Full-Stack Developer – Automation

metergrid GmbH

. Develop TypeScript-based automations and services across the entire value chain in HubSpot CRM .

Posted 11/6/2026full-timeHamburg • GermanyMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing TypeScript-based automations and services within HubSpot CRM, with a strong focus on backend development and integration architecture. Proficient in building scalable solutions and managing complex workflows while ensuring data consistency across systems.

Highest-signal resume keywords

TypeScript DevelopmentHubSpot Developer PlatformReact UI ExtensionsAPI IntegrationGerman Proficiency (B2 Level)

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Applicant Tracking System Keywords

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Hard Skills

Backend DevelopmentREST APIsEvent ProcessingAsynchronous SystemsCI/CD DeploymentsCustom-Code AutomationsData Consistency ManagementError Handling MechanismsVersioningAutomation Awareness

Soft Skills

Team-Oriented CommunicationDirect Communication StyleKnowledge SharingIndependent Work StyleTechnical Trade-Off Explanation

Tools & Technologies

HubSpot CRMNestJSOAuth 2.0WebhooksSaaS Platforms

Industry Keywords

CRM IntegrationBilling PlatformsAutomationData VolumesPerformance Limits

Tech Stack

Tools & technologies

ReactTypeScript

About the role

Key responsibilities & impact

Develop TypeScript-based automations and services across the entire value chain in HubSpot CRM
Develop HubSpot apps and React-based UI extensions for internal teams, from CRM cards to workflow actions
Operate and monitor integrations, including billing integrations
Manage scopes, token rotation, app versioning, and CI/CD deployments
Develop and operate custom-code automations within HubSpot workflows
Maintain workflows, including triggers, enrollment criteria, and error scenarios
Determine which logic belongs in workflows, custom code, or backend services, and migrate logic into testable, maintainable services
Analyze and resolve incidents, including data corrections and script-based backfills
Use HubSpot CRM APIs for objects, associations, and batch operations
Use webhooks and subscriptions for event-driven synchronization
Build retry, error-handling, and monitoring mechanisms while taking rate limits and data volumes into account
Define object relationships, ownership logic, and lifecycle states
Ensure data consistency across multiple systems
Integrate internal and external systems, including billing, metering, energy backends, and our own tech stack
Build clean interfaces between HubSpot and productive core systems
Help shape the long-term CRM and integration architecture and move complex business logic into testable backend services

Requirements

What you’ll need

At least 3 years of experience developing web applications, with a clear focus on backend development
Excellent knowledge of TypeScript
Solid React skills for CRM cards and UI extensions
NestJS is a plus
Experience with REST APIs, asynchronous systems, queues, and event processing
Understanding of API contracts, versioning, and testing
Several years of experience with API- and event-driven integration of SaaS platforms, particularly CRM or billing platforms
Practical experience with the HubSpot Developer Platform (private/public apps, OAuth 2.0, scopes, webhooks, and UI extensions) is a strong plus
Experience designing scalable CRM and integration architectures
Awareness of automation, performance, platform limits, and data volumes
Experience working with AI assistants on a daily basis and taking responsibility for their outputs
Independent, responsible work style and willingness to share knowledge
Team-oriented and direct communication style; able to explain technical trade-offs clearly to non-technical stakeholders
German proficiency at least at B2 level, both written and spoken

Benefits

Comp & perks

Flexible working arrangements with hybrid work in Hamburg; 1–2 days in the office and the rest remotely
Subsidy for the Deutschlandticket or individual public transport tickets
Bike leasing through salary conversion, with 100% private use
Subsidy for Urban Sports Club
Subsidy for company pension contributions
Regular cross-departmental events
Freedom to shape your work in a startup team without hierarchical layers
A wide range of opportunities for personal and professional development
Meaningful work contributing to the energy transition
Steep learning curve and ownership from day one