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

Location & Workload Hybrid (Munich-based team, 3 days/week in office); 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 transferring 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

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

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. #J-18808-Ljbffr