Job detail

Workflow Developer & Tester

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.

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Workflow Developer & Tester

Company

Webbing

Location

Finland

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Yes

Posted

02 Sept 2026

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duunitori.fi

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20381223

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07 Sept 2026

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https://duunitori.fi/tyopaikat/tyo/workflow-developer-tester-scsom-20381223

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https://duunitori.fi/tyopaikat/tyo/workflow-developer-tester-scsom-20381223

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Description

Description Implement Temporal workflow activities in Go: HSS adapter, PCRF adapter, Inventory update. Build and validat…

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Description Implement Temporal workflow activities in Go: HSS adapter, PCRF adapter, Inventory update. Build and validat…

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07 Sept 2026

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