Lead Application Developer (.Net with Java), Mumbai

The Role: S&P Dow Jones Indices a global leader in providing investable and benchmark indices to the financial markets, is looking for a Lead Application Developer to join our technology team. The Team: You will be part of global technology team comprising of Dev, QA and BA teams and will be responsible for analysis, design, development and testing.The Impact: You will be working on one of the core technology platforms responsible for index calculations as well as dissemination of index values What's in it for you: You will have the opportunity to work on the enhancements to the existing index calculation system as well as implement new methodologies as requiredResponsibilities: Technical leadership&delivery ownership Own end-to-end technical execution for modernization and migration initiatives (scope, design, implementation, quality, and delivery milestones). Modernization strategy (from .NET MVC to cloud-native) Assess current .NET/C#/MVC applications (dependencies, coupling, data access patterns, hosting, performance bottlenecks, security gaps).Define modernization approach per capability: rehost/refactor/re-architect/replace , prioritizing quick wins and risk reduction. AWS cloud-native implementation Design and guide build-out of cloud foundations required for modern apps (networking, environments, security, observability, CI/CD). Ensure production readiness: performance testing strategy, failure-mode testing, rollout/rollback procedures.Migration to existing AWS/Java (Spring/Hibernate) platforms Lead functional migration from .NET codepaths to Java-based services while maintaining correctness and availability. Define interoperability approach during transition (API contracts, adapters, strangler pattern, feature toggles, compatibility layers).Partner with platform owners to ensure migrated components comply with existing Java platform conventions and deployment pipelines. Engineering excellence&SDLC Set standards for clean code, code reviews, test automation, branching/release strategy , and environment promotion. Drive test strategy across stacks: unit, contract, integration, regression, and end-to-end tests; improve automation coverage. Improve build/release reliability; reduce cycle time; implement guardrails (quality gates, vulnerability scanning as applicable).Security, compliance, and risk management Embed secure engineering practices (threat modelling participation, secure coding standards, dependency hygiene). Ensure appropriate handling of secrets/credentials, least-privilege access, and auditability. Identify technical risks early (data migration risk, downtime, coupling, unknown dependencies) and drive mitigation plans.Team mentorship&upskilling (explicit people mandate) Create an upskilling plan for the existing team: learning paths for AWS fundamentals, Java/Spring, cloud-native patterns, and DevOps practices. Stakeholder collaboration Partner with product/business stakeholders to prioritize modernization deliverables and manage trade-offs (time, scope, risk).Coordinate with security, infrastructure/platform, and data teams to remove blockers and align on shared standards. What We're Looking For: Basic Qualification : Bachelor's degree in Computer Science, Information Systems or Engineering is required, or in lieu, a demonstrated equivalence in work experience.(10 to 12) years of IT experience in application development and support. Strong Experience with Java, J2EE, JMS including Spring Framework Strong experience with Microsoft .Net C# Strong experience with Microsoft .Net C# MVC web applications Strong Experience with Advanced SQL, T-SQL, PL/SQL programmingBasic networking knowledge / Unix scripting Minimum 1-2 years of experience in minimum three of following. Advanced Python Advanced Scala Infrastructure/ CICD/DevOps Big data / AWS Cloud / Micro services Spark using scala / python/java and HDFS Good understanding of AWS cloud (EC2, EMR, Lambda, S3, Glue, etc.)Ansible / Fortify / Jenkins QA Automation (cucumber , selenium , karate etc) Exposure to addressing Vulnerabilities Preferred Qualification : Experience working with large datasets in Equity, Commodities, Forex, Futures and Options asset classes. Experience with Index/Benchmarks or Asset Management or Trading platforms.Basic Knowledge of User Interface design&development using JQuery, HTML5&CSS.