updated 11/26/25

About the Role

TradingBlock is seeking an outstanding Senior Software Engineer to join our team and drive the development of our core back-end trading infrastructure. If you have deep experience building high-quality, high-performance systems for trading or brokerage operations, we want to talk to you. You will play a crucial role in designing, building, and maintaining the systems that power our financial operations.

What You Will Do: Key Responsibilities

• Design, develop, and maintain robust and scalable back-end systems critical to trading and brokerage operations.

• Contribute to the architecture and implementation of low-latency, high-throughput solutions.

• Work across the full software development lifecycle, from requirements gathering and design to deployment and monitoring.

What You Will Bring: Required Qualifications

• 5+ years of professional experience in software engineering, ideally in the Financial Services or FinTech domain.

• Deep expertise in C# and the .NET framework.

• Proven experience building high-quality, transactional back-end infrastructure systems in a trading environment.

• Practical experience examples may include:

• Order Management Systems (OMS)

• Trade/Execution Engines

• Market Data Feed Handlers

• FIX Engines and Order Routing

• Position Servers, P/L, or Margin Engines

• Low Latency Design Principles

• Middleware/Messaging Queues (e.g., Kafka, RabbitMQ)

• REST APIs and Web Sockets

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Senior Software Engineer

A tech-focused online brokerage based in The Loop is currently looking for a Senior Software Engineer to work on their core trading systems. They’ve been in business for over 20 years now and are in a major growth phase.

This position focuses on the full life cycle of their proprietary trading platform, specifically across the front, middle, and back-office systems. You will be joining an established firm with a history of strong performance and a collaborative, tech-first culture.

Responsibilities

• Developing and optimizing their high-performance order routing engines.
• Designing and implementing market data processing services.
• Integrating new features and connections using the FIX Protocol.
• Collaborating with business stakeholders to translate needs into technical solutions.
• Maintaining a high standard of code quality, performance, and reliability across all trading systems.

Requirements

• Significant professional experience working as a Software Engineer, ideally on complex, high-performance systems.
• Expertise in C# development.
• Bachelor's or Master's Degree in Computer Science, Engineering, or a related field.

Pluses

• Any professional experience with C++.
• Direct experience working on low-latency trading systems, market data, or electronic brokerage platforms.
• Familiarity with financial protocols like FIX.

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