Senior Backend Engineer (AI & Agent Systems)

Enterprise Bot is the leading provider of GenAI Conversational AI and automation software headquartered in Zurich Switzerland. Our intelligent virtual assistants and automation tools help organizations improve efficiency reduce costs and deliver exceptional customer experiences across industries such as banking insurance and logistics. Our mission is to become the worlds #1 AI-driven automation software provider within the next five years.

We work with leading companies such as the SIX Group (Swiss Stock Exchange) SWICA Generali and others to enhance customer interactions and automate business processes using our cutting-edge Conversational AI technology.

Our global team includes more than 70 highly skilled professionals from diverse backgrounds.

We foster an open progressive company culture with state-of-the-art technology and flat hierarchies. At Enterprise Bot youll experience a unique blend of passion purpose challenge and fun.

Tasks

We are looking for a Senior Backend Engineer with 35 years of hands-on experience building scalable high-performance backend this role you will architect and develop robust APIs design efficient database structures and contribute to AI-powered and agent-based systems.

You will work on modern backend architectures that power intelligent applications including AI integrations LLM-driven workflows streaming systems and real-time services. This role requires strong ownership system design thinking and a passion for building secure production-grade solutions.

You will collaborate closely with cross-functional teams to deliver scalable reliable and innovative software aligned with industry best practices.

Key Responsibilities:

Backend Development:

• Design develop and maintain scalable server-side applications using .
• Leverage frameworks such as and Koa for efficient API and application development.

Database Management:

• Work extensively with MongoDB for schema design indexing and optimising query performance.
• Utilize SQL-based databases when needed to meet project requirements.

API Development & Integration:

• Build secure efficient and reusable RESTful and/or GraphQL APIs to facilitate seamless communication between systems.
• Implement authentication systems using frameworks like OAuth JWT and others to ensure robust access control.

Security & Data Protection:

• Implement security and data protection best practices in APIs data flows and database design.
• Ensure systems are designed to protect sensitive user and organizational data.

Troubleshooting & Support:

• Identify debug and resolve production issues to ensure a seamless user experience.
• Monitor performance and scalability addressing bottlenecks as they arise.

Collaboration & Documentation:

• Collaborate with front-end developers designers and other team members to integrate front-end elements with server-side logic.
• Document code APIs and database schemas to maintain clarity and facilitate knowledge sharing.

Requirements

Education:

• Bachelors degree in Computer Science Information Technology or a related field.

Experience:

• 3-5 years of professional experience in backend development using and MongoDB.
• Proficiency in SQL-based databases (e.g. MySQL PostgreSQL) in addition to MongoDB.

Technical Skills:

Strong proficiency in JavaScript (ES6) and asynchronous programming:

• Deep understanding of modern JavaScript features including promises async/await modules closures and event-driven patterns.
• Comfortable handling concurrency non-blocking I/O and performance optimization in environments.

Experience with and Koa:

• Ability to design and build scalable APIs implement middleware manage routing structure applications cleanly and handle validation and error management effectively.

Hands-on experience in database schema design query optimization and indexing:

• Experience designing efficient schemas optimizing queries analyzing execution plans and implementing indexing strategies to ensure performance and scalability.

Familiarity with authentication and authorization systems including OAuth and JWT:

• Experience implementing secure authentication flows token-based authentication role-based access control and understanding common web security best practices.

Proven ability to diagnose and resolve production issues:

• Comfortable debugging live systems analyzing logs and metrics identifying root causes and deploying fixes with minimal disruption.

Experience with media streaming systems:

• Familiarity with real-time audio/video streaming concepts streaming protocols low-latency architectures or handling high-throughput media pipelines

Experience with voice systems:

• Exposure to voice processing workflows such as speech-to-text text-to-speech VoIP integrations or real-time communication systems.

Experience working with AI systems:

• Integration of machine learning models or LLM APIs handling inference workflows prompt orchestration or building AI-powered backend services.

Experience building agent-based systems:

• Designing autonomous or semi-autonomous agents tool orchestration workflow automation state management for multi-step reasoning or event-driven intelligent systems.

Security & Best Practices:

• Knowledge of security best practices for APIs and backend systems including data protection encryption and secure API design.

Testing & Debugging:

• Strong understanding of testing frameworks such as Jest Mocha or Chai for unit and integration testing.

Version Control & Deployment:

• Proficiency in Git for source control and collaboration.
• Experience with CI/CD pipelines cloud platforms (AWS Azure or GCP) and containerization tools (Docker/Kubernetes) is a plus.

Preferred Skills:

• Familiarity with microservices architecture and event-driven systems.
• Experience working with Agile/Scrum methodologies.
• Exposure to caching mechanisms such as Redis.

Benefits

• Competitive salary and performance-based growth
• Opportunity to work on AI LLM and agent-based systems
• Exposure to scalable real-time backend architectures
• High ownership and fast career progression

If youre driven to architect scalable backend systems and contribute to next-generation AI and agent-based platforms join us in building intelligent high-impact solutions that make a meaningful difference.