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Senior Software Engineer Jobs in Romeoville, IL (NOW HIRING)

Kunai

Senior Software Engineer

Chicago, IL · On-site

$126K - $166K/yr

We are seeking a Senior Software Engineer to join a high-impact digital payments modernization program supporting the integration of a major card network into one of the largest financial ...

hyrusinc

Embedded Software Engineer Sr

Oak Brook, IL · On-site

$125K - $164K/yr

Senior Software Engineer Bachelor's degree in Computer Science, Computer Engineering, Software Engineering, Electrical Engineering, or related technical field. 5+ years of experience developing ...

New

Supernova Technology

Senior Software Engineer

Chicago, IL · On-site

$140K - $160K/yr

About the Role We're looking for a Senior Software Engineer who is passionate about leading and developing talented engineers while driving the delivery of high-quality, scalable software. You'll ...

YO AI Labs

AI Software Engineer - Remote

Chicago, IL · Remote

$80 - $120/hr

Senior Software Engineer Job Type: Contractor (~15 hours/week) Location: Remote Job Summary We are seeking experienced Senior Software Engineers to support an AI training project by creating ...

CNH Industrial Group

Senior Software Engineer

Oak Brook, IL · On-site

$123K - $163K/yr

A Senior Software Engineer is responsible for leading software development projects, designing and implementing solutions, and ensuring code quality. They also mentor junior engineers, contribute to ...

Rewards Network

Senior Software Engineer (Java)

Chicago, IL

$128K - $169K/yr

The Senior Software Engineer (Java) will perform new development as well as escalated product support. We are looking for a passionate problem solver that is highly focused, agile and who thrives in ...

Rewards Network

Senior Software Engineer (Java)

Chicago, IL · On-site

$128K - $169K/yr

The Senior Software Engineer (Java) will perform new development as well as escalated product support. We are looking for a passionate problem solver that is highly focused, agile and who thrives in ...

Rewards Network

Senior Software Engineer (Java)

Chicago, IL · On-site

$128K - $169K/yr

The Senior Software Engineer (Java) will perform new development as well as escalated product support. We are looking for a passionate problem solver that is highly focused, agile and who thrives in ...

Rewards Network

Senior Software Engineer (Java)

Chicago, IL · On-site

$128K - $169K/yr

The Senior Software Engineer (Java) will perform new development as well as escalated product support. We are looking for a passionate problem solver that is highly focused, agile and who thrives in ...

Arrive Logistics

Senior Software Engineer

Chicago, IL · On-site

$140K - $165K/yr

Who We Want A Senior Software Engineer will work closely with Product Managers, Design, and their Engineering team to create solutions, develop stories, and execute these improvements for Arrive ...

Rival

Senior Software Engineer

Chicago, IL · On-site

$126K - $166K/yr

Who We Want A Senior Software Engineer will work closely with Product Managers, Design, and their Engineering team to create solutions, develop stories, and execute these improvements for Arrive ...

Ritchie Bros.

Senior Software Engineer

Westchester, IL · On-site

$99K - $123K/yr

About the Role As a Senior Software Engineer, you will play a pivotal role in shaping the architecture, quality, and technical direction of our proprietary e-commerce software platform. You will work ...

Ritchie Bros.

Senior Software Engineer

Westchester, IL · On-site

$121K - $160K/yr

About the Role As a Senior Software Engineer, you will play a pivotal role in shaping the architecture, quality, and technical direction of our proprietary e-commerce software platform. You will work ...

Arrive Logistics

Senior Software Engineer

Chicago, IL · On-site +1

$140K - $165K/yr

Who We Want A Senior Software Engineer will work closely with Product Managers, Design, and their Engineering team to create solutions, develop stories, and execute these improvements for Arrive ...

Coinflow

Senior Software Engineer

Chicago, IL · On-site

$140K - $190K/yr

About The Role We're looking for a Senior Software Engineer to help build the core infrastructure powering global payments. You'll design and implement systems that process billions of dollars in ...

YO AI Labs

AI/ML Software Engineer - Remote

Chicago, IL · Remote

$80 - $120/hr

Senior Software Engineer Job Type: Contractor (~15 hours/week) Location: Remote Job Summary We are seeking experienced Senior Software Engineers to support an AI training project by creating ...

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All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Romeoville, IL

Senior Software Engineer information

See Romeoville, IL salary details

$77K

$146.1K

$195.8K

How much do senior software engineer jobs pay per year?

As of Sep 13, 2026, the average yearly pay for senior software engineer in Romeoville, IL is $146,101.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,900.00 and $164,700.00 per year, depending on experience, location, and employer.

What is a senior software engineer?

A senior software engineer designs, codes, tests, and maintains computer software. While these are your primary responsibilities as a senior software engineer, you may also have supervisory duties. These include overseeing a team of junior software engineers or developers. The senior software engineer title is sometimes used interchangeably with senior developer, and positions for both may share similar job duties and responsibilities. In general, software engineers are distinguished from developers in that software engineers apply engineering principles to software development.

What are the key skills and qualifications needed to thrive as a senior software engineer, and why are they important?

To thrive as a Senior Software Engineer, you need advanced programming skills, deep understanding of software architecture, and several years of experience in software development, often supported by a relevant degree. Familiarity with tools like Git, CI/CD pipelines, cloud platforms, and expertise in technologies such as Java, Python, or JavaScript are typically required. Leadership, problem-solving, and effective communication are crucial soft skills for mentoring teams and collaborating across departments. These skills ensure the delivery of robust, scalable solutions and drive successful project outcomes in complex technical environments.

What are some common challenges senior software engineers face when mentoring junior team members?

Senior Software Engineers often mentor junior colleagues, which can be incredibly rewarding but also presents challenges. Balancing mentorship with project deadlines can be demanding, as it requires strong time management and communication skills. Additionally, adapting explanations to different learning styles and levels of experience can be tricky. However, effective mentorship helps build a stronger team and can lead to enhanced leadership opportunities for the senior engineer.

What is the difference between Senior Software Engineer vs Software Developer?

AspectSenior Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; entry to mid-level experience
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing features, debugging
Industry UsageUsed across tech companies, startups, enterpriseCommon in software firms, startups, freelance work
Search & ComparisonOften compared for experience level, responsibilitiesCompared for entry-level to mid-level roles

The main difference between a Senior Software Engineer and a Software Developer lies in experience, responsibilities, and scope. Senior Software Engineers typically have more experience, lead projects, and mentor others, while Software Developers focus on coding and feature development. Both roles are essential in tech companies, but the Senior Software Engineer position involves higher-level planning and leadership.

What does a senior software engineer do?

A senior software engineer designs, develops, and maintains software applications, often leading projects and mentoring junior team members. They analyze requirements, write code, perform testing, and collaborate with cross-functional teams to ensure quality and efficiency. Proficiency in programming languages, problem-solving skills, and experience with development tools are essential for this role.
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For Senior Software Engineer jobs in Romeoville, IL, the most frequently searched job titles are:

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Senior Software Engineer jobs near you
Infographic showing various Senior Software Engineer job openings in Romeoville, IL as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $146,101 per year, or $70.2 per hour.

Senior Software Engineer

Chicago, IL • On-site

Kunai
IT Services • 51 - 200 employees
Learn more about Kunaiexternal

$126K - $166K/yr

Full-time

Re-posted 6 days ago

Job description

Kunai builds full-stack technology solutions for banks, credit and payment networks, infrastructure providers, and their customers. Together, we are changing the world's relationship with financial services. At Kunai, we help our clients modernize, capitalize on emerging trends, and evolve their business for the coming decades by remaining tech-agnostic and human-centered.
We are seeking a Senior Software Engineer to join a high-impact digital payments modernization program supporting the integration of a major card network into one of the largest financial institutions in the United States. This is a hands-on engineering role at the intersection of legacy and modern infrastructure, where you will contribute to both the reliability of mission-critical payment systems today and help shape the architecture that will power them tomorrow. You will work across scalable backend services, performance testing frameworks, and application engineering - with real opportunity to grow your skills on modern cloud-native technologies as the program evolves.
WHAT YOU'LL DO
You will be embedded across one or more workstreams supporting digital payments engineering, with responsibilities that may include:
Scalability, Performance Testing & Validation
  • Design and execute enterprise-grade performance testing strategies for payment processing services, defining frameworks, tooling, and success criteria from the ground up.
  • Identify performance bottlenecks across legacy and modern service layers and drive measurable improvements through analysis and targeted optimization.
  • Instrument and validate services running on Java, Oracle, Tomcat, and WebSphere as well as modern workloads running on PostgreSQL and OpenShift.
  • Collaborate with backend engineers to ensure scalability requirements are met across all environments prior to release.
  • Translate performance findings into clear recommendations for engineering leads and stakeholders.

Application Engineering
  • Build and maintain full-stack backend services supporting card network integration, working primarily in Java with PostgreSQL and OpenShift Container Platform (OCP).
  • Contribute to application modernization efforts, migrating and re-platforming services from legacy infrastructure to cloud-native environments.
  • Leverage AI-assisted development tooling (including GitHub Copilot) to improve development velocity and code quality.
  • Participate in code reviews, architectural discussions, and cross-team technical planning sessions.

General Engineering
  • PCI data purging pipelines and event-driven architecture patterns including token removal and event consumption.
  • Work with event-driven services running on OpenShift and Oracle and PostgreSQL backends to support data lifecycle and compliance requirements.
  • Serve as a flexible, senior contributor across teams where engineering depth and experience are needed most.

REQUIRED SKILLS & EXPERIENCE
Core Engineering
  • 5+ years of professional software engineering experience, primarily in Java.
  • Strong working knowledge of relational databases - Oracle and/or PostgreSQL required.
  • Experience deploying and operating services in containerized environments (OpenShift, Kubernetes, or equivalent).
  • Familiarity with legacy enterprise application servers - Tomcat and/or WebSphere experience a plus.

Performance Engineering
  • At least one enterprise-level performance testing engagement - defining strategy, selecting tooling, executing tests, and presenting findings.
  • Experience with performance profiling, load testing, and bottleneck resolution in high-throughput, distributed systems.
  • Ability to design logical, streamlined test frameworks from scratch and operate with minimal guidance.

Payments & Financial Services
  • Background in digital payments, card processing, or financial services technology strongly preferred.
  • Understanding of PCI compliance requirements and secure data handling practices.
  • Familiarity with event-driven architecture patterns and OpenShift-based eventing.

Collaboration & Communication
  • Demonstrated ability to work effectively in large, matrixed program environments with multiple teams and stakeholders.
  • Strong written and verbal communication skills; able to translate technical complexity for non-technical audiences.
  • Comfortable operating in environments with evolving requirements and ambiguity.

NICE TO HAVE
  • Experience with PGLogical or PostgreSQL logical replication.
  • Exposure to AI-assisted development tools (GitHub Copilot or Claude).
  • Prior work on bank or card network integration programs.
  • Experience working in segregated or air-gapped development environments.

At this time we are unable to provide sponsorship for this role.
In lieu of a Bachelor's degree, for each year of college not completed, demonstrate three years of specialized training and/or progressively responsible work experience with JAVA or related technologies, concurrent with the minimum years of experience required for the role.
Our success over the past 20 years is rooted in our exceptional team, which thrives in a culture of collaboration, creativity, and continuous learning.
We are proud to offer our employees a range of benefits, including competitive compensation, professional development opportunities, and flexible work arrangements, all designed to help them thrive. As we continue to expand, we remain committed to cultivating an environment where people feel valued, have a voice, and are given the tools to grow-both personally and professionally-while pushing the boundaries of innovation in the fintech industry.
Minimum Degree Required:
  • Bachelor's Degree, in lieu of a degree, demonstrating in addition to the minimum years of experience required for the role, three years of specialized training and/or progressively responsible work experience in technology for each missing year of college is required

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