Workflow & Provisioning Lead

Stack

Responsibilities

• ▹Deploy and configure Temporal/Camunda or a similar workflow engine on Kubernetes, self-hosted, production-grade
• ▹Design and implement the SIM activation workflow: activities for HSS, OCS, PCRF, inventory update
• ▹Implement the SIM deactivation workflow with compensation and rollback logic
• ▹Implement the Plan Change workflow: OCS quota update plus PCRF policy change
• ▹Design the inventory management database schema: ICCID, IMSI, MSISDN, 30M+ record scale
• ▹Define a workflow versioning strategy: Temporal GetVersion API or similar
• ▹Lead another developer on development tasks and code reviews from week one
• ▹Order-triggered workflows: Order DB to Temporal/similar signal handler
• ▹Handle network triggers: location updates to workflow signals via Kong API Gateway
• ▹Retry policies, dead-letter handling and alerting per workflow type
• ▹Operate the Temporal production cluster and HPA configuration
• ▹End-to-end integration testing, load testing, runbook authoring
• ▹Post go-live hypercare and continuous improvement

Requirements

• ▹4-6 years of backend software development experience
• ▹Hands-on experience with a workflow orchestration engine: Temporal.io strongly preferred with production experience of workers, activities, signals, timers; Camunda, Apache Airflow or equivalent accepted with strong fundamentals
• ▹Go or Java: comfortable building production services in at least one
• ▹REST API design and implementation for 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, not just writing YAML
• ▹Experience with event-driven architectures: RabbitMQ, Kafka or Redis Pub/Sub
• ▹Designing for failure: retry policies, idempotency, compensation logic, DLQ
• ▹Ability to lead a junior/mid developer day-to-day
• ▹Fluent English

Nice to have

• ▹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
• ▹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

Soft skills

What we offer

• ▹Fully remote
• ▹Opportunity for professional development within a reputable, innovative, growing international company
• ▹An exciting and challenging greenfield platform with growth opportunities
• ▹Join a team of highly professional specialists in an international environment

About the company

Founded in 2010, Webbing is a global data MVNO delivering enterprise-grade, global connectivity and IoT services across more than 200 countries and 600+ mobile carrier networks.