Senior Python Application Developer

Citibank (Switzerland) AG; Pune District; On-site; Confidential; Full time

Job summary

Citibank (Switzerland) AG is seeking a Senior Python Application Developer in Pune, Maharashtra. This role involves developing high-performance applications using Python and leading cross-functional teams. Candidates should have over 8 years of experience, proven expertise in software architecture, and a strong background in AI and machine learning. The position requires hands-on experience with modern development practices, CI/CD pipelines, and cloud technologies such as AWS or Azure. The position offers full-time employment within a dynamic technology environment.

Qualifications

• Proven track record of technical leadership in Python development.
• Expert-level proficiency in Python application development.
• Experience with microservices and event-driven architectures.

Responsibilities

• Architect, develop, and deliver mission-critical applications.
• Lead cross-functional engineering teams and enforce code quality.
• Integrate AI systems into software workflows.

Skills

Python 3.x

Asynchronous programming

Microservices

CI/CD

AI/Machine Learning

Education

8+ years in application development

Tools

PostgreSQL

Docker

Kubernetes

Job description

## Senior Python Application DeveloperApplylocations: Pune Maharashtra India: 1/124, SHIVAJI GARDENS, MOONLItime type: Full timeposted on: Posted Yesterdayjob requisition id: 26960320**Senior Python Application Developer**We are seeking an exceptionally skilled and driven Lead Python Application Developer to architect, develop, and deliver mission-critical enterprise applications within a high-performance Python ecosystem. This role demands a seasoned technologist with a proven track record of technical leadership, deep expertise in scalable system design, and a passion for driving innovation through cutting-edge Python development. The successful candidate will play a pivotal role in shaping our technical roadmap, mentoring engineering teams, and ensuring the robust, secure, and efficient execution of strategic initiatives.# Required Qualifications:## I. Advanced Technical Leadership & Architectural Acumen:* **8+ years** of progressive experience in application development and systems architecture, with a laser focus on Python-centric solutions.* Demonstrable expertise in end-to-end software development lifecycle (SDLC) leadership, from strategic planning and solution architecture to deployment and post-production optimization.* Proven capability to lead and inspire cross-functional engineering teams, foster a culture of technical excellence, and enforce rigorous code quality standards through comprehensive code reviews and design critiques.* Act as a Subject Matter Expert (SME) in advanced Python paradigms, including asynchronous programming (asyncio), concurrency, and parallel processing, alongside profound knowledge of modern frameworks such as FastAPI, Django REST Framework, and Flask.* Mastery of enterprise-grade software architecture patterns, including Microservices, Event-Driven Architectures (Kafka, RabbitMQ), Domain-Driven Design (DDD), and GraphQL.* Deep understanding of Object-Oriented Programming (OOP) and Functional Programming principles, applying them to construct highly modular, extensible, and maintainable codebases.## II. Core Technical Proficiency & Implementation Excellence:* **Expert-level proficiency** in Python 3.x, with extensive experience in developing high-throughput, low-latency, and fault-tolerant applications leveraging its comprehensive standard library and vibrant third-party ecosystem.* Comprehensive hands-on experience with diverse database technologies, including advanced SQL optimization for relational databases (e.g., PostgreSQL, Oracle, SQL Server) and schema design for NoSQL solutions (e.g., MongoDB, Cassandra, Elasticsearch, Redis).* Architectural and implementation expertise in designing, securing (OAuth2, JWT), and optimizing RESTful and gRPC APIs, focusing on idempotency, rate limiting, and robust error handling.* **Mandatory hands-on experience** with enterprise CI/CD pipelines (e.g., Jenkins, GitLab CI, GitHub Actions, Azure DevOps) to implement fully automated testing, build, and deployment strategies (GitOps principles).* **Extensive cloud platform experience** (AWS, Azure, or GCP), encompassing infrastructure-as-code (Terraform, CloudFormation), serverless computing (AWS Lambda, Azure Functions), and a deep understanding of cloud-native services.* Proficient in containerization technologies (Docker) and advanced Kubernetes orchestration, including Helm, service meshes (Istio, Linkerd), and custom resource definitions (CRDs).* Elite-level troubleshooting, performance profiling, and optimization skills for distributed systems, leveraging tools like Prometheus, Grafana, Jaeger, and custom instrumentation.* Advocate and implement advanced automated testing strategies (unit, integration, end-to-end, performance) using frameworks like Pytest, Hypothesis, and Selenium, embracing Test-Driven Development (TDD) as a core practice.* Robust understanding and practical application of secure coding principles, static/dynamic analysis tools, and best practices for mitigating common vulnerabilities (OWASP Top 10, data encryption, secrets management with Vault).* Expertise in advanced Git workflows (Gitflow, Trunk-Based Development), including sophisticated branching, merging strategies, and pull request automation.## III. Artificial Intelligence (AI) Integration & Development:* Demonstrated experience with AI/Machine Learning lifecycle, from data preprocessing and model training to deployment and monitoring, utilizing frameworks such as TensorFlow, PyTorch, Hugging Face, and scikit-learn.* Practical experience integrating and leveraging advanced AI development tools and platforms (e.g., GitHub Copilot, Devin, Windsurf, Antigravity) to enhance developer productivity and code quality.* Hands-on experience designing, developing, and deploying **Agentic AI systems**, including the creation of custom agents, defining specialized skills, and contributing to agentic frameworks for automating complex development and operational workflows.* Strong understanding and practical application of Generative AI models (e.g., GPT, Gemini, Claude) for code generation, natural language processing (NLP) tasks, and intelligent automation within the software development pipeline.## IV. Methodology & Professional Skills:* Deep understanding and practical experience with Agile/Scrum/Kanban methodologies, fostering a collaborative, iterative, and results-oriented development environment.* Exceptional organizational skills, with the ability to dynamically re-prioritize and meticulously manage multiple high-stakes tasks in a fast-paced, evolving technical landscape.* Proven leadership in project management, including meticulous stakeholder communication, resource optimization, and cross-functional team coordination.* Superior written and verbal communication skills, capable of articulating complex technical concepts with clarity and precision to both technical and executive audiences.# Desirable Qualifications:* **Polyglot Programming Proficiency:** Experience with additional programming languages (e.g., Java, Go, Scala, Rust), particularly in the context of enterprise microservices or high-performance computing.* **Big Data & Real-time Analytics:** Hands-on experience with Big Data technologies (e.g., Apache Spark, Flink, Hadoop, Kafka Streams) and architecting real-time data processing pipelines.* **Frontend Development Expertise:** Proficiency in modern frontend frameworks (e.g., React.js, Angular, Vue.js) for full-stack application delivery.* **Cloud & Industry Certifications:** Relevant advanced cloud certifications (e.g., AWS Certified Solutions Architect - Professional, Azure Solutions Architect Expert, Google Cloud Professional Cloud Architect) or industry-recognized certifications in specialized technical domains.* **Financial Domain Acumen:** In-depth understanding of financial services industry regulations, compliance standards, and specific domain knowledge relevant to capital markets, retail banking, or enterprise risk management.------------------------------------------------------## **Job Family Group:**Technology------------------------------------------------------## **Job Family:**Applications Development------------------------------------------------------## **Time Type:**Full time------------------------------------------------------## **Most Relevant Skills**Please see the requirements listed above.------------------------------------------------------## **Other Relevant Skills**For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------*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 review* *Accessibility at Citi.* *View Citi’s EEO Policy Statement and the Know Your Rights poster.*