Your mission We at SIDES are looking for a Senior Python Engineer & Tech Lead (m/w/d) to take ownership of our Python Backend ecosystem and shape the future of our technology stack. This is a unique opportunity to build and lead a growing team while staying hands-on with architecture and code. You will be the technical anchor for our Python backend, responsible for: Owning the Python backend ecosystem - Drive architectural decisions for a monorepo with independent REST services Leading critical technical initiatives - Plan, estimate, and deliver complex projects that span multiple teams and domains Building a high-performing team - Start with 1 medior engineer and grow to 6 team members through hiring and cross-training Maintaining engineering excellence - Protect and enhance our established quality standards while scaling This role starts at 70% hands-on technical work and evolves toward more leadership responsibilities as the team grows. You'll write production code, drive architectural decisions, and mentor engineers while coordinating with Product, DevOps, PHP, and other tech teams. Core Responsibilities : 1. Technical Leadership (Initial Focus) : Design, develop, and maintain backend services and APIs using Python, FastAPI, and SQLAlchemy Drive architectural decisions for the Python backend ecosystem and evaluate technical trade-offs Lead and track large-scale technical initiatives including migrations, integrations, and platform improvements Coordinate releases and deployments for Python services Ensure application performance, scalability, quality, and stability Participate in cross-stack architectural discussions (Python, PHP, GO, Flutter) Implement security and data protection measures Write clean, maintainable, well-documented code 2. Team Leadership (Growing Responsibility) : Mentor and coach team members through regular 1:1s, feedback sessions, and pair programming Guide technical decision-making and provide constructive code reviews Shield the team from ad-hoc interruptions and advocate for clear requirements Facilitate agile ceremonies (sprints, standups, retrospectives) as the team scales Collaborate with Product Management to refine requirements and estimate initiatives Foster knowledge sharing and documentation practices 3. Cross-Team Collaboration : Coordinate with DevOps, PHP, Frontend, and other engineering teams Bridge communication between technical teams and product stakeholders Drive alignment on technical standards and best practices across teams Your profile Required Qualifications : - Technical Expertise: 7 years of Python backend development in business/enterprise environments Strong expertise with FastAPI, SQLAlchemy, and ORM patterns Deep knowledge of databases (PostgreSQL, MySQL, Redis, DynamoDB) Proven experience with RESTful APIs and web services Understanding of asynchronous programming and event-driven architectures Proficiency with Docker, Git, CI/CD pipelines and deployment automation Familiarity with AWS cloud services and cloud-native development - Leadership & Project Management : Proven ability to lead technical projects from estimation through delivery Experience mentoring and coaching other engineers Strong documentation and communication skills Ability to track and coordinate initiatives involving multiple teams Comfortable estimating and planning large-scale technical work - Collaboration & Communication: Excellent problem-solving skills and analytical thinking Ability to push back constructively on unclear requirements Strong stakeholder management and cross-team coordination Team player with a collaborative mindset - Preferred Skills (Nice-to-Have) : Kubernetes (K8s) experience and container orchestration Event-driven systems and message queue experience (RabbitMQ, Kafka, etc.) PHP knowledge (helpful for understanding legacy systems and migrations) German language skills (our team is multilingual, but German is a plus) Product thinking mindset - ability to balance technical excellence with business value AWS services experience (ECS, Lambda, RDS, ElastiCache, etc.) Microservices architecture patterns Experience with monitoring and observability tools (Grafana, CloudWatch, etc.) Perks & Benefits What you can expect from us: A recipe for success: We turned 11 years old this year and are known as specialists in the gastronomy/delivery industry. With SIDES, you represent a leading player in this field. Add ownership: We offer you the opportunity to shape your talent and ideas. You have freedom and responsibility in your daily work within your team. High-quality work equipment: You will receive top-notch equipment to successfully perform your work. In the office, you will find modern devices and ample space for pleasant interactions with the SIDES team. Hungry for growth: Personal growth and continuous learning are our top priorities. We conduct regular feedback cycles and offer you opportunities to attend seminars, workshops, and conferences. Baking a positive workplace: You can expect a fantastic, perfectly connected office in the heart of Berlin (Schöneberg). Perks: Company discounts (CorporateBenefits), access to various employee discounts Discount on a gym membership E-learning opportunities Mental health app setup: InstaHelp Snacks and drinks in the office Baking a positive workplace: You can expect a fantastic, perfectly connected office in the heart of Berlin (Schöneberg). Sounds exactly like what you were looking for? Then we look forward to receiving your meaningful application, including your salary expectations and earliest start date. About us At SIDES, we are transforming the gastronomic delivery industry with our cutting-edge, cloud-based software. Our innovative, modular system is designed to meet the unique needs of each business, providing flexibility and scalability. With modules such as POS systems, webshops, apps, call centers, merchandise management, and vehicle and fleet management, we empower our clients to excel. Join SIDES and be part of a dynamic team dedicated to driving success in the delivery service industry through technology and innovation. Experience the future with us and make a real impact.