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Mobile App Developer Jobs in Washington, NJ (NOW HIRING)

Fiserv, Inc.

Senior Java Developer

Berkeley Heights, NJ · On-site

$110K - $186K/yr

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... Partner with engineering peers, product stakeholders, and support teams to deliver secure ...

Monitise

Senior Java Developer

Berkeley Heights, NJ · On-site

$110K - $186K/yr

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... Partner with engineering peers, product stakeholders, and support teams to deliver secure ...

AditiStaffing

Android Developer

Warren, NJ · On-site

$58 - $76/hr

Effectively use cloud-based solutions (GCM, Google App Engine, Firebase, other) for dynamically ... of mobile air transmission protocols such as CDMA, EVDO, LTE, WiFi a plus Strong interpersonal ...

idexcel

Software Developer

Warren, NJ

$120/hr

... Google App Engine, Firebase, other) for dynamically managing configurations, event triggers, and ... of mobile air transmission protocols such as CDMA, EVDO, LTE, WiFi a plus -Strong interpersonal ...

Technogen

Android Developer

Warren, NJ

$58 - $76/hr

Have published at least one original Android app * Experience with Android SDK * Experience with ... Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies ...

Technogen

Android Developer

Warren, NJ · On-site

$58 - $76/hr

Have published at least one original Android app * Experience with Android SDK * Experience with ... Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies ...

Monitise

Java Backend Engineer

Berkeley Heights, NJ

$110K - $186K/yr

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... Job Title Java Backend Engineer About your role: As a Java Backend Engineer you will code daily ...

Monitise

Cyber Security Engineer

Berkeley Heights, NJ · Hybrid

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... infrastructure, and DevOps teams to integrate security requirements into solution designs ...

AM Best Company

Sr. Programmer Analyst

Oldwick, NJ

$48.50 - $65.75/hr

... mobile app development is a plus Experience with Cybersecurity related code scans is a plus Experience with a CI/CD build pipeline tool like Azure DevOps Experience with cloud-based database ...

Shoptalk

Sr Server Software Engineer

Berkeley Heights, NJ · On-site

$160 - $240/hr

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... Staff Server Software Engineer What does a successful Staff Server Software Engineer do at Clover?

New

Monitise

Software Development Lead

Berkeley Heights, NJ · On-site

$90K - $152K/yr

Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, w ... As a Software Development Engineering - Advisor I, you will play a critical role in designing ...

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Showing results 21-40

All JobsMobile App Developer JobsMobile App Developer Jobs in Washington, NJ

Mobile App Developer information

See Washington, NJ salary details

$51.8K

$107K

$153.1K

How much do mobile app developer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for mobile app developer in Washington, NJ is $107,050.00, according to ZipRecruiter salary data. Most workers in this role earn between $80,900.00 and $123,500.00 per year, depending on experience, location, and employer.

What are some common challenges mobile app developers face when working on cross-platform applications?

Mobile App Developers often encounter challenges when developing cross-platform applications, such as ensuring consistent user experiences across different devices and operating systems. Managing varying hardware capabilities, screen sizes, and OS-specific behaviors can require extra testing and fine-tuning. Additionally, integrating with native features or third-party services may demand creative problem-solving to maintain performance and functionality. Collaboration with designers and QA teams is essential to address these challenges and deliver high-quality apps.

What is a mobile app developer?

Mobile app developers are professionals who design, build, and maintain applications for mobile devices such as smartphones and tablets. They use programming languages like Java, Swift, or Kotlin to create apps for platforms such as iOS and Android. These developers work closely with designers and other team members to ensure the app is user-friendly, functional, and meets client or business requirements. Their responsibilities also include testing and updating apps to fix bugs and add new features.

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

To thrive as a Mobile App Developer, you need strong programming skills in languages such as Java, Kotlin, Swift, or Flutter, supported by a relevant degree or equivalent experience. Familiarity with development environments like Android Studio or Xcode, along with knowledge of APIs and app deployment processes, is typically required. Creativity, problem-solving, and effective communication help developers interpret user needs and collaborate with designers or stakeholders. These competencies ensure the creation of high-quality, user-friendly apps that meet business objectives and industry standards.
What cities near Washington, NJ are hiring for Mobile App Developer jobs? Cities near Washington, NJ with the most Mobile App Developer job openings:
Mobile App Developer jobs near you
Infographic showing various Mobile App Developer job openings in Washington, NJ as of July 2026, with employment types broken down into 44% Full Time, 51% Part Time, and 5% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution, with an average salary of $107,050 per year, or $51.5 per hour.

Senior Java Developer

Fiserv, Inc.

Berkeley Heights, NJ • On-site

$110K - $186K/yr

Full-time

Re-posted 10 days ago

Fiserv rating

7.7

Company rating: 7.7 out of 10

Based on 95 frontline employees who took The Breakroom Quiz

106th of 150 rated financial services

Job description

Calling all innovators - find your future at Fiserv.
We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
Job Title
Senior Java Developer
About your role:
Design, develop, and maintain Java-based middleware services that support issuer applications and core business processes. Partner with engineering peers, product stakeholders, and support teams to deliver secure, resilient, and compliant solutions that meet business and regulatory needs. This role matters by helping modernize critical service-layer applications while maintaining code quality, system performance, and production stability.
What you'll do:
  • Design, develop, test, and maintain Java-based enterprise applications and middleware services that support issuer platforms and related business functions.
  • Build and enhance business service layer capabilities that store, process, and return business logic to downstream user interfaces and connected applications.
  • Develop RESTful services and application components using Java frameworks such as Spring, Enterprise JavaBeans (EJB), or similar enterprise technologies.
  • Produce secure, resilient, and maintainable code for mission-critical applications with attention to performance, fault tolerance, and compliance requirements.
  • Support production stability by troubleshooting incidents, identifying root causes, implementing fixes, and restoring service with urgency.
  • Perform code reviews, share technical guidance, and support engineering standards that improve code quality and delivery consistency across the team.
  • Collaborate with cross-functional teams in Agile delivery processes to refine requirements, estimate work, and deliver tested solutions within sprint timelines.
  • Contribute to application build-out, modernization, deployment, and maintenance activities across development and support lifecycles.
  • Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.

Experience you'll need to have:
  • 6+ years of experience designing, developing, and maintaining Java-based enterprise applications in production environments.
  • 6+ years of experience building enterprise solutions using Spring, Enterprise JavaBeans (EJB), or similar Java application frameworks.
  • 6+ years of experience developing RESTful services and integrating service-layer components across distributed systems.
  • 6+ years of experience supporting mission-critical applications with a focus on resiliency, performance, security, and production issue resolution.
  • Experience using Git, Maven, Jenkins, Jira, or similar source control, build automation, continuous integration, and Agile delivery tools.
  • Experience with security implementation using JSON Web Tokens (JWT), OAuth, or similar authentication and authorization approaches.
  • Experience with Oracle, Cassandra, or similar relational database management system (RDBMS) or NoSQL platforms, including data modeling and Java persistence application programming interfaces (APIs) such as Hibernate, Spring Data, or EclipseLink.
  • Bachelor's degree in computer science, software engineering, or a related field, or equivalent combination of education, related experience and/or military experience.

Experience that would be great to have:
  • Experience with IBM Liberty, Spring Boot, Docker, or similar containerized application platforms.
  • Experience with test-driven development and test-first engineering practices.
  • Experience with C++ development and Virtual Memory System (VMS) platforms.
  • Experience working in Scrum or other Agile software delivery environments.

Important info about this role:
  • You must currently possess valid and unrestricted U.S. work authorization to be considered for this role. Individuals with temporary visas including, but not limited to, F-1 (OPT, CPT, STEM), H-1B, H-2, or TN, or any candidate requiring sponsorship, now or in the future, will not be considered for this role.
  • We're better together. This role is fully on-site.
  • This is a full-time, direct-hire position, and no contract options for unsolicited agency submissions will be considered.

#LI-IH1
Salary Range
$110,000.00 - $186,000.00
These pay ranges apply to employees in New Jersey and New York. Pay ranges for employees in other states may differ.
It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.
For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.
Thank you for considering employment with Fiserv. Please:
  • Apply using your legal name
  • Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

Our commitment to Equal Opportunity:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact AskHR.US@fiserv.com. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv's Disability Accommodation Policy for additional information.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.

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