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C Unix Developer Jobs in Illinois (NOW HIRING)

DomainTools

Senior Software Engineer

Chicago, IL

$126K - $166K/yr

... Unix environments. * Excellent written and verbal communication skills. * Proven ability to ... Bash, Scala, C, or Hive development experience * Experience with full stack development Benefits ...

Domaintools

Senior Software Engineer

Chicago, IL · On-site

$140 - $190/hr

... Unix environments. * Excellent written and verbal communication skills. * Proven ability to ... Bash, Scala, C, or Hive development experience * Experience with full stack development DomainTools ...

Motorola

Testing Engineer

Chicago, IL · On-site

$65K - $100K/yr

Department Overview Test Systems Engineering: Designs, builds, and deploys test solutions into our ... Familiarity with UNIX, C & C++ * Ability to work with minimum supervision preferred. Candidates ...

Motorola Solutions, Inc.

Testing Engineer

Chicago, IL · On-site

$65K - $100K/yr

Department Overview Test Systems Engineering: Designs, builds, and deploys test solutions into our ... Familiarity with UNIX, C & C++ * Ability to work with minimum supervision preferred. Candidates ...

Tachyon Technologies

Java Multiple roles

Chicago, IL

$75 - $85/hr

... programming languages, including C, Java. â Knowledge of database design and file management ... JIRA, Rally, VersionOne) â Good understanding /knowledge of the linux/unix commands. â ...

Aquatic Capital Management

Systems Engineer

Chicago, IL · On-site

$150K - $300K/yr

Developer Experience & Automation * Design and maintain provisioning systems for complex compute ... Deep Unix/Linux expertise across multiple distributions; comfortable at every layer of the stack.

Aquatic Capital Management

Systems Engineer

Chicago, IL · On-site

$150K - $300K/yr

Developer Experience & Automation * Design and maintain provisioning systems for complex compute ... Deep Unix/Linux expertise across multiple distributions; comfortable at every layer of the stack.

CACI International, Inc.

Software Engineer

Lisle, IL · On-site

Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to ... and/or Unix-based operating systems * Software development skills in languages such as: C, C ...

Actalent

Embedded Software Engineer

Chicago, IL

$50 - $65/hr

Proficiency in C#, C++, C, Labview, and Visual Studio. * Experience with hardware-software ... Experience with UNIX, VX-Works, VME systems, and embedded systems design. Additional Skills ...

CDK

Staff Software Engineer

Hoffman Estates, IL · On-site +1

$150K - $185K/yr

... a Linux/C environment a plus * Must be an expert in the C# programming language * Expert level capabilities in Php a plus * Must be an expert in Unix/Linux systems programming including I/O ...

Capital One

Lead Data Engineer

Chicago, IL · On-site

$118K - $141K/yr

... with UNIX/Linux including basic commands and shell scripting * 2+ years of experience with Agile engineering practices * Experience leveraging interactive AI tooling to accelerate productivity ...

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All JobsC Unix Developer JobsC Unix Developer Jobs in Illinois

C Unix Developer information

What is a C Unix developer?

A C/Unix developer uses the C programming language to prepare and implement software and applications in a Unix operating system. Unix is a core family of OS, and it is part of Linux, Apple, and many mobile OS platforms, as well as servers and other integral hardware. As a C/Unix developer, your duties and responsibilities are to work as part of a team of coders and developers on projects, helping design the project workflow and completing any tasks needed for a program to run in a Unix system. Because you primarily write Unix in C, many C/Unix developers work on projects to improve existing operating systems built of the Unix architecture.

What does a C Unix developer do?

A C Unix Developer is a software engineer who specializes in programming applications and systems using the C language on Unix-based operating systems. Their responsibilities often include designing, coding, debugging, and maintaining software, as well as optimizing system performance and ensuring reliability. They may work on low-level system components, utilities, or high-performance applications, often collaborating with other developers and IT professionals. A strong understanding of Unix/Linux commands, system calls, and networking is essential for this role.

What are the key skills and qualifications needed to thrive as a C Unix developer, and why are they important?

To thrive as a C Unix Developer, you need strong proficiency in C programming, Unix/Linux operating systems, and a solid understanding of data structures and algorithms, often supported by a degree in computer science or a related field. Familiarity with development tools like GCC, GDB, Make, and version control systems such as Git is essential, along with experience in shell scripting. Analytical thinking, problem-solving, and effective communication are standout soft skills for this role. These skills and qualities are vital to efficiently build, troubleshoot, and maintain robust software solutions in complex Unix-based environments.

What are some common challenges faced by C Unix developers when working on legacy codebases?

C Unix Developers often encounter challenges when maintaining or enhancing legacy codebases, such as deciphering poorly documented code, understanding complex pointer logic, and debugging issues that arise from outdated dependencies or system calls. Collaboration with other team members is essential, as knowledge sharing helps bridge gaps in code understanding and ensures that best practices are applied when refactoring or extending existing systems. Addressing these challenges requires strong analytical skills, patience, and effective communication within a multidisciplinary development team.

What is the difference between C Unix Developer vs Linux Developer?

AspectC Unix DeveloperLinux Developer
Required CredentialsProficiency in C, Unix system calls, and Unix shell scriptingProficiency in C, Linux system calls, and Linux shell scripting
Work EnvironmentUnix-based systems, often in enterprise or legacy environmentsLinux-based systems, common in open-source and modern applications
Industry UsageTelecommunications, finance, and legacy enterprise systemsWeb development, cloud computing, and open-source projects
Common Search/ComparisonYesYes

Both C Unix Developers and Linux Developers require strong C programming skills and familiarity with their respective operating systems. While C Unix Developers focus on Unix-based systems often used in legacy or enterprise environments, Linux Developers work primarily with Linux systems, which are prevalent in modern, open-source, and cloud applications. The roles overlap in skills but differ in system focus and industry applications.

More about C Unix Developer jobs

What are the most commonly searched types of C Unix Developer jobs in Illinois?

The most popular types of C Unix Developer jobs in Illinois are:

What are popular job titles related to C Unix Developer jobs in Illinois?

For C Unix Developer jobs in Illinois, the most frequently searched job titles are:

What job categories do people searching C Unix Developer jobs in Illinois look for?

The top searched job categories for C Unix Developer jobs in Illinois are:

C Unix Developer jobs near you
Infographic showing various C Unix Developer job openings in Illinois as of August 2026, with employment types broken down into 72% Full Time, and 28% Contract. Highlights an 90% In-person, and 10% Remote job distribution.

Senior Software Engineer

DomainTools

Chicago, IL

$126K - $166K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 8 days ago

Job description

DomainTools is hiring a Senior Software Engineer to join our Engineering Team. This role is perfect for a creative problem-solver with deep expertise in large-scale data engineering and a passion for technical leadership and continuous improvement. You'll be a key technical collaborator, not only designing and maintaining complex systems but also accelerating engineering productivity and mentoring the next generation of engineers.

We are looking for someone with a strong background in Python, Rust, GoLang, and cloud infrastructure (AWS, Docker, Kubernetes) who is eager to take on big challenges and deliver high-quality, impactful results.

Job Responsibilities

  • Design, code and maintain web-scale data systems
  • Discover, analyze and validate new data sets to add value for our customers
  • Creative problem solving to necessarily complex systems
  • Research, prove and employ cutting edge techniques & technologies
  • Provide code reviews, design feedback, demos, technical requirements & documentation
  • Provide accurate, scope, estimates for time, capacity & costs of projects
  • Improve the lives of your coworkers by accelerating engineering productivity, reducing operational toil and increasing consistency
  • Provide technical leadership, assist in on-boarding & mentoring of junior engineers

Requirements

  • 5+ years of professional development experience with Python, GoLang, Rust or equivalent languages. Expertise in Rust and Python is highly valued.
  • 3+ years of experience with cloud infrastructure, specifically AWS, Docker, and Kubernetes.
  • 3+ years of experience with web-scale data engineering, leveraging data stores such as OpenSearch, Postgres (or PSQL), CockroachDB and Spark.
  • 3+ years of professional experience with Kafka.
  • 5+ years of experience working with Linux/Unix environments.
  • Excellent written and verbal communication skills.
  • Proven ability to coordinate effectively between multiple teams.
  • A positive attitude, strong interpersonal skills, and a genuine enjoyment of collaborating with, mentoring and assisting teammates.
  • Exceptional attention to detail and a commitment to delivering high-quality results.
  • Demonstrated history of high initiative and productivity that consistently adds value.
  • A proactive attitude towards continuous learning, particularly in unfamiliar domains.
  • Excited and passionate about working within the security space.

Pluses

  • Bachelor's degree or higher in Computer Science/related field or equivalent experience
  • Design, implementation and/or maintenance of CICD & microservices
  • Experience with Data Pipelines such as ElasticSearch, NATS or Apache Airflow
  • Experience with data mining or machine learning techniques
  • Experience with text codec, encoding & web protocols
  • Bash, Scala, C, or Hive development experience
  • Experience with full stack development

Benefits

DomainTools is the global leader for Internet intelligence and the first place security practitioners go when they need to know. The world's most advanced security teams use our solutions to identify external risks, investigate threats, and proactively protect their organizations in a constantly evolving threat landscape. DomainTools constantly monitors the Internet and brings together the most comprehensive and trusted domain website and DNS data to provide immediate context and machine-learning driven risk analytics delivered in near real-time. 

DomainTools offers a comprehensive benefits package to our employees that includes fully paid medical, dental and vision insurance premiums, a 401k retirement plan with company matching, basic life insurance, flexible PTO and additional well-being benefits. 

DomainTools embraces diversity, equity and inclusion to its fullest as an equal opportunity employer. We build our teams so creativity and innovation can flourish. We believe inclusivity and equity fosters innovation and growth, and we harness this mindset to drive a culture that serves our employees and our customers. We encourage people of all backgrounds, ages, perspectives and skill sets to apply; and do not discriminate based on age, religion, color, national origin, gender, sexual orientation, gender identity, marital status, veteran status, disability or any other characteristic protected by law.

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