Senior Backend Engineer, TypeScript

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Kooku Recruiting GmbH - Interim Recruiting & RPO

WebsiteLinkedInAll Job Openings

11 - 50 employees

🎯 Recruiter

👥 HR Tech

Recruitment • HR Tech

Kooku Recruiting GmbH is a dynamic recruiting agency that specializes in interim recruiting and recruitment process outsourcing (RPO). The company provides a range of services tailored to the needs of HR professionals and businesses looking to fill critical positions with qualified candidates efficiently and effectively. With expertise in KPI-based recruitment strategies, Kooku offers customizable recruiting solutions across various sectors including sales, tech, marketing, HR, and finance. The agency prides itself on its transparent and flexible processes, ensuring a high placement rate while optimizing recruitment budgets. Kooku operates from multiple locations including Berlin, Hamburg, Munich, Vienna, and Barcelona, serving clients across different industries by offering both remote and on-site recruitment solutions. The company's services extend to active sourcing, candidate assessment, employer branding, and direct search, aiming to improve clients' recruiting culture and strategies without the traditional trial and error approach.

📋 Description

• Design, build and operate backend services and REST APIs in TypeScript/Node.js • Integrate and monitor interfaces to POS, customer and partner systems • Implement rule-based checks and approval/exception workflows technically • Contribute to architecture: clarify requirements, evaluate options, make trade-offs • Implement security, data protection and traceability (auth, encryption, audit logs) • Ensure performance, scalability and stability for production • Write meaningful tests — from unit through integration to end-to-end • Expand observability: logging, monitoring and alerting for your endpoints and the overall software • Close collaboration with Platform

🎯 Requirements

• Several years of senior backend engineering experience, ideally with TypeScript/Node.js • Experienced in designing and operating REST APIs and integrating external interfaces • Confident with PostgreSQL or similar relational databases and clean data models including auditing • Understanding of complex rule-based business logic and workflows • Security mindset: OAuth2/JWT, authorization concepts, secure data flows • Pragmatism between code quality and delivery, plus enjoyment in architectural sparring • Initiative with ambiguous requirements: ask questions, structure, challenge the business • Fluent German, good command of English • Experience in regulated environments is a plus

🏖️ Benefits

• Real influence: you shape the architecture and standards of a platform from the early stages • Meaningful product in regulated healthcare with societal impact • Small senior tech team, short decision paths and decisions without committee marathon • Modern AI tools are explicitly encouraged in daily development (e.g., coding agents) • Remote-first in Germany • Actively negotiate priorities • Potential path toward Tech Lead as the team and subdomains grow