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Mobile Developer Jobs in Belleville, IL (NOW HIRING)

Aggio

Lead Developer

Saint Louis, MO · On-site

$57.25 - $75/hr

... mobile applications Comfortable working with agile processes and test driven development Experience with unit testing and integration testing frameworks' BS in Computer Science or related Benefits

The Timberline Group

Java / J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

We strive to keep learning and using the latest technologies from mobile (all platforms) to cloud ... Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on ...

Aggio

Lead Developer

Saint Louis, MO · On-site

$57.25 - $75/hr

Aggio (aggio.io) is looking for a Full Stack Lead developer and Technical Architect to help build a ... supporting mobile applications • Comfortable working with agile processes and test driven ...

The Timberline Group

Java / J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

We strive to keep learning and using the latest technologies from mobile (all platforms) to cloud ... Strong understanding of Object-Oriented Programming (OOP) * Analyze and develop Java solutions ...

Sonsoft Inc

UI Developer

Saint Louis, MO

$48.50 - $63.25/hr

At least 2 years experience in Production support and performance engineering. * At least 1 year of ... At least 1 year of experience in Mobile web application on cross platforms - iOS, Android and ...

Sonsoft Inc

UI Developer

Saint Louis, MO

$48.50 - $63.25/hr

At least 2 years experience in Production support and performance engineering. * At least 1 year of ... At least 1 year of experience in Mobile web application on cross platforms - iOS, Android and ...

The Timberline Group

Xamarin Developer

Saint Louis, MO · On-site +1

Role Summary The Web Application Developer's responsibilities may include: * Providing team participation and possibly leadership in supporting full project life cycle initiatives * Serve on project ...

Matrix Systems Group

***.NET DEVELOPERS***

Saint Louis, MO

$47 - $62/hr

NET DEVELOPER - we are recruiting for future openings at client companies/agencies. This job might ... mobile-friendly application by clicking on "I'm Interested." It only takes 1-2 minutes! When you ...

Matrix Systems Group

***.NET DEVELOPERS***

Saint Louis, MO · On-site

$47 - $62/hr

NET DEVELOPER - we are recruiting for future openings at client companies/agencies. This job might ... mobile-friendly application by clicking on "I'm Interested." It only takes 1-2 minutes! When you ...

Know Ink, LLC

Quality Engineer

Saint Louis, MO · On-site

$67K - $87K/yr

SDET - Software Development Engineer in Test KNOWiNK -- St. Louis, Missouri (An On-site Role) At ... Design, build, and maintain automated test frameworks and test suites across web, mobile, and API ...

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All JobsMobile Developer JobsMobile Developer Jobs in Belleville, IL

Mobile Developer information

See Belleville, IL salary details

$10

$53

$80

How much do mobile developer jobs pay per hour?

As of Sep 4, 2026, the average hourly pay for mobile developer in Belleville, IL is $53.44, according to ZipRecruiter salary data. Most workers in this role earn between $40.14 and $64.42 per hour, depending on experience, location, and employer.

What is a mobile developer?

A mobile developer is involved in app development for smartphone and mobile applications. Your job duties include creating a detailed app development plan, writing source code, and testing finished builds. Exact responsibilities may vary depending on app type, platform, your company, and the industry. The career requires you have excellent communication skills, as you collaborate with a team of other developers on a daily basis. Most mobile developers have at least a bachelor’s degree in computer science.

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

To thrive as a Mobile Developer, you need strong programming skills in languages like Swift, Kotlin, or Java, along with experience in mobile app development frameworks and a relevant degree or equivalent experience. Familiarity with integrated development environments (IDEs) such as Android Studio or Xcode, and knowledge of version control systems like Git, are crucial, as are certifications in mobile platforms. Strong problem-solving, attention to detail, and effective teamwork set standout professionals apart in this field. These competencies ensure the development of high-quality, user-friendly mobile applications that meet client and market needs.

What are some common challenges mobile developers face when working with cross-platform frameworks?

Mobile Developers often encounter challenges when using cross-platform frameworks such as React Native or Flutter, including managing platform-specific functionality and performance optimization. Ensuring a consistent user experience across iOS and Android devices can require additional testing and custom code. Additionally, keeping up with frequent framework updates and compatibility changes can be demanding. Effective collaboration with designers and backend teams is essential to address these challenges and deliver high-quality mobile applications.

What is the difference between Mobile Developer vs Web Developer?

AspectMobile DeveloperWeb Developer
Required CredentialsTypically a degree in computer science or related field; proficiency in mobile SDKs (iOS, Android)Similar degrees; expertise in HTML, CSS, JavaScript, and web frameworks
Work EnvironmentDevelops apps for iOS and Android platforms, often using IDEs like Xcode or Android StudioBuilds websites and web applications, usually working with browsers and web servers
Employer & Industry UsageTech companies, startups, app development firmsBusinesses with online presence, digital agencies, e-commerce

Mobile Developers focus on creating applications for mobile devices using platform-specific tools, while Web Developers build websites and web apps accessible via browsers. Both roles require programming skills but differ in platforms and development environments.

How much do mobile developers make?

Mobile developers typically earn a median annual salary ranging from $70,000 to $120,000, depending on experience, location, and skill set. Those proficient in both iOS and Android development or with specialized skills in Swift or Kotlin tend to earn higher salaries. Entry-level positions may start lower, while senior developers with extensive experience or certifications can earn significantly more.

Is a mobile developer a good career?

A mobile developer is a viable career choice due to the high demand for mobile applications across industries. The role typically requires skills in programming languages like Swift or Kotlin and knowledge of app development environments, with opportunities for growth and competitive salaries. The field offers a dynamic work environment and the chance to work on innovative projects.
More about Mobile Developer jobs

What are the most commonly searched types of Developer jobs in Belleville, IL?

The most popular types of Developer jobs in Belleville, IL are:

What are popular job titles related to Mobile Developer jobs in Belleville, IL?

For Mobile Developer jobs in Belleville, IL, the most frequently searched job titles are:

What cities near Belleville, IL are hiring for Mobile Developer jobs?

Cities near Belleville, IL with the most Mobile Developer job openings:

Mobile Developer jobs near you
Infographic showing various Mobile Developer job openings in Belleville, IL as of August 2026, with employment types broken down into 1% As Needed, 68% Full Time, 23% Part Time, 7% Contract, and 1% Nights. Highlights an 93% Physical, 1% Hybrid, and 6% Remote job distribution, with an average salary of $111,147 per year, or $53.4 per hour.

Lead Developer

Aggio

Saint Louis, MO • On-site

$57.25 - $75/hr

Full-time

Medical, Retirement, PTO

Re-posted 21 days ago

Job description

Company Description

Aggio (aggio.io) is a fast growing enterprise SaaS (Software as a Service) company with a mission to transform the agriculture industry by building sales and marketing applications that help our customers make better, more effective decisions.

Our Culture & Values

At Aggio we strive to create a positive atmosphere by practicing the following:

  • Always DO THE RIGHT THING: for our customers, employees, partners, and our environment.
  • Be TRANSPARENT: Build trust through transparency.
  • Be a TEAM PLAYER: We work together, win and fail together. We don't tolerate jerks.
  • Take OWNERSHIP & ACCOUNTABILITY: We are rewarded based on what we get done and not just what we do.
  • Choose SUCCESS BEFORE PERFECTION: Execute with agility.
  • Aim HIGHER: Shoot for the stars.
Job Description

Aggio (aggio.io) is looking for a Full Stack Lead developer and Technical Architect to help build a suite of scalable web applications to provide a unique experience to our users. This is a hands-on position, helping to solve technical issues for our growing number of customers. You will contribute to the technical design and implementation of features for various products as well as hire and lead a development team as our company grows.

Responsibilities

Ensure customer success by supporting existing functionality, working on customer issues, and providing the best possible solution

Implement performance improvements and architectural changes to ensure the best possible product in terms of scalability, performance, and deployment to the cloud

Innovate with new techniques and approaches to solve existing problems

Introduce and justify new frameworks and improvements

Work with data science, customer success, and product team members to develop and execute a technical roadmap

Qualifications

5+ years of software development and technical architecture experience solving complex web engineering problems

3+ years of frontend software development experience with JavaScript HTML and CSS, using tools such as Node.js, Angular, Bootstrap, jQuery, SASS, etc.

3+ years of experience designing and developing RESTful API

3+ years of experience with databases such as MySQL

Solid understanding of cloud based infrastructure platforms such as Google Cloud, AWS, Azure or similar

Nice to Have

Knowledge of SaaS applications and SaaS deployment models

Experience with NoSQL or other distributed systems

Prior experience on Force.com platform

Prior experience developing and supporting mobile applications

Comfortable working with agile processes and test driven development

Experience with unit testing and integration testing frameworks'

BS in Computer Science or related

Benefits

  • Be part of a no drama, results oriented, high performance team with a lot of autonomy for new ideas and bringing the best solutions for our customer and employees
  • Comprehensive benefits package including: health insurance, vacation, stock options and matching 401(k)
  • Dedicated training budget for each colleague
  • Extremely flexible work environment
Additional Information

All your information will be kept confidential according to EEO guidelines.

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