AI Summary
Implement Temporal workflow activities in Go, build and validate unit tests, and develop REST API endpoints for Inventory DB. Support Sr. Developer on workflow development tasks and write integration tests. Load and stress testing, test automation, and CI pipeline integration are also required.
Key Highlights
Implement Temporal workflow activities in Go
Build and validate unit tests
Develop REST API endpoints for Inventory DB
Key Responsibilities
Implement Temporal workflow activities in Go
Build and validate unit tests for all workflow activities
Build the Inventory Management Database
Implement REST API endpoints for Inventory DB
Write integration tests
Support Sr. Developer on all workflow development tasks
Load and stress testing
Test automation
CI pipeline integration
Technical Skills Required
Benefits & Perks
Fully remote
Exciting and challenging greenfield platform
Opportunity to join a team of highly professional specialists
Nice to Have
Temporal engine experience
Telecom or BSS/OSS background
Test framework experience
Load testing tools
Docker experience
Event-sourced or append-only database patterns
Job Description
- Implement Temporal workflow activities in Go: HSS adapter, PCRF adapter, Inventory update.
- Build and validate unit tests for all workflow activities from day one.
- Build the Inventory Management Database: tables, indexes, partitioning for 30M records.
- Build bulk import tooling: CSV → ICCID/IMSI/MSISDN range ingestion from vendor.
- Implement REST API endpoints for Inventory DB (allocate, reserve, release, query SIM records).
- Write integration tests: workflow → mock NE → database assertions.
- Support Sr. Developer on all workflow development tasks — pair programming expected.
- End-to-end test suite: full provisioning flow from SIM activation to order closed.
- Load and stress testing: simulate peak TPS provisioning against all systems.
- Test automation: CI pipeline integration for all workflow and API tests.
- HSS sync integration: IMSI allocation state reflected in HSS (mock → real NE).
- MNP (number portability) hooks in Inventory DB.
- UAT support: reproduce bugs, write regression tests, validate fixes.
Must Have
- 2–4 years backend software development in production environments.
- Go or Java — primary development language for this role is Go.
- Java accepted if strong fundamentals and willing to work in Go (we will support the transition).
- REST API development — building APIs consumed by other services and tested by automated suites.
- PostgreSQL — table design, indexes, writing queries, understanding query plans .
- Unit and integration testing — writing tests is a first-class responsibility, not an afterthought.
- Git — branching, pull requests, code review participation.
- Experience with event-driven architectures using RabbitMQ, Kafka, or Redis Pub/Sub.
- Basic Kubernetes knowledge — understanding how your workloads are deployed.
- Ability to work under technical direction of a senior lead and execute quickly.
- Fluent English.
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- * Any workflow engine experience: Temporal, Camunda, Apache Airflow, AWS Step Functions.
- * Telecom or BSS/OSS background — understanding of SIM lifecycle, provisioning, activation.
- * Test framework experience: Go testing, Testify, mock frameworks.
- * Load testing tools: k6, Locust, JMeter — running and interpreting results.
- * Docker — building and running containerised services.
- * Experience with event-sourced or append-only database patterns.
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- Temporal.io SDK experience — even personal/side project counts.
- Python — useful for scripting, test tooling, data processing.
- Prometheus — understanding how to instrument code with metrics.
- Telecom protocol familiarity: Diameter, SS7, SMPP.
Founded in early 2010, Webbing is a global data MVNO that delivers enterprise grade, global connectivity and IoT services across more than 200 countries and 600+ mobile carriers' networks. Webbing's secured network delivers network protection and web content intelligence.
Enterprise customers can manage, monitor, and optimize data usage in real-time with Webbing's powerful software platform. Gain visibility by application type and have the power to white list applications and limit non-business applications with the click of a button, saving money and improving compliance.
What we offer:
- Fully remote
- An exciting and challenging greenfield platform with great skill and knowledge development opportunities.
- The opportunity to join a team of highly professional specialists in an international environment.
- The opportunity for professional development within a reputable international innovative and growing company.
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