# Using AI in your job application: resume, ATS, and assessments

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 Search & Selection Process
 
# Using AI in your job application: resume, ATS, and assessments

 By Ivo Donker — compiled with AI assistance (Claude & Gemini)

 

 
 The job application process is currently going through one of the fastest technological shifts ever. On the employer side, algorithms and Applicant Tracking Systems (ATS) automatically scan hundreds of resumes in a matter of seconds. On the candidate side, advanced language models like ChatGPT and Claude dash off cover letters and answers to interview questions in no time. This dynamic raises fundamental questions for candidates: How do you make sure your resume gets past an AI-driven ATS filter? How do you use generative AI for your resume and preparation without losing your authentic voice? And how do you handle AI during practical and technical assessments? This article explains in detail how automated recruitment software works, how to use AI strategically and ethically as an accelerator for your career, and where human reviewers still make the difference.
 

 
## The double AI mirror: Applicant versus recruiter

 
 When you apply for a job today, a remarkable dynamic occurs that we call the 'double AI mirror.' Both the employer and the candidate use language models to scale and optimize their processes. The employer uses AI to draft job postings, identify relevant competencies, and rank incoming profiles. The applicant, in turn, uses AI to analyze that same job posting, put together a tailored resume, and generate a tightly written cover letter.
 

 
 The risk of this parallel automation is the emergence of a hollow, synthetic communication loop. An AI-generated cover letter responding to an AI-generated job posting often results in a collection of clichés and buzzwords without substantive depth. Recruiters see hundreds of letters pass by every month containing sentences like "My passion for data-driven innovation aligns seamlessly with your dynamic organization". This kind of language is immediately recognized as the result of an uninspired prompt.
 

 
 As an applicant, you don't win the selection battle by simply producing text faster or in greater volume with AI. You win by using AI as an analyst and structurer, while adding the actual evidence, context, and human nuance yourself. If you want to know how to break down the expectations in a job description and trace them back to concrete requirements, check out the guide on [reading AI job postings critically](https://vacatures.llmnet.nl/en/ai-vacatureteksten-lezen) for tracing back the real requirements.
 

 
## ATS in 2026: How automated selection really works

 
 Persistent myths exist about how Applicant Tracking Systems (ATS) such as Greenhouse, Workday, or Lever process resumes. Many applicants still think in terms of old-fashioned, exact 'keyword density.' They try to repeat keywords as often as possible or hide white text at the bottom of their document. In the current generation of recruitment software, this is not just useless — it often backfires.
 

 
 Modern ATS platforms use semantic parsing and vector embeddings. The system doesn't just look at the exact word "Python," but understands the conceptual connection with terms like "Pandas," "Scikit-Learn," "FastAPI," and "scripting." The algorithm also analyzes the structure of the work experience: how long have you used certain technologies, in which role titles, and at what level of responsibility?
 

 
 
 
 Analysis aspect | 
 Traditional ATS (Rule-based) | 
 Modern ATS (Semantic / AI) | 
 

 
 
 
 Keywords | 
 Exact textual match required | 
 Understands synonyms and related context | 
 

 
 Document structure | 
 Trips up on tables and column layouts | 
 Extracts hierarchical entities from complex PDFs | 
 

 
 Relevance score | 
 Based on keyword frequency | 
 Based on vector similarity between profile and requirements | 
 

 
 Pitfall for the applicant | 
 Spelling errors or missed synonyms | 
 No concrete context or results attached to skills | 
 

 
 

 
 A common mistake is using graphic layouts with double columns, diagrams, or images that confuse the ATS parser. Even modern parsers can misinterpret text order when work experience is laid out in multiple columns. Always make sure to use a clean, single-column PDF or DOCX file with clear headings (such as 'Work Experience,' 'Education,' 'Skills').
 

 
## Using AI for your resume without losing authenticity

 
 Optimizing your resume with the help of language models is extremely effective, provided you give the model the right role. Never use AI as a 'ghostwriter' that makes up stories, but as an 'editor' and 'sparring partner.' The most powerful application lies in rewriting passive task descriptions into action-oriented results using the STAR method (Situation, Task, Action, Result).
 

 
 Instead of the request "Write a resume for me as an AI engineer", give the language model detailed raw information. Say exactly what you built, which problems you ran into, which metrics improved, and which technologies you used. Then ask the model to structure this raw data into strong, concise bullet points.
 

 
 Example of an effective resume-prompting strategy:

 "Below is a raw description of a project I carried out at my previous employer: [paste raw text]. Rewrite this into two tight bullet points for my resume. Focus on the actions I personally took and the measurable outcome. Use active verbs and avoid vague terms like 'helped with' or 'responsible for'."

 

 
 When you're looking for examples of how to put technical projects and the right terminology on paper, a field-specific guide can help. For an in-depth breakdown of your work experience and projects, you can consult the guide on [writing a resume for AI roles](https://vacatures.llmnet.nl/en/cv-schrijven-voor-ai-functies) to help you formulate concrete results.
 

 
## Privacy, GDPR, and data protection when prompting

 
 An underestimated risk when using commercial AI tools during a job search is data leakage and the breach of confidentiality. Both the General Data Protection Regulation (GDPR) and intellectual property rights play a crucial role here.
 

 
 When you enter raw text into free or standard consumer versions of language models, that data can be used to train future models. If your prompt includes the name of your current employer, revenue figures, internal source code, or colleagues' names, you may be violating your non-disclosure agreement (NDA). Uploading your own resume with your BSN (Dutch social security number), address details, and phone number to an unfamiliar online AI tool also carries privacy risks.
 

 
 Golden rules for data protection during your job search:

 
 
- Anonymize all text before entering it: replace company names with 'Company X,' colleagues with 'Colleague A,' and remove phone numbers and addresses.
 
- Turn off the option in the AI tool's settings that allows your data to be used for model training (chat history & training opt-out).
 
- Never enter intellectual property or confidential source code from (former) employers.
 
 

 
 As an applicant in the AI sector, you're expected to make conscious choices about data processing and privacy. Read more about responsible handling of personal data in the article about [using AI in a privacy-friendly way](https://gids.llmnet.nl/en/privacyvriendelijk-ai) to prevent sensitive data from ending up in public training sets.
 

 
## AI detectors in recruitment: Margins of error and practice

 
 With the rise of AI-generated applications, some HR departments and recruitment agencies have embraced AI detection tools. This software claims to be able to determine whether a cover letter or answer was written by a human or a machine. It's essential to understand how these tools work and where their serious limitations lie.
 

 
 AI detectors analyze text based on two important statistical metrics: perplexity (the complexity of word choice) and burstiness (the variation in sentence length and structure). Because language models are trained to statistically choose the most likely sequence of words, their text often shows low perplexity and very regular sentence structure.
 

 
 In practice, however, these detectors turn out to be particularly unreliable. They have a strikingly high error rate (false positives), especially for candidates whose native language is not Dutch or English. Non-native speakers often use more predictable, formal, and regular sentence structures, causing their authentic texts to be incorrectly flagged by detectors as 'AI-generated.'
 

 
 Progressive employers are therefore moving away from using automatic AI detectors. Instead of penalizing candidates for using a tool, they assess the candidate's consistency. If a cover letter is written in an extremely academic and lofty style, but the candidate struggles to explain those same concepts during the first conversation, doubts arise about their actual subject-matter knowledge.
 

 
## AI in technical assessments and practical assignments

 
 The technical assessment — whether it's a coding exercise on platforms like LeetCode, HackerRank, or CodeSignal, or a take-home case — is the litmus test in IT and AI job applications. The way companies handle AI use during assessments varies widely, but a clear trend is emerging.
 

 
 Instead of blocking AI tools with surveillance software (proctoring), many modern tech companies actively encourage the use of AI assistants such as GitHub Copilot or Claude during the assignment. The reasoning is simple: you'll be using these tools in your day-to-day work too, so the employer wants to see how efficiently and critically you work with them.
 

 
### The categories of assessments and permitted AI use

 
 
- Monitored live coding sessions: Here you work together with a senior engineer. Transparency is required. If you consult an AI tool, you explain what you're asking it and why.
 
- Automated platforms with proctoring: Here, the use of external tabs or Copilot may be explicitly prohibited. Breaking the rules leads to automatic disqualification.
 
- Take-home architecture & engineering cases: You get a few days to set up a system. AI use is almost always allowed, but the emphasis is on your justification of the choices you made.
 

 
 The biggest risk when using AI during an assessment is 'blind trust.' A language model often produces code that looks correct at first glance but contains subtle edge cases, performance bottlenecks, or security vulnerabilities. During the evaluation of the assignment, reviewers consistently probe into the choices made. If you can't explain why a particular algorithm was chosen or how the error handling works because the AI generated it, you'll still fail.
 

 
 To prepare yourself for the substantive requirements and practical tests, read the guide on [preparing for the technical assessment](https://vacatures.llmnet.nl/en/technisch-assessment-voorbereiden) which covers all facets of the selection process.
 

 
## AI as your personal practice partner for the interview

 
 Besides writing resumes, preparing for the job interview is perhaps the most valuable application of generative AI. Language models can serve as a patient, interactive interviewer that simulates specific roles and conversation techniques.
 

 
 To effectively simulate an interview, give the language model a detailed instruction. Enter the job description, the company's background, and the role of your conversation partner (for example, a Lead Data Scientist or an HR manager). Ask the model to ask you questions one at a time, wait for your answer, and then give substantive feedback on your answer.
 

 
 Recommended prompt for interview simulation:

 "You are a Senior Machine Learning Manager at a Dutch e-commerce company. You are interviewing me for the role of AI Engineer. Ask me 5 challenging technical and behavioral questions, one at a time. Wait for my answer before asking the next question. After my answer, give short, constructive feedback on the structure (STAR method) and content of my answer."

 

 
 Preferably use voice modes if they're available in the tool. This forces you to speak your answers out loud and in complete sentences, which helps reduce speaking anxiety and communicate your story clearly.
 

 
 For an overview of the whole preparation cycle and do's and don'ts, we refer you to the article on [applying for an AI role](https://vacatures.llmnet.nl/en/solliciteren-ai-functie) so you go in fully prepared.
 

 
## Legal protection and ethics: The EU AI Act in recruitment

 
 As an applicant, it's important to know what rights you have when employers use automated systems in Recruitment & Selection. In Europe, legislation sets strict limits on what organizations are allowed to do with algorithms.
 

 
 Under the European EU AI Act AI systems used for the recruitment, selection, evaluation, and promotion of personnel fall into the category of 'High-Risk AI Systems' (high-risk systems). This means suppliers and employers must meet strict obligations:
 

 
 
- Transparency obligation: Companies must inform candidates in advance that automated systems are being used to assess resumes or analyze video interviews.
 
- Human Oversight (Human-in-the-Loop): No significant recruitment decision (such as a rejection) may be made that is fully generated by an algorithm without a human reviewer having seen the file.
 
- Non-discrimination and audits: The models used must be demonstrably tested for bias with regard to gender, age, ethnic background, or disabilities.
 
 
 If you suspect you were rejected based on an automated profiling system without human intervention, under Article 22 of the GDPR and the provisions of the EU AI Act, you have the right to request an explanation of the logic used and to request a human review.
 

 
## Step-by-step plan: How to make the most of AI in your next job application

 
 To harness the power of artificial intelligence while avoiding all the pitfalls, here's a structured step-by-step plan for your job application process:
 

 
 
- Analyze the job posting:
 Use AI to extract the core competencies, hard skills, and non-explicit expectations from the job posting.
 
- Rewrite and enrich your resume:
 Enter your raw work experience and let the AI suggest strong, action-oriented wording. Verify every factual detail and adjust the tone to match your own voice.
 
- Check ATS-friendliness:
 Export your resume as a clean PDF with a single-column layout. Make sure all standard headings are clearly recognizable.
 
- Anonymize your input:
 Remove confidential company data, personal data, and phone numbers before entering text into external language models.
 
- Practice the interview:
 Use AI as an interactive conversation partner to sharpen your answers using the STAR method and practice subject-matter questions.
 
- Stay transparent during assessments:
 Use AI tools for practical assignments to boost your productivity, but make sure you can justify every line of generated code or text in detail.
 

 
 The conclusion is clear: AI is a fantastic lever for your job application process, but not a replacement for your unique experience, critical thinking, and human authenticity. Applicants who find the balance between technological efficiency and personal substance build an indispensable edge in today's job market.
 

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