Senior Software Engineer – Python & Cloud

We are #BrilliantTogether! ISS STOXX is growing! We are seeking an experienced and qualified Senior Software Engineer – Python & Cloud to join our dynamic team in Gurgaon. Overview: The ICOS ( Index Configuration and Operation System) Development team within our Index business is responsible for the application development and maintenance of key components of the index calculation platform. The ideal candidate will bring deep expertise in Python development, hands-on experience with Google Cloud Platform (GCP), and a strong understanding of serverless architecture patterns. While familiarity with Oracle PL/SQL is beneficial, the primary focus of this role is designing and building scalable, cloud-native solutions using Python within a modern data and application ecosystem. You will strengthen the ICOS Development team by designing and implementing serverless, event-driven, and microservices-based architectures on GCP. This includes developing and maintaining cloud-native applications, data processing pipelines, and APIs using services such as Cloud Functions, Cloud Run, BigQuery, Pub/Sub, and Cloud Storage. You will play a key role in evolving system and data architecture within a complex business process and data warehouse environment, ensuring solutions are scalable, resilient, and cost-efficient. Responsibilities: Designing and developing Python-based services and FastAPI-driven APIs in a GCP environment Building and maintaining serverless applications and event-driven integrations Implementing and optimizing data architectures leveraging BigQuery and other managed GCP services Contributing to CI/CD pipelines and infrastructure-as-code practices Implementation of complex business rules and index concepts Mentor and coach team members in Python best practices, cloud-native design on GCP, and serverless architecture patterns, fostering high code quality and scalable solution design Maintenance and design of a complex & challenging data warehouse environment Technical design documentation Design and execution of test strategies Provide 1st line/2nd line application support primarily for the ICOS systems Qualifications: Python mastery: Deep understanding of design patterns, OOP, and Pythonic code FastAPI expertise: 4+ years building high-performance APIs Data processing: Expert-level Pandas, Polars, NumPy and optimization techniques for large datasets Cloud platforms: Hands-on with GCP (preferred), AWS, or Azure including containerization, Cloud functions/serverless compute Database proficiency: Excellent Oracle PLSQL and RDBMS experience (Oracle) Scheduling: Experience with Control-M or other scheduling tools ETL knowledge : Exposure with Informatica Powercenter Business domain : Indexing knowledge beneficial Deployment : Experience with CI/CD pipelines and infrastructure as code (Terraform) A high motivation to support and operate a complex & challenging data warehouse environment Excellent analytical skills Proficiency in written and spoken English Additionally, you need to be a team player with good communication skills, highly motivated, flexible and show willingness to learn and adopt new technologies quickly. #ENGINEERING #MIDSENIOR #LI-AS1 What You Can Expect from Us Our people are the moving force behind our work. We are committed to building a culture that values diverse skills, perspectives, and experiences. If you have the skills, passion, and drive to help us bring clarity and transparency to capital markets, we want to work with you. Together, we can grow your career in an environment that fuels creativity, drives innovation, and has real impact. About ISS STOXX ISS STOXX delivers world-class research, data, and technology solutions that empower capital market participants to pursue their visions with confidence. Our expertise spans indices, corporate governance, sustainability, cyber risk, and fund intelligence, giving clients the tools they need to uncover opportunities, manage risks, and navigate evolving regulations. We are made up of 4,000 professionals operating across 20 countries and serving approximately 5,000 clients, including many of the world’s leading institutional investors. Our scale and reach give us deep market knowledge, while our innovative methodologies allow us to offer our clients tailored insights that drive impact and success. ISS STOXX Indices , including the renowned STOXX and DAX families, sets the standard for rules-based, transparent, and liquid benchmarks and indices. Our ready-made products and customized solutions are used by sophisticated institutional investors, ETF issuers, and providers of derivatives and structured products. Visit our website: View additional open roles: ISS STOXX is committed to fostering, cultivating, and preserving a culture of diversity and inclusion. It is our policy to prohibit discrimination or harassment against any applicant or employee on the basis of race, color, ethnicity, creed, religion, sex, age, height, weight, citizenship status, national origin, social origin, sexual orientation, gender identity or gender expression, pregnancy status, marital status, familial status, mental or physical disability, veteran status, military service or status, genetic information, or any other characteristic protected by law (referred to as “protected status”). All activities including, but not limited to, recruiting and hiring, recruitment advertising, promotions, performance appraisals, training, job assignments, compensation, demotions, transfers, terminations (including layoffs), benefits, and other terms, conditions, and privileges of employment, are and will be administered on a non-discriminatory basis, consistent with all applicable federal, state, and local requirements.