Weekend Java Jobs in Troy, MI (NOW HIRING)

Software Engineer
Java • Spring Boot • Connected Services
Engineering | Full-time | Onsite |
Overview
We are looking for a skilled Java Engineer to design and deliver scalable, cloud-native microservices within our Connected Services platform. You will own the full software lifecycle - from architecture through deployment - building robust APIs and event-driven systems that power real-time device and data integrations.
Responsibilities
• Design and develop RESTful and event-driven microservices using Java 17+ and Spring Boot 3
• Build and maintain integrations with IoT devices, third-party APIs, and connected platforms
• Implement messaging pipelines with Kafka or RabbitMQ for real-time data streaming
• Write clean, testable code with JUnit, Mockito, and integration test suites
• Collaborate with product and DevOps on CI/CD pipelines (Docker, Kubernetes, Helm)
• Participate in architecture reviews and define best practices for the team
Required Skills
• Experience with Java (Java 17+ preferred) and Spring Boot ecosystem
• Strong knowledge of Spring Cloud, Spring Security, and Spring Data JPA
• Experience with Kafka, RabbitMQ, or similar messaging technologies
• Familiarity with OAuth 2.0, JWT, and API security patterns
• Proficient with SQL/NoSQL databases (PostgreSQL, MongoDB, Redis)
• Hands-on with Docker and Kubernetes in cloud environments (AWS, GCP, or Azure)
Nice to Have
• Experience with MQTT, AMQP, or CoAP for IoT device communication
• Knowledge of OpenAPI / Swagger specification and contract-first design
• Exposure to service mesh (Istio, Linkerd) and observability tooling
• Contributions to open-source Java or Spring Boot projects
Job Posting
About Us:
Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant, a member of the NASDAQ-100, is ranked 195 on the Fortune 500 and is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital at www.cognizant.com .
About Cognizant's IoT Practice:
Intelligent, IoT-enabled products will soon result in the proliferation of data and disrupt virtually all industries. To be successful, both large and small companies must leverage IoT capabilities by designing modern products that fundamentally connect people with processes. Within Cognizant IOT, we engineer industry-aligned, IoT-enabled products that merge industry needs with human drivers. Our intelligent products will revolutionize experiences and result in exciting, transformative outcomes. Without human-centered thinking, connected products are just standalone things-but with it, our modern connected products facilitate a unified way of life enjoyed by all.
Salary and Other Compensation:

• The annual salary for this position is between $74,000 - $84,000 + Bonus depending on experience and other qualifications of the successful candidate.
  This position is also eligible for Cognizant's discretionary annual incentive program, based on performance and subject to the terms of Cognizant's applicable plans.
  Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:

• Medical/Dental/Vision/Life Insurance
• Paid holidays plus Paid Time Off
• 401(k) plan and contributions
• Long-term/Short-term Disability
• Paid Parental Leave
• Employee Stock Purchase Plan
  Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*

• Applications will be accepted until July 2nd , 2026
• LI#- #LI-SC6

About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization's unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] for roles based in the Americas or [email protected] for roles based in India.