Mid-Level Go Engineer – Temporal & Telecom Backend Role in Columbus
Career & Market Insight
Role Level & Growth: This is a mid-level backend engineering role (2–4 years experience) with clear mentorship from a Senior Developer. The pair-programming expectation is a genuine green flag — it signals a collaborative, learning-focused culture rather than a sink-or-swim environment.
High-Value Skills Being Built: This role develops a rare and in-demand combination of skills:
- Temporal.io — a fast-growing workflow orchestration platform increasingly adopted by fintech, telco, and cloud-native companies. Expertise here is scarce and well-compensated.
- Telecom domain (BSS/OSS, SIM lifecycle, HSS/PCRF) — niche but lucrative; MVNO and IoT connectivity is a growing market.
- Large-scale PostgreSQL design (30M+ records, partitioning) — directly transferable to any data-intensive backend role.
Compensation Context: No salary is listed, which is a minor red flag. Go backend engineers with 2–4 years in Romania typically command €25,000–€45,000 annually. Candidates should negotiate based on the telecom-domain premium and the Temporal expertise demand.
Company & Culture Signals: Webbing is a bootstrapped/established MVNO (founded 2010) building a greenfield platform — this means real ownership and architectural influence without legacy debt. The international team and 200+ country footprint suggest exposure to complex, global-scale engineering challenges.
Green Flags: Greenfield codebase, pair programming culture, testing as a first-class responsibility. Watch for: no salary transparency, and scope of responsibilities is broad for a mid-level role — clarify sprint expectations in interviews.
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.
Frequently Asked Questions
Is this role truly fully remote or is there an expectation to work from a specific office?
Do I need to already know Go, or will the company support learning it?
What is the salary range for this position?
Is prior experience with Temporal.io required?
What kind of domain will I be working in?
