Senior Java Application Architect
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Job Location:
Johannesburg - South Africa
Monthly Salary:
Not Disclosed
Posted on:
4 days ago
Vacancies:
1 Vacancy
Job Summary
We are looking for a hands-on Senior Java Application Architect to lead the planning architecture design and development of a payment gateway. This is a high-impact role where you will build a solution on Google Cloud (GCP) designated for rollout across Africa and international markets!
You will own the end-to-end architecture with a strong emphasis on security compliance (PCI POPIA/GDPR) and operational observability. This is not just a diagramming role; you will lead the Java implementation while ensuring the platform delivers low-latency high-throughout transaction processing.
Key Outcomes You Will Drive:
- Architect a PCI-aligned low-latency payment gateway on GCP with clear SLIs/SLOs
- Deliver production integrations with external providers including mobile-money services (e.g. Tigo Pesa M-Pesa Airtel Money) and MNO/banking APIs.
- Design scalable microservices ready for multi-region expansion (ZA/EU/UK) with robust reconciliation idempotency and retries
- Embed PCI DSS controls tokenization and key management while preparing for PSD2/UK requirement
The Tech Stack:
You must have production experience with the following technologies:
- Java 17 Spring Boot/Spring Cloud JPA/Hibernate (Reactive/WebFlux is a plus)
- OAuth2/OIDC mTLS HMAC API policy enforcement
- Cloud Run (Primary Runtime) and/or GKE Autopilot
- Cloud SQL (MySQL/Postgres) AlloyDB Memorystore (Redis) BigQuery
- Pub/Sub Dataflow
CI/CD (Cloud Build/GitHub Actions) Terraform (IaC)
Who We Are Looking For:
- 810 years in Java engineering with 35 years as an Application/Domain Architect in payments or fintech.
- You have built or significantly evolved a payment gateway acquiring platform or wallet/PSP system.
- Experience with wallet/mobile money flows (e.g. M-Pesa Tigo Pesa) regarding KYC float and settlement is strongly preferred.
- Proven production experience on GCP.
- Deep understanding of high-availability traffic shaping circuit breakers saga/outbox patterns and event-driven systems.
Required Experience:
Senior IC
Key Skills
- Junit
- General Ledger Accounting
- End User Support
- JQuery
- Blackberry
About Company
CloudSmiths is a tech consultancy with a special focus on data analytics, machine learning, cloud infrastructure and business reporting. We are the largest Salesforce integrator in Africa and specialised Google Cloud, Microsoft Azure and AWS partners.
