New

C# Developer (W/ Capital Markets Experience) (W2 Only / No C2C)

TEKsystems
$80.00 - $100.00 / hr
life insurance, sick time, 401(k), retirement plan
United States, Illinois, Chicago
May 14, 2026
Description Must have knowledge of capital markets: Role/Experience Expectations Building and extending apps through throughput and scalability Know how to build apps to containerize in Kubernetes environment Multithreading in C#, thread safety Scalability Prior experience with execution management systems (EMS) or order management systems (OMS) is preferred Formal Description: Formal training or certification in software engineering concepts and 5+ years of applied experience. Experience with and fundamental knowledge of financial products traded in capital markets (e.g., Equities, Futures, Options, Bonds, Swaps, FX). Advanced knowledge and experience with C#/.Net. Advanced knowledge and experience in developing multi-threaded applications. Experience building middle-tier services at scale. Experience developing software that integrates with third-party, external providers using REST, SOAP, FIX, and secure file transfer. Hands-on practical experience in delivering system design, application development, testing, and operational stability. Advanced understanding of agile methodologies such as CI/CD, Application Resiliency, and Security. Demonstrated proficiency in software applications and technical processes within a technical discipline (e.g., cloud, artificial intelligence, machine learning, mobile, etc.). In-depth knowledge of the markets and trading industry and their IT systems. Practical cloud-native experience. Preferred Qualifications, Capabilities, and Skills: Experience working with Portfolio Management systems. Ability to work in an Agile environment. Understanding of modern User Interface architecture and design. Understanding and experience with data caching technologies (e.g., Redis, Hazelcast). Understanding and experience with message distribution technologies (e.g., RabbitMQ, Kafka). Advanced English language skills. Job Type & Location This is a Contract to Hire position based out of Chicago, IL. Pay and BenefitsThe pay range for this position is $80.00 - $100.00/hr. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: * Medical, dental & vision * Critical Illness, Accident, and Hospital * 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available * Life Insurance (Voluntary Life & AD&D for the employee and dependents) * Short and long-term disability * Health Spending Account (HSA) * Transportation benefits * Employee Assistance Program * Time Off/Leave (PTO, Vacation or Sick Leave) Workplace TypeThis is a fully onsite position in Chicago,IL. Application DeadlineThis position is anticipated to close on May 27, 2026. About TEKsystems We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. About TEKsystems and TEKsystems Global Services We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records. Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.