Senior Backend Engineer - AI Systems

Stellenbezeichnung: Senior Backend Engineer - AI Systems (m/f/x)

Your tasks

We are seeking a Senior Backend Engineer to design and develop scalable backend systems and APIs that power critical business applications. You will play a key role in shaping our system architecture, with a strong focus on serverless computing using AWS services. This role requires both technical leadership and hands‑on implementation, ensuring our infrastructure is robust, secure, and highly available.

You’ll collaborate closely with frontend developers, data scientists, and product managers to deliver seamless end‑to‑end solutions.

In this role, you will have the opportunity to:

• Design, develop, and maintain secure and scalable backend services, APIs, and microservices
• Architect and implement backend systems using serverless patterns (e.g., AWS Lambda, API Gateway, Dynamo
  
  DB, SQS, SNS).
• Optimize performance and ensure reliability of backend components at scale.
• Build reusable, well‑documented modules and libraries for internal and external integrations.
• Collaborate with cross‑functional teams to define and deliver complete solutions.
• Collaborate with cross‑functional teams (design, product, backend, and data) to deliver well‑integrated solutions.
• Document architecture, APIs, and system behavior for internal reference and onboarding.
• Stay up to date with industry trends and emerging backend/cloud technologies.

Your profile

• 5+ years of professional experience in backend software development, with deep expertise in Python
• Proven experience building serverless applications on AWS, including use of Lambda, API Gateway, Dynamo
  
  DB, S3, Event Bridge, Step Functions, and other AWS services
• Additional proficiency in at least two of the following languages:
  Type Script, JavaScript, Java.
• Solid understanding of backend architecture patterns, including microservices and event‑driven systems.
• Experience designing and managing SQL and No
  
  SQL databases.
• Familiar with Infrastructure as Code tools such as AWS CDK, Cloud Formation, or Terraform.
• Strong grasp of software engineering principles, security best practices, and scalable design.
• Comfortable working with Git‑based workflows and CI/CD pipelines
• Excellent problem‑solving and debugging skills
• Strong communication and collaboration abilities.
• Effective written and oral communication skills in English

Bonus Qualifications

• Experience with containerization and orchestration tools (e.g., Docker, Kubernetes).
• Familiarity with monitoring and observability tools like Cloud Watch, Datadog, ELK, or Prometheus/Grafana.
• Knowledge of Graph
  
  QL, gRPC, or Web Socket protocols.
• Exposure to Dev Ops or SRE practices

Why us?
At Beroe X nnamu GmbH
, we prioritize a balanced work‑life experience.

Here’s what we offer you:

• 4-Day Work Week & 30 Days Paid Vacation – More time to recharge
• Competitive Compensation – Fair salary and comprehensive benefits.
• Flexible Work Arrangements – Work the way that suits you. Professional Development – Access to training and certifications.
• Team Events – Bi‑annual company events and monthly lunch get‑togethers.
• Work Abroad Flexibility – Remote work from the EU or selected non‑EU countries for up to 8 weeks a year with travel insurance coverage

We operate on a hybrid model with offices in Berlin and Munich, offering a 32‑hour, 4‑day workweek. This means:

• In‑Office Collaboration
  :
  Work from the office two days a week
• Manage Your Own Hours
  :
  Flexibility to work around your needs as long as team goals are met.

Our Culture

We are committed to fostering a collaborative, innovative and inclusive work environment where everyone’s ideas matter. We know that diverse teams lead to better outcomes and welcome applicants from all backgrounds.

About us
At Beroe x nnamu GmbH, we are committed to empowering procurement teams to make informed, strategic decisions that drive real impact. By integrating AI and game theory, our Software as a Service (SaaS) platform, nnamu.negotiations, delivers a groundbreaking approach to complex, yet autonomous negotiations. nnamu.negotiations delivers additional total‑value‑of‑ownership savings efficiently and effectively for buyers with no prior knowledge of game theory required.

By combining our world class proprietary AI with an unmatched, unique database…