Software Engineer (all genders)

About the role

You'll own the integration backbone of our client projects: the RESTful APIs, webhooks, and middleware that connect HubSpot, ERP systems, data warehouses, and the long tail of third-party platforms our clients run. Today this work is squeezed between Senior and Principal engineers who are committed to delivery and AI initiatives. You free that bottleneck. You'll ship production code, write the OpenAPI specs that go with it, build a reusable integration pattern library, and advise client teams on integration architecture decisions. The bar is zero critical integration failures in your first 12 months.

Responsibilities

• You'll independently deliver at least 2 client integration projects (API, middleware, webhook scope) end-to-end with no critical escalations within your first 6 months
• You'll produce complete OpenAPI/Swagger documentation for every integration you deliver, reviewed and signed off by the Director D&T
• You'll establish a reusable integration pattern library in Confluence (minimum 5 patterns) that other D&T team members can reference
• You'll advise at least 3 internal project teams or client stakeholders on integration architecture decisions, with documented recommendations
• You'll reach full fluency in our dev workflow (Git branching model, CI/CD pipelines, Jira issue lifecycle) within your first 30 days
• You'll keep production incidents at zero for the integrations you build, with all incidents resolved within SLA
• You'll complete peer code review on at least 80% of team PRs within the agreed SLA
• What You Bring

Requirements

• 2 to 4 years of professional software engineering experience, with hands-on integration work as a meaningful part of the role
• Productive in at least one of Node.js, Python, .NET, or Java, with the ability to read and debug code in a second language
• Direct experience designing RESTful APIs and selecting integration patterns (webhook, polling, event-driven, middleware), with concrete examples of trade-offs you've made
• Treats OpenAPI/Swagger documentation as part of delivery, not as an afterthought
• Has shipped to production via CI/CD pipelines (not local builds or manual deployment)
• Comfortable translating technical integration constraints into plain language for non-technical PMs or client contacts
• Pattern of problem ownership: investigates, proposes, flags with context, rather than escalating "I'm stuck"
• Willing and able to work on-site in Böblingen at minimum 2 days per week
• Experience integrating with HubSpot APIs (REST, webhooks, custom workflows)
• Experience with iPaaS platforms (Workato, Make, Mulesoft, Boomi) or message queue infrastructure
• Direct exposure to SAP or comparable ERP integration patterns
• Your Team
• Tech Stack
• Languages: Node.js, Python, .NET, Java (productive in at least one, fluent in a second)
• Integration & APIs: REST, GraphQL, webhooks, event-driven patterns, message queues
• iPaaS / Middleware: Workato, Make, Mulesoft, Boomi, plus custom middleware in Node.js or Python
• Documentation: OpenAPI/Swagger as standard, ADRs in Confluence
• CI/CD: GitHub Actions or GitLab CI, sandbox-to-prod pipelines
• Core Platforms: HubSpot APIs, plus client systems (SAP, Microsoft Dynamics, Salesforce as integration targets)
• Internal Tooling: Jira, Confluence, Forecast, Claude AI, Claude Code, Cursor

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