Workflow Developer & Tester

The role involves developing and maintaining backend systems for telecommunications, focusing on workflow activities, database management, API development, and testing automation. It is suitable for experienced backend developers with a background in telecom or BSS/OSS.

Location: Remote

Responsibilities

• 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

• 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.

Benefits

• 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.