# Workflow Developer & Tester Remote from[Serbia](https://jobicy.com/job-region/serbia.md)Annual salary Undisclosed Salary information is not provided for this position. Check our [Salary Directory](https://jobicy.com/salaries.md) to estimate the average compensation for similar roles.Department [Programming](https://jobicy.com/categories/dev.md) Employment type Full Time, Job posted3 Jul 2026Apply before3 Aug 2026Experience level Senior Views / Applies 84 / 10 [About company](https://jobicy.com/company/webbing.md) * Share About [Webbing](https://jobicy.com/company/webbing.md) Webbing Inc is a leading brand that delivers secure, reliable, and continuous internet connection for devices, no matter where they are located. [Telecommunications](https://jobicy.com/company-category/telecommunications.md) * 2011 Actively Hiring Verified job posting This job post has been [manually reviewed](https://jobicy.com/tools/help-center/employee/how-does-jobicy-verify-the-legitimacy-of-remote-job-listings.md) for authenticity and compliance. ## 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. Show more [Apply now >](https://jobicy.com/jobs/143728-workflow-developer-tester.md) > Annual salary information is not provided for this position. Explore salary ranges for similar roles in our [Salary Directory ›](https://jobicy.com/salaries.md) * ![Upload CV](data:image/svg+xml;base64,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) ### Upload your resume now To unlock remote work opportunities and be discovered by global employers. 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