Workflow Developer & Tester
Webbing
Serbia
🌍 Удалённо
Senior
Полная занятость
🌐 Глобал
Сербия
Описание вакансии
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.
Requirements
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.
Strong Advantage
•* 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.
Nice to Have
•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.
About Webbing
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.