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Java Developer Java Jobs in Missouri (NOW HIRING)

Laiba Technologies LLC

Java Developer

Saint Louis, MO · On-site

$48.25 - $62.50/hr

Lead/Senior Core Java Developer - Performance Tuning Location: St. Louis, MO - Onsite/Hybrid Employment Type: Contract Experience Required: 12+ Years Mandatory Domain Experience : Banking, Finance ...

Deegit Inc

Java Developer

Kansas City, MO · On-site

$49.75 - $64.50/hr

ROLE Software Engineer-Java and Web Technology The Software Engineer is assigned to a specific software solution and is responsible for writing code to meet user interface specifications.

Deegit Inc

Java Developer

Kansas City, MO · On-site

$49.75 - $64.50/hr

Company Description ROLE Software Engineer-Java and Web Technology The Software Engineer is assigned to a specific software solution and is responsible for writing code to meet user interface ...

ACI Infotech

Java Developer

Lake Saint Louis, MO · On-site

$48.25 - $62.50/hr

Onsite Sr. Java Developer Location: St. Louis, MO In short, I require ::-- Java , spring boot , microservices and AWS ( cloud is compulsory , if not AWS , any other cloud will work). Responsibilities ...

Apex Informatics

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St Louis, MO * 10+ years of hands-on software engineering experience * Excellent hands-on experience in Java * Experience in developing REST services. * Experience in unit ...

SESHENG LLC

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

Java Engineer Onsite( 5days) O''Fallon, Missouri An ideal candidate for this role would have extensive experience in Java development and be well-versed in cloud-native applications, microservices ...

Stellar IT Group

Core Java Developer

Saint Louis, MO · On-site

Core Java Developer Location: Remote Duration: 6+ Months Contract Role Overview We are seeking experienced Senior Core Java Developers to join our team and contribute to building secure, scalable ...

The Timberline Group

Java Developer

Saint Louis, MO · On-site

$48.25 - $62.50/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

The Timberline Group

Java Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

Next Level Business Services, Inc.

MO · On-site

$48.50 - $62.75/hr

Core Java Developer Location: Monroe, MO Hire Type: Full Time Only - Strong technical background with Java. -Experience in ServiceMix. -Knowledge in BPM/TIBCO. -Excellent debugging and analytical ...

Knack Solutions

Sr Java Developer

OR · Remote

$53.75 - $68.50/hr

Position: Sr Java Developer Work Authorization: All Work Authorizations Location:  100% Remote  : * We are looking a Sr Java developer who is willing to move in a Lead role. * We will ...

Gemini

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT EAD, H4 EAD, L2 EAD, H1B Visa Transfer JOB DETAILS: Below highlighted skills are mandatory. Experience ...

Gemini

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St.Louis, MO - Inperson Interview Job Type: Full Time Only OPT EAD, CPT EAD, H4 EAD, L2 EAD, H1B Visa Transfer JOB DETAILS: Below highlighted skills are mandatory. • ...

Pyramid IT

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location - St. Louis, MO Duration: Long term contract Work Authorization status : US Citizen & Green card only Mandatory Skills: J2EE (Java, JSP, Servlets, Filters, Listeners, JSTL, EL ...

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

AspectJava Developer JavaJava Software Engineer
Required CredentialsBachelor's in Computer Science, Java certificationsBachelor's in Computer Science, Java certifications
Work EnvironmentDevelopment teams, tech companies, startupsDevelopment teams, tech companies, startups
Industry UsageSoftware development, web applications, enterprise solutionsSoftware development, web applications, enterprise solutions
Common Search IntentJob roles, skills, salary infoJob roles, skills, salary info

Java Developer Java and Java Software Engineer roles often overlap in skills and work environment. Both require similar credentials and are used interchangeably in the industry. The main difference lies in the job title emphasis: 'Developer' focuses on coding and building applications, while 'Software Engineer' may imply a broader scope including design and architecture. Candidates should review specific job descriptions to understand the expectations for each role.

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Infographic showing various Java Developer Java job openings in Missouri as of August 2026, with employment types broken down into 88% Full Time, 3% Part Time, and 9% Contract. Highlights an 81% Physical, 6% Hybrid, and 13% Remote job distribution.

Java Developer

Saint Louis, MO • On-site

Laiba Technologies LLC
See more jobs at Laiba Technologies LLCexternal

$48.25 - $62.50/hr

Other

Posted 5 days ago

Job description

Job Title: Lead/Senior Core Java Developer – Performance Tuning
Location: St. Louis, MO – Onsite/Hybrid
Employment Type: Contract
Experience Required: 12+ Years
Mandatory Domain Experience : Banking, Finance, Fintech
 
Position Overview:
We are seeking a highly experienced Lead/Senior Core Java Developer with strong hands-on expertise in Java application performance tuning, JVM optimization, multithreading, and high-volume enterprise systems.
 
The ideal candidate will have experience diagnosing and resolving performance bottlenecks in complex, business-critical applications. Experience working within banking, financial services, payment processing, or transaction-based environments is highly preferred.
 
Required Skills:
  • 12+ years of professional Java development experience.
  • Strong hands-on expertise in Core Java and modern Java versions.
  • Advanced knowledge of Java collections, concurrency, multithreading, synchronization, executors, and memory management.
  • Strong experience with JVM internals and JVM performance tuning.
  • Experience analyzing heap dumps, thread dumps, garbage-collection logs, CPU utilization, and memory leaks.
  • Hands-on experience with performance-profiling and monitoring tools such as Java Flight Recorder, Java Mission Control, VisualVM, YourKit, JProfiler, Dynatrace, AppDynamics, or similar tools.
  • Strong understanding of algorithms, data structures, design patterns, and object-oriented programming.
  • Experience with Spring Boot, REST APIs, and enterprise application development.
  • Strong SQL knowledge, including query analysis and database-performance optimization.
  • Experience with load and performance-testing tools such as JMeter, Gatling, or similar tools.
  • Experience troubleshooting production applications in Linux/Unix environments.
  • Strong debugging, analytical, problem-solving, leadership, and communication skills.
Preferred Skills:
  • Experience in banking, financial services, payment processing, card-processing, or transaction-management systems.
  • Experience developing low-latency and high-throughput applications.
  • Knowledge of microservices, Kafka, distributed systems, caching, and messaging technologies.
  • Experience with cloud platforms, CI/CD pipelines, Kubernetes, and application observability.
  • Previous experience working as a Technical Lead or Senior Developer.
 
 

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