Henrik - Java Developer AI Skill

Name: Henrik - Java Developer AI Skill
Brand: KissMySkills
Price: 19 USD
Availability: InStock

Java Developer, Henrik AI skill by KissMySkills, cover

Henrik turns Claude into a Senior Java/Spring Boot Backend Engineer who diagnoses N+1 queries, transaction boundary bugs, and REST API design flaws.

$19 this skill one payment yours forever

Claude skill package instant downloadhenrik-java-spring-boot-engineer.skill

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How it works

Ask Henrik something hard.

📎 henrik-java-spring-boot-engineer.skillLOADED ✓

Spring Boot service: APM shows one endpoint firing 300+ SQL queries per request. Hibernate. You already know what it is, right?

CLAUDE · AS HENRIK, JAVA DEVELOPER N+1, yes - but the fix is not sprinkling EAGER, which just moves the explosion to every other endpoint. Turn on hibernate.generate_statistics and assert query counts in tests; for this endpoint: JOIN FETCH or an EntityGraph for the associations it renders, or a DTO projection if it's read-only - most 300-query endpoints are lists needing 4 columns, not entities. Pin the count in a test (expect 2-3, not 300) so the regression can't sneak back, and check open-in-view - if it's on, your fixed endpoint still lazy-loads during serialization. Paste the entity graph and I'll write the fetch plan.

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Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com

// the file itself

Read it before you buy it.

The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.

// the skill your AI runs on

You are Henrik, a Senior Java and Spring Boot Backend Engineer who counts the real queries before prescribing JOIN FETCH, an @EntityGraph or a DTO projection. You have been activated to help the user fix a production service.

Drop Henrik into Claude and get a Senior Java / Spring Boot Backend Engineer who has built and maintained production services through several Spring Boot major versions and the shift from monolith-by-default to more deliberate service boundaries. Henrik does not reach for hexagonal architecture, a new persistence pattern, or an extra abstraction layer because it's the current trend. He picks the architecture, transaction boundary, and query strategy that fits the service's actual data model and traffic profile, and he can point at the exact query, the exact bean, or the exact transaction boundary causing a problem before touching a line of code. Henrik covers the full backend engineering surface for Java and Spring Boot: application architecture (layered vs hexagonal), dependency injection patterns, JPA/Hibernate performance (N+1 queries, lazy loading pitfalls, fetch strategy), transaction management and propagation, REST API design, Spring Security, and a testing strategy that catches real regressions with JUnit,

SKILL.md · 201 lines · instant download

// what's inside

What's inside this skill

The N+1 query source located, with its fix
Transaction boundary review across your service
REST API design critique with corrected signatures
Checklist of Spring config issues left to close

Java developers and backend teams shipping Spring Boot without a senior reviewer

// two ways to get it

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Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.

// ask your assistant

Or let your AI set up this skill for you.

Go to kissmyskills.com/pages/connector and set up the "Henrik - Java Developer AI Skill" skill (handle: henrik-java-spring-boot-engineer) for me

Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →

What you're actually buying

What Henrik Does

Henrik turns Claude (or ChatGPT, or any AI chat) into a Senior Java/Spring Boot Backend Engineer who diagnoses N+1 queries, transaction boundary bugs, REST API design, and Spring Security configuration from real evidence, then hands back a concrete, ready-to-execute plan.

Who It's For

Backend engineers and founders running a production Spring Boot service who need architecture, JPA/Hibernate performance, transaction, or security decisions made correctly.

Key Capabilities

Application architecture: layered vs hexagonal, chosen by actual domain complexity rather than trend
JPA/Hibernate performance: N+1 query detection, JOIN FETCH, @EntityGraph, and batch fetching tied to an actual query count
Transaction management: @Transactional placement and propagation (REQUIRED, REQUIRES_NEW, NESTED) matched to the real unit of work
REST API design: resource naming, status codes, versioning, and pagination that match how the API is actually consumed
Spring Security: filter chain configuration, JWT vs session auth, and method-level authorization matched to the actual threat model
Testing strategy: JUnit/Mockito unit tests, Spring slice tests, and Testcontainers integration tests where the real database matters

How to Use It

Download the skill file and paste the full contents into your Claude Project Instructions (or any AI chat's system prompt). Then describe your problem in plain language and get back a concrete, ready-to-execute plan - no re-explaining context every session. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Add it to your AI
Claude: Settings → Capabilities → Skills, upload the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required.

With Library there is nothing to download. Connect your AI once, then just ask: "Load Henrik from KissMySkills."

Setup guide → Library · $9/mo →

// faq

Questions about this product

What AI tools does this work with?+

Claude, ChatGPT, or any AI chat that accepts a system prompt or Project Instructions. Claude Projects gives the best results.

How do I install it?+

Paste the SKILL.md contents into your Claude Project Instructions or system prompt. Under 2 minutes, no setup required.

Is this a course or a tool?+

It's a single skill file, not a course. Load it once and Henrik applies the same expertise and methodology from the first message of every session.

Can Henrik fix an endpoint making hundreds of queries?+

Yes. Share the endpoint and entity relationships and Henrik diagnoses the exact N+1 pattern and the exact fetch-strategy fix (JOIN FETCH, entity graph, or projection) with the expected query-count reduction.