Java and Python Developer

We are seeking a proactive, detail-orientedSoftware Development Engineer (C10) with strong hands-on development expertise in bothPython andJava. In this role, you will be part of a collaborative, high-impact engineering team responsible for designing, developing, and enhancing scalable backend services, data pipelines, and microservices supporting mission-critical enterprise platforms.

As a C10 Applications Development Analyst, you will work across the full Software Development Life Cycle (SDLC) under Agile methodologies—participating in requirement analysis, system architecture discussions, hands-on coding, automated testing, code reviews, and production support.

Key Responsibilities

1. Software Design & Development

• Develop, maintain, and enhance robust, scalable backend applications usingJava (Spring Boot / Core Java) andPython (FastAPI / Flask / Django / Scripting / Data Processing).
• Build clean, secure RESTful APIs, microservices, and asynchronous event-driven integrations (e.g., Apache Kafka, RabbitMQ, or JMS).
• Optimize application performance, throughput, memory management, and database query execution.

2. Quality Assurance & Engineering Best Practices

• Write clean, modular, and maintainable code adhering to enterprise coding standards and SOLID principles.
• Develop comprehensive automated unit, integration, and component tests using frameworks such asJUnit, Mockito, PyTest, or Unittest.
• Maintain high code coverage and resolve static code analysis findings (e.g., SonarQube, security vulnerabilities).

3. CI/CD & DevOps Automation

• Integrate applications with modern CI/CD pipelines (e.g., GitHub Actions, Jenkins, Tekton, Harness).
• Containerize services usingDocker and support deployments onto container orchestration platforms (e.g., Kubernetes / Red Hat OpenShift).
• Participate in environment setup, automated deployment validation, and release management.

4. Collaboration & Agile Delivery

• Actively participate in Agile ceremonies including Sprint Planning, Daily Standups, Backlog Refinement, and Retrospectives.
• Collaborate with business analysts, technical leads, UI/Frontend engineers, database administrators, and QA teams.
• Conduct constructive peer code reviews and contribute to technical documentation (architecture diagrams, API specs in OpenAPI/Swagger).

5. Production Support & Operational Excellence

• Assist in triage, root cause analysis (RCA), and remediation of Level 3 production issues.
• Monitor application health and diagnostics using observability tools (e.g., Prometheus, Grafana, Splunk, OpenTelemetry).

Technical Qualifications & Skill Requirements

Core Programming & Frameworks

• Python: Strong proficiency in Python 3.x, data structures, asynchronous programming, scripting, and web frameworks (FastAPI, Flask, or Django) or data manipulation libraries (Pandas, NumPy).
• Java: Solid foundational knowledge of Java 11/17+, OOP design patterns, multithreading, concurrency, collections, and theSpring / Spring Boot ecosystem (Spring MVC, Spring Data, Spring Security).

API & Integration

• Practical experience designing and implementingRESTful APIs with OpenAPI/Swagger specifications.
• Familiarity with message brokers and streaming platforms (e.g.,Kafka, ActiveMQ, or IBM MQ).

Databases & Persistence

• Experience with relational databases (PostgreSQL, Oracle, SQL Server, or MySQL), including schema design, indexing, and complex SQL queries.
• Exposure to ORM frameworks (Hibernate/JPA, SQLAlchemy) and/or NoSQL datastores (MongoDB, Redis, Elasticsearch).

DevOps, Cloud & Tooling

• Hands-on experience with version control tools (Git / GitHub / Bitbucket).
• Familiarity with build tools such asMaven / Gradle (Java) andpip / poetry / uv (Python).
• Basic understanding ofDocker, Kubernetes/OpenShift, and cloud fundamentals (AWS, GCP, or Azure).
• Knowledge of automated testing frameworks (JUnit, PyTest) and CI/CD tools.

Educational Background & Experience

• Education: Bachelor’s degree in Computer Science, Computer Engineering, Information Technology, or related quantitative field (or equivalent practical experience).
• Experience: Approximately 2-4 yearsof professional software engineering experience with demonstrable proficiency in both Python and Java.
• Certifications (Optional / Plus):
  • Oracle Certified Professional: Java Programmer
  • Cloud certifications (AWS Solutions Architect/Developer Associate, Google Cloud Certified)
  • Kubernetes certifications (CKAD)

Professional & Behavioral Competencies

• Analytical Problem Solving: Strong critical thinking skills with an ability to debug complex issues across hybrid Java/Python architectures.
• Communication: Clear verbal and written technical communication skills; comfortable articulating design trade-offs to both technical and non-technical stakeholders.
• Teamwork & Ownership: Self-driven, collaborative mindset with an emphasis on accountability, continuous learning, and adaptability in a fast-paced environment.

Education:

• Bachelor’s degree/University degree or equivalent experience

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

------------------------------------------------------

Job Family Group:

------------------------------------------------------

Job Family:

------------------------------------------------------

Time Type:

------------------------------------------------------

Most Relevant Skills

------------------------------------------------------

Other Relevant Skills

------------------------------------------------------

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity reviewAccessibility at Citi.

View Citi’sEEO Policy Statement and theKnow Your Rights poster.