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.
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
Must-haves
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
Nice-to-haves
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
You'll join the Development Team within our Development & Technology Practice. You'll report directly to the Director Development & Technology, since the Team Lead Development seat is currently TBD. Day-to-day, you'll work alongside Senior and Principal engineers on the same Practice, the AI team for agentic and LLM-driven integrations, the Tech Consulting team for architecture handoffs, and PMs from the PMO Practice on delivery.
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
Pension & Allowances: Company pension scheme via Allianz with graduated employer contribution from €50 to €290 per month, plus Lunchit meal allowance worth up to €100 per month
Health & Mobility: Business Bike Leasing, Urban Sports Club access at 8,000+ locations
Learning: Full Blinkist Business library (4,500+ books), 3 months of Babbel, HubSpot certifications fully funded
Flexibility: Up to 4 weeks per year working from anywhere in the EU with a €500 allowance, Spaces co-working membership, hybrid setup with on-site anchor in Böblingen
Culture & Tools: Flat hierarchies with direct access to CEO and Leadership, modern stack (HubSpot, Jira, Confluence, Claude AI), Corporate Benefits across 800+ brands
Thorit is one of Europe's leading HubSpot partners and a top business and technology consultancy. We combine strategic advisory with hands-on IT implementation, from CRM architecture to fully automated go-to-market infrastructure powered by AI and agentic systems.
Send your application via Ashby. A cover letter is optional, but a concrete example of the most complex API integration you've personally built end-to-end (the system landscape, the integration pattern you chose, what broke, and how you fixed it) is required.
