Solution Architect Java / Integration

abacus-consulting-3; Lahore; On-site; PKR 3,000,000 - 5,400,000; Full time

Job summary

Abacus Consulting seeks a Senior Java Developer to design and implement robust integration solutions for telecom and fintech sectors. You will work with Java, Spring Boot, API engineering, and security protocols, including TM Forum Open APIs and Open Banking.

Responsibilities include building microservices, API gateways, IdP integrations, and cloud-native or hybrid architectures. Strong focus on OSS/BSS, PSD2/GDPR compliance, and cross-functional collaboration.

Qualifications

• 8-10 years minimum hands-on Java development experience in large-scale integration projects.
• Proficient in Spring Boot, REST API development, and API gateway patterns.
• Proven industry experience in telecom (OSS/BSS) and/or fintech/banking integration.
• Hands-on experience with OAuth2, OpenID Connect, and API security frameworks.
• Familiarity with GDPR, PCI-DSS, PSR, and regional data protection laws.
• Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
• Strong communication and documentation skills.

Responsibilities

• Design, develop, and maintain scalable backend systems and microservices using Java (Spring Boot, Jakarta EE).
• Build and expose RESTful APIs aligned with TM Forum Open APIs and Open Banking specs.
• Lead the development of API gateway policies using Apigee, Kong, or MuleSoft.
• Implement secure authentication and authorization with OAuth2.0, OpenID Connect, and IdPs.
• Ensure APIs comply with Consent Management and data privacy mandates.
• Develop OSS/BSS modules, SIM lifecycle management, and partner APIs in telco.
• Translate PSD2, GDPR into compliant technical implementations.
• Design cloud-native or hybrid Java solutions in multi-region environments.
• Collaborate with DevOps for CI/CD, scalability, and fault tolerance.
• Prepare technical documentation and developer guides; present to stakeholders.

Skills

Java development

Spring Boot

REST API development

OAuth2/OpenID Connect

API security

Telco OSS/BSS experience

Fintech/banking integration

Cloud platforms (AWS/Azure/GCP)

Docker/Kubernetes

API gateway patterns

Communication skills

Tools

Apigee

Kong

MuleSoft

Okta

Azure AD

Ping Identity

Kafka

RabbitMQ

Docker

Kubernetes

AWS

Azure

GCP

Job description

Job Summary:

We are seeking a highly skilled and experienced Senior Java Developer with deep expertise in designing and implementing robust integration solutions for the telecommunications and fintech sectors. The ideal candidate will have a strong command of modern Java-based development, API architecture, and security protocols, along with a solid understanding of industry-specific standards such as TM Forum Open APIs and Open Banking frameworks.

Java Development & API Engineering

• Design, develop, and maintain scalable backend systems and microservices using Java (Spring Boot, Jakarta EE).

• Build and expose RESTful APIs aligned with TM Forum Open APIs (TMF), CAMARA standards, and Open Banking specifications (UK/PSD2).

• Lead the development of API gateway policies (throttling, caching, quota) using platforms such as Apigee, Kong, or MuleSoft.

Security & Identity Integration

• Implement secure authentication and authorization flows using OAuth 2.0, OpenID Connect, and integrate with IdPs like Okta, Azure AD, or

• Ping Identity.

• Ensure APIs are compliant with Consent Management and data privacy mandates.

Domain Expertise: Telco & Fintech

• Build and integrate Java modules for OSS/BSS systems, SIM lifecycle management, provisioning, and partner APIs in telco ecosystems.

• Develop interfaces for banking platforms including KYC/AML workflows, account aggregation (AIS), and payment initiation (PIS).

• Translate regulatory requirements (e.g., PSD2, GDPR) into compliant technical implementations.

Cloud & Architecture

• Design cloud-native or hybrid Java-based solutions in multi-region/multi-tenant environments.

• Work with event-driven architectures, message queues (Kafka, RabbitMQ), and integration platforms (iPaaS).

• Collaborate with architects and DevOps teams to ensure CI/CD, scalability, and fault tolerance.

Collaboration & Documentation:

Deliver high-quality technical documentation, solution blueprints, and developer guides.

• Present solutions to technical and non-technical stakeholders, participating in sprint planning and reviews.

Key Requirements:

• 8-10 years minimum hands-on Java development experience in large-scale integration projects.
• Proficient in Spring Boot, REST API development, and API gateway patterns.
• Proven industry experience in telecom (OSS/BSS) and/or fintech/banking integration.
• Hands‑on experience with OAuth2, OpenID Connect, and API security frameworks.
• Familiarity with compliance requirements like GDPR, PCI-DSS, PSR, and regional data protection laws.
• Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).

• Strong communication and documentation skills.