Munich | Full-Time | Starting asap

Fullstack Engineer (all genders, Mid-Level or Senior)

About avi
We are on a mission to elevate the patient experience and provide the best possible primary care by combining technology with a human touch. Avi runs patient-centric, tech-enabled medical practices that provide a convenient, personalized and holistic digital and physical patient experience unlike regular general practitioners. We employ our medical doctors and provide them a 21st century work environment that enables them to deliver the best care.

What you will be doing
As a Fullstack Engineer at avi, you'll be at the heart of our international engineering efforts, joining our core product team. You'll collaborate with other pragmatic technologists to design, implement, and deliver delightful and innovative treatment experiences on the web, mobile and backend, which we are building from scratch. Your work will help visualize medical treatment processes and ensure an accurate digital therapy process, impacting thousands of patients daily. We're looking for someone with a passion for creating highly reliable experiences that make a real difference.

Our Software & Tool-Stack
React Native (Expo), Flutter (Dart), Django (Python), Java EE, Kubernetes, Kafka, PostgreSQL, Redis, OpenSearch and many more. 

What success looks like

After 3 months, you'll have immersed yourself in our company culture, understood our technical needs, and established strong relationships with key stakeholders. You'll begin leading subprojects and contributing to the overall architecture of our platform.

After 6 months, you'll have a solid grasp of the healthcare sector and our platform's intricacies. You'll have led several subprojects, showcasing your ability to drive innovation and efficiency. Your contributions will start to show improvements in our platform's performance and reliability.

After 12 months, you'll be fully adapted to our dynamic environment and recognized as a critical strategic partner. You'll have made significant strides in optimizing our platform's architecture, with a track record of successful projects and improvements that align with our long-term objectives

Core skills & qualifications to help you succeed in this role are

• At least 3 years of professional experience in software engineering and development

• Proficiency in Java (EE), at least one commandline language (e.g. Bash, Python, Ruby) and Hybrid Mobile Frameworks (Flutter or React Native)

• A strong understanding of distributed systems and micro-service architecture 

• The ability to work independently and manage your own workload effectively 

• Strong written, verbal communication skills; ability to influence others within your team and outside your team 

• Attention to detail, particularly around software engineering fundamentals, testing methodologies, and quality 

• Strong sense of ownership, and initiative to fix problems and optimize systems that are both inside and outside your area of responsibility 

• Willingness and optimism to try new ideas; ability to quickly adapt and learn from mistakes and from other team members 

• Proficient in English

On the personal side you ideally describe yourself as the following

• A team player
• Quick learner, open to diving into and understanding diverse topics.
• Resilient, able to navigate challenging situations with confidence.
• I am kind!

The salary range projected is between 77.000€ and 99.000€ gross per year.

We strive to remove barriers, eliminate discrimination, and ensure equal opportunity through our transparent recruitment process. We are open to all groups of people without regard to age, color, national origin, race, religion, gender, sex, sexual orientation, gender identity and/or expression, marital status, or any other legally protected characteristic.

The Role 

The Senior Systems Software Engineer will be a member of the core team building the Quantum Key Distribution system. The focus is on high-performance Python services on Linux, algorithm optimization and acceleration (also via hardware offload), and the role spans defining software architecture, integrating with FPGA/embedded subsystems, and turning requirements into reliable, observable software.  

The Senior Systems Software Engineer leads and co-owns the overall internal QKD software architecture and client-facing software API. By setting engineering standards, mentoring, and unblocking delivery, they ensure predictable releases and a strong execution cadence. 

The Responsibilities 

The Senior Systems Software Engineer should expect to work in the following activities. 

• System architecture
  • Leading and co-owning the QKD software architecture: control plane services, key sifting/postprocessing integration, configuration management, monitoring, and external interfaces 
  • Defining module boundaries and service APIs; evolving the system toward clear data/control-plane separation 

• Efficient implementation and hardware/software integration
  • Designing and implementing high-performance Python services on Linux (asyncio, WebSockets, NumPy); profiling and tuning for latency and throughput
  • Developing, profiling, and optimizing QKD sifting and postprocessing algorithms (signal handling/processing, error correction/information reconciliation, LDPC, privacy amplification) to maximize key rate and minimize end-to-end latency; applying algorithmic improvements and implementation techniques (vectorization, concurrency/async, memory/layout tuning, C/C++ extensions, SIMD/CUDA/GPU/FPGA offload where appropriate)
  • Defining and maintaining robust interfaces with embedded/FPGA system components over UART/USB/PCIe/Ethernet; respecting realtime constraints and failure modes 
  • Guiding downstream system integration (WebSockets/gRPC/REST) and ensuring clear contracts and backward compatibility
  • Designing for test – building mocks/simulators and automated test systems 

• DevOps
  • Building and maintaining CI/CD with Docker and GitHub Actions; automated tests, static analysis, artifact management, and release pipelines
  • Establishing observability (structured logging, metrics, tracing) and operational runbooks; improving reliability and debuggability with SLOs/alerts
  • Embedding security and crypto hygiene by default: secure transport, secrets management, key handling, and coordination with cryptography stakeholders
  • Adding performance benchmarking and regression tracking for key rate and end-to-end latency; integrating profiling/flame graphs into CI and enforcing performance budgets 

The Requirements 

The Senior Systems Software Engineer is expected to have the following qualifications and experience. 

• 5+ years of Python development; 3+ years leading or co‑owning service/system architecture for a hardware‑first product 

• Strong Linux async Python (asyncio, WebSockets), concurrency (threads/processes), profiling/tuning 

• Proven custom hardware integration (MCU, FPGA) over UART/USB/PCIe/Ethernet 

• CI/CD with Docker and GitHub Actions; automated testing, static analysis, artifact management 

• Experience with GPU & CUDA acceleration/optimization; SIMD familiarity 

• Production observability (logging/metrics/tracing) and incident/debug practices 

• Working knowledge of relational/key-value/time-series stores (PostgreSQL/Redis/Prometheus)  

• Security by Default mindset: secrets, secure transport, key/crypto hygiene 

• Proficiency in written and spoken English 

• Ability to be on-site in Munich office several times per week 

• Applicants must have the right to work in Germany at the time of application. We do not provide visa sponsorship. 
• Must be eligible to obtain and maintain either (a) a U.S. Secret (or higher) security clearance or (b) an EU SECRET (or national equivalent) personnel security clearance. Employment is contingent on meeting applicable government security requirements; eligibility is determined by the competent authorities.

Good to have: 

• Experience with QKD systems, cryptography, or high‑rate data pipelines  

• Exposure to C/C++ for low‑level interfacing and FPGA/embedded ecosystems  

• Familiarity with gRPC/Protobuf, schema/versioning strategies, and Kubernetes 

The Role 

We are seeking a highly skilled Senior Software Engineer with expertise in designing and implementing scalable, data-driven systems. The ideal candidate is passionate about distributed systems, cloud-native technologies, and efficient data processing. The Senior Engineer will play a vital role in building both foundational engineering capabilities for scaling solutions and developing product solutions.

The Responsibilities 

Overall

• Design, develop, and maintain scalable backend services using Golang and Python.
• Build and optimize APIs using gRPC || GraphQL || REST to support high-performance applications.
• Deploy, manage, and monitor containerized applications using Docker and Kubernetes.
• Design and manage databases (SQL/NoSQL) to handle large-scale data efficiently.
• Implement CI/CD pipelines for automated testing, deployment, and monitoring.
• Work collaboratively with product managers, frontend engineers & researchers to deliver end-to-end solutions.
• Ensure application security, performance, and scalability best practices.
• Troubleshoot and optimize system performance, bottlenecks, and data pipelines.

Everyday

• Iterative updates and product development
• Planning, estimations, diagrams
• Prototyping for new features
• Agile sprint-based team cadence
• Brainstorming solutions with peers

The Requirements 

• 2+ years of experience in full-stack development.
• Strong proficiency in Golang || Python || TypeScript or similar languages.
• Experience with Kubernetes, Docker, and cloud-native application development.
• Hands-on experience with gRPC / GraphQL / REST APIs and microservice architecture.
• Knowledge of relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) databases.
• Familiarity with scalable data processing techniques.
• “You build it, you run it” - Experience with monitoring, logging, and observability tools.
• Strong problem-solving skills and ability to work in a fast-paced environment.
• Excellent communication and teamwork skills.
• Understanding of DevOps practices.

Desired

• Experience with cloud platforms (GCP [preferred], AWS, or Azure).
• Knowledge of event-driven architectures and message brokers (e.g., Kafka, RabbitMQ).
• Familiarity with streaming technologies.
• Exposure to frontend frameworks (React [preferred], Vue.js, or Angular).
• Understanding of infrastructure-as-code (Terraform, Helm).