Tech Lead – Senior Software Engineer, Internal Tools & Systems

🕒 May 5

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Jean&Len

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2013

💄 Beauty

🛍️ eCommerce

🛒 Retail

Beauty • eCommerce • Retail

Jean&Len is a German D2C online retailer and beauty brand offering a curated range of personal care and home fragrance products, including shampoos, conditioners, hand and body soaps, face care, perfumes, refill packs, and home scents. The site emphasizes gift sets, seasonal promotions, and convenient e-commerce features (free shipping thresholds, Klarna pay-later, customer accounts, and a loyalty-style points system), along with product information and a blog for beauty and wellness topics. Jean&Len appears focused on accessible, sensory-driven personal care and home products sold primarily through its web store and a flagship retail presence.

📋 Description

• You analyze existing tools and make them more stable • You fix bugs, performance issues, and data problems • You bring structure to our systems, e.g., APIs, data models, and workflows • You develop guidelines, standards, and meaningful structures for building internal tools and AI-assisted solutions • You design quality processes, testing approaches, and review mechanisms, including code reviews • You make pragmatic decisions about what to keep, what to improve, and what to remove • You support internal and external developers to work cleaner and more efficiently and ensure our quality standards are met • You connect data from different sources, e.g., ERP, e-commerce, and internal tools • You ensure data is consistent, traceable, and reliably usable • You help the team use AI sensibly in development and automation

🎯 Requirements

• Solid experience in software development and working with legacy/grown systems • Enjoy being hands-on in the code • A pragmatic view of existing, imperfect systems • The ability to make pragmatic decisions and improve existing systems rather than rebuilding everything from scratch • A good sense for meaningful simplification, clean structures, and stable solutions • Broad technical understanding with a clear strength in software development, systems thinking, and an interest in modern development approaches including AI support • Ideally experience with APIs, data models, internal tools, or system integrations

🏖️ Benefits

• Significant freedom to implement your ideas • Flat hierarchies in a fast-growing company with short decision-making paths • Flexible start time between 7:30 AM and 9:30 AM • Modern office in the heart of Cologne with the option to work from home up to two days per week • Free underground parking for employees (first-come, first-served) • Free beverages (and occasionally a Kölsch after work ;)) • Up to four weeks of workation per year • Discounted Urban Sports membership • Employer contribution to pension plan • Company health insurance (annual health budget) • JobRad and JobRoller • Employee discount subsidy for company products • Access to corporate benefits (employee discounts with many partners) • Company/team events • Lots of fun and humor & a great team spirit