Senior Java Back - End Developer - Assistant Vice President

Citi; Mississauga; On-site; CAD 133,000 - 200,000; Full time

Job summary

Citi is seeking a Senior Java Back-End Developer in Mississauga to lead end-to-end architecture and delivery of mission-critical systems. You will own design decisions, mentor senior engineers, and collaborate with product, security, and platform teams to build scalable, secure distributed services.

The role emphasizes hands-on development with Java 17+, Spring Boot, REST/GraphQL, and Kafka, plus cloud, Kubernetes, CI/CD, and IaC.

Qualifications

• 5+ years of progressive experience building enterprise systems with Java and Spring at scale.
• Proven delivery of cloud-native, microservices, and event-driven architectures.
• Strong expertise in Java 11/17+, REST/GraphQL APIs, Kafka or Pulsar, Kubernetes, Docker.

Responsibilities

• Define and evolve system architecture for cloud-native platforms with scalability, resilience, and security.
• Lead squads through full SDLC from discovery to production and SRE handoff.
• Mentor senior engineers and drive secure-by-default patterns and coding standards.
• Build core services using Java (17+), Spring Boot, REST/GraphQL, and message streaming; optimize performance and observability.
• Design for AWS/Azure/GCP, Kubernetes, CI/CD, and IaC; collaborate with SRE/Platform for monitoring and cost governance.
• Architect integrations across SQL/NoSQL, caching, and event streams; define data contracts and idempotent styles.
• Embed AppSec best practices, OWASP controls, OAuth2/OIDC, and zero-trust concepts; ensure regulatory compliance.

Skills

Leadership

Mentorship

Communication

Stakeholder management

Architectural leadership

Education

Bachelor’s degree or equivalent experience

Tools

Java 11/17+

Spring Boot

Spring Cloud

REST/GraphQL APIs

gRPC

Kafka / Pulsar

Kubernetes

Docker

RDBMS (PostgreSQL/MySQL/Oracle)

NoSQL (MongoDB/Cassandra/DynamoDB)

Redis

CI/CD (GitHub Actions/Azure DevOps/Jenkins)

IaC (Terraform/ARM)

Observability (OpenTelemetry, Prometheus/Grafana, ELK)

Job description

Role Summary

We’re seeking a seasoned Senior Java Back - End Developer with 5+ years of experience to lead end-to-end technical design and delivery of mission‑critical systems. You will own architecture decisions, drive engineering excellence, mentor senior engineers, and partner with product, security, and platform teams to build scalable, reliable, and secure distributed systems.

Key Responsibilities

• Architecture & Design
  • Define and evolve system architecture for cloud-native, microservices/event-driven platforms (scalability, resilience, security, cost).
  • Create high-level and low-level designs, integration patterns, API contracts, and reference implementations.
  • Lead design reviews; ensure alignment with domain-driven design (DDD), 12‑factor principles, and organization standards.
• Engineering Leadership
  • Lead squads through full SDLC—from discovery and PoCs to production and SRE handoff.
  • Establish coding standards, code review practices, and secure‑by‑default patterns.
  • Mentor and coach senior engineers; support career growth and succession of technical leaders.
• Hands‑on Development
  • Build core services using Java (17+), Spring Boot, REST/GraphQL, and message/event streaming.
  • Optimize for performance, concurrency, observability, and operational excellence (SLOs, error budgets).
  • Drive quality with unit/integration/contract testing, test data strategy, and automated quality gates.
• Cloud & Platform
  • Design for AWS/Azure/GCP, container orchestration (Kubernetes), service mesh, and CI/CD.
  • Implement infrastructure‑as‑code (IaC) patterns and secrets management.
  • Partner with SRE/Platform teams on monitoring, alerting, logging, tracing, and cost governance.
• Data & Integration
  • Architect integrations across SQL/NoSQL, caching (Redis), and event streams (Kafka/Pulsar).
  • Define data contracts, schema evolution strategies, and idempotent/eventual consistency patterns.
• Security & Compliance
  • Embed AppSec best practices, OWASP controls, secure API/auth (OAuth2/OIDC), and zero trust patterns.
  • Ensure compliance with regulatory and audit requirements where applicable.
• Stakeholder Partnership
  • Translate business needs into technical roadmaps and architecture runway.
  • Communicate trade‑offs and decisions to both technical and non‑technical audiences.
• GenAI : Knowledge of MCP, A2A, Agentic Architecture

Required Qualifications

• 5+ years of progressive experience building enterprise systems, with 5+ years in Java and Spring at scale.
• Proven delivery of cloud‑native, microservices, and event‑driven architectures.
• Strong expertise in:
  • Java 11/17+, Spring Boot, Spring Cloud
  • REST/GraphQL APIs, gRPC (nice-to‑have)
  • Kafka (or Pulsar), Kubernetes, Docker
  • RDBMS (PostgreSQL/MySQL/Oracle) and NoSQL (MongoDB/Cassandra/DynamoDB)
  • Caching (Redis), CI/CD (GitHub Actions/Azure DevOps/Jenkins), IaC (Terraform/ARM)
  • Observability (OpenTelemetry, Prometheus/Grafana, ELK), feature flags/progressive delivery
• Solid grasp of concurrency, performance tuning, resiliency patterns (circuit breakers, retries, bulkheads), and fault‑tolerance.
• Demonstrated leadership of architectural forums, design reviews, and mentorship.
• Strong communication and stakeholder management skills.

Nice‑to‑Have

• Domain knowledge: Payments, banking, capital markets, insurance, e‑commerce, supply chain, or telecom.
• Security: Threat modeling, shift‑left security, SAST/DAST, secrets rotation, mTLS.
• Data: CDC (Debezium), schema registry, exactly‑once semantics, streaming ETL.
• Platform: Service mesh (Istio/Linkerd), API gateways (Kong/Apigee), Serverless (Lambda/Functions).
• Modern patterns: CQRS, event sourcing, Saga orchestration, hexagonal architecture.

Education

• Bachelor’s degree/University degree or equivalent experience

Job Family Group

Technology

Job Family

Applications Development

Time Type

Full time

Primary Location Full Time Salary Range

$94,300.00 - $141,500.00

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

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

Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision‑making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

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