New

Neovest - C# Developer

TEKsystems
$80.00 - $100.00 / hr
life insurance, sick time, 401(k), retirement plan
United States, Illinois, Chicago
May 20, 2026
C# / .NET Developer (Capital Markets / Trading Systems) Location: Chicago, IL (Onsite - 5 days/week) Employment Type: Contract-to-Hire Duration: 6 months (conversion to full-time potential) Experience Level: Mid-Level Overview A leading trading technology environment is seeking a C# / .NET Developer to join a high-impact team focused on building and enhancing an advanced execution and portfolio management platform. This role supports systems used across the investment lifecycle, from portfolio construction and valuation to trade execution and analytics. You will be part of a team that works with real-time data, complex financial models, and high-performance systems designed to operate at scale within capital markets. Key Responsibilities * Develop backend applications using C#/.NET supporting trading and portfolio management systems * Build and optimize high-throughput, scalable systems handling real-time data * Design and implement multi-threaded applications to support complex calculations and processing * Work with SQL Server to manage, query, and optimize large datasets * Integrate data from external providers (e.g., market data vendors) into internal systems * Support data pipelines by ingesting, transforming, and distributing data across platforms * Contribute to system performance tuning, scalability, and stability * Participate in Agile development, including testing, CI/CD, and production support Technical Environment * Core stack: C#, .NET Framework (moving toward .NET Core), SQL Server * Real-time, event-driven systems (no batch processing) * Cloud migration environment (toward GCP) * Exposure to HTML/React components * Working within a modernizing architecture (moving away from legacy service-oriented models) Required Qualifications * 5+ years of software development experience * Strong expertise in C#, .NET, and SQL * Proven experience building multi-threaded, high-performance applications * Experience handling large-scale data systems and real-time processing * Knowledge of application scalability and system performance optimization * Experience integrating with external systems via REST, SOAP, FIX, or secure file transfer * Solid understanding of capital markets and financial instruments, including: * Equities, fixed income, derivatives (swaps, options), FX, etc. Preferred Qualifications * Experience with Execution Management Systems (EMS) or Order Management Systems (OMS) * Experience in portfolio management or valuation systems * Exposure to containerization and Kubernetes environments * Familiarity with messaging systems (Kafka, RabbitMQ) and caching technologies (Redis, Hazelcast) * Understanding of modern UI frameworks * Degree in Engineering, Computer Science, Mathematics, or related field What You'll Work On * Systems supporting trade execution and portfolio lifecycle management * Pricing and valuation models for financial instruments (e.g., swaps, bonds, derivatives) * Integration of external market data sources into internal platforms * Applications designed for speed, accuracy, and scalability in trading environments Candidates coming from: * Investment banks or financial institutions * Hedge funds or asset management firms * Fintech or trading platform environments Interview Process * 30-minute introductory interview * Technical panel interview Additional Details * Onsite role: 5 days/week in Chicago * Opportunity to convert to a permanent role * Benefits available for eligible contractors If you're interested in building high-performance systems in a fast-paced trading environment and working with real-time financial data, this is a great opportunity to make an immediate impact. Job Type & LocationThis 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 31, 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.