The best coding interview tools for successful tech hiring

Uncertainty and ambiguity have been the central themes of the ongoing COVID-19 crisis. The macroeconomic aftereffects of the pandemic are likely to sustain for times to come. Diverse industries have been impacted by this unforeseen disruption, which has derailed their quotidian practices – the global markets are in a ‘wait-and-watch ‘mode. Social distancing and discretionary movement have taken precedence, bringing the hiring process to a virtual standstill. However, this has also allowed companies to revisit their recruitment strategies.

Amid the doom and gloom, various C-level executives in top tech companies are also hiring. They reckon software engineers to be the company’s real assets and maintaining business continuity hinges upon onboarding quality candidates. Therefore, they need fail-safe means to assess, interview and hire the most competent professionals without risking applicants’ safety.

It is well-accepted that HR (Human Resource) professionals face constraints in hiring tech candidates as, often, hiring managers do not understand what needs to be deduced in a technical interview. As a result, HRs are inclined toward traditional face-to-face interviews to assess technical candidates. There is nothing wrong with the process, but interviewers can only evaluate an individual’s characteristics, perception, opinion, and attitude, rather than hands-on coding skills. Add to that a lengthy list of considerations, lengthy screening processes, wrong candidate filters or an outdated interview approach that impacts quality hiring.

A decade ago, leading companies such as Microsoft used to pose brain teasers during interviews, such as “why are manholes covered round?” It attempted to assess the candidates’ caliber but did not suffice. Companies later began showering trivia questions on interviewees, including JavaScript questions and random factoids about numerous other languages. Mathematical puzzles continue to form a part of the technical interview process.

These techniques may seem intriguing but cannot circumvent a wholesome candidate selection that meets hiring goals. They do exhibit candidates’ intellect and craftiness or their levels of logical reasoning skills but do not assess the actual coding ability and knowledge needed for the job.

Hence, one of the ways that HRs can strengthen their recruitment process is by streamlining their technical interview process using the coding interview platforms. As a result, they are closer to the goal to interview and help hire the best by eliminating pre-interview inefficiencies and bringing clarity to the initial selection. The more refined and streamlined your filter is, the more purposeful your interview is.

A coding interview platform is an automated tool to evaluate candidates’ coding skills. It is a comprehensive software platform that provides an interactive, detailed development environment to help recruiters hire the best talent.

The coding interview platform takes the guesswork out of a time-consuming screening process by providing a well-rounded evaluation of candidates’ technical skills and knowledge for any role/position in consideration. It does so by gauging the test-taker’s knowledge of frameworks, tools, libraries, and hands-on experience of any particular technology needed for performing the job effectively.

Here are the two prerequisites to conducting a successful tech interview:

An efficient interview process begins with choosing the right candidate for the interview via effective screening methods. Companies receive a vast number of resumes and often struggle to filter quality candidates. By using a combination of knowledge and application-based questions such as MCQs and coding simulators, hiring managers can gain a holistic, evidence-based overview of a programmer’s potential before advancing to the interview round. Here is how:

• MCQs act as the first filter that shortlists based on knowledge, concept, application, and analysis

• Afterward, the selected few are assessed via coding simulators that provide a real sense of their ability by asking them to mirror real-world challenges 

Technical screening verifies more than merely the coders’ fundamental skills. It highlights their real-world coding ability, coding knowledge, language proficiency, usage of frameworks, etc. It ensures that employers do not have to sit through time-consuming interviews with applicants who are neither qualified nor suited for a particular position. You will be amazed at the number of candidates technical screening weeds out. Also, valuable evidence-based analytics on candidate potential and performance deter hiring managers from biased shortlisting, leaving the company with the best for the interview.

The most common interview approach used by hiring managers to assess a coder’s capability is via Whiteboards. This interview approach traditionally involves using a whiteboard or paper to write an algorithm or an actual code instead of an IDE (Integrated Development Environment) or an editor. The coder is expected to use a specific programming language and solve a coding problem by penning down the process on the spot. Sometimes, whiteboard questions are simple wherein the candidates are asked to draw a circle or a grid using only an algorithm. They are also complicated, with more than one programming language to judge how coders handle complexities.

Such a traditional interview is conducted face-to-face with the candidates. The interviewers observe their approach to articulating a question, deciphering, and solving it. They note every word and step taken by coders. They also acknowledge how often the candidates communicate and discuss their codes, uses and functionalities, which can take up to hours or even a day. Though a whiteboard coding interview is entirely unrelated to deciphering a coder’s on-the-job potential, recruiters have a soft spot for it.

There is now a growing consensus that this process is slow and unscalable. It is unable to simulate real-world problems, which negatively impacts the quality of hires. As technology becomes more affordable, and the demand for software engineers grows exponentially, writing code to test a candidate’s technical prowess on a whiteboard has become primitive.

• Traditional interviews lack transparency, are somewhat hypothetical and don’t cater to real-life scenarios. This fails to update an interviewer about a candidate’s job proficiency. For example, whiteboard coding interviews don’t mirror the job demands as they aren’t the resources coders need for actual coding. Such coding tools even filter out the best coders by making them anxious or nervous.

• There are no data-backed hiring decisions that lead to improved job outcomes. Most recruiters fail to fix critical parameters for reference and selection. Instead, they prefer easy-to-select candidates based on assumptions or intuition. This prevents organizations from identifying and hiring the best candidate for the job.

• Expenses on onsite interviews and other additional costs make the recruitment process a resource-intensive affair, financial and otherwise. The process starts with posting on job boards, reviewing applications, pre-screening steps to interview arrangements, onsite interviews, and finally, sealing the deal, including rolling out offers, negotiations and verifying the references.

Let us elucidate what a hiring manager should assess in a technical candidate during a coding interview.

It includes, and is not restricted to:

In today’s competitive scenario, hiring managers must look beyond a candidate’s resume and redundant traditional interview approaches. They need to undertake an interview approach that provides a deeper understanding of a coder’s proficiency.

• With modern code interview tools, employers can be well-informed about the coder’s rare skill set, collaboration levels, robust problem-solving ability, and analytical thinking.
• Interviewers must efficiently deduce the coder’s agility in coding, the complexity of the code used, proficiency in using features, such as online interview with Live Code Editor, auto-suggest, etc.
• A modern online coding tool for interview will evaluate how well coders can handle ambiguity. It will also highlight their attitude toward the challenge and the aptitude for learning.

Time to embrace live code interview tool as a game-changing interview approach

We understand the current scenario has disrupted the usual interview process. Hence, organizations must creatively assess candidates to improve the interviewing process for tech talent. Phenomenal tech advancements can enable companies to conduct their technical recruiting process virtually, without compromising their experience. Administering live code interview tool via online coding interview tools have lent incredible ease to the recruiters, regardless of the candidate numbers.

What is a Live Coding Interview?

A live coding interview is a next-generation candidate interview process wherein the interviewer assesses a coder’s proficiency in real-time. A prerequisite to the interview is that candidates must accept sharing their screen, video, and audio. They are then asked to code in a programming language of their choice. Aside from the fact that the interview is being hosted remotely, it is as natural as a physical interview. It is also substantially more realistic than a traditional pen and paper, whiteboard coding interview approach. It offers the interviewer an accurate idea of how a candidate thinks, collaborates, and utilizes various languages, frameworks, libraries, or APIs (Application Programming Interface).

In a live coding interview, the screen is split into three parts:

Live coding interviews often employ concepts such as pair programming interviews that mirror the coders’ real-life scenario, using the same resources people have on the job. Hence, it reduces the hiring time, without losing quality candidates, also streamlining the process.

With a shared, live development environment enhanced by audio, video, and chat, hiring managers can undertake pair programming interviews to assess real-time skills and make quality decisions for tech candidates. This efficient interview approach in today’s remote hiring environment makes for an ideal online coding interview tool.

What is a ‘Pair Programming’ Interview? 

A pair programming interview is a modern game-changing interview approach. It is also famously used as an online coding interview tool that assesses a coder’s proficiency using embedded code simulators.

How does pair programming work?

This agile and interactive practice consists of two people- the coder and the assessor. The coder writes the code, and the assessor (interviewer) guides them through the process to gauge their skills. Rather than making the candidate anxious, this concept boosts confidence by making the process quite conversational. During the interview, the interviewer and the coder can easily ask questions, voice opinions, and clear doubts about the next possible moves.

Pair programming also goes hand-in-hand with test-driven development (TDD). This means both parties get a real idea of the written code’s ability to function without errors.

Far more realistic than a whiteboard coding interview process, pair programming online gives the interviewer an accurate idea of how a candidate thinks, collaborates, and utilizes various languages, frameworks, libraries, or APIs. The pair programming interview is also possible remotely from start to finish.

Advantages of Online Pair Programming Interview as an Efficient Coding Interview Process:

Besides testing algorithmic and necessary programming skills, you can structure in-depth interviews in a real programming environment that empowers both candidates and interviewers. Online Pair coding offers various advantages.

How to Conduct Live Coding Interviews?

Businesses today need a holistic technical interviewing solution that refines the entire process, transcends conventional means, and bridges all hiring inefficiencies. How is it possible?

The answer lies in utilizing a dynamic online coding interview platform– a purpose-built, all-in-one coding interviewing platform that lets recruiters build a variety of pair coding interview questions and scenarios without having to toggle back and forth between different platforms.

By harnessing technological interventions and shifting to a new candidate assessment approach, an online coding interview platform can help meet technical assessment challenges and exceed the hiring manager and company’s expectations.

An online coding interview platform is an easy-to-use interactive environment that lets recruiters conduct online code test interviews while checking the coder’s skills, live, with ease. An online coding interview platform is a virtual, data-backed, purpose-built interviewing solution for technical roles. Unlike the traditional whiteboard coding interview approach, which tells us truly little about the candidates’ real skills, online coding interview platforms enable live coding interviews that assess the core competencies and enable a well-informed hiring decision.

It is crucial to factor in the key considerations listed below when selecting an online coding interview platform:

One of the central tendencies towards hiring is the assumption that more interviews will contribute to more hires, which seems a bit imprecise. Infact, keeping interview numbers within bounds goes a long way in ensuring that candidates fitting job requirements are worthy of consideration. This approach helps screen out undeserving participants and saves critical time and effort.

As a thumb rule, if your applicant-to-interview ratio falls anywhere between 10 to 30%, a coding interview platform will be a helpful tool to expedite the selection process. Of course, it would be better to conduct coding interviews twice before selecting a candidate, but it is crucial never to overdo it. Using a coding interview tool can help tech recruiters secure a good fit as expeditiously as possible.

What sets a good coding interview platform apart from its counterparts is its ability to provide a wide range of online coding tests that help set up test campaigns aligned to the recruiter’s specific needs – whether for full-stack, front-end or front-end or back-end development. The tool’s ability to accommodate coding problems across various frameworks and technologies attests to its effectiveness. Noteworthy here is that the assessment should match the seniority level specified by the employer and assess competencies that a prospective employee needs to perform job responsibilities.

An ideal coding interview tool must include all the features that seamlessly work with the hiring process, systematize each stage, and make things simpler for all stakeholders. In addition, recruiters would appreciate a location-agnostic tool (i.e., can be accessed remotely or on premise) to help recruiters engage meaningfully with candidates.

A feature-laden tool is the cornerstone of an impactful recruitment strategy. Wielding a coding interview tool that grants recruiters the ability to integrate with the organization’s existing system, access wide-ranging predefined assessments, prepare and customize coding challenges quickly, check plagiarisms, conduct performance benchmarking, export and share test reports is empowering.

Even though online coding assessments are imperatively necessary, ascertaining the capabilities of potential employees without a face-to-face engagement seems insufficient. The post-pandemic world cannot emphasize enough how vital remote hiring is, primarily when participants are in far-flung areas. The best coding interview platforms are designed after such requirements. A holistic coding interview platform is not reliant on third-party service providers, for example, installing third-party video chat solutions, and comes with a suite of high-performing digital tools to offer an end-to-end talent assessment solution.

• Mercer | Mettl
• CoderPad
• CodeInterview
• Testdome
• HackerRank
• CoderByte
• CodeSignal
• CodeBunk
• Devskiller

Here is a brief rundown of these tools:

Mercer | Mettl

Mercer | Mettl has a fast-growing roster of online screening tools that enable a comprehensive hiring process. Their tools independently harness the crowd’s wisdom to select eligible and qualified candidates for the interview round. A combination of application-based questions and simulation-based tests, screen and evaluate candidates quickly and fairly so that you only hire the best.

Features:

Expansive Topic Coverage

We offer an unprecedented range of programming languages and frameworks for all significant coding job roles. The diversity with which we cover every existing and new-age language, framework, technology, topic, and skills requirement at your end, is also unmatched. A rich repository of 100,000+ technical questions for 300+ skills helps test a coder’s competency at every level comprehensively. The landscape of our offerings gives an accurate picture of a candidate’s comprehensive fit for a required position. You can choose from a set of readily-available standardized tests or customize them as per your need instantaneously to assess a coder’s skill.

Mercer | Mettl I/O

Mercer | Mettl I/O is a first-of-its-kind, all-in-one coding assessment platform. This highly sophisticated and customizable tool assesses programming ability by providing a comprehensive coding environment for all major programming roles (Front-end, back-end, database, full-stack, data science, DevOps, QA engineers etc.), supporting all major languages and technologies. You name it, and we have it. Mercer | Mettl I/O is well-suited for simplifying and improving lateral hiring processes at a large and small scale. In-built with real-time, insightful reports, this efficient screening tool auto-evaluates codes and provides the best online interview coding tool integrated development environments (IDE) that measure an experienced candidate’s actual ability.

Codelysis for Campus Hiring

Mercer | Mettl’s coding platform is embedded with a list of simulators evaluating a fresh coder’s hands-on coding skill in various languages. Simulators give recruiters the liberty to test fundamental coding skills in over 20 programming languages with a supremely user-friendly interface. Codelysis enables assessing and hiring the best freshers at scale.

The simulator assessment is incorporated with a few much-needed state-of-the-art features such as:

Plagiarism checker- It detects partially similar coders and codes copied from the Internet, ensuring better decision-making.

Intellisense- It is an auto-complete feature that automatically recommends language-specific context-driven suggestions at specific syntax points. It can be activated if required.

If you are looking to know the candidate’s thought process and how he/she executed the entire program, a full video of code recorded at each keystroke is available using Code Playback. This feature shows the video of the evolution of code at each compilation. Hence, another way to evaluate on-the-spot proficiency and a coder’s capability to code in the desired language.

CoderPad

CoderPad is an increasingly popular interview tool that found favor among tech recruiters and companies. Dropbox, YCombinator, Yelp, and Quora are some leading companies that already use the tool to conduct virtual technical interviews. The tool seamlessly integrates with leading recruitment software, such as Smart Recruiters, Greenhouse, etc., enabling employers to schedule their technical interviews within their software.

Features

• Supports over 30 programming languages
• Includes audio, video, and drawing mode for interviews

CodeInterview

CodeInterview is a cloud-based pair programming tool to conduct coding interviews. The platform appeals to many small business companies and individuals with a flexible pricing plan. It supports over ten languages and comes with a powerful code editor and a user-friendly interface. In addition, CodeInterview has features galore, such as audio and video interview features, the option to create question library and code snippets, etc. Since, it is a cloud-based tool, it does not require installation, and everything happens in a browser.

Features

• Support in over 25 languages
• Includes audio and video mode and the facility to replay interviews

Testdome

Testdome is a holistic coding interview tool that employs custom evidence-based hiring methodology to make well-informed hiring recommendations. Testdome is also a valuable tool for job seekers, offering them free certifications if they complete coding challenges for any given programming framework, language, etc. Testdome’s significant clients include PayPal, eBay, etc.

Features

• Skills test library and customizable skills tests
• API accessibility and ATS integration

HackerRank

HackerRank is widely popular as a recruitment tool with customized and advanced features galore. HackerRank encompasses three distinct tools, namely Insights, CodeScreen, and CodePair. The comprehensive platform provides a live coding platform for administering technical interviews online. It is a cost and time-efficient means to assess candidates remotely. The platform enables the interviewers to evaluate a participant’s problem-solving and coding skills in real-time.

Features

• Includes an online interview tool and tests
• Offers enterprise-grade features

CoderByte

This feature-laden code assessment platform allows recruiters to schedule interviews remotely in real-time. After shortlisting eligible candidates, recruiters can utilize CoderByte to create interview templates and launch various whiteboard sessions. It also allows for code-pairing with a specific candidate in real-time. Following this session, recruiters can also replay the session to ascertain better whether a candidate is aligned to the company culture and possesses skills aligned with a job position.

Features

• Live video interviewing platform
• Enables recording of live interviews for future reference

CodeSignal

CodeSignal is another cloud-based interview tool to conduct high-stakes technical interviews at scale. It offers a comprehensive coding environment that seems like Visual Studio Code yet includes features such as running unit tests, debugging mistakes, etc. Code Signal’s intuitive, easy-to-use platform helps bridge the gap between a recruiter and a candidate. Recruiters can gauge candidate skills via different algorithmic questions and coding tasks embedded within the tool.

Features

• Offers its integrated development environment (IDE)
• Provides subject matter experts (SMEs) support to create customized tests

CodeBunk

CodeBunk is a comprehensive coding interview tool to streamline the remote process of hiring developers. Perfectly suited for tech recruiters, CodeBunk is an all-in-one solution that includes a real-time editor, compilers, centralized repository, question banks, etc. The platform features enable recruiters to conduct a fair skill assessment during a live interview and ensures transparency in recruitment.

Features

• Provides live video and live chat features
• Offers code teaching functionality

Devskiller

Devskiller is a technical screening tool to help recruiters interview and screen candidates for finding the best tech talent. It includes two programs within its ambit: TalentScore and TalentBoost. The former is a tool to screen and interview developers, and the latter is a beneficial tool to help organizations hire, upskill, and map out career paths for their employees.

Features

• Provides hackathon platform for remote talent sourcing initiatives
• Provides coding tests available for junior, middle, and senior-level positions
• Robust anti-plagiarism tools that ensure test accuracy

Mercer | Mettl offers a unique advantage for both recruiters and candidates- The ability to administer live coding interviews quite naturally on a dynamic coding interview platform. This platform lets recruiters build various coding interviews without having to toggle back and forth between different platforms.

Mercer | Mettl’s coding interview platform grants interviewers the ability to view, interact, and supervise the coders online as they attempt programming challenges. It runs virtual technical interviews with a unified online code editor, compiler, an audio-video conferencing tool, a whiteboard, and video analytics. Functions such as multi-language support, chat support, easy API integration with ATSs, versatile coverage of coding languages, simulation, and test history, help widen a company’s talent funnel. Provisions such as location-agnostic, customization, hands-on skill support, swift auto-evaluation, result validation, and proficient tracking of the tech hiring funnel enable quality online interviewing and hiring at scale. Hence, when companies are looking to be agile, using online coding interview platform is an excellent way of evaluating the candidate while interviewing them, 

Mercer | Mettl’s coding interview platform is a state-of-the-art tool and supports more than twenty popular programming languages. It works well with the code editor, code executor and code intelligence. This live coding interview platform comes as a boon for tech recruiters to accurately evaluate the coding skills of the interviewees. The platform offers a vast array of coding skills tests and an advanced coding simulator and video interview questions for an in-depth assessment of the candidates’ coding skills within the given time. It also includes:

Data Analysis: 

The live coding interview platform also gives interviewers the option to assess candidates using data from previous screening rounds on the same platform. This comprehensive assessment with feedback from multiple rounds makes interview analysis and decision-making reliable, fast, and way more effortless than before.

Digital Ideation Using Inbuilt Interactive Whiteboard and Notepad:

Interactive whiteboard and notepads on the coding interview platform act as collaborative substitutes to share, draw, discuss, decipher, and digitally ideate with your candidates as smoothly as you would offline but with a little more flexibility.

Comprehensive Scoring and Reporting:

Understanding the strengths and vulnerabilities of the coders is vital for making the right hiring decision.

It will be a beneficial method if you want to conduct remote interviews with the ease of face-to-face interviews. Live coding interviews provide you with some excellent tools such as live coding evaluator, collaborative tools like notepad and whiteboard that simulate face-to-face interview processes.

• Where do coders write their codes on an online coding interview platform?

The online coding interview platform enables coders to type their responses by giving them access to coding editors on the simulator screen.

• What coding language is used for technical interviews?

Mercer | Mettl’s online coding interview platform is language agnostic. With access to more than 20 programming languages, the platform’s language tool enables the coders to code in a language of their preference.

Under this system, you can predefine the set of interview questions for each of the defined competencies for a specific role. You are then required to record a clear video response for each of the given problems and save it systematically on the platform. After the interviewee has submitted the answers, evaluate the video responses as per your convenience.

Downturns and fluctuations in the job market are part and parcels of economic activities. Still, with this pandemic, we realized how important it is to identify alternative courses of action and stay prepared in advance. With in-person meetings and regular social interaction taking a back seat during a crisis, it is mission-critical for companies to adopt digital technology to conduct job interviews (technical or non-technical) smoothly. It is undeniable that recruiting processes need to go online in the time of social distancing.

However, much has changed in the tech-hiring landscape over the past few years. It is just that we have come to realize off late that online coding interview tools are a pressing priority for the hiring industry. Such tools are enabling hiring managers to conduct interviews and connect with the candidates in real-time. This move will bolster the recruitment strategy, not only now but even after normalcy is restored, avoiding any unforeseen disruptions.