Sr. Software Engineer (C# & ASP.NET)

Job Description

Senior Software Engineer | Direct Hire | Chicago, IL (Hybrid) | Investment Management

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We are partnering with a Chicago-based client seeking a Senior Software Engineer who is passionate about software design, object-oriented architecture, and domain modeling. This role focuses on solving complex business problems, working with sophisticated data models, designing elegant software abstractions, and delivering scalable, intuitive APIs.

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Success in this role requires more than technical expertise. The ideal candidate will be intellectually curious, challenge assumptions, and develop a deep understanding of the investment business, data ecosystem, and foundational platforms that support enterprise applications.

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Location & Employment Requirements

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• Hybrid schedule: 3 days per week in the Chicago office
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• Direct hire opportunity
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• Candidates must currently reside in the Greater Chicago area
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• No visa sponsorship or transfer available now or in the future
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• No C2C or third-party candidates
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Key Responsibilities

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• Design and develop foundational services and APIs that provide access to investment, financial, operational, and reference data across the enterprise.
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• Translate complex business concepts and data relationships into robust domain models, object-oriented designs, and reusable services.
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• Build scalable, high-performing APIs that simplify access to complex underlying systems and data.
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• Develop expertise in investments, funds, ownership structures, valuations, cash flows, accounting, and investment performance.
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• Make architectural decisions involving service design, API contracts, data access, caching, messaging, and distributed systems.
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• Simplify platform complexity, improve abstractions, and establish reusable engineering patterns.
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• Contribute to architecture discussions, code reviews, mentoring, and engineering best practices.
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Qualifications

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• 7+ years of professional software engineering experience building and supporting complex production systems.
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• Strong experience with C#, .NET, and ASP.NET Core.
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• Deep understanding of object-oriented design, domain-driven thinking, and software architecture.
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• Proven experience designing and building RESTful APIs and service-oriented applications.
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• Strong SQL and relational database skills, including complex data modeling and query development.
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• Experience building software that bridges enterprise data platforms and downstream applications.
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• Ability to partner with business stakeholders and translate ambiguous requirements into well-designed solutions.
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• Collaborative mindset with strong communication, mentoring, and problem-solving skills.
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Preferred Experience

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• Financial services, asset management, investment management, or private markets.
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• Familiarity with investment data, including funds, portfolios, transactions, valuations, accounting, cash flows, and performance metrics.
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• Experience building enterprise platforms or shared services used across multiple applications and teams.
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• Knowledge of enterprise data platforms, data warehousing, messaging/event-driven architectures, CQRS, distributed systems, and performance optimization.
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Core Technologies

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C#, .NET, ASP.NET Core, REST APIs, SQL Server, Relational Data Modeling, Enterprise Data Platforms, Data Warehousing, Messaging, Event-Driven Architecture, CQRS, Distributed Systems, Caching, and Performance Optimization.

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