Job Board & Talent Pool

About Tacto

Tacto is a Munich-based startup revolutionizing procurement software for industrial organizations. Backed by Germany’s leading digital entrepreneurs, we are building an intelligent, data-driven platform that helps procurement teams focus on what matters by automating what doesn’t.

Procurement is one of the biggest value drivers in industrial organizations, yet current tools struggle to manage the complexity of parts, suppliers, and global supply chains. At Tacto, we are shaping the future of industrial procurement with cutting-edge software solutions.

The Role: Senior Software Engineer

We are looking for a Senior Software Engineer to be one of the first members of our engineering team. This is a high-impact role where you will shape our technical architecture, make key product decisions, and solve complex challenges as we build an intuitive B2B SaaS application.

As part of our core team, you’ll work closely with the founders to drive product development and engineering excellence.

Your Responsibilities

• Define system architecture and make critical tool decisions for a scalable B2B SaaS platform.
• Develop backend structures and APIs that serve multiple customers reliably and efficiently.
• Design and implement intuitive front-end components to enhance user experience.
• Shape the domain model and business logic of a complex enterprise application.
• Write clean, maintainable code with robust testing and code reviews.
• Assess technical effort and complexity for future product roadmap planning.
• Take technical ownership, making pragmatic and efficient decisions about frameworks, tools, and scalability.
• Drive an engineering culture of quality, innovation, and collaboration across the organization.

What Makes You a Great Fit

We prioritize problem-solving, creativity, and drive over specific technologies. However, the following skills and experiences will be valuable:

• Frontend: Experience with React or Vue, using component libraries like Material UI, Quasar, or Vuetify.
• Backend: Developed RESTful APIs using frameworks such as Django, Express, or Rails.
• Programming Languages: Proficiency in Python, Go, or TypeScript.
• Cloud Deployment: Familiarity with Azure, GCP, or AWS for deploying applications.
• Databases: Experience designing data models and working with PostgreSQL.
• Ownership & Collaboration: Strong communication skills, ability to mentor, and a passion for engineering best practices.

Compensation & Benefits

• Competitive salary, benefits, and virtual shares (equity).
• High-impact role with the opportunity to shape our product and engineering culture.
• Autonomous, effective team where you can solve technical challenges hands-on.
• Direct collaboration with the founders, influencing strategic decisions.
• A learning-driven culture, where feedback, growth, and curiosity are valued.
• A passionate, mission-driven team, building the future of industrial procurement.

Join Us – It’s Time to Build!

At Tacto, we believe in technical progress and product-led organizations. If you are excited about building cutting-edge enterprise software in a high-growth startup, we’d love to hear from you.

About Choco

Choco is on a mission to make the global food system sustainable by optimizing how food is sold, ordered, distributed, and financed. Our AI-driven software connects distributors with customers to enable waste-free and efficient operations.

We take AI seriously—not just as a buzzword, but as a core driver of our business. In just 16 months, AI has grown from 0 to 100% of our new revenue. We have built an exceptional AI team, leveraging cutting-edge technology to drive innovation in the food industry.

Since our founding in 2018, Choco has raised $328.5 million, achieving unicorn status in 2022 with a valuation of $1.2 billion. Backed by world-class investors like Bessemer Venture Partners, Insight Partners, Coatue Management, and LeftLane Capital, we continue to scale rapidly across Europe and the US.

The Role: Senior ML / AI Engineer

We’re looking for a Senior Machine Learning Engineer to help shape the future of AI at Choco. This role requires deep expertise in LLMs, search and recommendation systems, and production-scale AI deployment. You’ll work closely with our world-class AI team, building solutions that directly impact the company’s core revenue.

If you’re an exceptional applied researcher and engineer, thrive in a fast-paced environment, and want to drive innovation in AI-driven commerce, we want to hear from you.

Your Responsibilities

• Lead end-to-end development of AI and ML systems, including experimentation, deployment, optimization, and monitoring.
• Collaborate with cross-functional teams to integrate sophisticated AI models into our production systems.
• Ensure AI systems are scalable, efficient, and high-performing.
• Research and implement state-of-the-art LLM applications, retrieval-augmented generation (RAG), and fine-tuning techniques.
• Develop innovative solutions for complex business challenges, optimizing personalized search and recommendation algorithms.
• Support the team through mentorship, tooling, documentation, and best practice implementation.

What Makes You a Great Fit

• Expertise in LLMs: Hands-on experience with GPT-4o and similar models, safely deploying them in production environments.
• Search & Recommendations: Strong background in personalized search, NLP (Named Entity Recognition, information retrieval), and recommendation engines.
• Engineering Excellence: Strong programming skills and experience in building and maintaining scalable AI systems.
• Startup Mindset: Ability to navigate ambiguity, work independently, and move fast to get things done.
• Clear Communication & Collaboration: Ability to translate complex AI concepts into practical solutions for cross-functional teams.

Our Tech Stack

• Infrastructure: AWS Serverless Stack, Kubernetes, Kafka, PostgreSQL, DynamoDB, Elastic Cloud
• AI/ML Tools: Databricks, MLflow, PySpark, dbt
• Programming: Python, SQL, and the latest LLMs from vendors like OpenAI

Compensation & Benefits

• Salary: Competitive based on experience
• Equity: Meaningful ownership in a fast-growing AI-driven company
• Hybrid Work Setup: Berlin, Munich, or London locations with flexible office-based collaboration
• Rapid Growth & Impact: Be part of an AI team that is core to Choco’s success
• Opportunity to Work with World-Class AI Talent

Interview Process

1. Intro Call – Meet a founder or hiring manager to discuss logistics and mutual fit.
2. AI/ML Deep Dive – Discuss our approach to AI, review our current challenges, and explore potential contributions.
3. Technical Interview – Coding challenge and system design focused on production-scale AI deployment.
4. Final On-Site or Virtual Meeting – Work on a real-world AI problem with the team.
5. Decision & Offer – Join a fast-growing AI-first company with a direct impact on revenue.

At Choco, AI isn’t just an add-on—it’s at the core of our business. If you want to work on mission-critical AI systems in production, apply now and be part of the team driving the AI revolution in the food supply chain.

About Langfuse

Langfuse is building the open-source LLM engineering platform, helping developers understand how users interact with their LLM applications and how they can improve them. Our platform enables observability and tracing for AI-driven applications. Thousands of engineers already use Langfuse to debug, optimize, and scale their LLM apps.

We have raised a $4M seed round from top investors, including Y Combinator, Lightspeed, and General Catalyst. As we continue to scale rapidly, we’re looking for a backend engineer to join our team in Berlin, Germany.

The Role: Backend Engineer

We’re seeking a backend engineer to help scale our platform and ensure its reliability. At the core of Langfuse lies the ingestion of millions of events daily via our SDKs. You’ll play a crucial role in ensuring our infrastructure is highly available, scalable, and performant.

Your Responsibilities

• Optimize the latency of complex database queries in Postgres and Clickhouse
• Improve self-hosted deployments by refining our Kubernetes Helm chart
• Add Redis queues and worker containers to handle async tasks
• Explore and implement Clickhouse as a potential alternative for our needs
• Rebuild our SDKs for fully asynchronous networking
• Write Terraform code to dynamically scale Langfuse containers based on custom metrics
• Work closely with our CTO and team to ensure uptime and system resilience

What Makes You a Great Fit

• 3+ years of experience in backend or full-stack development, with a strong understanding of handling large-scale data
• Experience working on high-reliability and high-scale infrastructure
• Strong knowledge of TypeScript, Node.js, Express, Next.js, Prisma, tRPC, Clickhouse, Postgres, Redis, and S3
• Excitement for open-source development and direct user feedback
• A hands-on, problem-solving mindset with an ability to work autonomously
• Preference for in-person work in our Berlin Mitte office (4-5 days per week)

Bonus Points

• Experience designing SDKs and improving developer experience
• Background in AI/ML or working with LLMs
• Previous startup experience or having founded a company

Compensation & Benefits

• Salary range: €70,000 – €130,000
• Equity range: 0.1% – 0.35%
• Work with a high-performing, small team of engineers and founders
• In-person collaboration in our Berlin Mitte office
• Opportunity to contribute to a fast-growing open-source project
• Company trips, including previous visits to San Francisco

Interview Process

1. Intro Call (30 min) – Meet a founder to discuss logistics and mutual fit
2. Product & Tech Discussion (40 min) – Learn more about Langfuse’s product and engineering approach
3. Technical Interview (90 min) – Coding challenge and system design
4. On-site Super Day (0.5–1 day) – Work on a real problem with the team in our Berlin office (travel covered if needed)
5. Decision & Offer

We expect candidates to have explored Langfuse by signing up for a free account and reviewing our documentation.

About Knowunity

Forget traditional learning! At Knowunity, Europe’s fastest growing AI learning companion, we’re revolutionizing education for students worldwide. Founded in 2020, we’ve quickly become Europe’s leading AI learning companion with over 17 million students across 17 countries in Europe, North and Latin America.

Our platform creates hyper-personalized learning experiences based on each student’s specific needs. Our AI companion guides students through the app, prepares them for exams, creates personalized flashcards, and truly motivates them to learn. With Knowunity, students don’t feel forced to study—they actually love learning and progressing with their companion.

Backed by over $25 million in funding from leading venture capital firms including Project A, Redalpine, Stride, and Educapital, we’re positioned at the forefront of the educational AI revolution during the most exciting time in education technology.

The Role: AI Engineer

We’re seeking a motivated AI Engineer with strong product interest who is hungry to grow their knowledge and career in our fast-paced environment. As part of our 20-person Engineering Department reporting directly to our CTO Lucas, you’ll be at the heart of our AI development efforts.

Your Mission

• Build and own AI-powered products used by millions of students worldwide
• Develop and communicate strong product opinions, turning them into impactful features
• Explain why features matter to users and how they move key metrics
• Focus on outcomes and impact rather than specific implementations or tools
• Become an integral part of Europe’s fastest-growing AI learning startup

Why This Role Is Awesome

• Growth opportunities within an experienced engineering team
• Direct influence on product decision-making
• Immediate impact on millions of students globally
• Chance to work with state-of-the-art AI tools (e.g., Cursor, o1)
• Experience in a dynamic, fast-paced startup environment

Your Profile

• Experience working with Large Language Models (LLMs) and strong prompt engineering skills
• Experience with at least one backend programming language (Go, TypeScript, Python, etc.)
• Ability to thrive in a fast-paced startup environment
• Strong interest in consumer products and user experience
• Belief in the power of speed and execution with willingness to get hands dirty
• User-focused mindset that prioritizes delivery over rigid processes

What We Offer

We’ve created a supportive environment with numerous benefits:

Work Environment

• Hybrid work policy with travel budget and team workations
• Modern office with breakfast, fruits, snacks, coffee, tea, soft drinks
• Dog-friendly workspace

Personal Development

• Personal development budget
• Hackathons and mentoring opportunities
• Access to cutting-edge AI technologies

Wellness & Benefits

• Urban Sports Club membership
• become.1 and Likeminded memberships
• Corporate benefits through FutureBens
• Plantclub discounts

Team Culture

• Regular team events and company gatherings
• Sports and wellbeing activities
• Collaborative and supportive work environment

Join us and be part of our educational AI revolution! Help us create a future where every student on the planet can access, enjoy, and benefit from the highest quality education.

About telli

telli is a Berlin-based Y Combinator-backed startup (Fall ’24 batch) building AI voice agents that transform how businesses communicate with their customers. We believe voice is the most natural way humans communicate, but high-quality voice interactions have historically struggled to scale. Our mission is to help businesses bring their customer communication channels into a new AI-first era with simple, tailored tools.

In just a few months since our founding in 2024, we’ve grown to six-figure ARR and raised a $3.6M seed round from top-tier investors including Y Combinator and a leading European seed fund.

The Role: Founding Product Engineer

We’re seeking a driven founding product engineer with high agency to join our growing team in Berlin. As one of our early engineering hires, you’ll have significant impact on our product direction and technical foundation.

Your Responsibilities

• Work closely with customers to understand their problems and develop innovative product features
• Build scalable backend infrastructure capable of handling thousands of AI phone calls daily
• Design intuitive customer experiences for non-technical users
• Contribute to our full technology stack including TypeScript, React, TanStack, Node, Postgres, and temporal.io
• Shape the technical direction of a fast-growing AI startup

What Makes You a Great Fit

• Strong product mindset with ability to deliver end-to-end features
• Experience working in fast-paced environments with high ambiguity
• Technical skills overlapping with our stack (frontend engineering, server development, databases, cloud providers)
• Interest in LLM and Voice AI technologies
• Collaborative approach with desire to make an impact from day one
• Preference for in-person work in our Berlin Mitte office
• Drive to go beyond the standard 9-5 mindset

Compensation & Benefits

• Salary range: €70,000 – €120,000
• Equity range: 0.3% – 1.3%
• Access to cutting-edge AI tools that enhance productivity
• Gym subscription
• Beautiful office in central Berlin (Mitte)
• Company trip to San Francisco planned for fall 2025
• Opportunity to work with a small, high-performing team in a low-ego environment

About Kuro

Kuro is building the AI automation platform for the back-office of construction companies. Founded by Lea Leibold and Jonas Minkler, who previously built construction tech scale-ups alcemy and Capmo, Kuro helps construction professionals utilize their biggest data source – the 95% of unstructured data in the industry.

Our entry point is the estimation (quoting) process, the core and most expensive back-office operation. Our product extracts information from project inputs, automatically identifies building components, and enriches this data into 3D models, saving up to 90% of time for our clients.

Leading construction enterprises with a combined construction volume exceeding €30 billion annually are already using Kuro. We’ve recently raised a pre-seed round from the leading global construction tech VC and are growing our team in Berlin.

The Role: Founding Software Engineer

As one of our first hires, you’ll have significant influence over our product direction and technical foundation. You’ll work closely with our CPTO Jonas, who owns tech and product initiatives.

Your Responsibilities

• Develop Customer-Focused Use Cases
  • Rapidly prototype and deliver automation and insight solutions.
  • Evaluate feasibility and ROI for customer-specific applications.
• Optimize and Productionize Solutions
  • Manage experimentation pipelines and conduct error analysis.
  • Oversee evaluations, scoring, and golden dataset creation.
• Enhance ML and Data Pipelines
  • Continuously refine and optimize data pipelines to support new and existing use cases.
• Refine Evaluation Processes
  • Improve evaluation and scoring systems for better performance monitoring.

Recent Projects You Would Have Worked On

• Increased accuracy by 9% through prompt engineering with customer feedback.
• Improved accuracy by 11% using LLMs for prompt rewriting (LLM-as-an-audience).
• Reduced hallucinations by implementing an LLM-as-judge approach.
• Enhanced search relevance through BM25/Hybrid Search implementation.
• Developed AI-driven mapping of 3D-model metadata.

Our Tech Stack

• Web-App: Retool (low-code including custom React components)
• Cloud Functions: Retool / Supabase
• Database / Vector DB and File Storage: Supabase (PostgreSQL) / Weaviate / AWS S3
• Backend (Document Pipelines & Applied AI): Fast API / Python
• Hosting: Railway
• AI: Azure / OpenAI, Gemini, Cohere
• Evaluation & Tracking: Langfuse

Your Profile

• You thrive working in a small and accountable team with a lot of ownership
• You want to take full ownership in solving customer problems by designing and implementing features
• You are passionate about the potential of GenAI, a strong believer in its transformative power, and eager to explore how it can be applied to solve real-world challenges in the construction industry
• You build already applied end-to-end AI use cases and brought them to production
• You have at least 3+ years of experience as a software engineer in a fast paced environment
• You are fluent in both spoken and written English
• You are happy to work onsite at our office (Berlin, 13355) on a daily basis
• You have impressive achievements from previous careers and from side projects — we’re excited to hear about these!