Java Backend Developer

OBSS; Fatih; On-site; TRY 420,000 - 660,000; Full time

Job summary

OBSS, Turkey’s largest technology consultancy, seeks a Senior Java Backend Developer with Oracle PL/SQL and Oracle Forms expertise to join our international projects team in banking transformation initiatives.

You will design, build, and maintain secure backend software, leveraging Java, Spring, IBM BAW, and REST/SOAP APIs, collaborating with global teams on end-to-end digital banking solutions.

Qualifications

• Bachelor’s degree in Computer Engineering, Computer Science, Software Engineering or related field.
• Minimum 5 years of backend software development experience, preferably in banking transformation projects.
• Mandatory hands-on experience with Java, Oracle PL/SQL, and Oracle Forms.
• Solid backend development background with Spring Framework, JPA/Hibernate, and relational databases.
• Experience with BPM tools, specifically IBM BAW (Business Automation Workflow).

Responsibilities

• Design, develop, and maintain secure, scalable banking-related backend software solutions for international projects.
• Implement backend Java applications with core database logic using Oracle PL/SQL and Oracle Forms.
• Design workflow applications using BPM tools like IBM BAW for process-driven development.
• Integrate back-end services, databases, and client systems via REST and SOAP APIs.
• Apply design patterns and microservices principles to ensure security and performance.
• Maintain thorough technical documentation of backend solutions.
• Collaborate with cross-functional teams on end-to-end banking applications.

Skills

Java

Oracle PL/SQL

Oracle Forms

Spring Framework

IBM BAW

REST & SOAP APIs

Microservices

Software architecture

English

Education

Bachelor’s degree in Computer Engineering/CS/SE

Tools

Git

Jira

TFS

ClearCase

Docker

AWS

Job description

OBSS is Turkey’s largest technology consultancy, pioneering product development and technology consulting for an AI-native future. With more than 20 years of experience and offices in London, Istanbul and Ankara, we empower leading companies in banking and finance, insurance, e-commerce, retail, and the start-up ecosystem. Our team of over 1000 talented professionals thrives on collaboration, innovation, and continuous learning.

We are now looking for a Senior Java Backend Developer with strong Oracle PL/SQL and Oracle Forms experience to join our international projects team and contribute to building high-quality, end-to-end digital solutions for global banking transformation projects.

As a Senior Java Backend Developer, you will work on rewarding, large-scale international projects to design, build, and maintain innovative backend software solutions for the banking sector. You will play a key role in core banking transformation initiatives, combining modern Java architectures with legacy database and forms capabilities while working alongside global project teams.

Main Responsibilities

• Design, develop, and maintain secure, compliant, and scalable banking-related backend software solutions for international projects.
• Implement robust back-end Java applications alongside core database logic using Oracle PL/SQL and Oracle Forms.
• Design workflow applications and process-driven backend solutions using BPM tools, specifically IBM BAW (Business Automation Workflow).
• Integrate back-end web services, databases, and client systems via REST and SOAP APIs.
• Apply advanced design patterns and microservices architecture to ensure high scalability, security, and performance.
• Create standard-compliant, secure backend code and maintain comprehensive technical documentation.
• Collaborate with cross-functional international teams to deliver end-to-end digital banking applications.

Qualifications / Technical Skills

• Bachelor’s degree in Computer Engineering, Computer Science, Software Engineering, or a related field.
• Minimum 5 years of backend software development experience, preferably within the banking sector (experience in banking transformation projects is a strong plus).
• Mandatory hands‑on experience and deep expertise in Java, Oracle PL/SQL, and Oracle Forms.
• Solid background in back‑end development using Spring Framework (MVC, Boot, Data), JPA, Hibernate, and relational databases (Oracle DB, MSSQL, PostgreSQL).
• Practical experience in workflow design and process‑based development on BPM tools, specifically IBM BAW (Business Automation Workflow).
• Strong command of enterprise management and version control tools (Git, Jira, TFS, ClearCase, etc.).
• Familiarity with containerization and cloud environments such as Docker and AWS.
• Excellent command of English (both written and spoken) for active participation in international project environments.
• Strong communication, analytical thinking, research mindset, and problem‑solving capabilities in a dynamic, collaborative team environment.
• Ability to approach AI with curiosity and intention, actively incorporating AI-powered tools into workflows to enhance productivity and drive innovation.