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Senior Back End Developer Jobs in Illinois (NOW HIRING)

Yourco, Inc

Senior Backend Engineer

Chicago, IL · On-site

You dislike over-engineering and can design simple solutions to complex problems. * You have experience planning your own work. You prefer planning work before coding. * You enjoy working with and ...

Parts Town

Senior Engineer - Backend

Addison, IL · On-site

The Job at a Glance As a Senior Engineer - Backend (SAP CC), you will be the master chef in our high-tech kitchen of backend architecture! You will design and implement secure, scalable, and high ...

Posted today

Parts Town

Senior Engineer - Backend

Addison, IL · On-site

The Job at a Glance As a Senior Engineer - Backend (SAP CC), you will be the master chef in our high-tech kitchen of backend architecture! You will design and implement secure, scalable, and high ...

Posted today

Paylocity

Senior Engineer Software, Backend

Schaumburg, IL · On-site

$120K - $159K/yr

The Senior Software Engineer leads technical initiatives and drives engineering excellence across ... NET / C# (preferred) or a comparable backend stack Company : Paylocity is an award-winning provider ...

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All JobsBack End Developer JobsSenior Back End Developer JobsSenior Back End Developer Jobs in Illinois

Senior Back End Developer information

See Illinois salary details

$62K

$135.5K

$184.6K

How much do senior back end developer jobs pay per year?

As of Aug 12, 2026, the average yearly pay for senior back end developer in Illinois is $135,507.00, according to ZipRecruiter salary data. Most workers in this role earn between $116,800.00 and $151,700.00 per year, depending on experience, location, and employer.

What are some common challenges senior back end developers face when working on large-scale systems?

Senior Back End Developers often encounter challenges such as ensuring system scalability, maintaining high performance under increased load, and designing robust APIs that can evolve over time. They must also address complex data consistency issues and integrate with multiple third-party services or legacy systems. Collaborating closely with front end, DevOps, and QA teams is crucial to align on architecture decisions and streamline deployment processes, making strong communication and problem-solving skills essential.

What is the difference between Senior Back End Developer vs Backend Engineer?

AspectSenior Back End DeveloperBackend Engineer
Required CredentialsBachelor's in CS or related field, experience in backend developmentBachelor's in CS or related field, experience in backend systems
Work EnvironmentCollaborates with front-end developers, product managers, and QA teamsWorks on server-side logic, database integration, and API development
Industry UsageCommon in tech companies, startups, and enterprise software firmsUsed across similar industries, often interchangeably with Senior Back End Developer

Both roles require similar technical skills and educational backgrounds, focusing on server-side development. The main difference lies in the seniority level and scope of responsibilities, with Senior Back End Developers typically taking on more leadership and complex project tasks compared to Backend Engineers.

What are the key skills and qualifications needed to thrive as a senior back end developer?

To thrive as a Senior Back End Developer, you need advanced programming skills (such as in Python, Java, or Node.js), a deep understanding of server-side architecture, and experience with databases, often backed by a degree in computer science or related fields. Familiarity with frameworks (like Django or Spring), RESTful APIs, cloud platforms (AWS, Azure, or GCP), and version control systems (such as Git) is typically required, along with relevant certifications. Strong problem-solving, collaboration, and communication skills help you deliver robust solutions and mentor junior developers. These skills ensure scalable, secure, and maintainable back-end systems that are vital for reliable business operations.

What is a senior back end developer?

Senior Back End Developers are experienced software engineers who specialize in building and maintaining the server-side logic, databases, and APIs that power web and mobile applications. They collaborate with front end developers and other team members to ensure seamless integration and optimal performance of applications. Their responsibilities often include designing system architecture, optimizing code for scalability, implementing security best practices, and mentoring junior developers. Senior Back End Developers typically have several years of experience and a deep understanding of programming languages such as Java, Python, Ruby, or Node.js.
What are the most commonly searched types of Back End Developer jobs in Illinois? The most popular types of Back End Developer jobs in Illinois are:
What are popular job titles related to Senior Back End Developer jobs in Illinois? For Senior Back End Developer jobs in Illinois, the most frequently searched job titles are:
What job categories do people searching Senior Back End Developer jobs in Illinois look for? The top searched job categories for Senior Back End Developer jobs in Illinois are:
What cities in Illinois are hiring for Senior Back End Developer jobs? Cities in Illinois with the most Senior Back End Developer job openings:
Senior Back End Developer jobs near you
Infographic showing various Senior Back End Developer job openings in Illinois as of August 2026, with employment types broken down into 87% Full Time, and 13% Contract. Highlights an 72% In-person, 2% Hybrid, and 26% Remote job distribution, with an average salary of $135,507 per year, or $65.1 per hour.

Senior Backend Java and AWS Engineer

3Core Systems, Inc.

Chicago, IL • On-site

$124K - $161K/yr

Contractor

Re-posted 18 days ago

Job description


Job Title: Senior Backend Java and AWS Engineer
Location: Chicago, IL 60603 (Onsite)
Duration: 13 months contract
Must Have Skills/Attributes:
• AWS
• Java
• Spring Boot
• SQL
Experience Desired:
• Advanced Java and/or Kotlin in production environments (10 yrs)
• Strong AWS expertise (10 yrs)
• Spring Boot building microservices and REST APIs (10 yrs)
• Microservices architecture and distributed systems patterns (10 yrs)
• RESTful API design and implementation with documentation (10 yrs)
• SQL and relational databases (10 yrs)
• NoSQL non-relational data stores (10 yrs)
Required Minimum Education: Bachelor's Degree
Job Description:
Required Skills:
• Strong AWS expertise - designing and operating cloud-native, highly available distributed systems.
• Advanced Java and/or Kotlin in production environments.
• Spring Boot - building microservices and REST APIs (Spring Web/MVC, dependency injection, configuration, actuator/health checks).
• Microservices architecture and distributed systems patterns (service boundaries, resiliency, fault tolerance).
• RESTful API design and implementation with documentation (OpenAPI/Swagger).
• SQL and relational databases - data modeling, query tuning, performance optimization.
• NoSQL / non-relational data stores (e.g., DynamoDB, MongoDB, Cassandra).
• CI/CD pipelines and build/deploy automation (quality gates, repeatable releases).
• Data streaming / asynchronous messaging - event-driven patterns (e.g., Kafka).
• Observability - logging, metrics, tracing, and production troubleshooting / incident investigation.
Soft Skills (Must-Have):
• Strong technical communication skills - able to clearly explain complex designs and trade-offs to engineers, product owners, and managers.
• Collaborative mindset - ability to work effectively across teams on shared architectures and dependencies.
• Technical leadership and ownership - driving decisions and follow-through on complex engineering problems.
• Strong problem-solving and analytical thinking - especially in debugging, production support, and performance issues.
• Ability to balance technical depth with delivery - making pragmatic decisions aligned with business priorities.
• Comfortable participating in Agile ceremonies (stand-ups, sprint planning, retrospectives) while remaining primarily hands-on.
Job Requirements:
• Provide deep technical leadership for the design and implementation of Java-based, cloud-native systems on AWS.
• Define service architecture, data flows, and integration patterns to meet strict scalability, availability, and security requirements.
• Drive architectural decisions across microservices, event-driven, and asynchronous processing patterns.
• Ensure clear service ownership and well-defined contracts between services.
• Define standards for infrastructure-as-code, resiliency, fault tolerance, and graceful degradation.
• Proactively identify architectural bottlenecks, scalability constraints, and technical debt.
• Lead development of core backend services using modern Java frameworks and AWS-native patterns.
• Design and implement RESTful and event-based APIs.
• Build message-driven processing and distributed data management solutions.
• Guide adoption of AWS services including managed compute, messaging, storage, and databases.
• Investigate and resolve defects, performance issues, and production incidents.
• Implement fixes and improvements to ensure system stability and reliability.
• Support reliable operation of distributed systems in production through observability, logging, metrics, and tracing.
• Review pull requests and lead technical design discussions.
• Define architecture and implementation standards for the team.
• Establish technical best practices for CI/CD automation, observability, and production troubleshooting.
• Work closely with the engineering team to guide design and implementation of Java-based services on AWS.
• Collaborate with other engineering teams to align on APIs, integrations, and shared cloud architecture.
• Partner with Product Owners and engineering managers to translate requirements into technical solutions.
• Align execution with delivery priorities.
• Participate in architecture reviews and integration discussions.
• Participate in sprint planning, backlog refinement, stand-ups, and retrospectives.
• Attend necessary technical and operational calls.
Skill Set
Java Backend, Spring Boot, AWS, SQL

Apply