Lead Architect m/f/d

About ATOSS 
ATOSS Software SE is one of Germany’s most successful tech growth stories. As the market leader in Workforce Management Software, we help companies work more intelligently, creatively, and humanely optimizing the balance between profitability and people. 

We’re a rare company: according to Handelsblatt (10/24), just 309 public companies worldwide achieved over 20% return on sales for ten consecutive years. Only two are based in Germany and ATOSS is one of them. 

With 19 years of record breaking growth, over €2 billion market cap, and listings in SDAX and TecDAX, we’re scaling globally and we’re growing. 

If you’re ready to drive impact in a high-performing B2B SaaS environment, this is your chance to elevate your career. 

The Person You are 

At ATOSS, we hire for both character and skill, seeking individuals who embody resilience, a pioneering spirit, and the passion to grow. 

We value those who: 
Think like entrepreneurs – taking ownership, pushing boundaries, and driving impact. 
Challenge the status quo – bringing fresh ideas and bold execution to the table. 
Thrive in change – seeing growth as a lifelong journey, both professionally and personally. 

The Role 

As a Lead Architect, you will act as the Transformation Lead for one of our most critical product lines: ATOSS Time Control (ATC). Your mission will be to guide the architectural evolution of the whole application stack — from its new, Flutter-based frontend, to its Java core, to its Azure-based cloud foundations. 

You will shape the future of a product in its 3^rd successful decade, whose SaaS deployment has just begun spectacularly. As we move our business away from on-premise deployments to the cloud, you will closely work with software and cloud engineering teams to modernize the solution and prepare it for international scale in the cloud. This is a hands-on, high-impact role with strong technical visibility across the company. 

Key Responsibilities

• Architect and drive the implementation of a Flutter-based frontend across web and mobile platforms.
• Lead the transformation of a mature product from legacy on-prem to a cloud-native, service-oriented architecture.
• Embed AI capabilities and analytics into the product to elevate user experience and business insight.
•  Architecturally guide four cross-functional agile teams across multiple locations in Germany and Romania.
• Collaborate with product, design, backend, cloud, and data teams to deliver cohesive, scalable functionality.
• Align development with Microsoft Azure cloud-native best practices, ensuring maintainability and scalability.
• Be a technical sparring partner for internal stakeholders such as CloudOps, Professional Services, and Customer Support.
• Mentor and develop frontend engineers, fostering high standards in code quality, performance and UX.
• Stay ahead of emerging technologies and trends, continuously improving our product and engineering processes.

Key Requirements

• 10+ years of professional experience in software engineering, ideally in SaaS or product companies.
• 4+ years in a role with architectural ownership of complex software systems.
• Proven ability to lead architecture transformations in cloud-native environments.
• Sound knowledge of Java, OSGi, Spring and modularization patterns in complex enterprise systems.
• Experience embedding AI/ML features and data visualizations into user-facing applications.
• Experience in frontend-backend architectures and modern UI frameworks, particularly Flutter/Dart for noth mobile and web.
• Track record of successfully guiding teams and delivering scalable, user-centric software solutions.
• Fluent in English (German is a plus).
• University degree in Computer Science or related field (Master’s preferred).

 

 Our Benefits  

• Competitive Rewards: Including profit-sharing and employee stock program. 

• Structured Onboarding & Continuous Leadership Development: Clear career paths onboarding through Expert & Leadership Tracks, plus access to ATOSS Academy. 

• Flexible Work Culture: Hybrid options (remote within the EU), 30 days of vacation, and a strong commitment to diversity & inclusion. 

• Engaging Team Environment: Seasonal company events, team retreats, and an in-house barista. 

• Health & Wellbeing: Including regular check-ups, corporate wellness programs, and Wellhub membership. 

• Stability & Growth: Company listed on SDAX & TecDAX, with 19+ years of record-breaking revenue and a 30%+ EBIT margin. Certified Top Employer© for the 5th year in a row. 

At ATOSS, great talent knows no limits. We welcome professionals from all backgrounds and empower their growth through an inclusive, skill focused environment. 

Join us and be part of a high-growth, future-focused company!