Hire Java developers
These senior Java developers build enterprise backends in Spring Boot and other Java frameworks. They've spent years inside large, inherited codebases, so we test them on exactly that: reading and extending code they didn't write, under time pressure, with AI tools off in the first assessment.
01
Judgement matters more than generated boilerplate
A Java developer can now scaffold a Spring Boot service in minutes using an AI agent. What separates a senior engineer is knowing which generated patterns fit the architecture and which ones will cause pain at scale.
02
Legacy migration work is faster but riskier
AI tools help engineers translate older Java or EJB code into modern equivalents quickly. The risk is that generated migrations miss transactional boundaries or threading assumptions, so verification matters more than speed.
03
Test coverage gaps are now harder to spot
AI-generated Java code tends to produce tests that pass without covering meaningful edge cases. Engineers who review and extend that output need a clear instinct for where coverage is cosmetic and where it's real.
How we assess Java developers
Every engineer works through a fundamentals assessment with AI tools switched off and a second assessment with their own agents running. For Java developers, these criteria carry the most weight.
- Debugging
In the first assessment, the developer is dropped into an unfamiliar Java codebase and asked to trace a bug through several layers of Spring infrastructure without documentation or AI tools.
- AI output verification
In the second assessment, we watch whether the developer catches incorrect transactional boundaries, wrong exception handling or missed null checks in AI-generated Java code before accepting it.
- Context-switch hygiene
Enterprise Java work means moving between modules, service layers and configuration, so we check the developer keeps clear notes and doesn't carry assumptions from one context into another.
Hiring with Miyagami
- One senior engineer, full-time, at a fixed monthly fee
- Employment, payroll and compliance included, no recruitment fee
Timeline
- Three-month minimum
- Wrong fit: we replace at our cost
How to review AI-generated code
Reviewing AI-generated code changes some of what reviewers look for and keeps the rest. This entry covers both, plus the specific failure modes to check for.
What is Backend as a Service (BaaS)?
BaaS provides pre-built cloud infrastructure (databases, auth, storage, APIs) so teams ship apps without building or managing servers from scratch.
What changed about code review
AI-generated code has changed what code review looks for. This entry explains why reviews take longer and what skills reviewers now need.
Questions about hiring Java developers
How senior are your Java developers?
The Java developers we put forward are senior, with 6+ years' experience on average, and they've shipped and maintained production systems in Java. Every one has passed both assessments, and you see their scorecards before you meet them.
How do you test Java specifically?
The first assessment puts the developer inside a real Java codebase without AI tools or documentation, where they debug, extend and explain the code. In the second assessment they work in the same environment with their own agents, and we look at what they verify as well as what they produce.
How quickly can a Java developer start?
You get a shortlist in five working days. From shortlist to first commit typically takes three weeks, covering interviews, contract and onboarding. Engagements are full-time only, with a three-month minimum.
What does a Java developer cost?
You pay a fixed monthly fee of €5,600 to €8,000 per full-time engineer, with employment, payroll and compliance included and no recruitment fee. The pricing page compares it with the all-in cost of a senior local hire in your country. Engagements are full-time with a three-month minimum, and if a placement doesn't work out, we replace them at our cost.
Do they work in our stack and tools or their own?
A full-time Java developer costs €5,600 to €8,000 a month. There's no recruitment fee and nothing upfront. If the fit is wrong, we replace the developer at our cost.
Get a shortlist within five working days
You share the roles and the stack in a short form or a thirty-minute call. Within five working days you get named senior engineers to review, each with both scorecards.
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