Full Stack developer

American Express Global Business Travel; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

American Express Global Business Travel is seeking an experienced Java backend engineer to build and maintain scalable APIs and services in a distributed environment. You will work with Spring Boot, Docker, Tomcat, OpenShift, and Kafka to ensure robust data exchanges and reliable deployments.

You will mentor peers, participate in migrations to newer JDK versions, and contribute to architecture standards and documentation for cross-functional teams.

Qualifications

• 5+ years of hands-on Java development with modern JDKs (11/17).
• Experience building REST/SOAP APIs and SOA/web services.
• Proficiency with CI/CD tooling and Unix/Linux operations.
• Knowledge of Kafka, XML/JSON data exchanges, and XSLT.
• Familiarity with Tomcat and containerized deployments on OpenShift.

Responsibilities

• Build, develop, and maintain Java-based services/APIs in a multi‑tier architecture.
• Develop Spring Boot apps with Docker/Tomcat/OpenShift deployments.
• Support integrations using Kafka and messaging patterns.
• Work with PostgreSQL/SQL Server and NoSQL databases; optimize schemas.
• Lead/mutate migrations (JDK 8/11 → 17) for performance and security.
• Set up CI/CD pipelines (Maven, GitHub, Jenkins, Nexus) and automate builds.
• Document decisions and collaborate across cross-functional teams.
• Mentor teammates and drive development best practices.

Skills

Java development

REST APIs

SOAP/Web Services

CI/CD

Unix/Linux

Docker/OpenShift

Tomcat

Kafka

XML/JSON

XSLT

SQL/NoSQL databases

Tools

Maven

GitHub

Jenkins

Nexus

Docker

OpenShift

Job description

• Build, develop, and maintain Java-based services/APIs (REST/SOAP) and SOA/web services in a distributed, multi-tier architecture, managing XML and JSON data exchanges.
• Develop and maintain Spring Boot applications with containerized deployments on Docker, Tomcat, and OpenShift using strong Unix/Linux operational skills.
• Support and implement integrations using Kafka and various queuing or messaging approaches.
• Work with relational databases (Postgres, SQL Server) and NoSQL databases, including XML data handling, schema design, and query optimization.
• Participate in or lead Java migration/upgrade efforts (JDK 8/11 → JDK 17), ensuring compatibility, performance, and security.
• Build and maintain CI/CD pipelines and automation (Maven builds, GitHub workflows, Jenkins jobs, artifact publishing to Nexus).
• Integrate with communication platforms including SMS providers (Syniverse/Twilio), email delivery platforms (SparkPost), and security integrations (Proofpoint/DMARC).
• Collaborate with multi-functional teams to develop clear user documentation and communicate status, risks, and build decisions.
• Fix and support applications across multiple runtime environments and deployment platforms.
• Mentor team members and contribute to continuous improvement of development practices and architecture standards.

What We're Looking For

• 5+ years of extensive hands-on Java development experience, including JDK 11 and/or JDK 17 (beyond Java 8), with strong object-oriented design and coding skills.
• Experience building and integrating APIs and services using REST, SOAP/Web Services, SOA, XML, and JSON data formats.
• Advanced XML transformation experience with XSLT programming skills.
• Knowledge of distributed systems concepts including multi-tier architecture, algorithms, and messaging/queuing patterns.
• Hands-on experience with CI/CD tooling (Maven, GitHub, Jenkins, Nexus or equivalent) along with applied Unix/Linux command knowledge for production troubleshooting.
• Experience with application servers (Apache Tomcat) and containerization platforms (Docker and OpenShift).
• Demonstrated ability to work across multiple databases including relational (Postgres, SQL Server) and NoSQL solutions.
• Experience integrating with SMS and email communication platforms, including delivery callbacks, templates, compliance, and security protocols.
• Strong communication and collaboration skills with ability to document technical decisions and manage cross-functional projects.

Preferred Qualifications

• Direct experience on JDK migration projects (JDK 8/11 → JDK 17) including compatibility, dependency upgrades, testing, and performance tuning.
• Production-level expertise with Kafka (streams, consumer groups, retries/DLQ patterns, schema evolution) and hands‑on experience with SMS/email platform integrations (Syniverse, Twilio, SparkPost, Proofpoint/DMARC).
• Cloud depth in AWS (networking, IAM, monitoring/logging, scaling, cost awareness) and production OpenShift operations, plus HTML email template design and SMTP workflow expertise.