Jobs in the United States

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Added 2 days ago
Mid-level Back-End Software Engineer (TS/SCI)
Vantor Services Inc.
Herndon, VA · Westminster, CO
API and System Integration: Develop and maintain RESTful APIs and service interfaces to facilitate integration between data platforms, applications, databases, and external systems.
Added 2 days ago
Mid-level Full Stack Software Engineer (TS/SCI)
Vantor Services Inc.
Herndon, VA · Westminster, CO
Back-End Services and API Development: Develop and maintain RESTful APIs, microservices, and database integrations to support efficient data access, querying, processing, and application…
Added 2 days ago
ANR - Mid Developer - IE Web
Shee Atika Government Services Careers
Remote, United States
Alaska Northstar Resources (ANR) is seeking a Mid Developer to join our cloud computing team on a very exciting government program. This is a fully remote role, and the duties and…
Added 2 days ago
Java Developer – Spring Boot Microservices, Kafka & Cloud
MaxIT Consulting - Max Corporate Group
New York · New York, NY
New York City, NY or Salt Lake City, UT | On-site | Full-Time | Permanent Employment | Mid-Senior Level | ASAP Start
Added 2 days ago
Java Software Engineer / Backend Developer
MaxIT Consulting - Max Corporate Group
New York · New York, NY
New York City, NY or Salt Lake City, UT | On-site | Full-Time | Permanent Employment | Mid-Senior Level | ASAP Start
Added 3 days ago
Mid-Level Java API Developer
System One
Pittsburgh, PA
Collaborate with development teams to build and enhance API features at scale.
Added 3 days ago
Senior Quality Assurance (QA) Software Engineer
Camgian Corporation
Huntsville, AL
…in an engineer who built a strong foundation as a software developer and deliberately chose to focus on software quality because they value the investigative, systems-oriented work of…
Added 3 days ago
J
Principal Systems Engineer
Jobot
Gaithersburg, MD
- $140,000 to $175,000 USD / year
Software Developer – Senior, Lead & Principal Levels
Added 3 days ago
Software Dev Engineer II, NASC Tech
Amazon.com Services LLC
Bellevue, WA
…direction of platforms that connect long-term strategic planning, mid-term optimization, and short-term operational execution into a unified ecosystem. Our vision is to move beyond…
Added 3 days ago
Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
5+ years of full-stack development (Java, .NET, Python, React, Angular or Node.js) (Mid / Level II / “Journeyman”).
Added 3 days ago
Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
5+ years of full-stack development (Java, .NET, Python, React, Angular or Node.js) (Mid / Level II / “Journeyman”).
Added 3 days ago
Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
5+ years of full-stack development (Java, .NET, Python, React, Angular or Node.js) (Mid / Level II / “Journeyman”).
Added 3 days ago
Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
5+ years of full-stack development (Java, .NET, Python, React, Angular or Node.js) (Mid / Level II / “Journeyman”).
Added 3 days ago
Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
5+ years of full-stack development (Java, .NET, Python, React, Angular or Node.js) (Mid / Level II / “Journeyman”).
Added 4 days ago
Margin Java Tech Lead, Senior Vice President
Citigroup
Jersey City, NJ
We’re currently looking for a high caliber professional to join our team as Margin Java Tech Lead – SVP – C14 based in Jersey City or Tampa.
Added 4 days ago
Senior Software Engineer Technical Remediation & Enablement
Citigroup
New York, NY
…remediation), managing transitive dependency conflicts, breaking API changes, and version incompatibilities across Java, Python, Go, .NET, or JavaScript/TypeScript…
Added 5 days ago
BA
Full Stack Developer, Mid
Booz Allen Hamilton
Aurora, CO
- $69,400 to $158,000 USD / year
Implement endtoend features across modern frontend frameworks, such as React, Angular, or Vue, and backend microservices, including Python, Java, or Node.js.
Added 5 days ago
BA
Full Stack Developer, Mid
Booz Allen Hamilton
Aurora, CO
- $69,400 to $158,000 USD / year
Implement endtoend features across modern frontend frameworks such as React, Angular, or Vue, and backend microservices such as Python, Java, or Node.js.
Added 5 days ago
Senior Backend Engineer - AI Platform
WEX INC.
SALT LAKE CITY, UT
Added 5 days ago
AE
Sr Software Engineer I
American Express
New York, NY
- $123,000 to $215,250 USD / year
American Express is looking for a highly skilled, hands-on Senior Java Software Engineer to join the Enterprise Identity Team , focused on delivering secure, scalable, and reliable Identity…
Added 5 days ago
Data Engineering Technical Leader - CX AI
Cisco Systems, Inc.
San Jose, CA
API & Service Integration: Define high-performance API contracts (REST, GraphQL) and backend microservices that expose trusted datasets and metrics for self-service reporting and AI…
Added 6 days ago
MC
Software Developer / Programmer – Contract (Raleigh, NC)
Mfinite Consulting
Raleigh · Raleigh, NC
- $60 to $71 USD / hour
1–3+ years of professional development experience (Mid-Level 3–5 years, Senior 5–7, Expert 7+)
Added 6 days ago
Margin Java Tech Lead, Senior Vice President
Citibank, N.A.
United States
We’re currently looking for a high caliber professional to join our team as Margin Java Tech Lead – SVP – C14 based in Jersey City or Tampa.
Added 6 days ago
Senior Software Engineer Technical Remediation & Enablement
Citibank, N.A.
United States
…remediation), managing transitive dependency conflicts, breaking API changes, and version incompatibilities across Java, Python, Go, .NET, or JavaScript/TypeScript…
Added 6 days ago
Senior Applications Developer
Bexar County
United States
Senior Applications DeveloperPay Rate Min to Mid Range

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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More about this job

Skills

Oracle Java
Microservices
DevOps
Jenkins
Git
CI/CD
Research
Agile development
API development
Spring Boot
Spring Framework
Red Hat OpenShift
Microservices Architecture
GitHub
Node.js
Kubernetes
Apache Kafka
MongoDB
Oracle
Microsoft SQL Server
Software development
Agile
Collaboration
Communication skills
Problem solving
Troubleshooting

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