Java Developer - Integration
abacus-consulting-3 · Lahore, Pakistan ·
- Employment
- Full time
- Category
- Software engineering
- Experience
- 3+ years
abacus-consulting-3 · Lahore, Pakistan ·
Abacus Consulting · Lahore, Pakistan
Abacus Consulting · Lahore, Pakistan
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Embark GCC · Trivandrum, India
Java backend developer (3-5 yrs) on an integration team building scalable microservices and RESTful APIs for telecom (OSS/BSS) and fintech (Open Banking/PSD2) solutions. Core stack: Java/Spring Boot, API gateways (Apigee/Kong/MuleSoft), OAuth2/OIDC security, Kafka/RabbitMQ, and cloud (AWS/Azure/GCP).
Location: Lahore| Type: Full-Time
We are looking for a talented Java Developer with 3-5 years of experience to join our integration team working on cutting‑edge solutions in the telecommunications and fintech industries. You will contribute to the design and development of robust backend systems and APIs while gaining exposure to industry standards such as TM Forum Open APIs and Open Banking frameworks.
Develop and maintain scalable backend systems and microservices using Java (Spring Boot).
Build and consume RESTful APIs, aligning with best practices and industry standards such as TM Forum Open APIs or Open Banking (PSD2).
Collaborate in the design and implementation of API gateway policies (rate limiting, caching, authentication) using tools like Apigee, Kong, or MuleSoft.
Integrate OAuth2.0 and OpenID Connect for secure API authentication.
Work with Identity Providers such as Okta, Azure AD, or Ping Identity to support secure access flows.
Support the implementation of data privacy and consent management practices in line with regulations like GDPR.
Contribute to development of Java components for telecom systems like OSS/BSS, SIM lifecycle, or partner API integrations.
Support interfaces related to banking services like KYC, account aggregation, or payment initiation.
Support deployment and monitoring of applications in cloud environments (AWS, Azure, or GCP).
Work with event‑driven architectures, Kafka or RabbitMQ, and assist in CI/CD processes.
Collaborate with architects, QA, and DevOps to deliver secure and scalable services.
Participate in code reviews, sprint planning, and document solutions for internal and external stakeholders.
3-5 years of experience in Java backend development (Spring Boot / Jakarta EE).
Strong understanding of RESTful APIs and integration patterns.
Familiarity with telecom (OSS/BSS) or fintech (Open Banking, PSD2) domains is a plus.
Exposure to API security protocols (OAuth2, OIDC) and cloud platforms.
Good communication and problem‑solving skills; team player with a proactive mindset.
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