Job Description

• Deploy and configure Temporal/Camunda or similar Workflow Engine on Kubernetes (self-hosted, production-grade).
• Design and implement SIM Activation workflow: activities for HSS, OCS, PCRF, Inventory update.
• Implement SIM Deactivation workflow with compensation and rollback logic.
• Implement Plan Change workflow (OCS quota update + PCRF policy change).
• Design Inventory Management Database schema: ICCID, IMSI, MSISDN — 30M+ record scale.
• Define workflow versioning strategy (Temporal GetVersion API or similar) — foundational for long-term stability.
• Lead another developer on development tasks and code reviews from week one.
• Order-triggered workflows: Order DB → Temporal/similar signal handler.
• Network trigger handling: location updates → workflow signals via Kong API Gateway.
• Retry policies, dead-letter handling, and alerting per workflow type.
• Temporal production cluster operations and HPA configuration.
• nd-to-end integration testing, load testing, runbook authoring.
• Post go-live hypercare and continuous improvement.

Requirements

Must Have

• 4–6 years backend software development experience.
• Required: Hands-on experience with a workflow orchestration engine.

– Temporal.io strongly preferred — production experience with workers, activities, signals, timers.

– Camunda, Apache Airflow, or equivalent accepted if strong fundamentals.

• Go or Java — must be comfortable building production services in at least one.
• REST API design and implementation (designing APIs consumed by Kong API Gateway).
• PostgreSQL — schema design, indexes, query optimisation for large datasets (10M+ rows).
• BSS/OSS domain knowledge: provisioning flows, SIM lifecycle, telecom service activation.
• Kubernetes — deploying and operating workloads on K8s (not just writing YAML).
• Experience with event-driven architectures using RabbitMQ, Kafka, or Redis Pub/Sub .
• Experience designing for failure: retry policies, idempotency, compensation logic, DLQ.
• Ability to lead a junior/mid developer day-to-day Fluent English .

Strong Advantage

• Direct Temporal.io production experience (SDK, worker configuration, namespace management).
• Telecom network element experience: HSS, OCS, PCRF, SMSC interfaces.
• Diameter protocol (Ro/Gy/Gx) — even basic familiarity is valuable.
• Experience with mock-first development and contract testing.
• Prometheus + Grafana — instrumenting and monitoring workflow engines.

Nice to Have

• Experience at a telecom operator, MVNO, or telecom vendor (Ericsson, Nokia, Huawei, etc.).
• Knowledge of eSIM / GSMA SGP.22 standard.
• Python — for tooling, scripting, test automation.

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
• The opportunity for professional development within a reputable international innovative and growing company.
• 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.