Senior Software Engineer (C#)

OverviewAbout the RoleWe are hiring a Senior Staff Software Engineer to join the API & Middleware Group, a central platform team responsible for building scalable APIs, middleware services, and event-driven systems used across the organization.This role focuses on designing and operating high-performance, low-latency services that run under significant load and strict reliability requirements. You will work on distributed, data-intensive systems that enable system-to-system integration and platform-level capabilities.This role is ideal for an experienced .NET engineer who thrives on ownership, stays up to date with the newest .NET technologies, and brings deep expertise to high-load, low-latency systems.You will collaborate closely with experienced engineers, tech leads, and QA partners, contributing to architecture, implementation, and operational excellence.ResponsibilitiesPrimary Duties will includeDesign and develop low-latency solutions using the latest .NET technologies; build performant, scalable backend services from scratch or improve existing onesWrite well-designed, testable, and efficient code; ensure designs are in compliance with specificationsTackle live production challenges, including troubleshooting and performance issuesDo proof of concepts to test out various ideas and technologiesSupport continuous improvement by investigating alternatives and technologies and presenting these for architectural reviewMentor and support engineers with technical direction and best practicesParticipate in code reviews (PRs), design sessions, and agile ceremonies; contribute as a strong team playerWork closely with team leads, stakeholders, and other teams across the companyContinuously explore and evaluate new technologies that could enhance the platformTech Stack You’ll Work WithLanguages & Frameworks: C#, .NET Core, ASP.NET CoreArchitecture: Microservices, event-driven systems (Kafka, Redpanda), CQRSCloud & Infrastructure: Azure, Kubernetes, Docker, Rancher, TeamCity, Octopus, GrafanaDatabases: MS SQL Server (T-SQL), NoSQL, PostgreSQLTooling: GitHub, Visual Studio, VS Code, Rider, ReSharperAI & Developer Tools: MS Copilot, GitHub Copilot, ClaudePrimary Duties will includeDesign and develop low-latency solutions using the latest .NET technologies; build performant, scalable backend services from scratch or improve existing onesWrite well-designed, testable, and efficient code; ensure designs are in compliance with specificationsTackle live production challenges, including troubleshooting and performance issuesDo proof of concepts to test out various ideas and technologiesSupport continuous improvement by investigating alternatives and technologies and presenting these for architectural reviewMentor and support engineers with technical direction and best practicesParticipate in code reviews (PRs), design sessions, and agile ceremonies; contribute as a strong team playerWork closely with team leads, stakeholders, and other teams across the companyContinuously explore and evaluate new technologies that could enhance the platformQualificationsWhat We’re Looking ForMinimum 5+ years’ experience building global enterprise-level systemsKnowledge of financial markets or a strong desire to learnProven hands-on experience designing and developing enterprise applications using C# / .NET Core / .NET 8 or higherSolid grasp of .NET Core APIs, high-load systems, multithreading, and performance tuningExperience developing distributed systems using microservice architecture (event-based)Experience with messaging systems like Redpanda and KafkaHands-on experience with Kubernetes and containerization (Docker); experience working on cloud platforms (Azure preferred)Excellent knowledge of relational databases (SQL) and NoSQL databasesStrong communication skills and the ability to collaborate across teamsA growth mindset and eagerness to stay current with industry trendsEducationBS/MS degree in Computer Science, Engineering, or a related subjectWhat We OfferWork on mission-critical systems used globallyOwnership, and room to grow technically and personallyA strong, collaborative engineering culture with talented peersHybrid work flexibilitySupport for continued technical and professional developmentJob SummaryCategory (Portal Searching): Information TechnologyPosition Type (Portal Searching): Experienced Professional