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743 c software jobs at 329 companies in Fairfield, CT

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Software Developer C/C++ (Fintech / Payments)
New York, New York, United States
$120k-$130k/yr HybridFull Time
Windcave
Windcave: Global payment technology.
5+ YOE5+ years C++ experience; legal working rights in the United States.
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Senior Software Engineer C++
New York City or Chicago
$150k-$225k/yr HybridFull Time
GTS
GTS: Electronic market maker providing liquidity to global financial markets.
7+ YOEExpert in low-latency Linux C++ trading systems with 7+ years software engineering experience; proficiency with Git, gdb, Valgrind, Python, bash; BS/MS in engineering/computing/science; strong communication skills.
C++, Linux, Git, gdb, Valgrind, Python, bash
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2w
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Senior Software Engineer, C++
Amsterdam or New York City
$185k-$225k/yr OnsiteFull Time
Flow Traders: Provides liquidity and market making across global financial markets.
5+ YOE5+ years C++ development experience, strong algorithms and multithreading skills, BSc/MSc/PhD in CS or Mathematics, experience with low-latency systems and exchange connectivity.
C++, Rust, Python, TypeScript, FIX, WebSocket, HTTP, TLS
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1w
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Software Engineer (C++/C#)
Boston or Salt Lake City or San Francisco or New York City
RemoteFull Time
Databento
Databento: Provides a pay-as-you-go financial market data platform.
5+ YOEStrong proficiency in C++ and C#, 5+ years software engineering experience preferred, experience with low-latency systems, message parsers, multithreading, and maintaining client libraries.
C++, C#, Java, lldb, gdb
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3mo
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C++ Software Engineer - Trade Capture
New York, New York, United States
$160k-$250k/yr OnsiteFull Time
Millennium Management
Millennium Management: Global alternative investment firm managing diverse investment strategies.
7+ YOEBachelor's in CS or related, 7+ years C++ Linux server-side development, real-time/event-driven and network programming experience, SQL knowledge; financial product knowledge preferred.
C++, Linux, SQL
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C++ Software Developer
Amsterdam or Chicago or London or New York City
OnsiteFull Time
Headlands Technologies
Headlands Technologies: A global proprietary trading firm utilizing quantitative algorithms.
Strong C++ ability, fundamentals of software engineering, experience building scalable distributed systems, network programming, and performance optimization; computing degree preferred or extensive professional experience.
C++, Linux
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Senior Software Engineer, Build Team (C/C++)
United States or New York City
$191k-$260k/yr HybridFull Time
nTop
nTop: Computational design software for high-performance engineering and manufacturing.
5+ YOE5+ years professional C/C++ experience (C++11/14/17), proven work in large-scale C++ codebases, deep knowledge of memory, multithreading, and performance, technical leadership, and experience working in cross-functional teams.
C, C++, C++11, C++14, C++17, Docker, Kubernetes, API, RESTful, AI/ML
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1w
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Senior Lead Software Engineering - C++ low latency
Chicago or Plano or Jersey City
$147k-$225k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
10+ YOE10+ years software engineering experience, advanced C and C++ skills, cloud-native experience, system design and operational stability expertise, experience with AI-assisted development practices.
C, C++
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Software Engineer (C#/.NET)
New York or Carlsbad
$101k-$134k/yr OnsiteFull Time
Rockstar Games
Rockstar Games: Creates and publishes world-class open-world video games.
4+ YOE4+ years in scalable distributed systems; expert in C# and/or C++; strong OO design; API design; web service scalability; MSSQL; Perforce.
Windows Server, SQL Server, IIS, .NET, C#, C++, MSSQL, Perforce, REST API, Web Services
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C++ Developer
New York, New York, United States
$175k-$250k/yr OnsiteFull Time
Atto Trading
Atto Trading: Quantitative trading firm focused on high-frequency strategies
2+ YOE2+ years in HFT platforms; strong C/C++ in Linux; profiling/optimization; OOP, multithreading, IPC; BS in CS/CE or related field
C++, Linux, Profiling tools
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1mo
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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 managing diverse financial assets.
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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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 managing diverse alternative asset classes.
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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2mo
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C# developer Pre-Trade
New York, New York, United States
$120k-$145k/yr HybridFull Time
Talan
Talan: Provides international consulting and technology transformation services.
10+ YOE10+ years software development with C#, fixed income knowledge, front-office exposure, Agile, strong communication.
C#, Jira
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3mo
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C# Developer
New York, New York, United States
$100k-$150k/yr OnsiteFull Time
Jefferies
JefferiesNYSE: JEF: Global investment banking and capital markets services provider.
3+ YOE3-5 years of C#/.NET full-stack development; SQL Server; REST/SOAP Web services; Unix/Linux scripting; OOD in .NET; hedge fund knowledge preferred.
C#, .NET, SQL Server, Web API, REST, SOAP, Unix, Linux, T-SQL, Stored Procedures, Geneva
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Senior Software Engineer (C++)
New York City or Washington or Vancouver or London or Galway or Budapest or Munich or Bengaluru or Singapore or Sydney
HybridFull Time
Diligent
Diligent: Provides software for corporate governance, risk, and compliance management.
5+ YOE5+ years building secure, scalable services in C++; experience with cloud (AWS), infrastructure as code (CDK/Terraform), containers (Docker), CI/CD, SQL/NoSQL, security practices, AI/LLM tools and mentoring peers.
C++, AWS, CDK, Terraform, Docker, CI/CD, PostgreSQL, NoSQL, Angular, LLM, IAM
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Senior Software Engineer - Office Apps C++
New York, New York, United States
$160k-$240k/yr OnsiteFull Time
Bloomberg
Bloomberg: Delivers financial data, news, and software to global markets.
4+ YOE4+ years software engineering experience with modern C++/TypeScript/JavaScript, building high-performance multi-threaded systems, strong testing and automation practices, clear communication; degree in CS/Engineering/Math or equivalent.
modern C++, TypeScript, JavaScript, Microsoft Office, Microsoft Excel, Windows, ATL, COM, Microsoft Visual Studio, WinDbg, BQL
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Senior C++ Engineer
Krakow or Hyderabad or New York City or Chicago or London or Singapore or Hong Kong or Tokyo
HybridFull Time
Pico
Pico: Provides managed infrastructure and data services to financial markets.
4+ YOEBachelor's in Computer Science/Engineering (2:1) or equivalent, 4+ years development experience, expert C++ on Linux, Python, shell scripting, makefiles, multithreading, automated testing, gdb/Valgrind, and IP networking knowledge.
C++, Python, shell scripting, makefiles, Linux, gdb, Valgrind
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1mo
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Software Engineer, Trading Systems (C++)
New York City, New York, United States
$120k-$285k/yr HybridFull Time
Tower Research Capital
Tower Research Capital: Global quantitative trading firm developing automated algorithmic strategies.
Degree in CS/Engineering/Math/Physics, strong algorithms/data-structures and distributed systems foundation, excellent C++ (Python preferred), experience building low-latency/high-performance systems, interest in financial markets.
C++, Python, Rust, Linux, FPGA
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Senior C++/Rust Developer
New York, New York, United States
$150k-$250k/yr RemoteFull Time
OpenYield
OpenYield: Automated marketplace for fixed income trading
7+ YOESeven+ years in software development; five+ years building production systems in C++ or Rust; BS in Computer Science; latency-sensitive, high-throughput systems; PostgreSQL experience; strong independence and problem-solving.
PostgreSQL, Redis, FIX Protocol, ZeroMQ, AWS
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3w
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Senior Software Engineer, C&I
United States or Brooklyn
$130k-$170k/yr RemoteFull Time
EnergyHub
EnergyHubNASDAQ: ALRM: Software platform managing distributed energy resources for utility grids.
5+ YOE5+ years software engineering experience; senior-level React and Java experience; strong full‑stack, SQL, automated testing, CI/CD, and technical project leadership skills.
React, Java, Jest, JUnit, SQL, Springboot, Maven, Python, S3, MongoDB, AWS, DBT, Snowflake
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