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How to assess a Java developer skills while hiring

How to assess a Java developer skills while hiring

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Arpit Mishra
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May 22, 2017
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3 min read
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Java has continued to be a major force in enabling these technologies within these enterprises.

The problem arises when you want to hire a candidate who has proven Java developer skills.

How do you assess Java developer skills with accuracy when you have no clue how Java works or have never worked init?

If you want to hire a developer who knows Java but doesn’t know how to develop good quality code in a reasonable amount of time, then proceed with the Java APIs and programming tests.

If you want a decent developer, then forget about a paper-pen programming assessment and just talk to them about how they would go about building solutions and the tools they would use, and you’d better use an online assessment.

Ask them about frameworks they know of and what their strengths and weaknesses are as developers. (Read:How to hire a technical source)

Awareness of different IDEs, build tools, test tools, and documentation skills would also be worth querying. If you want quality software, it’s important that they know the “why” and the “how.”

Does a resume by itself represent the actual skills of a candidate? If not, then how can you screen the candidate?

I’ve seen people without degrees who could write incredible algorithms and could quote Knuth by heart.

How can you find the right Java developer skills for your organization?

In this post, I will discuss the best practices we follow while hiring and screening Java developersat HackerEarth.

But before I begin, here’s a little primer.

Why Java?

Java is the closest thing to a Lingua Franca (idiom meaning “Common Language”) in the IT industry. Everyone who has used it once is likely to stick with it.

Java is a computing platform used for portable codes for desktop and server environments. In simple terms, it helps develop an application and share it cross-platform.

It’s an object-oriented programming language which comes with the niche facility of a just-in-time compiler.

What do you need to know before you hire a Java Developer?

Since Java is so often used in every possible application in IT, it is essential to understand that learning it in college or getting basic certifications are hardly useful unless the recruitment is for a beginner’srole.

Java is changing almost every year and with new build and framework releases, hands-on experience in the latest or required libraries and framework should be the priority.

These libraries contain pre-written essential required functions; you can save time by not having to rewrite anything.

A candidate working on J2SE 5.0 released in 2004 may not be knowledgeableenoughto work in Java 8 released in 2014.

Before we begin discussing the Java developer online hiring process, it is essential to understand common terms used in Java hiring. Many of these terms are often used interchangeably, and I will be sharing only the important ones.

Check out this amazing glossary of all the Java terms here .

What is Java SE and Java EE?

It refers to Java Standard Edition used for development and deployment of codes for the desktop environment.

Java Enterprise Edition is built on top of Java SE. Java EE provides an API and runtime environment for developing and running a large-scale application.

What certification can you expect?

Most candidates today, who see themselves as skilled developers, are certified in Java. But what are the various Java certifications and what do they mean?

Oracle has 4 levels of Java certification that certify you in different levels of expertise.

The table below represents the four levels and the certification and associated skills.

Oracle Certified Associate (OCA) Oracle certified Associate, Junior Java SE 5,6,8 Fundamental skills
Oracle Certified Professional (OCP) Oracle certified Associate, OCAJP 7, OCAJP 8 Implementation, Basic of web development
Oracle Certified Expert (OCE) OCPJP 6, OCPJP 7, OCPJP 8 Web Development, API, Enterprise, Server Faces, Web Services
Oracle Certified Master (OCM) OCEJWCD 6, OCEJWSD 6, OCEJSFD 6, OCEEJBD 6, OCEJPAD Architect, Designing, Enterprise edition technology

* Only Oracle certified candidates are considered to be Java certified.

List of common skills on which candidates are evaluated in a Java Developer hiring process

  • OOP Concepts
    • Abstraction (Interface, Abstract Class, implements)
    • Encapsulation (access modifiers – public, private, protected, default)
    • Inheritance (extends, super)
    • Polymorphism (overloading, overriding)
  • Core Java Concepts
    • Variables, Scope of Variables, Autoboxing/Unboxing, Constructors, Operators, Input, Output, Conditions, Loops, Methods, Arrays, Objects, String APIs)
  • Advanced Concepts
    • Packages, Interfaces, Inheritance, Polymorphism, Exceptions
  • Java Generics
  • Collections/Data Structures
    • Lists, Maps, Arrays Lists, Sets
  • Inner Classes
  • Static – Keywords
  • File Handling APIs
  • Network APIs
  • Garbage Collection
  • Serialization
  • JVM Architecture
  • Frameworks
    • Spring, Hibernate
  • Multi-Threading
    • (Synchronization, Thread, Runnable)
  • Experience in web services (REST and/or SOAP)
  • Build tools – e.g. Ant, Maven
  • Lambda Expressions
  • Streams
  • J2EE, EJB, JSF

Irrespective of this detailed list, there is no definite fail-safe way or approach to judging a candidate on these parameters.

Assessing a Java developer skills

Screening is often considered tedious, time-consuming, and still frequently inefficient when you are trying to find the right candidate. You may source 500 or 1000 resumes for a job, but what is important is getting the most suitable candidate for the job.

Over a period, I’ve realized that any Java developer candidate can be screened based on the following two challenges:

  • Simple algorithmic challenge
  • Application development

Simple Algorithmic Challenge

Despite some really amazing sources available for more detailed testing, many firms still prefer using simple algorithmic challenges in assessing the job aspirants. (Read – How to remotely assess tech talent?)

Thecandidate is provided with one or many programming problems which have to be completed within the stipulated time. The solutions are usually judged based on test cases, time, and memory efficiency.

Each programming challenge taken by candidates is evaluated for its accurateness, time, and space complexity by the technical team.

Unlike automated scoring, human raters could bias test results in different ways.

Tools like HackerEarth – Recruit help you test candidates with minimumhuman intervention. (5 reasons you should use a talent assessment tool)

Recruit challenges candidates using questions from its extensive library while also providing flexibility to enter questions of the recruiter’s choice.

A candidate can be tested on various programming skills through multiple-choice questions, subjective questions, programming questions, golf questions (Problems which are solved in the least number of steps), and approximation questions.

The solution to these questions is automatically evaluated based on defined criteria.

A sample Golf problemstatement for assessment:

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Application Development – Java Multiple File Project Challenges

Real-life problems do not come with a problem statement. Developers usually deal with problems of finding the right framework or editing a broken patch in a program while coding.

When it comes to hiring senior-level or experienced Java developers, it becomes verydifficult for recruiters, as well as candidates, to demonstrate their knowledge and skill througha simple programming challenge.

A full-fledged application challenge is used to test a candidate’s capability of developing a complete Java application. He or she has to apply theoretical knowledge and practical skills to get a complete application running.

The candidate must know enough about the framework and libraries to survive the screen test. The solution is then assessed manually using JUnit and by creating custom test cases.

HackerEarth Java Multi File Application helps you assess candidates on application-building skills. Similar to Algorithmic challenges, you can test candidates by using questions from the Recruit library or via a custom library.

The application feature helps a recruiter to check candidates’ know-how by requesting them to develop an application from scratch.

Or the recruiter can choose to partially share an application feature and ask them to complete the rest as part of the assessment.

Benefits of using a Java Multifile Project are the following:

  • It can be used to test hands-on programming skills rather than just algorithmic coding knowledge.
  • Candidates can actually relate the problems to real-life scenarios, which makes problem-solving interesting.
  • JUnits help in testing the entire code flow and not just I/O. Output matching is flawed and can even be achieved through brute force. JUnits on the other hand, if written properly, can test the entire code flow of the candidate.

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You may have realized while reading this lengthy article that the best approach to assess a Java developer is not via conventional approaches but vianew technologies foreffective assessment.


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Arpit Mishra
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May 22, 2017
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3 min read
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What It Takes to Keep Gen Z Engaged and Growing at Work

What It Takes to Keep Gen Z Engaged and Growing at Work

Engaging Gen Z employees is no longer an HR checkbox. It's a competitive advantage.

Companies that get this right aren’t just filling roles. They’re building future-ready teams, deepening loyalty, and winning the talent market before competitors even realize they’re losing it.

Why Gen Z is Rewriting the Rules

Gen Z didn’t just enter the workforce. They arrived with a different operating system.

  • They’ve grown up with instant access, real-time feedback, and limitless choice. When work feels slow, rigid, or disconnected, they don’t wait it out. They move on. Retention becomes a live problem, not a future one.
  • They expect technology to be intuitive and fast, communication to be direct and low-friction, and their employer to reflect values in daily action, not just annual reports.

The consequence: Outdated systems and poor employee experiences don’t just frustrate Gen Z. They accelerate attrition.

Millennials vs Gen Z: Similar Generation, Different Expectations

These two cohorts are often grouped together. They shouldn’t be.

The distinction matters because solutions designed for Millennials often fall flat for Gen Z. Understanding who you’re designing for is where effective engagement strategy begins.

Gen Z’s Relationship with Loyalty

Loyalty, for Gen Z, is earned, not assumed.

  • They challenge outdated processes and push for tech-enabled workflows.
  • They constantly evaluate whether their current role offers the growth, flexibility, and purpose they need. If it doesn’t, they start looking elsewhere.

Key insight: This isn’t disloyalty. It’s clarity about what they want. Organizations that align experiences with these expectations gain a competitive edge.

  • High turnover is the cost of ignoring this.
  • Stronger teams are the reward for getting it right.

What Actually Works

1. Rethink Workplace Technology

  • Outdated tools may be invisible to older employees, but Gen Z sees them immediately.
  • Modern HR tech and collaboration platforms improve efficiency and signal investment in people.
  • Invest in tools that reduce friction and enhance daily experience, not just track performance.

2. Flexibility with Clear Accountability

  • Gen Z values autonomy, but also needs clarity to thrive.
  • Hybrid and remote models work when paired with well-defined goals and explicit ownership.
  • Focus on outcomes, not hours. Autonomy with accountability is a combination Gen Z respects.

3. Continuous Feedback, Not Annual Reviews

  • Annual performance reviews feel outdated. Gen Z expects real-time feedback loops.
  • Frequent, actionable feedback helps employees improve faster and signals that their growth matters.
  • Make feedback a weekly habit, not a twice-yearly event.

4. Make Growth Visible

  • If career paths aren’t clear, Gen Z won’t wait. They’ll look elsewhere.
  • Internal mobility, structured learning paths, and reskilling opportunities signal future potential.
  • Invest in learning and development and make career trajectories explicit.

5. Build Real Belonging

  • Inclusion must show up in daily interactions, not just company values documents.
  • Inclusive environments where diverse perspectives are genuinely sought produce better decisions and stronger engagement.
  • Gen Z quickly notices when DEI is performative. Build it into everyday interactions.

6. Connect Work to Purpose

  • Gen Z wants to see how their work matters in a direct, traceable way.
  • Linking individual roles to tangible business outcomes increases ownership and engagement.
  • Purpose-driven work isn’t a perk. It’s a retention strategy.

7. Prioritize Well-Being

  • Burnout is a performance problem before it becomes attrition.
  • Mental health support, sustainable workloads, and genuine flexibility reduce stress and sustain engagement.
  • Policies must be real in practice. Gaps erode trust.

How to Attract Gen Z from the Start

Job Descriptions That Tell the Truth

  • Generic postings don’t convert Gen Z candidates. They want specifics: remote or hybrid expectations, real growth opportunities, and culture in practice.
  • Transparent job descriptions attract better-fit candidates and reduce early attrition.

Skills Over Experience

  • Gen Z and organizations hiring them increasingly value potential over tenure.
  • Skills-based hiring opens access to a broader, more diverse talent pool and builds teams equipped for change.
  • Hire for capability and future-readiness, not just years on a resume.

The Bottom Line

Retaining Gen Z isn’t about perks. It’s about rethinking the employee experience from the ground up.

  • Flexibility without accountability fails.
  • Purpose without visibility is hollow.
  • Growth that isn’t visible or structured drives attrition faster than most organizations realize.

The payoff: When organizations combine the right technology, real flexibility, continuous feedback, visible growth paths, and genuine inclusion:

  • Gen Z doesn’t just stay. They perform at a higher level.
  • Adaptive, future-forward thinking compounds over time.

That’s what separates organizations that thrive in today’s talent market from those constantly replacing people who left for somewhere better.

AI Tools for HR Managers in 2026: What's Actually Working (And What Isn't)

AI Tools for HR Managers in 2026: What's Actually Working (And What Isn't)

The current state of AI adoption in HR
88% of HR leaders say their organizations have not yet realized significant business value from AI. That number is striking, given that 91% of CHROs now rank AI as their single top priority. The gap is not a technology problem it is an adoption and strategy problem. Most HR teams have added AI to their workflows in some form, but very few have moved past experimentation into real, measurable impact.

This guide is for HR managers who want to change that. Not a list of tools to bookmark and forget, but a clear-eyed look at where AI is delivering results in 2026, what separates the tools that work from the ones that don't, and how to actually use them.

The adoption gap that most HR leaders aren't talking about

AI is present but underutilized.
According to the SHRM State of AI in HR 2026 report, 62% of organizations use AI somewhere in their business. But only 11% have embedded AI into daily workflows, defined as more than 60% of employees using it daily. That is a significant divide and explains why so many AI investments feel underwhelming.

Managers experiment more than employees.
A July 2025 Gartner survey of 2,986 employees found that 46% of managers are experimenting with AI, compared to just 26% of employees. Most organizations encourage exploration but fail to provide the structure, expectations, or training needed to make AI stick. Only 7% of organizations give employees guidance on how to use the time AI saves them.

The result: wasted potential.
Workforces have access to powerful tools but no framework for using them strategically. AI becomes another tab open in the browser, rather than a fundamental shift in how work gets done.

The opportunity is real.
Organizations that have moved from experimentation to integration are seeing tangible outcomes:

  • AI-powered recruitment tools reduce time-to-hire by an average of 30 days.
  • AI automates up to 60% of routine HR tasks, saving employees five or more hours per week.
  • Predictive analytics reduces voluntary turnover by 22–28% in the first year of deployment.

Capturing this opportunity requires the right tools and the right strategy.

Why 2026 is different from every other year of "AI in HR"

1. Skills-based hiring has gone mainstream.
Josh Bersin's 2026 Talent Report found that 72% of companies are moving away from degree requirements in favor of skills-based evaluation. Gartner reports that 65% of enterprises are actively prioritizing it. The traditional resume is no longer the most reliable signal of candidate quality, especially in tech roles where the half-life of skills is just two years.

2. Agentic AI has arrived.
Earlier generations of HR AI could automate tasks or analyze data. Agentic AI can plan, act, and iterate across entire workflows without constant human direction. 48% of large companies have already adopted agentic AI in HR, with projections showing 327% growth by 2027. This is no longer experimental.

3. Regulatory pressure is real.
The EU AI Act now classifies hiring AI as high-risk, making transparency and audit trails a legal requirement. Any AI tool influencing hiring decisions must be explainable. Black-box systems are a compliance liability.

What separates genuinely useful HR AI tools from the rest

They augment judgment rather than replace it.
Great HR AI tools make professionals better at their jobs. They surface the right information at the right moment, flag unnoticed patterns, and reduce cognitive load. Tools that try to remove humans entirely create legal risk and distrust. 88% of HR leaders haven’t seen ROI largely because their tools automate the wrong things.

They generate actionable insight, not just output.
Predictive models identify at-risk employees six months before they leave, skills-gap analyses shape hiring plans before a role opens, and candidate matching highlights transferable potential. This is the difference between AI that saves time and AI that changes decisions.

They are transparent and explainable.
Employees trust AI-generated reviews twice as often when they understand the criteria. 67% of candidates accept AI screening as long as a human makes the final call and the process is explained. Transparency builds trust, drives adoption, and ensures compliance.

Top AI tools for HR managers in 2026

HireVue
Standard for AI-powered video interviews and structured candidate assessments at scale. Cuts time-to-hire by 50%, supports 40+ languages, and uses IO psychologist-vetted guides. Bias audits and deterministic algorithms ensure fairness. Ideal for regulated industries and high-volume hiring.

Eightfold AI
Built for skills-first talent strategy. Maps 1.6 billion career profiles to a skills graph, matching candidates on potential rather than keywords. Increases recruiter productivity by 50%+ and reduces diversity sourcing time by 85%. Best for large enterprises focused on internal mobility and workforce planning.

Workday
Comprehensive HR platform with agentic AI for workforce planning, analytics, and employee lifecycle management. Acquisition of HiredScore integrates AI recruiting orchestration. Suitable for organizations needing a single system for headcount planning to performance reviews.

Lattice
Focuses on employee performance and engagement. AI identifies growth patterns, surfaces feedback trends, and flags disengagement early. Predictive models detect at-risk employees six months in advance, enabling targeted retention strategies. Ideal for culture and retention-focused organizations.

HackerEarth
Covers full tech hiring lifecycle, from sourcing developers through hackathons to live technical interviews. OnScreen AI interview agent uses lifelike avatars for structured, bias-free interviews. Ensures verification and cheat-proof processes. Trusted by Google, Amazon, Microsoft, Barclays, and Walmart.

Moving from experimentation to impact: a practical framework

1. Start with one high-friction problem.
Automate workflows that cost the most time or cause the most inconsistency typically initial candidate screening. Measure outcomes to justify next investments.

2. Define success before deployment.
47% of CHROs haven’t established clear AI productivity metrics. Set baseline and target improvements: time-to-shortlist, quality-of-hire, recruiter hours per hire anything trackable.

3. Put managers in the loop.
AI adoption gaps are often a manager problem. Give managers specific use cases, integrate AI into workflows, and provide language to discuss it with their teams.

The bottom line

AI will not change HR’s fundamental nature it remains a people function requiring judgment, empathy, and context. What AI improves is:

  • The quality of information available for every decision.
  • The time HR teams spend on work that doesn’t require judgment.

Organizations getting ahead in 2026 are those that select the right tools for the right problems and give teams structure to use them effectively. That is where the real advantage lies.

How to Handle Conflict at Work

How to Handle Conflict at Work

HR leaders often hear the same concern: "Small issues are turning into big problems, and teams are getting harder to manage."

They’re right. Conflict isn’t new, but how it appears today is different. Teams move faster, deadlines are tighter, and the pressure to deliver is constant. Friction builds quickly, and what used to stay small now escalates before anyone notices.

Here’s what most teams miss: the same conflict slowing them down can also be the thing that makes them stronger.

How Small Issues Turn Into Big Problems

You’ve probably seen this pattern before.

It starts with a misunderstanding, a missed expectation, or a poorly communicated decision. Nothing major, just enough tension to create distance.

That tension rarely gets addressed. Instead, it turns into silence. People stop raising concerns, avoid difficult conversations, and begin working around each other instead of with each other.

Over time, silence becomes disengagement. Collaboration drops. Trust weakens. Performance slips, and there’s no single moment you can point to as the cause. You’re left wondering, "What actually went wrong here?"

The shift that changes everything: the best teams don’t avoid conflict. They address it early. Honest communication and neutral guidance turn potential problems into opportunities to strengthen teams.

Conflict Is More Predictable Than It Feels

Most workplace conflict comes from a few common triggers:

  • Miscommunication or lack of clarity
  • Unclear roles and ownership gaps
  • Differences in work styles or expectations
  • Pressure from deadlines and performance targets

Recognizing these patterns early makes conflict easier to manage and often preventable.

Step 1: Make It Easy to Speak Up Early

The biggest reason conflict escalates is silence.

People notice issues early but hesitate to raise them. Maybe they don’t feel safe. Maybe they think it’s not worth it. By the time it surfaces, it always is.

The fix is straightforward:

  • Create regular space for honest conversations
  • Normalize feedback outside formal reviews
  • Train managers to handle uncomfortable discussions confidently

When people speak early, problems stay small and solvable.

Step 2: Act Early It Only Gets Harder

Many teams wait, hoping issues will resolve themselves. Conflict doesn’t disappear.

Small issues become frustration. Frustration becomes disengagement. Disengagement becomes attrition.

The best HR teams act early, even when conversations aren’t perfect. Early action is always easier than late correction.

Step 3: Managers Decide How Most Conflicts End

Strong HR processes matter, but most conflicts begin with managers.

Many managers aren’t equipped to handle conflict well. They avoid it, rush it, or escalate too quickly.

What works:

  • Listen before reacting. Understand what’s happening before seeking a resolution.
  • Stay neutral under pressure. Avoid taking sides prematurely.
  • Give clear, specific feedback. Vague conversations leave both sides confused.

When managers get this right, most conflicts resolve before HR intervention is needed.

Step 4: Focus on What Happened, Not Who Someone Is

It’s easy to say, "They’re difficult to work with."

It’s more effective to say, "Here’s what happened and the impact it had."

This shift:

  • Reduces defensiveness
  • Keeps conversations objective
  • Leads to faster, more durable outcomes

People can change behaviors. They resist being labeled.

Step 5: Give People a Process They Can Trust

Uncertainty worsens conflict.

Employees ask: Who do I go to? What happens next? Will this be handled fairly?

If answers aren’t clear, people stay silent or escalate too late. A simple, transparent process builds confidence and encourages early action.

How to implement:

  • Document it
  • Communicate it
  • Ensure managers know it as well as HR

Where Things Usually Go Wrong

Even strong HR teams fall into common traps:

  • Ignoring early warning signs — hoping small issues resolve themselves
  • Taking sides too quickly — before understanding the full picture
  • Relying on policy over people — process matters, but relationships matter more
  • Focusing on blame instead of outcomes — conflict resolution isn’t about who’s right

The goal isn’t to assign fault. It’s to decide what works next.

The Bottom Line

Conflict isn’t going away. How you handle it is a choice.

Handled poorly: drains teams and erodes culture.
Handled well: builds trust, sharpens communication, and strengthens performance faster than most team-building initiatives.

The best workplaces aren’t conflict-free.
They are just better at navigating it than everyone else.

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