.3 billion
Industry
Finance & Insurance
Net Income
$89.6 million
Founded
1812
5 Year Trend
+4.6%
NASDAQ
C
* Ladders Estimates

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