Senior Full Stack Engineer (m/w/d) – Flutter/PHP/Go

Your mission

SIDES develops a cloud-based POS and Payment Operating System for the hospitality industry. We connect cash registers, payment systems, delivery portals, kitchen tools, self-order solutions, apps, and webshops into a powerful, integrated platform – performant, scalable, and reliable, even under high load. Thousands of hospitality businesses trust our technology to efficiently and digitally manage their business.

Our Tech-Stack: Flutter (Mobile & Web), Go, PHP, and AWS – including real POS hardware that seamlessly integrates into our system.

Your main tasks:

• You set features end-to-end in the cross-functional team – from idea to design and implementation to rollout and operation
• You work across the entire stack – from backend to frontend
• You use AI tools (OpenCode, Copilot) responsibly and establish best practices in the team
• You ensure quality in operation – with focus on performance, security, stability, scalability, and observability
• You actively participate in architecture and design decisions
• You strengthen the team through mentoring and pair programming
• You establish standards for testing, code quality, and CI/CD with
• You develop clean APIs, well-thought-out data models, and performant user experiences

Your profile

Your profile:

• Multiple years of experience as a Senior Full Stack Engineer
• PRACTICAL, solution-oriented, and quality-conscious working style
• Deep expertise in Flutter or PHP or Go – as well as motivation to bring yourself into the other area
• Very good understanding of MySQL, relational data models, and API design
• Experience with AWS and containerized deployments; Kubernetes is a plus
• Systematic thinking across architecture and technology boundaries
• Independent, structured working style with developed analytical skills
• Very good German and English language skills in writing and speaking

Perks & Benefits

What you can expect from us:

• A recipe for success: For over a decade, we have been part of the hospitality and delivery industry. As specialists and market leaders, SIDES offers you the chance to actively participate in shaping the future of this industry.
• Ownership & design freedom: We give you space for your ideas and trust in your decisions. You work independently with support from a strong team.
• Hight-quality working equipment: Modern hardware, ergonomic workplaces, and a professional office setup ensure that you can do your best.
• Hungry for growth: Your development is at the heart of our concerns. With regular feedback, we support you professionally and personally.
• A positive work environment: Look forward to an open, trusting work environment and a friendly team in our central Berlin office in Südkreuz.
• Workplace Environment Perks:
• Zentral Office in Berlin-Südkreuz
• Kostenlose Snacks & Getränke
• SIDES Library
• Dog-friendly Office
• Onboarding Lunch zum Ankommen & Vernetzen
• Your benefits:
• €50 monthly benefit budget - you decide what to use:
  * JobRad
  * Deutschlandticket
  * Betriebliche Altersvorsorge (bAV)
  * Wellhub
• Urban Sports Club: Discounted membership for fitness, courses, and wellness.
• Instahelp: Professional mental health support - flexible and confidential.
• Babbel: Free access to flexible language learning.
• INCENT & Corporate Benefits: Attractive discounts and exclusive partner offers.
• Hybrid Work: A healthy mix of office and home office - depending on role and team.
• Flexible working hours: Working hours that fit your daily routine.
• 24. & 31. December free: without using vacation days.
• Company Events: Our highlights - the SIDES Summer Party and our Christmas get-together.

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