.Net Web API Developer

Oppenheimer & Co. Inc.; New York (NY); On-site; USD 110,000 - 130,000; Full time

Job summary

A leading investment bank is seeking an experienced .NET Web API Developer to join their New York team. The role involves designing and maintaining server-side logic and APIs for financial applications, working with databases like Sybase and SQL Server, and collaborating with front-end and database teams. The ideal candidate has over 5 years of .NET web development experience and a strong background in database management. Competitive salary range is $110,000 - $130,000, with additional compensation potential.

Qualifications

• Minimum of 5+ years of professional experience in .NET web development.
• Proven experience managing Sybase databases.
• Extensive experience with SQL Server design and performance tuning.

Responsibilities

• Design, develop, and maintain .NET Web APIs using C#.
• Collaborate with teams to define and ship new features.
• Implement testing to ensure application stability.

Skills

C#

.NET Web API

SQL Server

Sybase

MongoDB

JavaScript

Angular

React

Tools

Git

Azure DevOps Server

Job description

Join to apply for the .Net Web API Developer role at Oppenheimer & Co. Inc.

Who We Are

Oppenheimer & Co. Inc. (“Oppenheimer”) is a leading middle‑market investment bank and full‑service broker‑dealer. With roots tracing back to 1881, the Company is engaged in a broad range of activities in the financial services industry, including retail securities brokerage, institutional sales and trading, investment banking (both corporate and public finance), equity & fixed income research, market making, trust services and investment advisory and asset management services.

Job Description

Oppenheimer & Co. Inc. is seeking a .NET Web API Developer to join our IT team in our New York office. This individual will design, develop, test, and maintain server‑side logic and APIs for our suite of financial applications. They will collaborate with front‑end developers, database administrators, and business analysts to translate business requirements into efficient, secure, and reliable software solutions. The role involves enhancing existing systems, developing new features, and ensuring seamless integration between various platforms. Expertise in managing Sybase, SQL Server, and MongoDB databases is crucial.

Responsibilities

• Design, develop, and maintain high-performance and scalable .NET Web APIs using C# and the .NET Framework/.NET Core
• Collaborate with cross‑functional teams to define, design, and ship new features for financial applications
• Develop robust data access layers and integrate APIs with multiple database systems, including Sybase, SQL Server, and MongoDB
• Write clean, maintainable, and efficient code following best practices and established coding standards
• Implement unit testing, integration testing, and performance testing to ensure code quality and application stability
• Troubleshoot, debug, and resolve software defects and production issues in a timely manner
• Participate in code reviews to maintain code quality, share knowledge, and ensure compliance with project standards
• Manage API versioning, documentation (e.g., using Swagger/OpenAPI), and deployment processes
• Stay up-to-date with emerging technologies and industry trends to continuously improve development practices and application performance
• Apply specific knowledge of financial systems and business processes to improve application functionality and reliability

Skills / Requirements

Experience:

• Minimum of 5+ years of professional experience in .NET web development, specifically with .NET Web API, C#, and the .NET Framework/.NET Core
• Proven experience working with and managing data in Sybase databases (Sybase ASE/IQ), preferred
• Extensive experience with SQL Server database design, T‑SQL programming, and performance tuning
• Hands‑on experience with MongoDB (or other NoSQL databases), including data modeling and query optimization
• Experience with front‑end technologies (e.g., JavaScript, Angular/React) is a plus

Technical Skills

• Proficiency in building RESTful APIs and microservices architecture
• Strong understanding of object‑oriented programming (OOP) principles and design patterns
• Experience with version control systems, preferably Git and Azure DevOps Server

Soft Skills

• Strong analytical and problem‑solving skills
• Excellent communication and collaboration abilities
• Ability to work independently and as part of a team in a fast‑paced environment
• Detail‑oriented and committed to producing high‑quality work

Preferred Qualification

• Prior experience in the finance industry or working on financial software applications

Compensation

For job postings in New York City, Oppenheimer is required by law to include a reasonable estimate of the salary range for this role. This salary range is specific to the City of New York and takes into account the wide range of factors that are considered in making salary decisions including but not limited to your skills, qualifications, experience, licensure and certifications, and other business and organizational needs. A reasonable estimate of the current base salary range is $110,000.00 - $130,000.00 at the time of this posting. Also, certain positions are eligible for additional forms of compensation such as discretionary bonus.

Seniority level: Mid‑Senior level

Employment type: Full‑time

Job function: Engineering and Information Technology