Solution Architect/Tech Lead

About the Position

We are looking for a Solution Architect/Tech Lead to own the architecture, govern all integration decisions, and lead the team day-to-day. You are the technical authority and delivery anchor for the engagement. You operate full-time from Sprint 0 through Sprint 8. This is a hands-on role. You review code, resolve blockers, write ADRs, define API contracts, and lead the Sprint 0 evaluation of Medusa.js and Lago against an on-prem Kubernetes environment. You are also the person who presents technical decisions to the client and responds to technical challenges in real time.

Work model: Hybrid.

Our client is a full-service telecommunications provider that develops and delivers multimedia and internet services for residential customers. It supplies services to independent cable network operators and utility companies via a fiber-optic backbone and also operates directly as an internet and TV service provider in selected regions.

Responsibilities

• Own the overall solution architecture: service decomposition, integration patterns, event flows, deployment topology, and security boundaries.
• Lead Sprint 0: Medusa.js and Lago evaluation, Kubernetes environment validation, QMC API discovery, CI/CD pipeline establishment, and Definition of Ready / Done.
• Define and govern the API contract layer between new BSS services and QMC - change management, versioning, and integration risk surfacing.
• Review code across all workstreams (frontend, backend, .NET, DevOps). Maintain quality standards.
• Write and maintain Architecture Decision Records (ADRs) for all significant technical choices.
• Act as primary technical counterpart to Enterprise Architect at all sprint reviews and architecture sessions.
• Ensure observability is first-class from Sprint 1: OpenTelemetry instrumentation, DataDog dashboards, structured logging, trace propagation.
• Lead the final Walking Skeleton demo in Sprint 8 and the technical handover to the company's Ops.
• Manage technical risk, scope creep, and dependency escalation to the Delivery Lead.

Requirements

• Microservice architecture: 8+ years designing and delivering production microservice systems. API-first design, event-driven integration, decomposition trade-offs.
• Node.js / TypeScript: Hands-on capability. You write, review, and debug backend Node.js code - not just diagrams.
• .NET / C#: Sufficient to evaluate QMC integration complexity, review .NET code, and speak credibly with a.NET-focused client team.
• Kubernetes (on-prem): Production on-prem or self-managed cluster experience. Helm, networking, RBAC, resource management.
• Observability: OpenTelemetry, distributed tracing, Prometheus / DataDog. Designs observability in from the start.
• Legacy modernization: Strangler Fig, API facade, event-based decoupling. Experience building around retained systems.
• Client-facing communication: Comfortable presenting architecture to Enterprise Architects and non-engineering stakeholders.
• Agile delivery: Two-week sprint leadership. Definition of Done, acceptance criteria, technical risk management.
• Upper-intermediate level of English.
• Ability to visit the office occasionally.

Nice to Have

• Medusa.js, Lago, or composable commerce / billing platform experience.
• Telco BSS / OSS domain knowledge.
• Swiss or DACH market delivery experience.
• German or French language skills.

We Offer

• Remote work with occasional office visits
• An open, transparent, and fun work culture.