Top 187 Java Jobs in O Fallon, Il

Lead Software Engineer
Emergent Software —St. Louis, MO
- $140,000 - $160,000 a year
- Full-time
- Remote
- 5 years
- Java
- Mentoring
Quick Apply
Big Data Admin
Sonsoft Inc —St. Louis, MO
- Full-time
- Mid-level
- Java
- Analysis skills
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Big Data
Sonsoft Inc —St. Louis, MO
- Full-time
- Java
- Analysis skills
- Bachelor's degree
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Software II Developer
BJC HealthCare —St. Louis, MO
- $76,252.80 - $124,155.20 a year
- Full-time
- Computer science
- Computer Science
- Mid-level
- Disability insurance
- Health insurance
14d
Java Angular Full Stack Engineer
Stellar IT Solutions LLC —St. Louis, MO
- $52 - $58 an hour
- Remote
- Java
- AWS
- Mentoring
Quick Apply
C++ Software Engineer
London Stock Exchange Group —St. Louis, MO
- $95,700 - $159,700 a year
- Full-time
- Azure
- Mid-level
- 3 years
- Commuter assistance
- Health insurance
Junior Java/Web Developer
Sovereign Technologies —St. Louis, MO
- Oracle
- Computer Science
- Bachelor of Science
Entry-Level Connector Developer
Nomad eCommerce —St. Louis, MO
- Part-time
- Remote
- Azure
- Computer Science
- ERP systems
Quick Apply
13h
Java/J2EE developer Sr.
kollasoft —St. Louis, MO
- Contract
- Oracle
- Mentoring
- Senior level
Quick Apply
Java - SDET
VRProIT —St. Louis, MO
- Mid-level
- Java
Quick Apply
Web Developers
Swip Systems —St. Louis, MO
- Email
- Customer service
- Mid-level
- Office
Software Engineer, Information Technology
NISA Investment Advisors, LLC —St. Louis, MO
- Full-time
- Computer science
- Computer Science
- Mid-level
- Wellness program
- Health insurance
Mid-level Software Engineer
DLS Engineering —St. Louis, MO
- $100,000 - $105,000 a year
- Full-time
- Background check
- Computer science
- Azure
- Disability insurance
- Health insurance
Quick Apply
Software Engineer II - Remote
CSAA Insurance Services, Inc. —St. Louis, MO
- $41.07 - $54.76 an hour
- Full-time
- Computer science
- Mid-level
- US work authorization
- 401(k) matching
1d
Software III Developer - ServiceNow
BJC HealthCare —St. Louis, MO
- $101,483.20 - $165,276.80 a year
- Full-time
- Bachelor's degree
- Continuous improvement
- Children
- Disability insurance
- Health insurance
Software Engineer
Sovereign Technologies —St. Louis, MO
- Computer Science
- Mid-level
- IT
Sr. Java Programmer
Rely Systems —Belleville, IL
- Mid-level
- Office
- IT
Senior .NET Developer
Sovereign Technologies —St. Louis, MO
- Computer science
- Computer Science
- Mid-level
Java Developer- Direct Hire- 150213
Sovereign Technologies —St. Louis, MO
- Mid-level
- Java
- Python
Software Engineer
Reinventing Geospatial, Inc. (RGi) —St. Louis, MO
- $115,000 - $170,000 a year
- Full-time
- Computer science
- Computer Science
- 5 years
- Paid parental leave
- Health insurance
Quick Apply

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Lead Software Engineer

Emergent Software -
St. Louis, MO

Quick Apply

Job Details

Full-time
$140,000 - $160,000 a year

Qualifications

Performance monitoring
Authentication
Secure web application development
Software engineering
Incident management
Improving system uptime or availability
Managing IT teams
Team development
Technology management experience
Incident management operations support
Mentoring
Systems engineering
Software documentation
Production monitoring
Developing and maintaining backend systems
Monitoring system implementation
Web applications
Cloud monitoring
Managing software development teams
Web services design

Full Job Description

**This position is a direct hire for one of our clients. This is a remote position. Eligible candidates must currently reside in the US and authorized to work in the US without visa sponsorship.**

Our client is seeking a highly skilled and hands-on Lead Software Engineer to play a pivotal role in building and scaling a new API platform that will support strategic integrations with external SaaS partners. This is a unique opportunity to help define the technical vision, lead platform development efforts, and build a high-impact engineering function from the ground up. The role combines technical leadership, software architecture, and cross-functional collaboration in a highly visible initiative that will directly support business growth.

Primary Duties

Lead the design, development, and evolution of a partner-facing API platform.
Architect and maintain a well-versioned, secure, and developer-friendly public API surface with a focus on backward compatibility, authentication, rate limiting, and documentation.
Define and implement API architecture, standards, and best practices.
Provide hands-on technical leadership through architecture guidance, code reviews, mentoring, and engineering best practices.
Own the long-term technical strategy and roadmap for the platform.
Collaborate closely with product managers, project managers, and engineering teams across multiple platforms.
Lead and coordinate the work of distributed engineering resources, including international contractors.
Own production systems for partner APIs, including monitoring, observability, incident response, alerting, performance optimization, reliability, and operational readiness.
Drive integration efforts with external SaaS platforms and partners.
Help establish engineering processes, technical direction, and team standards as the platform grows.
Break down complex initiatives into actionable workstreams and translate business requirements and acceptance criteria into technical deliverables.
Develop project plans, coordinate resources, and drive timely delivery of key initiatives.
Contribute to architecture and technical decision-making across services and platforms developed in multiple programming languages.
Serve as both a technical leader and hands-on contributor during the initial build phase.

Qualifications

5+ years of experience developing web-based software applications, including experience leading or mentoring engineers.
Deep experience designing, securing, documenting, and operating REST APIs, including authentication, versioning, and lifecycle management.
Strong experience managing and supporting production systems.
Hands-on experience with AWS services, particularly API Gateway, ECS, and related cloud-native technologies.
Strong TypeScript development experience.
Demonstrated technical leadership and project coordination experience.
Ability to quickly become productive in unfamiliar codebases and technology stacks.

Experience managing live customer-facing systems, including monitoring, observability, incident response, and reliability engineering.
Strong communication skills and the ability to thrive in a fast-paced, evolving environment.

Nice to Have Skills

Experience working across multiple backend languages such as C#, Java, Go, Python, Ruby, Node.js, or TypeScript.
Experience designing and delivering public, partner-facing, or developer-focused APIs and supporting developer documentation.
Experience with Infrastructure as Code tools such as Terraform, CloudFormation, or AWS CDK.
Experience working within Agile, Scrum, or Kanban environments.
Experience with test automation, contract testing, and test-driven development.
SaaS platform experience.
Familiarity with web application security and API security best practices.
Experience leading distributed or global engineering teams.

Our Vetting Process

At Emergent Staffing, we work hard to find the best people capable of delivering high quality services to our clients. If you think you’re one of those, please understand that the effort put into this by people like yourself helps us be successful in surrounding you with other top-notch people. Here are the steps of our vetting process for this position:

Application (5 minutes)
Online Assessment (40-60 minutes)
Initial Video Interview (45 minutes)
Hiring Manager Phone Interview (30 minutes)
Hiring Manager Video Interview (60 minutes)
Hiring Team Interview
Job Offer!

Eligible candidates must reside in one of the following states: Alabama, Arizona, Arkansas, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Michigan, Minnesota, Missouri, New Hampshire, New Mexico, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, or Wisconsin

#EmergentStaffing

#IND55

Quick Apply

Refine Your Search

java jobs in o fallon, il

Lead Software Engineer

Big Data Admin

Big Data

Software II Developer

Java Angular Full Stack Engineer

C++ Software Engineer

Junior Java/Web Developer

Entry-Level Connector Developer

Java/J2EE developer Sr.

Java - SDET

Web Developers

Software Engineer, Information Technology

Mid-level Software Engineer

Software Engineer II - Remote

Software III Developer - ServiceNow

Software Engineer

Sr. Java Programmer

Senior .NET Developer

Java Developer- Direct Hire- 150213

Software Engineer

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