Fullstack Software Engineer (Javascript, English, FE focus)

IN THIS ROLE YOU WILL:

• Deep-dive the Nexus frontend code base (swag-nexus repository), focusing on VueFlow, Pinia stores, and composition-based architecture.
• Build on the current workflow-canvas architecture — including node palette, minimap, snaplines, drag-and-drop behaviour, reversible history, and layout performance.
• Collaborate closely with backend engineers on real-time execution and monitoring UX, integrating Server-Sent Events (SSE) or WebSocket log-streams for live updates.
• Implement credential and secret management UIs with inline validation and secure interaction with backend APIs.
• Build UI elements with the Meteor (the unified Shopware design system) for consistency and accessibility.
• Drive frontend hardening: state isolation, performance budgets, accessibility (WCAG 2.1 AA), and skeleton-loading patterns.
• Increase end-to-end test coverage (>90%) using Playwright, ensuring high reliability across key user journeys.


Secondary responsibilities:
• Extend backend APIs and services (Node.js + TypeScript + Fastify-style modules) to support new workflow features and real-time data flows.
• Collaborate on WebSocket/SSE endpoint design for execution logs and state updates powering VueFlow interactions.
• Enhance event-driven orchestration by integrating NATS / Kafka / Red Panda for cross-service workflows between Nexus and DataBus.
• Contribute to observability: embed OpenTelemetry tracing, Prometheus metrics, and SLO dashboards.
• Implement feature flags and remote configuration pipelines for safe, incremental rollouts.
• Participate in CI/CD workflows (GitHub Actions, Docker, Helm charts) for linting, testing, builds, and deployments.

WHAT YOU WILL BRING:

• 5+ years building production-grade cloud services, with 3+ years using VueJS and TypeScript.
• Strong experience designing REST and/or GraphQL APIs with type safety, versioning, and clear contracts.
• Proven expertise with Database schema design, migrations, and query performance tuning.
• Comfortable with containerised deployments, CI/CD automation, and modern DevOps tooling.
• Working knowledge of NodeJS and TypeScript to collaborate effectively with backend engineers using VueFlow.
• Strong security mindset (JWT/OAuth flows, RBAC, OWASP best practices, and secret management).
• Excellent verbal English communication.


Nice-to-Have Skills
• Familiarity with the Shopware App System, including manifests, permission scopes, and webhooks.
• Basic literacy in Go, useful when pairing with the DataBus backend team.
• Experience with event sourcing, CQRS, or serverless runtimes.
• Knowledge of observability and telemetry (OpenTelemetry, Prometheus, Grafana, DataDog).
• Strong security mindset (OAuth/JWT, RBAC, OWASP practices).
• Hands-on experience with message queues or event buses (Kafka, Red Panda, NATS, or Redis Streams) and delivery semantics (exactly-once, at-least-once).
• Familiarity with REST/GraphQL API design, schema evolution, and type-safe contracts.
• Understanding of relational database design (PostgreSQL) and basic query optimization.
• Prior work on low-code, workflow, or visual programming platforms.
• Familiarity with the Shopware 6 ecosystem or Meteor component library.


Tech Stack
• Backend: Node.js 20+ + TypeScript 5 (Fastify-style modular server)
• Frontend: Vue 3 + VueFlow
• Streaming & Events: Kafka and Red Panda
• Event-Driven Architecture: Pub/Sub via NATS or Kafka clients
• CI/CD & Infrastructure: Docker, GitHub Actions
• Observability: OpenTelemetry, Prometheus, Grafana, DataDog
• Testing: Vitest (unit/integration), Playwright (for end-to-end flows)