Java Engineer

Upcom; Kentucky; Hybrid; USD 110,000 - 140,000; Full time

Benefits offered by this job

Hybrid working

Private insurance

Wellness platform access

Continuous learning

Cutting-edge technologies

Job summary

Upcom is seeking a skilled Java Back-End Developer for a hybrid project with a leading energy sector client. You will design and build backend microservices using Java 21 and Spring Boot, and create RESTful APIs with clear error handling and OpenAPI documentation.

You will implement gRPC services, leverage Kafka for event-driven architecture, and integrate with systems like Salesforce and SAP ISU. Security is key with OAuth2/OIDC and RBAC, plus extensive testing and Agile practices.

Qualifications

• Bachelor's degree in CS, engineering, or related field.
• 3–5+ years of backend development experience.
• Strong Java (preferably Java 21) and Spring Boot experience.
• Experience with Kafka-based event-driven architectures.
• Familiarity with Docker, Kubernetes, and cloud-native tooling.
• Knowledge of OAuth2/OIDC and RBAC for security.
• Experience with unit/integration testing (JUnit 5, Mockito).
• Experience working in Agile environments.

Responsibilities

• Design and develop backend microservices using Java 21 and Spring Boot.
• Build RESTful APIs with OpenAPI/Swagger docs and error handling.
• Implement gRPC services and Protobuf schemas.
• Develop event-driven solutions with Kafka consumers/producers.
• Integrate with external systems (Salesforce, SAP ISU, etc.).
• Ensure secure auth via OAuth2/OIDC with RBAC.
• Write unit/integration tests and perform code reviews.
• Collaborate with DevOps on Docker/Kubernetes deployments.
• Adhere to regulatory requirements and anti-bribery policies.

Skills

Backend development

Agile methodology

Unit/integration testing

Security concepts

Education

Bachelor's degree in Computer Science or related field

Tools

Java 21

Spring Boot

Kafka

PostgreSQL

Azure Cosmos DB

Redis

Docker

Kubernetes

OAuth2/OIDC

RBAC

JUnit 5/Mockito/Testcontainers

gRPC/Protobuf

OpenAPI/Swagger

Job description

We are seeking a skilled and experienced Java Back-End Developer to join our team on a hybrid project on behalf of one of our largest clients in the energy sector.

Your responsibilities will entail:

• Design and develop backend microservices using Java 21 and Spring Boot 3.x;
• Build and maintain RESTful APIs with clear error handling and documented OpenAPI/Swagger specifications;
• Implement gRPC services and clients, including Protobuf schema design;
• Develop event-driven solutions using Apache Kafka consumers and producers;
• Integrate backend services with external systems (OIC, Salesforce, SAP ISU);
• Implement authentication and authorization using OAuth 2.0 / OIDC, including token validation and role-based access;
• Write unit and integration tests using JUnit 5, Mockito, and Testcontainers;
• Collaborate with DevOps teams on containerized deployments in Docker and Kubernetes;
• Ensuring that all activities and duties are carried out in full compliance with regulatory requirements and supporting the continued implementation of the Group Anti-Bribery and Corruption Policy.

Requirements

• University degree in Computer Science, Engineering, or a related field;
• 3–5+ years of experience in backend development;
• Strong hands‑on experience with Java (preferably Java 21) and modern language features;
• Proven experience with Spring Boot (microservices, REST controllers, data access layers, security);
• Experience migrating applications from older Java versions (e.g., Java 11);
• Solid knowledge of Kafka-based event-driven architectures;
• Experience with PostgreSQL, Azure Cosmos DB, and Redis;
• Good understanding of containerization (Docker) and Kubernetes fundamentals;
• Strong understanding of backend security concepts (OAuth2, OIDC, RBAC);
• Experience writing automated tests at unit and integration level;
• Experience working in an Agile environment;

Nice to Have

• Integration experience with Confluent Kafka or Azure Event Hubs;
• Exposure to AKS environments;
• Previous work with enterprise integrations (Salesforce, SAP ISU);
• Familiarity with cloud-native observability tools;
• Familiarity with Azure DevOps.

Benefits

• Privateinsurance
• Hybrid working Model
• Unlimitedfreeaccesstowellnessworkplacesupportplatform
• Adynamicchallengingenvironmentresultingincontinuouslearning/education/progression
• Abilitytoworkwithcuttingedgetechnologies
• Pleasantworkingenvironment

UpcoMindsisadynamicITcompanywith28yearsofexperiencethatprovidesend-to-endwebandmobilesolutionshelpingbusinessestoreinventthemselvesinthedigitalworld.Ourteam’sskillsandexpertisewillensuretheholisticdigitaltransformationofanyorganization,whichwillconsiderablyimprovebothbusinessoperationsandcustomer’sexperience.

Ourgoalistoalwayshaveourendproductsandservicesreflectourdeepengineeringskillsandelegantprogressivedesignaesthetic.Wefundamentallybelievedeeplyindevelopinglongtermstrategicpartnershipswithourclientsbyexceedingexpectationsandmaintainingahighleveloftransparency.

Findoutmoreaboutusat www.upcominds.com

WecommittopromoteInclusion&Diversitybycreatingaworkingenvironmentwhereallemployeesaretreatedwithdignityandrespectandwhereindividualdifferencesarevalued.Weofferequalopportunityinallaspectsofemployment.