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832 c developer jobs at 330 companies in Illinois

2w
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Principal C Engineer
Hyderabad or New York City or Chicago or London or Singapore or Tokyo or Hong Kong
HybridFull Time
Pico
Pico: Private financial-markets technology providing trading infrastructure, connectivity, market data, software, and analytics to institutions.
10+ YOEBSc/MSc in relevant engineering, 10+ years' relevant experience including 5+ in electronic trading, strong C on Linux, capital markets and FIX knowledge, high-performance and multithreaded systems, testing and Jenkins.
C, Linux, FIX, Jenkins, gdb, valgrind, Python, Java, Wireshark
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2mo
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Junior C++ Developer
Chicago or London or New York
$150k-$200k/yr OnsiteFull Time
Balyasny Asset Management
Balyasny Asset Management: Global multi-strategy investment firm.
Strong foundation in algorithms, data structures, distributed systems, and software design; proficiency in low-level C++; familiarity with automated testing and CI/CD; strong communication and collaboration skills.
C++, CI/CD
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2mo
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Junior C++ Developer
New York or Chicago or London
$150k-$200k/yr OnsiteFull Time
Balyasny Asset Management
Balyasny Asset Management: Global multi-strategy investment firm.
Strong foundation in algorithms, data structures, distributed systems, and software design; desire to learn low-level C++; familiarity with automated testing and CI/CD; excellent communication skills.
C++, CI/CD, Order Management System (OMS)
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1d
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.Net/C# Developer
Manhattan or United States or California or Colorado or Illinois or Minnesota or New Jersey or New York or Oregon or Washington
$85k-$117k/yr RemoteFull Time
Syms Strategic Group
Syms Strategic Group: Service-disabled veteran-owned small business providing professional and IT services to the U.S. federal sector.
8+ YOERequires 8+ years of .NET or C# development, bachelor's degree or equivalent, U.S. citizenship, Public Trust (MBI) eligibility, AWS, SQL, Git, Jira, containerization, and DevOps experience.
Microsoft .NET, C#, SQL, AWS, Jira, Git, Containerization, DevOps, Electronic Data Interchange X.12 (EDI), T-SQL, Microsoft Teams, LinkedIn
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2w
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C++ Developer Intern
Chicago, Illinois, United States
$84k/yr OnsiteInternship
SCALP Trade
SCALP Trade: Edge driven by logic, technology, and speed.
0+ YOEC++ fundamentals, STL, memory management, move semantics, templates, data structures, algorithms, threading, Linux, and command-line tools. Strong communication and analytical skills required; projects or coursework demonstrate readiness.
C++, STL, Linux, Python, C#, SQL, Git, gdb, valgrind, perf, flamegraph
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1mo
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Senior Software Engineer, C++ | Patching
United States or California or Colorado or Connecticut or Florida or Georgia or Illinois or Kansas or Massachusetts or Maryland or Maine or New Jersey or North Carolina or New York or Oregon or Tennessee or Texas or Virginia or Washington or Austin or Tampa or Chicago
HybridFull Time
NinjaOne
NinjaOne: Privately held NinjaOne provides endpoint management, patching, backup, and remote access software for IT teams and MSPs.
7+ YOEBachelor’s degree in a technical field and 7+ years of C++ development experience. Requires modern C++, cross-platform Windows/macOS/Linux development, Win32 API, POSIX, gRPC, Protocol Buffers, SQLite, and CMake.
C++, C++17, Windows, macOS, Linux, Win32 API, POSIX, gRPC, Protocol Buffers, SQLite, CMake, Qt, Vcpkg, Java, Kotlin, Golang, Postgres, AWS
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2w
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C++ Software Engineer, Trading Platform
Chicago, Illinois, United States
$100k-$140k/yr OnsiteFull Time
Wolverine Execution Services
Wolverine Execution Services: A financial technology firm developing software for global electronic trading.
2+ YOEBachelor's degree in computer science, computer engineering, or equivalent experience; 2+ years of software development experience; C++ experience; algorithms, data structures, and concurrent programming knowledge.
C++
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C#/.NET Developer (Application & Database Development)
Chicago, Illinois, United States
HybridContract
FDM Group
FDM GroupLSE: FDM: Global professional services firm training and deploying consultants.
5+ YOE5+ years software development experience; bachelor's degree in CS/Engineering/Information Systems; strong C#, .NET, ASP.NET, SQL Server, T-SQL, EMR skills; Git and Azure DevOps experience; strong analytical and communication skills.
C#, .NET Framework, .NET Core, .NET 8+, ASP.NET MVC, ASP.NET Core, SQL Server, T-SQL, Entity Framework, Azure, SSIS, SSRS, Power BI, Azure DevOps, Docker, Visual Studio, Git, SQL Server Management Studio (SSMS), Jira
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1mo
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Graduate C++ Developer (2027 Incoming Graduate, Full-Time)
Chicago, Illinois, United States
$125k-$200k/yr OnsiteFull Time
3Red Partners
3Red Partners: Bridges technology and trading.
1+ YOEStudent graduating in 2027 with CS/Engineering degree, 1+ C++ internship experience, knowledge of low-latency systems, STL, Boost, Linux, git, and strong problem-solving and communication skills.
C++, STL, Boost, Linux, git
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Senior Software Engineer, C++
Amsterdam or New York City or Chicago
$185k-$225k/yr OnsiteFull Time
Flow Traders
Flow TradersEuronext Amsterdam: FLOW: Public market maker and proprietary trading firm providing liquidity across ETPs, FX, commodities and digital assets.
5+ YOE5+ years C++ development experience, strong algorithms and multithreading knowledge, interest in high-performance systems, and good communication skills.
C++, Rust, Python, TypeScript, FIX, WebSocket, HTTP, TLS
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2mo
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Sr. Substation P&C Engineer
Los Angeles or United States or Warrenville or Houston or Denver or Moscow
RemoteFull Time
ENTRUST Solutions Group
ENTRUST Solutions Group: Engineering, consulting, and automation services for critical infrastructure.
5+ YOEBachelor's in Electrical Engineering, 5+ years substation P&C engineering experience, hands-on with relay protection (SEL, GE, Siemens, ABB), knowledge of NERC/PRC/IEEE/NEC, utilities/EPC/consulting experience; PE preferred.
SEL, GE, Siemens, ABB, AutoCAD, MicroStation, Bluebeam, SCADA
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2w
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Senior Software Engineer, Trading Platform, C++
Chicago, Illinois, United States
$175k-$240k/yr OnsiteFull Time
DRW
DRW: Global proprietary trading firm investing across diverse asset classes.
5+ YOERequires 5+ years developing high-availability C++ systems under tight latency constraints, multithreaded programming, performance tuning, Linux, socket I/O, STL, Boost, C++23, and strong English communication.
C++, Linux, STL, Boost, C++23
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1mo
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Software Engineer (C++ or Python) – 2027 Grads
Austin or Chicago or London or New York City or Singapore
$300k/yr OnsiteFull Time
Hudson River Trading
Hudson River Trading: Private quantitative trading firm providing liquidity across global markets and directly to financial-market clients.
Full-time undergraduate or master's student in computer science or a related field, eligible for 2027 full-time roles, with C/C++ or Python experience and strong design, debugging, problem-solving, and computer science fundamentals.
C, C++, Python, UNIX, Linux
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1w
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Engineer, Electrical I&C
Warrenville or Braceville
$93k-$154k/yr HybridFull Time
Constellation Energy Generation, LLC
Constellation Energy Generation, LLC: Private U.S. power generator and energy supplier serving wholesale, retail, commercial, public-sector, and residential customers.
2+ YOEBachelor's degree in engineering and 2 years of nuclear or related engineering experience for mid-level, or 5 years for senior level; must meet applicable plant access and medical requirements.
SCADA
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2mo
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Senior Software Engineer C++
New York or Chicago
$150k-$225k/yr HybridFull Time
GTS
GTS: Private American electronic market-making firm trading equities, ETFs, fixed income, futures, and foreign exchange for financial institutions.
7+ YOEExpertise in Linux C++ low-latency systems, 7+ years software engineering, BS/MS in engineering/computing/science, Git, gdb, valgrind, Python/bash, networking knowledge.
Linux, C++, Git, gdb, valgrind, Python, bash
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3w
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C++ Software Engineer (DV Commodities - Chicago)
New York or London or Chicago
$180k-$250k/yr OnsiteFull Time
DV Commodities
DV Commodities: Proprietary commodities trading division providing liquidity and risk management to counterparties across energy, agricultural, soft, and metal markets.
7+ YOE7+ years C++ development experience, low-latency trading systems, exchange connectivity knowledge, Linux and networking proficiency, Python/NumPy/pandas familiarity, strong communication and judgment.
C++, C++17, C++20, iLink 3, MDP 3.0, FIX, SBE, Linux, git, Python, NumPy, pandas, Onload, VMA, DPDK, TCP, UDP, SQL, NoSQL
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3w
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Senior I&C Engineer, Water/Wastewater
Chicago or New York City
$108k-$162k/yr HybridFull Time
TYLin
TYLin: Full-service infrastructure consulting and engineering firm.
10+ YOEPE required; BS in Electrical or Mechanical Engineering and 10–15 years of relevant industrial engineering consulting or controls integration experience. Water/wastewater experience preferred.
SCADA, HMI, PLC, DCS, Rockwell, Siemens, Modicon, General Electric, WonderWare, IFIX, RS View, Intellution, P&ID
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14h
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C++ Engineering Lead – Delta Force
Chicago or New York
$225k-$250k/yr HybridFull Time
Chicago Trading Company
Chicago Trading Company: Private proprietary trading firm specializing in options market making and systematic strategies across global derivatives markets.
5+ YOERequires 5+ years of production experience with modern C++, large-scale systems, low-level programming, optimization, architecture, networking, multithreaded and distributed systems, and project management.
C++
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Software Engineer (Entry-Level) - C++
Chicago, Illinois, United States
$145k/yr OnsiteFull Time
Akuna Capital
Akuna Capital: Proprietary trading firm providing options-market liquidity through advanced technology, strategic trading, and quantitative research.
Pursuing a technical bachelor's/master's/PhD (graduating by Aug 2027), experience with modern C++, familiarity with distributed/asynchronous systems, debugging and profiling tools, strong problem solving and communication skills.
C++, Python, Shell, perf, gprof, vtune, GDB, Valgrind, AddressSanitizer
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1mo
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Software Engineer (C++ or Python) – 2027 Grads
New York City or London or Singapore or Austin or Chicago
$300k/yr OnsiteFull Time
Hudson River Trading
Hudson River Trading: Private quantitative trading firm providing liquidity across global markets and directly to financial-market clients.
BS/MS in CS or related; proficient in C/C++ or Python, strong CS fundamentals, Linux/UNIX knowledge, excellent debugging and problem-solving, eligible for full-time roles in 2027.
C/C++, Python, UNIX, Linux
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