Top C++ Jobs in Chicago, IL

Ten-week paid software engineering internship developing, testing, and deploying C++ solutions for a proprietary trading platform. Interns work with large datasets, network programming, multithreaded applications, AI coding tools, and cross-functional technologists and researchers. The role includes mentorship, complex problem-solving, collaboration, and opportunities for full-time employment after graduation.

Develop and test high-performance C++ applications for trading platforms. Collaborate with traders and senior engineers to translate requirements into efficient solutions, while monitoring, profiling, troubleshooting, and improving system reliability. Gain hands-on experience across the full trading-system development lifecycle in an on-site, highly collaborative environment.

Design, develop, and maintain high-performance C++ trading platform applications. Partner with traders and quantitative researchers to translate business needs into efficient technical solutions. Lead profiling, performance optimization, testing, code review, and release improvements while owning features from design through production support.

Build and optimize low-latency C++ systems for market data processing, exchange connectivity, and order execution. Analyze performance across application, memory, CPU, networking, and operating-system layers. Collaborate with traders, FPGA engineers, and infrastructure teams, while owning production systems through design, testing, deployment, and real-time support.

Build software, data pipelines, dashboards, and automation for cloud cost visibility, infrastructure efficiency, reliability, engineering productivity, and financial accountability. Analyze workloads and billing data, implement AI- and analytics-enabled forecasting and anomaly detection, develop cloud-native services, and support capacity planning, cost allocation, and optimization. Collaborate with Engineering, Finance, Data, Platform, SRE, Architecture, and Product teams while testing, troubleshooting, documenting, and communicating recommendations and business value.

Design and develop scalable C++ software for endpoint state and control across Windows, macOS, and potentially Linux. Build reliable, multi-process systems that enforce endpoint behavior, manage local state, support IPC, and operate across millions of devices. Responsibilities include implementing features, improving platform performance, writing design documents, defining architecture and IPC contracts, and making technical decisions in an evolving, sparsely documented environment.

Develop and test systems-level C++ software that defines and enforces endpoint behavior. Initially, the engineer will own testing infrastructure and coverage for two active projects, then contribute to feature development. The role requires strong C++ fundamentals, automated testing experience, and interest in operating-system concepts such as processes, file systems, services, and APIs. Work includes learning unfamiliar systems, collaborating effectively, and supporting reliable endpoint security and management capabilities.

Develop and architect a cross-platform C++ endpoint patching agent for Windows, macOS, and Linux. Responsibilities include code reviews, mentoring engineers, improving development processes, collaborating across patching teams, and translating product needs into resilient technical designs. The role involves system-level APIs, patch installation and rollback logic, embedded databases, and client-server integration.

Design, customize, and maintain C++ applications in a Linux environment. Lead releases, collaborate with stakeholders and QA, mentor junior engineers, manage documentation, track performance metrics, and participate in design and peer-programming sessions. May work variable schedules including nights and weekends.

Design, build, and maintain data pipelines, datasets, APIs, storage systems, and research infrastructure supporting quantitative trading. Develop big data tooling for cluster and high-throughput computing, improve scalability and performance, manage data transmission between C++ and Python, and support releases, debugging, maintenance, and storage expansion. The role also involves leading technical projects and mentoring junior engineers.

Develop and enhance performance-critical C++ applications for ultra-low latency trading systems, collaborating across teams to analyze and optimize performance.

Leads and develops a software engineering team while contributing hands-on to enterprise application design, coding, testing, code reviews, production support, and technical decisions. Builds scalable solutions using C#, ASP.NET, SQL Server, and modern web technologies; partners with product and business stakeholders; supports Agile delivery, CI/CD, troubleshooting, root cause analysis, and engineering best practices. The role also includes mentoring engineers, monitoring delivery and operational metrics, and driving continuous improvement.

Join an on-site Chicago team building high-performance C++ trading systems. Contribute to design, development, testing, profiling, and troubleshooting. Collaborate with traders and senior engineers, receive mentorship, and gain exposure to the full lifecycle of low-latency trading platform development.

Join an on-site Chicago team building high-performance C++ trading systems. Design, develop, test, profile, and troubleshoot low-latency applications while collaborating with traders and senior engineers. Receive mentorship, training on markets, and exposure to production lifecycle and performance tuning.

Design, implement, and maintain C++ components for a global electronic trading platform. Collaborate on system design, perform code reviews, troubleshoot production issues, and improve system stability while participating across the software development lifecycle.

Design, develop, and support high-performance C++ and Python back-office post-trade processing applications. Build scalable reconciliation workflows, optimize SQL and database performance, implement monitoring and automated testing, troubleshoot production issues, and contribute to architecture and code reviews. Collaborate with technical and business stakeholders, use AI-assisted development tools, mentor junior engineers, and support reliable financial systems.

Design and develop low latency, high-performance trading systems. Optimize code and solutions for hardware efficiency, ensuring seamless application integration.

Design, develop, and field high-performance Ground Control Station and C2 software using C++/Qt/QML and QGroundControl. Lead architecture and technical direction, mentor engineers, define APIs/ICDs, debug integration/latency issues, support field tests, implement post-mission debrief tools, and ensure interoperability with C2 standards.

Develop and modernize enterprise applications using C#/.NET and PostgreSQL, including refactoring a Microsoft Access/VBA application. Responsibilities include writing maintainable code, participating in code reviews, testing, documentation, deployment, and collaborating with the software development team in a fully remote environment.

Design, implement, and support low-latency exchange connectivity components including market data handlers, order gateways, and reference data processors. Build APIs (REST/WebSocket/event bus), collaborate with OMS/FCM/infrastructure teams, and optimize for high throughput, fault tolerance, and observability in production trading systems.

Lead modernization of a 30-year-old Store Management System by reverse engineering EZC file-based platforms, migrating data and applications to PostgreSQL, and developing enterprise C/C++ software. Responsibilities include architecture, systems integration, APIs, ETL, performance optimization, troubleshooting, documentation, and maintaining business continuity. The role also applies AI-assisted development tools for code analysis, documentation, testing, and modernization while mentoring teams and supporting legacy and modern environments.

Design, implement, operate, and optimize ultra-low-latency electronic trading systems on Linux. Responsibilities include building distributed real-time systems, analyzing packet captures and core dumps, troubleshooting performance, using profiling and benchmarking tools, and optimizing networking, concurrency, throughput, and reliability. The role spans architecture through live production debugging and involves collaboration with developers, traders, and operations teams.

Develop, test, debug, integrate, and maintain secure Navy logistics and supply chain applications. Design databases, APIs, system interfaces, and scalable web solutions using C#, ASP.NET, MVC, SQL Server, JavaScript, and REST services. Perform testing, defect resolution, code reviews, configuration management, deployments, troubleshooting, documentation, and customer support within an Agile environment.

Build and validate reinforcement-learning tasks for AI agents exploring unfamiliar C repositories. Responsibilities include investigating runtime behavior, rewriting engineering questions, refining rubrics and foils, running validation workflows, documenting solutions, and addressing expert review. Work focuses on production systems such as PostgreSQL, Redis, OpenSSH, OpenSSL, and other foundational C codebases.

Leads hands-on full-stack development across architecture, implementation, testing, deployment, and support. Designs secure, scalable C#/.NET and Angular applications, cloud integrations, APIs, and data solutions on AWS. Guides developers, establishes engineering standards, manages CI/CD and automated testing, troubleshoots complex issues, and drives cloud optimization, security, and technical debt reduction. Collaborates with product, architecture, DevOps, analytics, and project teams while supporting migration of on-premises applications to AWS.