Senior Software Engineer (m/f/d) - AI & Product Engineering

Location: Hybrid (Munich-based team, 3 days/week in office); Workload: Full-time; Start: ASAP

About us

Hi, we are Jessy Works – an AI startup rethinking accounting from the ground up.

While accounting firms are struggling to find qualified staff, we build the solution: AI-powered accounting on autopilot.

Our AI assistants handle bookkeeping, routine workflows, and client communication – dramatically expanding the capacity of tax advisory firms.

Now we are looking for a Senior Software Engineer who wants to take real ownership, ship production-ready AI systems, and help scale a mission-critical product.

If you enjoy building stable systems, working close to product and founders, and using AI as a first-class development tool, keep reading.

Tasks

Build and own enterprise-grade AI systems that automate accounting and logistics operations at scale. You'll architect and deploy production AI agents using modern ML frameworks and Python infrastructure, running on cloud-native platforms with real-time document processing and automation capabilities. You feel fluent in transfering concepts with our AI researchers to production.

Core Technologies You'll Work With

AI & ML Frameworks

* Structured LLM programming frameworks for reliable AI agent development

* Multi-provider AI integration supporting major cloud AI services (OpenAI, Anthropic, etc.)

* Vector databases for production search and retrieval-augmented generation

* Distributed tracing and observability for ML operations monitoring

Backend & API Development

* Python 3.12 with modern async web frameworks for high-performance microservices

* Type-safe data modeling and validation frameworks

* Concurrent processing architectures for handling complex workflows

* Enterprise AI integration patterns and best practices

Cloud Infrastructure & DevOps

* Kubernetes orchestration on major cloud platforms

* Cloud-native services: object storage, NoSQL databases, serverless functions, email automation, OCR services

* Container orchestration with security-focused multi-stage builds

* CI/CD pipelines with automated testing and multi-environment deployment strategies

Specialized AI Applications

* Computer vision & automation for legacy system integration

* Intelligent document processing with advanced OCR and semantic analysis

* Knowledge retrieval systems for domain-specific expertise (tax, accounting, compliance)

* Multi-modal AI workflows for email, document, and structured data processing

Technical Responsibilities

Production AI Systems

* Design and implement structured AI agents for automated business process workflows

* Build knowledge retrieval systems for real-time information access and compliance checking

* Develop multi-modal AI pipelines processing diverse data types at enterprise scale

* Optimize AI model performance using advanced prompt engineering and workflow optimization

Full-Stack Development

* Build high-performance API services with comprehensive async support and type safety

* Implement vision-based automation for legacy application integration

* Create real-time document processing pipelines with advanced text extraction and analysis

* Design resilient distributed job processing systems

Infrastructure & Operations

* Deploy containerized applications on managed Kubernetes with multi-stage environments

* Implement Infrastructure-as-Code using industry-standard tools

* Build automated deployment pipelines with security scanning and validation

* Monitor production systems with comprehensive observability and alerting

Enterprise Integration

* Integrate with European accounting software and compliance systems

* Build automated email processing workflows with intelligent response generation

* Implement enterprise-grade secret management and access controls

* Design multi-tenant cloud architecture with proper security boundaries

Production Impact

You'll be building systems that:

* Process thousands of business documents daily with enterprise-grade accuracy

* Handle real-time communication workflows for logistics and accounting operations

* Automate complex interactions with legacy business applications

* Serve enterprise customers with strict compliance and security requirements

* Scale automatically with intelligent resource optimization

Required Experience

* Advanced Python with modern async frameworks and type systems

* Production ML/AI experience, preferably with LLM applications and vector search

* Container orchestration and cloud-native deployment experience

* Major cloud platform services and infrastructure management

* High-performance web frameworks and API design

Preferred Experience

* Structured AI programming frameworks and prompt optimization

* Computer vision and process automation technologies

* European business software and compliance systems knowledge

* Enterprise security and multi-tenant architecture

* Financial/accounting domain expertise

This role offers the opportunity to work with cutting-edge AI technologies in a production environment where your code directly impacts business operations and drives customer success in a highly regulated industry.

Requirements

Essential Requirements

* Senior-level experience as a Software Engineer with several years in production environments

* Expert-level Python skills - this is our primary development language

* Strong TypeScript/JavaScript proficiency for full-stack development

* Solid AI/GenAI systems background including hands-on AI inference experience

* AWS experience with serverless architectures and cloud-native development

* Infrastructure expertise with Terraform and Kubernetes (K8s)

* DevOps mindset - you build it, you run it philosophy

Technical Experience

* Experience building stable, scalable, and maintainable production systems

* At least one complete product go-live where you were actively involved

* Product launch experience and operating live systems under real user load

* Strong understanding of backend, frontend, and application architecture

* Windows OS session management knowledge for desktop automation workflows

* Java experience is a strong plus for enterprise integrations

Working Style & Collaboration

* Proven experience in sprint planning, refinement, and agile execution

* Highly self-driven, pragmatic, and solution-oriented approach

* Ability to identify and resolve impediments independently

* Experience with cross-functional collaboration and technical leadership

Language Requirements

* German language skills at minimum C1 level (spoken & written)

* You will have direct customer contact and need to communicate technical concepts clearly

* English proficiency for technical documentation and international team collaboration

Preferred Qualifications

* Experience with accounting/financial software systems

* Knowledge of German business compliance requirements

* Background in computer vision or UI automation

* Previous work in regulated industries

Benefits

* Direct collaboration with the founding team and key decision-makers

* Ownership and real impact on a core AI product

* Very very interesting tech stack with many things freshly backed from research

* Modern tech stack, AI-first development culture, and zero legacy baggage

* A product with real customer value in a massive, underserved market

* Hybrid setup with 1+2 office days per week in Munich

* Competitive compensation and long-term growth opportunities

* Fast learning curve, high trust, and minimal bureaucracy

* And yes – we celebrate wins: pizza & champagne included 🍕🍾

How to apply

* Short CV + LinkedIn profile

* 30-minute intro call – mutual fit & expectations

* Final fit call – scope, role, and start date

No cover letter.

No corporate nonsense.

Just honest engineering, real responsibility, and building something that matters.

If you want to help shape the future of AI-powered accounting with a strong founding team – we’d love to hear from you.