Role overview

Qualifications

2–4 years backend software development in production environments
Proficiency in Go or Java
Experience with REST API development
PostgreSQL knowledge

Responsibilities

Implement Temporal workflow activities in Go
Build and validate unit tests for all workflow activities
Build the Inventory Management Database
Support Sr. Developer on all workflow development tasks

Key facts

Remote from: Netherlands
Full time
Mid-level (2-5 years)
QA Tester
English

Hard skills

PostgreSQL Unit Testing Java (Programming Language) Integration Testing Event-Driven Programming Kubernetes Test Automation Camunda Apache Airflow PSOS Event Monitoring

Other skills

Problem Solving
Teamwork

About the company

Webbing

Telecommunication Services

Webbing is a global data MVNO that delivers innovative enterprise grade, global connectivity and IoT services. Our secured network of 600+ mobile carriers across more than 200 countries, ensures superior data connectivity between business, people and things wherever the device is located. Since our foundation in 2010, we have been developing revolutionary SIM technology, powerful management platforms and a robust global network. Our leading-edge solutions deliver a streamlined, centralized, and scalable means of deploying and managing organizations' global fleet of devices. Our experts assist in every step of the device on boarding process to ensure you are set up to meet your organization’s connectivity needs. Enterprise customers can manage, monitor, and optimize data usage in real-time with Webbing’s dynamic software platform. Gain visibility by application type and have the power to safe list applications and limit non-business applications with the click of a button, saving money and improving compliance. Our superior technology combined with our solid strategic partnerships provide our customers with the perfect balance of the benefits of a local and roaming carrier. We deliver the reach of a global carrier with the quality of a local one with a single carrier that has flexible offerings, low latency, and sustainability at competitive rates.

Company details

Company typeSME

IndustryTelecommunication Services

Company size51 - 200

Links

Website LinkedIn See all jobs

Your match analysis

See how your profile stacks up against this role.

We compared the job requirements to your profile to show where you're strong and where you fall short.

Job description

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.