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Senior Java Engineer Jobs in New Brunswick, NJ (NOW HIRING)

Scadea

Sr. Java Developer

New York, NY

$62.75 - $79.75/hr

Job Title: Sr. Java Developer Location: NJ or NYC Length: 6-10 months Position Summary: We are seeking a seasoned Senior Java Developer with a deep specialization in high-throughput trading platforms.

ACI Infotech

Sr Java Developer / Lead

Somerset, NJ · On-site

Role: Sr Java Developer / Lead Location: New Jersey Mode: Hybrid Duration: FULL TIME Key Skills: Java SQL and Strong MS Azure / AWS Accepting H1B transfer candidates We are seeking an exceptional Sr ...

Precision Technologies Corp

Senior Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

We are looking for a Senior Java Developer who will design, develop, and maintain Java-based systems for equities trading, focusing on backend development, potentially including front-end components ...

Ventures Unlimited Inc

Senior Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

Senior Java Developer Location: New York, NY Type: Fulltime // Permanent Interview Process: Phone and Skype Hire End Customer: Banking domain Strong Core Java hands on knowledge. Hands on experience ...

Integrated Resources INC

Sr Java Developer

New York, NY

$62.75 - $79.75/hr

Senior Java Developer Location - NYC,NY Duration: 6 Months Only EAD, GC and Citizens with W2 can ... engineer level roles within complex multi-platform environments Evidence of troubleshooting and ...

SREYO

Sr Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

Great communication skills, including active listening and comprehending system requirements Desired Skills for Sr. Java Software Engineer: * Knowledge of continuous integration and release ...

SREYO

Sr Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

Great communication skills, including active listening and comprehending system requirements Desired Skills for Sr. Java Software Engineer: * Knowledge of continuous integration and release ...

SREYO

Sr Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

Great communication skills, including active listening and comprehending system requirements Desired Skills for Sr. Java Software Engineer: * Knowledge of continuous integration and release ...

SREYO

Sr Java Developer

New York, NY · On-site

$62.75 - $79.75/hr

Great communication skills, including active listening and comprehending system requirements Desired Skills for Sr. Java Software Engineer: * Knowledge of continuous integration and release ...

MM International

Sr Java Fullstack Developer

Woodbridge, NJ · On-site

$57.75 - $73.75/hr

Title: Sr Java Fullstack Developer Locations: Woodbridge Township, NJ (Hybrid), (3 days onsite/2 wfh) Duration: 12+ Months Contract Interview Process: 1 round, potentially 2 worst case Required ...

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All JobsJava Engineer JobsSenior Java Engineer JobsSenior Java Engineer Jobs in New Brunswick, NJ

Senior Java Engineer information

See New Brunswick, NJ salary details

$11

$64

$89

How much do senior java engineer jobs pay per hour?

As of Aug 12, 2026, the average hourly pay for senior java engineer in New Brunswick, NJ is $64.84, according to ZipRecruiter salary data. Most workers in this role earn between $56.83 and $72.45 per hour, depending on experience, location, and employer.

What are some common challenges senior Java engineers face when working on large-scale enterprise applications?

Senior Java Engineers often encounter challenges such as managing complex codebases, ensuring application scalability, and maintaining high performance under heavy loads. They are also responsible for implementing robust security practices and integrating new technologies without disrupting existing systems. Effective collaboration with cross-functional teams and mentoring junior developers are crucial aspects of the role, as these responsibilities help maintain code quality and project momentum.

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

AspectSenior Java EngineerJava Developer
Required CredentialsBachelor's in Computer Science, Java certifications (e.g., Oracle Certified Professional)Bachelor's in Computer Science or related field, Java certifications optional
Work EnvironmentDesigning, developing, and maintaining complex Java applications, often in team leadership rolesDeveloping Java applications, focusing on coding and implementation
Industry UsageUsed across finance, tech, and enterprise sectors for large-scale projectsCommonly employed in software development firms, startups, and tech companies

While both roles involve Java programming, Senior Java Engineers typically handle complex system design, mentorship, and project leadership, whereas Java Developers focus more on coding and implementing features. The senior role often requires more experience and certifications, with a broader scope of responsibilities.

What are the key skills and qualifications needed to thrive as a senior Java engineer?

To thrive as a Senior Java Engineer, you need advanced proficiency in Java programming, strong knowledge of software design patterns, and a degree in computer science or related field. Experience with frameworks like Spring, Hibernate, build tools such as Maven or Gradle, and familiarity with cloud platforms and CI/CD systems are typically required. Excellent problem-solving abilities, leadership, and effective communication help you guide teams and collaborate with stakeholders. These skills are crucial for delivering robust, scalable software solutions and mentoring junior engineers in complex development environments.

What is a senior Java engineer?

Senior Java Engineers are experienced software developers who specialize in designing, developing, and maintaining applications using the Java programming language. They often lead development teams, architect solutions, and ensure that software meets both technical and business requirements. Their responsibilities also include code reviews, mentoring junior developers, and optimizing application performance. Typically, they have several years of experience and a deep understanding of Java frameworks and best practices.
What cities near New Brunswick, NJ are hiring for Senior Java Engineer jobs? Cities near New Brunswick, NJ with the most Senior Java Engineer job openings:
Senior Java Engineer jobs near you
Infographic showing various Senior Java Engineer job openings in New Brunswick, NJ as of August 2026, with employment types broken down into 89% Full Time, 6% Part Time, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $134,857 per year, or $64.8 per hour.

AI Accelerated Senior Java Engineer

Fiserv, Inc.

Berkeley Heights, NJ • On-site

$130K - $171K/yr

Full-time

Re-posted 7 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
AI Accelerated Senior Java Engineer
About your role:
As an AI Accelerated Senior Java Engineer you will be an elite software builder who delivers high-scale, enterprise-ready systems at exceptional speed, at ~10x. This role is for a highly productive engineer who multiplies their individual output by integrating advanced Generative AI and Large Language Model (LLM) developer tools into their daily workflow. Far beyond writing standard application code, this builder builds production-grade Minimum Viable Products (MVPs), designs intelligent agentic workflows, and architectures scalable backend software that leverages LLMs directly to solve complex business problems.
You will have a proven track record of shipping actual production-scale products, moving rapidly past localized sandboxes or basic code prototypes, as well as an exceptional builder mindset focused on hyper-efficiency, continuous tooling experimentation, and engineering velocity.
What you'll do:
  • High-Velocity MVP Delivery: Move rapidly from design concepts to writing production-ready code. Ship fully realized, resilient enterprise applications with speed and autonomy.
  • AI-Assisted Engineering: Seamlessly embed GenAI assistants into daily workflows to drastically accelerate code writing, refactoring, test generation, and deep debugging.
  • LLM & AI Application Building: Design, implement, and deploy application layers that integrate LLMs, retrieval-augmented generation (RAG) pipelines, and intelligent agentic workflows.
  • Enterprise Java Engineering: Architect and write clean, maintainable, and high-performance Java code capable of processing concurrent, enterprise-scale workloads.
  • CI/CD & Cloud Automation: Build and manage automated pipelines to package, test, and deploy applications continuously to cloud ecosystems.
  • Architecture & Database Integration: Model secure, low-latency relational and non-relational database layers optimized for rapid application execution.
  • Performance Tuning & Diagnostics: Conduct deep-dive profiling, memory leak detection, and technical troubleshooting on high-throughput backend services.

Experience you'll need to have:
  • 8-10+ years in professional software engineering, with a strong focus on core backend Java platforms.
  • Execution: A proven track record of shipping actual production-scale products, moving rapidly past localized sandboxes or basic code prototypes.
  • Automation & Testing: Expert proficiency in writing automated unit, integration, and performance tests (e.g., JUnit, Mockito, Testcontainers).
  • Mindset: An exceptional builder mindset focused on hyper-efficiency, continuous tooling experimentation, and engineering velocity.
  • Advanced, hands-on engineering using Java 17+ or Java 21+ features (e.g., Virtual Threads, Pattern Matching).
  • Deep expertise with Spring Boot, Quarkus, or Micronaut frameworks for building cloud-native microservices.
  • Developer Velocity: Demonstrated mastery using GenAI developer assistants (e.g., GitHub Copilot, Claude Code, etc.) to achieve "10x" development, documentation, and unit test coverage.
  • LLM Engineering: Hands-on integration with LLM APIs (OpenAI, Anthropic, or Amazon Bedrock) and vector databases.
  • AI Frameworks: Building RAG and agent patterns using orchestration toolkits like Spring AI.
  • Data Layers: Practical experience with PostgreSQL, NoSQL stores, and connection optimization.
  • Streaming/Messaging: Experience with high-throughput message brokers like Apache Kafka or AWS SQS/SNS.
  • Deployment: Familiarity with Docker, Kubernetes, and major cloud environments preferably AWS.
  • Bachelor's degree in Computer Science, Information Technology, Information Systems, or a related field (or equivalent industry experience).

Experience that would be great to have:
  • Experience in fintech/payments domains.

Important information about this role:
  • This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
  • 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.
  • This is a full-time, direct-hire position, and no contract options for unsolicited agency submissions will be considered.
  • All offers of employment are contingent on standard background checks. Fiserv and certain of its affiliated companies are federal, state, and/or local government contractors. Should this position support a Federal Government contract, now or in the future, the successful candidate will be subject to a background check conducted by the U.S. Government to determine eligibility and suitability for federal contract employment for public trust or sensitive positions. Positions that support state and/or local contracts also may require additional background checks to determine eligibility and suitability.

#LI-MK1
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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