Software Engineer (Backend) — AI Agent Systems

OnHires; Remote; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

A leading AI company in Europe is seeking a backend-focused Software Engineer to create production-grade AI systems. You will design backend components and maintain scalable services, working closely with product teams. Ideal candidates should have 2–6 years of experience, be proficient in Java, Go, TypeScript, or Python, and fluent in German or Dutch. This position offers the opportunity to work in a fast-paced, innovative environment with a strong engineering team.

Qualifikationen

• 2–6 years of professional experience as a Software Engineer or Backend Engineer.
• Strong experience in one of: Java, Go, TypeScript, or Python.
• Hands-on backend development: APIs, services, integrations.
• Practical experience with AWS (Lambda, ECS, etc.).
• Solid system design fundamentals and clean coding mindset.

Aufgaben

• Build backend components powering AI voice/chat agents.
• Design and maintain APIs, microservices, and system integrations.
• Develop reliable, scalable backend services on AWS.
• Integrate client systems (CRM, ticketing).
• Improve performance, latency, and reliability of core agent systems.
• Collaborate closely with product and ML engineering teams.

Kenntnisse

Backend development

Java

Go

TypeScript

Python

AWS

Fluent German

Fluent Dutch

Strong English

Jobbeschreibung

Location: Germany or Netherlands
Language: Fluent German or Dutch (C2 or Native-Level)
Type: Full-time

Work setup: Remote for now, transitioning to an office-first culture as local teams expand.
Contract: Official employment under Dutch/German labor law

Seniority: Mid–Senior Level (2–6 years of experience)

About our client

Our client is one of the fastest-scaling AI companies in Europe, backed by €134M in recent funding from top-tier investors (Index, Bezemer). The company builds enterprise-grade multilingual AI agents for voice, chat, and email, already used by leading brands in telecom, energy, banking, insurance, mobility, and healthcare.

Their AI agents handle over 300,000 customer interactions every week, delivering automation with a natural human-like experience - including real-time problem solving, intent understanding, and contextual reasoning The company combines a powerful AI platform with strong local implementation support, enabling enterprises to deploy production AI agents at scale in any language and any market.

Why this company is unique

• €134M fresh funding (summer 2025)
• Live in production with more than 10 enterprise clients
• Handles tens of thousands of concurrent conversations with enterprise-grade reliability
• Fully compliant and secure: monitoring, dashboards, guardrails, auditability
• Solves real business challenges: invoices, contracts, subscriptions, telecom/energy issues, banking queries
• Built by ex-AWS, ex-SAP, ex-McKinsey, TUM/RWTH engineers
• Not research - real AI deployed at massive scale

You will join a team creating AI systems used daily by millions of end users.

About the Role

We are hiring a backend-focused Software Engineer to build production-grade AI agent systems handling millions of customer interactions. This is not a research/ML role - the work is core software engineering: building backend systems, APIs, distributed services, integrations, AWS architecture, and performance-critical features. You will work on the systems that run the company’s voice and chat agents.

Your Responsibilities

• Build backend components powering AI voice/chat agents
• Design and maintain APIs, microservices, and system integrations
• Develop reliable, scalable backend services on AWS
• Integrate client systems (CRM, ticketing, telephony, internal tools)
• Improve performance, latency, and reliability of core agent systems
• Contribute to infrastructure automation and deployment pipelines
• Collaborate closely with product and ML engineering teams

Requirements

• 2–6 years of professional experience as a Software Engineer or Backend Engineer
• Strong experience in one of: Java, Go, TypeScript, or Python
• Hands-on backend development: APIs, services, integrations
• Practical experience with AWS (Lambda, ECS, DynamoDB, SQS/SNS, API Gateway, etc.)
• Understanding of distributed systems, async patterns, event-driven designs
• Solid system design fundamentals and clean coding mindset
• Fluent German or Dutch (C2 or Native-Level), plus very strong English

Nice to Have

• Experience with LLMs, RAG, or AI agents
• Familiarity with ASR/TTS, telephony, Twilio, WebRTC
• Experience with enterprise clients or B2B SaaS products
• Background working with high-scale or latency-sensitive systems

Why This Role Is Special

• Work directly with a world-class engineering team (ex-AWS, SAP, McKinsey, TUM, RWTH)
• Build real AI products used by major European enterprises
• Huge technical ownership and ability to influence architecture
• Modern stack, fast product cycles, no bureaucracy
• Opportunity to grow into Senior/Tech Lead as the team scales