Production AI agents on the JVM – engineered for control.

Your Java and Spring systems already carry critical business logic. We design, build, and operate AI agents with Spring AI and Embabel, using typed actions, evaluations, observability, and explicit operational safeguards.

  • Java Champion
  • Oracle ACE
  • Microsoft MVP
  • VMware Certified Spring Instructor
  • Spring Certified Professional

Where should we start?

Choose the challenge that matters most right now.

Why teams call us

42talents is led by Patrick Baumgartner – Java Champion, Oracle ACE, Microsoft MVP, and speaker at more than 70 conferences and community events. Our advice combines production engineering, teaching, publishing, and hands-on work with Java, Spring AI, and Embabel.

  • 20+ Years building enterprise Java systems
  • 70+ Conference talks at Devoxx, Spring I/O, JavaLand, JAX & W-JAX
  • 200+ Technical workshops delivered
  • 2013 Started lecturing at ZHAW School of Engineering

We also help run the Swiss engineering community: JUG Switzerland board, Voxxed Days Zürich, SoCraTes Switzerland, and Software Crafters Zurich. Read more about the people behind the work on our company page.

What we do

Agentic AI engineering is our focus. Architecture reviews, modernisation, coaching, and custom delivery provide the foundations and engineering capability needed to run consequential systems in production. Experienced practitioners remain involved from discovery through delivery and handover.

  • Agentic AI Engineering

    We take your AI pilot towards production. Agents with Spring AI and Embabel, grounded in your data, with goal-oriented planning, evaluation harnesses, guardrails, cost control, and observability integrated with your operating model.

    Fixed-scope discovery and first production agent.

  • Architecture Review

    An independent, senior read on your system in two weeks. Where the material risk sits, what to fix first, what to leave alone – delivered as a written report and a prioritised roadmap your team can act on immediately.

    Fixed scope, fixed price, two-week turnaround.

  • Application Modernisation

    Get your delivery speed back without a big-bang rewrite. Incremental migration of legacy Java systems to a well-bounded modular monolith with Spring Modulith, planned to preserve a releasable path and minimise disruption to feature work.

    Fixed-scope discovery first, then delivery in increments.

  • Developer Coaching

    Embedded technical coaching for sustained changes in day-to-day practice. Pairing, code review, testing discipline, and AI-assisted workflows are applied in your codebase and on current tickets.

    Typically one to two days per week, three months minimum.

  • Custom Software

    When you need the system built, not just advised on. We design and ship Java and Spring applications, including agentic workflows where justified, with explicit operational responsibilities and handover.

    Scoped per engagement – fixed-price discovery first, then delivery in increments.

Wondering if you are ready for AI agents? Take our free AI readiness checklist – 35 questions across use cases, data, architecture, skills, governance, security, and cost. No sign-up.

What changes

Anonymised outcomes from recent engagements. Results depend on each organisation’s starting point, constraints, and participation.

  • Quarterly → daily Financial services

    Deployment cadence moved from quarterly release trains to daily production deploys, with automated quality gates replacing the manual sign-off ritual.

  • +25% throughput Enterprise product team

    Delivery throughput increased after an embedded coaching engagement covering testing discipline, pairing, and AI-assisted development workflows.

  • Pilot → production Swiss enterprise, JVM estate

    An LLM proof of concept that could not be tested or explained became an agent using goal-oriented planning, with evaluation harnesses, guardrails, and production observability.

Training

Hands-on courses for Java and Spring teams, taught by practitioners who use this stack in delivery and public teaching, including Devoxx and Spring I/O. On-site in Zürich, at your office anywhere in Europe, or fully remote – in English or German. See the full training curriculum.

In-house, up to 12 participants. Content tailored to your codebase.

  • Spring AI & Embabel

    Build intelligent applications and reliable agents: LLM integration, RAG pipelines, MCP, function calling, and agent workflows that select actions from goals and conditions.

  • Core Spring

    Build a practical foundation in the Spring Framework: IoC container, dependency injection, AOP, data access, and Spring MVC. Includes Spring Certified Professional exam preparation.

  • Spring Modulith

    Design maintainable modular monoliths: verify boundaries with architecture tests, decouple with domain events, and generate living architecture documentation.

  • Spring Security

    Secure your Spring applications with authentication, authorisation, OAuth2, JWT, and method-level security.

  • Spring Boot Performance

    Tune startup time, reduce memory footprint, and assess GraalVM native images against your production requirements.

  • Bespoke Workshops

    Architecture, testing, refactoring, code review, or AI-assisted development – designed around your product, your stack, and your real code.

How we work

Practical collaboration, modern engineering, and outcomes your team can sustain without us.

Experienced practitioners stay involved

The people who shape the recommendation remain involved in the code, reviews, and handover. You know who is accountable for the work.

Inspectable plans, evaluated behaviour

Goal-oriented planning makes the selected actions and conditions inspectable. LLM-backed steps remain non-deterministic, so we evaluate, validate, observe, and constrain them.

Quality supports delivery speed

Tests, observability, and maintainable code shorten feedback loops and make failures easier to diagnose.

Knowledge transfer built in

We pair, review, and coach throughout, then reduce our involvement as your team takes ownership of the result.

Straight answers

If your problem is not one we should solve, we will tell you and, where we can, recommend a more suitable direction or specialist.

Let’s talk

Book 30 minutes. Tell us what you are building, the decision in front of you, and what is getting in the way. You will speak with a practitioner who would remain involved if we proceed.

Prefer email? We reply personally within one business day – and if we are not the right fit, we will say so.

42talents GmbH
Kreuzstrasse 33
8008 Zürich
Switzerland