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Open Source Software Developer Jobs in Chicago, IL

MMI

Java Developer w/ Python or Perl

Chicago, IL · On-site

Description: -We are looking for a software developer to help us design, develop and support our ... open source projects run. -So developers who are used to using Github and contributing to open ...

Canonical

Enterprise Project Manager

Chicago, IL · Remote

Canonical is a leading provider of open source software and operating systems to the global ... Experience in Enterprise IT Programs, Process Improvement, and Software Engineering Project ...

Canonical

Telco Cloud Field Engineer

Chicago, IL · On-site +1

This transformation is driven by open source software, cloud computing and the move to VNF / CNF ... As part of the Canonical Field Engineering organization, you will lead customers through the design ...

Barrow Wise Consulting

Senior .Net Developer

Chicago, IL · On-site

$80K - $140K/yr

Knowledge of implementing open-source software and troubleshooting and debugging existing software systems. Join the team at Barrow Wise Consulting, LLC for a fulfilling and engaging experience! Our ...

Barrow Wise Consulting

Senior .Net Developer

Chicago, IL

$56.75 - $72.25/hr

Knowledge of implementing open-source software and troubleshooting and debugging existing software systems. Join the team at Barrow Wise Consulting, LLC for a fulfilling and engaging experience! Our ...

Canonical

Public Cloud Project Manager

Chicago, IL · On-site

Deep understanding of Linux, Open source, and the Public Cloud space * Software engineering experience * Excellent written and verbal communication skills in English * Experience leading cross ...

CoArena (YC S26)

Campus Ambassador

Mundelein, IL · On-site

Interest in AI, large language models, open-source software, or computer science, with the ability to explain complex topics in accessible language. * Experience in student organizations, peer ...

Infleqtion

Quantum Software Engineer (Compiler)

Chicago, IL · On-site

$145K - $170K/yr

Position Summary This Quantum Software Engineer role will join the Compiler Team within Infleqtion ... Experience with open-source quantum software frameworks such as Cirq or Qiskit; ideal candidates ...

Infleqtion

Quantum Software Engineer (Compiler)

Chicago, IL · On-site

$145K - $170K/yr

Position Summary This Quantum Software Engineer role will join the Compiler Team within Infleqtion ... Experience with open-source quantum software frameworks such as Cirq or Qiskit; ideal candidates ...

Infleqtion

Quantum Software Engineer (Compiler)

Chicago, IL · On-site

$145K - $170K/yr

Position Summary This Quantum Software Engineer role will join the Compiler Team within Infleqtion ... Experience with open-source quantum software frameworks such as Cirq or Qiskit; ideal candidates ...

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Showing results 21-40

All JobsOpen Source Software Developer JobsOpen Source Software Developer Jobs in Chicago, IL

Open Source Software Developer information

See Chicago, IL salary details

$49.4K

$115.2K

$171K

How much do open source software developer jobs pay per year?

As of Sep 9, 2026, the average yearly pay for open source software developer in Chicago, IL is $115,217.00, according to ZipRecruiter salary data. Most workers in this role earn between $92,700.00 and $133,900.00 per year, depending on experience, location, and employer.

What is an open source software developer?

Open Source Software Developers are programmers who create, maintain, or contribute to software projects whose source code is made freely available for anyone to use, modify, and distribute. They often collaborate with a global community of developers and may work on a voluntary basis or be employed by organizations that support open source initiatives. Their work involves writing code, fixing bugs, reviewing contributions, and helping manage project documentation. Open source developers play a key role in advancing technology by making software accessible and fostering innovation through community collaboration.

How do open source software developers typically collaborate with contributors from around the world?

Open Source Software Developers often work with a global community of contributors using online collaboration tools such as GitHub, mailing lists, and chat platforms like Slack or Discord. Communication is primarily asynchronous, requiring clear documentation and code review practices to ensure smooth project progress. Developers regularly participate in discussions, review pull requests, and help onboard new contributors, making strong written communication skills essential. This collaborative environment fosters learning and innovation, but also requires flexibility and patience to manage different time zones and cultural perspectives.

What are the key skills and qualifications needed to thrive as an open source software developer, and why are they important?

To thrive as an Open Source Software Developer, you need strong programming skills, knowledge of version control systems like Git, and familiarity with open source licensing, typically supported by a relevant degree or coding experience. Proficiency with collaborative development platforms such as GitHub or GitLab and understanding of continuous integration tools are commonly required. Excellent communication, self-motivation, and the ability to work effectively in distributed teams set outstanding contributors apart. These skills are crucial for efficiently building, maintaining, and contributing to widely used open source projects in a collaborative, global environment.

What is the difference between Open Source Software Developer vs Software Engineer?

AspectOpen Source Software DeveloperSoftware Engineer
CredentialsTypically requires programming skills, familiarity with open source licenses, and sometimes certifications like Linux Foundation certificationsRequires a degree in computer science or related field; certifications like Microsoft Certified or AWS certifications are common
Work EnvironmentOften collaborates in open source communities, contributes to public repositories, and works remotelyWorks in corporate or enterprise settings, often in teams within organizations
Industry UsageUsed across tech, non-profit, and open source communities; focuses on public projectsEmployed in various industries including tech, finance, healthcare, and more for product development

While both roles involve software development, Open Source Software Developers focus on collaborative, community-driven projects often in open environments, whereas Software Engineers typically work within organizations on proprietary or internal systems. The roles overlap in skills but differ in scope and work setting.

Open Source Software Developer jobs near you

Senior .Net Software Engineer

Chicago, IL • On-site

Apetan Consulting llc
IT Services • 1 - 10 employees
Learn more about Apetan Consulting llcexternal

$80 - $150/hr

Contractor

This job post has expired today. Applications are no longer accepted.

Job description

Role: Senior .Net Software Engineer

Location: Chicago, IL (full onsite)

Duration: long term

As a Software Engineer, you'll work on everything from customer-facing web and mobile applications using cutting-edge open source frameworks, to highly-available RESTful services, to back-end C# and Java based systems using the hottest techniques.

We are a team of full stack engineers with in-depth DevOps expertise. Our programming languages has been C#, Java and Python. We are big fans on building products using Open Source packages and Inner Source Components. We are also closely aligned with best practices of agile software development such as pair programming, mobbing, test-driven design, trunk development, and frequent and incremental code deliveries.

You will apply your strategic and analytical skills to major company challenges. You will team with world-class professionals to develop and test strategies that ultimately impact the bottom line. And you will do it all in a diverse, inclusive, collaborative environment that values your insight, encourages you to take on new responsibility, promotes continuous learning, and rewards innovation.

1. An architecture in the style of "Event sourcing"

2. Microservices to provide dedicated business functions

3. MS SQL Server, Oracle, AWS AuroraDB, MongoDB and Redis Cache used for creating persistent view services

4. Kafka for messaging and to enable rapid short-term recovery, horizontal scalability and workload distribution.

5. S3 for Object Storage.

Requirements

1. Programming languages: experience on C# 6+ is a must, shell scripting languages such Python are nice to have. IDE: Visual studio 2019+

2. Runtimes / Application servers - AWS, Kubernetes

3. Frameworks / libraries – Experience with Kafka, LINQ, .net core 6+, c# 6+, LINQ, Entity Framework, Nuget repo.

4. Databases: MS SQL Server & Oracle are a must. NoSQL DBs such as MongoDB, DynamoDB or Redis Cache are a plus.

5. Rules Engines experience a plus.

Must Have:

•          C# 6.0+

•          Visual Studio 2019+

•          Kubernetes

•          SQL and Oracle

•          Aurora and Mongo DB

•          Services connected using Kafka.

•          S3 AWS

Optional:

•          Nuget Package is a plus

•          AI Development experience is a plus

Additional Info:

•          Must have migration experience .net 3.5 or 4 to .net core

•          Hands on containerization experience with Kubernetes

•          Target on boarding - ASAP