Lead .Net Platform Engineer – Senior Vice President

Citi

Lead .Net Developer for a global cheque payment platform focusing on microservice architecture and integrating AI into workflows. Engage in hands-on technical contributions and guide engineering standards.

Posted 6/10/2026full-timeNew Castle • 🇺🇸 United StatesSenior💰 $156,160 - $234,240 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDockerGradleJenkinsKafkaKubernetesMavenMicroservicesMongoDBNoSQLOpenShiftOracleSpringSpring BootSpringBootSQL

About the role

Key responsibilities & impact

Actively code in .Net developing reusable frameworks while performing system design, architecture reviews, and code reviews for the core cheque payment platform.
Contribute to the design of distributed, fault-tolerant, real-time systems for high-volume, low-latency transaction processing.
Write, review, and refactor production-grade code in .Net setting a high technical standard for the team.
Independently design event-driven, microservices-based architectures utilizing REST APIs, .Net.
Apply hands-on experience with Kafka, including message schema design, topic partitioning, consumer group strategies, and fault-tolerant processing.
Champion continuous development, feature flags, and progressive delivery, contributing to the design and optimization of CI/CD pipelines.
Produce and review Architecture Decision Records (ADRs) and technical design documents for key platform components.

Requirements

What you’ll need

Extensive hands-on experience in high-throughput, production-grade .Net engineering, including JVM performance tuning.
Hands-on experience building RESTful APIs with frameworks such as Spring MVC or Spring Boot.
Proven experience designing microservices ecosystems, including service decomposition, API design, inter-service communication, and cloud engineering.
Deep, hands-on expertise in Kafka, including topic design, partitioning, consumer groups, exactly-once semantics, and high-throughput stream processing.
Hands-on experience with profiling and optimization, including JVM tuning, garbage collection (GC) optimization, thread management, and memory profiling.
Practical experience designing resilience patterns such as circuit breakers, bulkheads, failover, and disaster recovery.
Hands-on expertise in Oracle (SQL) and Microsoft SQL for schema design, query optimization, and indexing, as well as MongoDB (NoSQL) for document modeling, aggregation pipelines, sharding, and replica sets.
Hands-on experience with OpenShift/AWS, Kubernetes, and Docker for container orchestration, autoscaling, and cloud-native deployment.
Experience designing and owning CI/CD pipelines aligned with enterprise-level Engineering Excellence Standards.
Experience with tools like Jenkins and Gradle/Maven.

Benefits

Comp & perks

medical, dental & vision coverage
401(k)
life, accident, and disability insurance
wellness programs
paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays

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Hard Skills & Tools

.NetREST APIsKafkamicroservicesJVM performance tuningprofiling and optimizationOracle SQLMicrosoft SQLMongoDBCI/CD pipelines

Soft Skills

system designarchitecture reviewscode reviewstechnical standard settingindependent designchampioning continuous developmentoptimizationcollaborationcommunicationleadership