Jobs in the United States

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Added 4 hours ago
H
DevOps Infrastructure Administrator
HP
Spring, TX
- $147,050 to $230,850 USD / year
Added 4 hours ago
Data Engineer - SQL
R+L Carriers
Ocala, FL
Added 4 hours ago
Senior Software Development Engineer
Expedia, Inc.
WA
This Senior Software Developer role is part of the BEX Product team which sits within our Technology division. The team delivers end-to-end Brand Expedia experiences across Home, Attach,…
Added 4 hours ago
Contact Center Technical Lead
RPMS RoundPoint Mortgage Servicing
Remote, United States
Experience with Microsoft Azure, cloud application development, and API-based integrations, preferred.
Added 4 hours ago
Senior Software Engineer
LendingTree
Charlotte, NC
2+ years of that experience in RESTful API development
Added 4 hours ago
Principal ScienceLogic Skylar 1/SL1 Engineer
Global Enterprise Services, LLC
Fort Meade, MD
Configure monitoring using appropriate protocols and technologies, including SNMPv3, ICMP, HTTPS/API, SSH, WMI/WinRM, and other approved mechanisms.
Added 4 hours ago
AI Full Stack Developer
CACI, INC.-FEDERAL
Dayton, OH
· Backend Development: Advanced proficiency in Python and API frameworks (e.g., FastAPI, Flask) to build the core logic and connect user interfaces to AI models.
Added 4 hours ago
Service Now CMDB SME
CACI, INC.-FEDERAL
Remote, United States
Added 4 hours ago
RPA Developer
CACI, INC.-FEDERAL
Remote, United States
We are seeking a RPA (Robotic Process Automation) Developer to support the Joint Transportation Management System (JTMS) program. The ideal candidate will work with automation technologies…
Added 4 hours ago
Senior ServiceNow ITMS Developer
CACI, INC.-FEDERAL
Remote, United States
We are seeking an experienced ServiceNow ITSM Senior Developer to lead the design, development, and implementation of IT Service Management solutions. This role requires deep technical…
Added 4 hours ago
Supply Chain Engineering Project Manager
NFI Industries
San Francisco, CA
Experience with IT development: SQL developer, API/EDI development, Adv MS Access developer
Added 4 hours ago
Junior Tester
9th Way Insignia
Remote, United States
Understanding of API testing using tools like Postman, RestSharp, or similar libraries.
Added 4 hours ago
Sr Java Developer
Charles Schwab
Southlake, TX
…curated investment themes backed by Schwab research. As a Java Developer on the Thematic Core Services team, you will play a key role in designing and delivering scalable, high-performing…
Added 4 hours ago
Manager, Software Development and Engineering
Charles Schwab
Southlake, TX
Schwab is recruiting a driven, results-oriented software developer who shares our passion for technology, innovation and excellence. Our main goal here at Schwab is to transform people’s…
Added 4 hours ago
Blue Yonder WMS Techno/Functional Lead
Accenture
Houston, TX · Irving, TX · Austin, TX
Minimum of 2 years of hands on technical (MOCA, SQL, API-based integration, and Java development) and functional (BY WMS application configuration capabilities, common pitfalls, and…
Added 4 hours ago
RA
Strategic Account Executive
River AI Inc.
Palo Alto, CA
- $200,000 to $350,000 USD / year
We are seeking experienced Founding Account Executives to drive the growth and adoption of River API.
Added 4 hours ago
Mechanical Engineer
Eichleay Main Career Page
Ferndale, WA
Assure all mechanical engineering designs meet applicable codes and standards including company standards, API, ASME as well as others used in static and rotating equipment mechanical…
Added 4 hours ago
M
Product Manager II, Maps AI
Mapbox
Remote, United States
- $150,025 to $202,975 USD / year
…experiences within the apps and products people use every day. As the developer platform for live location, we’re evolving how people interact with maps and location data, including…
Added 4 hours ago
FHIR Software Engineer IV
Availity
Remote, United States
Added 4 hours ago
Principal AI Architect
Innovation Associates, Inc.
United States
Track record of modernizing a large, revenue-bearing platform (monolith decomposition, re-platforming, API and event architecture) while it stayed in service.
Added 4 hours ago
Mid-Level Java API Developer
System One
Pittsburgh, PA
Collaborate with development teams to build and enhance API features at scale.
Added 4 hours ago
Prophet 21 Systems Analyst
The Planet Group
Michigan, MI
Experience with the P21 API, SQL Server stored procedures, or integrations between P21 and other business systems.
Added 4 hours ago
PD
Senior DevSecOps Engineer
Pantheon Data
Reston, VA
- $145,000 to $200,000 USD / year
…scanning, container scanning, IaC scanning, license compliance, and API security - with findings triaged through the vulnerability management dashboard and merge request security…
Added 4 hours ago
PD
Senior AI Engineer (Agentic Systems)
Pantheon Data
Reston, VA
- $120,000 to $220,000 USD / year
Strong Python engineering skills: readable, maintainable, tested code; debugging; packaging; and API and service design.
Added 4 hours ago
Senior Manager - Product Partnerships
GoDaddy
United States
Technical fluency: you can hold your own in an API and architecture conversation, and you understand the agent/AI ecosystem (MCP, LLM platforms, agentic workflows) well enough to spot real…

System One

Mid-Level Java API Developer

Pittsburgh, PA, United States

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Job details

Apply by: Jan 31, 2027
Posting language: English
Posted: Nov 2, 2026

Original job description

Job Title: Mid- Level Java API Developer Location: Pittsburgh, PA Type: Permanent Full Time Work Model: Onsite

Responsibilities

Design, develop, maintain, and implement APIs, microservices, and backend components.
Collaborate with development teams to build and enhance API features at scale.
Improve API standards, performance, and service quality.
Develop and unit test Java-based RESTful services that integrate with external systems.
Utilize DevOps tools including Jenkins, uDeploy, Git, and CI/CD pipelines.
Review technical design documents and provide feedback on solutions, estimates, and implementation approaches.
Create technical designs for new applications and enhancements to existing systems.
Translate business and functional requirements into scalable system designs.
Prioritize work effectively and meet project deadlines.
Collaborate closely with business stakeholders, architects, developers, and external partners.
Research and recommend frameworks, libraries, and tools to streamline development efforts.
Participate in Agile development processes and code reviews.

Requirements

4+ years of experience in Java/J2EE development.
Strong experience with REST APIs, Spring Boot, Spring Framework, XML, JSON, and Swagger/OpenAPI.
4+ years of experience developing and consuming SOAP and REST web services in production environments.
Experience building APIs and microservices in large-scale enterprise environments.
Experience with OpenShift, containerization, and microservices architecture.
3+ years of experience using GitHub, Jenkins, and CI/CD tools.
Knowledge of front-end technologies such as Node.js and Angular (version 8+ preferred).
Experience with Kubernetes, Apache Kafka, and MongoDB.
Experience integrating Java applications with Oracle and/or SQL Server databases.
Hands-on experience developing secure REST APIs and implementing application security best practices.
Strong understanding of software development lifecycle methodologies and Agile practices.
Excellent collaboration, communication, and problem-solving skills.
Strong verbal and written communication skills.

Preferred Skills

Enterprise application development experience.
Experience working in highly regulated or large-scale environments.
Strong troubleshooting and performance optimization capabilities.
Exposure to cloud-native technologies and modern application architecture patterns.

System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

#LI- Ref: #404-IT Pittsburgh

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