Jobs & Careers
7 Mistakes Data Scientists Make When Applying for Jobs
Image by Author | Canva
The data science job market is crowded. Employers and recruiters are sometimes real a-holes who ghost you just when you thought you’d start negotiating your salary.
As if fighting your competition, recruiters, and employers is not enough, you also have to fight yourself. Sometimes, the lack of success at interviews really is on data scientists. Making mistakes is acceptable. Not learning from them is anything but!
So, let’s dissect some common mistakes and see how not to make them when applying for a data science job.
1. Treating All Roles the Same
Mistake: Sending the same resume and cover letter to each role you apply for, from research-heavy and client-facing positions, to being a cook or a Timothée Chalamet lookalike.
Why it hurts: Because you want the job, not the “Best Overall Candidate For All the Positions We’re Not Hiring For” award. Companies want you to fit into the particular job.
A role at a software startup might prioritize product analytics, while an insurance company is hiring for modeling in R.
Not tailoring your CV and cover letter to present yourself as highly suitable for a position carries a risk of being overlooked even before the interview.
A fix:
- Read the job description carefully.
- Tailor your CV and cover letter to the mentioned job requirements – skills, tools, and tasks.
- Don’t just list skills, but show your experience with relevant applications of those skills.
2. Too Generic Data Projects
Mistake: Submitting a data project portfolio brimming with washed-out projects like Titanic, Iris datasets, MNIST, or house price prediction.
Why it hurts: Because recruiters will fall asleep when they read your application. They’ve seen the same portfolios thousands of times. They’ll ignore you, as this portfolio only shows your lack of business thinking and creativity.
A fix:
- Work with messy, real-world data. Source the projects and data from sites such as StrataScratch, Kaggle, DataSF, DataHub by NYC Open Data, Awesome Public Datasets, etc.
- Work on less common projects
- Choose projects that show your passions and solve practical business problems, ideally those that your employer might have.
- Explain tradeoffs and why your approach makes sense in a business context.
3. Underestimating SQL
Mistake: Not practicing SQL enough, because “it’s easy compared to Python or machine learning”.
Why it hurts: Because knowing Python and how to avoid overfitting doesn’t make you an SQL expert. Oh, yeah, SQL is also heavily tested, especially for analyst and mid-level data science roles. Interviews often focus more on SQL than Python.
A fix:
- Practice complex SQL concepts: subqueries, CTEs, window functions, time series joins, pivoting, and recursive queries.
- Use platforms like StrataScratch and LeetCode to practice real-world SQL interview questions.
4. Ignoring Product Thinking
Mistake: Focusing on model metrics instead of business value.
Why it hurts: Because a model that predicts customer churn with 94% ROC-AUC, but mostly flags customers who don’t use the product anymore, has no business value. You can’t retain customers that are already gone. Your skills don’t exist in a vacuum; employers want you to use those skills to deliver value.
A fix:
5. Ignoring MLOps
Mistake: Focusing only on building a model while ignoring its deployment, monitoring, fine-tuning, and how it runs in production.
Why it hurts: Because you can stick your model you-know-where if it’s not usable in production. Most employers won’t consider you a serious candidate if you don’t know how your model gets deployed, retrained, or monitored. You won’t necessarily do all that by yourself. But you’ll have to show some knowledge, as you’ll work with machine learning engineers to make sure your model actually works.
A fix:
- Understand the three main ways of data processing: batch, real-time, and hybrid processing.
- Understand machine learning pipelines, CI/CD, and machine learning model monitoring.
- Practice workflow design in your projects by including data ingestion, model training, versioning, and serving.
- Get familiar with machine learning orchestration tools, such as Prefect and Airflow (for orchestration), Kubeflow and ZenML (for pipeline abstraction), and MLflow and Weights & Biases (for tracking).
6. Being Unprepared for Behavioral Interview Questions
Mistake: Brushing off questions like “Tell me about a challenge you faced” as non-important and not preparing for them.
Why it hurts: These questions are not a part of the interview (only) because the interviewer is bored to death with her family life, so she’d rather sit there with you in a stuffy office asking stupid questions. Behavioral questions test how you think and communicate.
A fix:
7. Using Buzzwords Without Context
Mistake: Packing your CV with technical and business buzzwords, but no concrete examples.
Why it hurts: Because “Leveraged cutting-edge big data synergies to streamline scalable data-driven AI solution for end-to-end generative intelligence in the cloud” doesn’t really mean anything. You might accidentally impress someone with that. (But don’t count on that.) More often, you’ll be asked to explain what you mean by that and risk admitting you’ve no idea what you’re talking about.
Fix it:
- Avoid using buzzwords and communicate clearly.
- Know what you’re talking about. If you can’t avoid using buzzwords, then for every buzzword, include a sentence that shows how you used it and why.
- Don’t be vague. Instead of saying “I have experience with DL”, say “I used long short-term memory to forecast product demand and reduced stockouts by 24%”.
Conclusion
Avoiding these seven mistakes is not difficult. Making them can be costly, so don’t make them. The recruitment process in data science is complicated and gruesome enough. Try not to make your life even more complicated by succumbing to the same stupid mistakes as other data scientists.
Nate Rosidi is a data scientist and in product strategy. He’s also an adjunct professor teaching analytics, and is the founder of StrataScratch, a platform helping data scientists prepare for their interviews with real interview questions from top companies. Nate writes on the latest trends in the career market, gives interview advice, shares data science projects, and covers everything SQL.
Jobs & Careers
HCLSoftware Launches Domino 14.5 With Focus on Data Privacy and Sovereign AI
HCLSoftware, a global enterprise software leader, launched HCL Domino 14.5 on July 7 as a major upgrade, specifically targeting governments and organisations operating in regulated sectors that are concerned about data privacy and digital independence.
A key feature of the new release is Domino IQ, a sovereign AI extension built into the Domino platform. This new tool gives organisations full control over their AI models and data, helping them comply with regulations such as the European AI Act.
It also removes dependence on foreign cloud services, making it easier for public sector bodies and banks to protect sensitive information.
“The importance of data sovereignty and avoiding unnecessary foreign government influence extends beyond SaaS solutions and AI. Specifically for collaboration – the sensitive data within email, chat, video recordings and documents. With the launch of Domino+ 14.5, HCLSoftware is helping over 200+ government agencies safeguard their sensitive data,” said Richard Jefts, executive vice president and general manager at HCLSoftware
The updated Domino+ collaboration suite now includes enhanced features for secure messaging, meetings, and file sharing. These tools are ready to deploy and meet the needs of organisations that handle highly confidential data.
The platform is supported by IONOS, a leading European cloud provider. Achim Weiss, CEO of IONOS, added, “Today, more than ever, true digital sovereignty is the key to Europe’s digital future. That’s why at IONOS we are proud to provide the sovereign cloud infrastructure for HCL’s sovereign collaboration solutions.”
Other key updates in Domino 14.5 include achieving BSI certification for information security, the integration of security event and incident management (SEIM) tools to enhance threat detection and response, and full compliance with the European Accessibility Act, ensuring that all web-based user experiences are inclusive and accessible to everyone.
With the launch of Domino 14.5, HCLSoftware is aiming to be a trusted technology partner for public sector and highly regulated organisations seeking control, security, and compliance in their digital operations.
Jobs & Careers
Mitsubishi Electric Invests in AI-Assisted PLM Systems Startup ‘Things’
Mitsubishi Electric Corporation announced on July 7 that its ME Innovation Fund has invested in Things, a Japan-based startup that develops and provides AI-assisted product lifecycle management (PLM) systems for the manufacturing industry.
This startup specialises in comprehensive document management, covering everything from product planning and development to disposal. According to the company, this marks the 12th investment made by Mitsubishi’s fund to date.
Through this investment, Mitsubishi Electric aims to combine its extensive manufacturing and control expertise with Things’ generative AI technology. The goal is to accelerate the development of digital transformation (DX) solutions that tackle various challenges facing the manufacturing industry.
In recent years, Japan’s manufacturing sector has encountered several challenges, including labour shortages and the ageing of skilled technicians, which hinder the transfer of expertise. In response, DX initiatives, such as the implementation of PLM and other digital systems, have progressed rapidly. However, these initiatives have faced challenges related to development time, cost, usability, and scalability.
Komi Matsubara, an executive officer at Mitsubishi Electric Corporation, stated, “Through our collaboration with Things, we expect to generate new value by integrating our manufacturing expertise with Things’ generative AI technology. We aim to leverage this initiative to enhance the overall competitiveness of the Mitsubishi Electric group.”
Things launched its ‘PRISM’ PLM system in May 2023, utilising generative AI to improve the structure and usage of information in manufacturing. PRISM offers significant cost and scalability advantages, enhancing user interfaces and experiences while effectively implementing proofs of concept across a wide range of companies.
Atsuya Suzuki, CEO of Things, said, “We are pleased to establish a partnership with Mitsubishi Electric through the ME Innovation Fund. By combining our technology with Mitsubishi Electric’s expertise in manufacturing and control, we aim to accelerate the global implementation of pioneering DX solutions for manufacturing.”
Jobs & Careers
AI to Track Facial Expressions to Detect PTSD Symptoms in Children
A research team from the University of South Florida (USF) has developed an AI system that can identify post-traumatic stress disorder (PTSD) in children.
The project addresses a longstanding clinical dilemma: diagnosing PTSD in children who may not have the emotional vocabulary, cognitive development or comfort to articulate their distress. Traditional methods such as subjective interviews and self-reported questionnaires often fall short. This is where AI steps in.
“Even when they weren’t saying much, you could see what they were going through on their faces,” Alison Salloum, professor at the USF School of Social Work, reportedly said. Her observations during trauma interviews laid the foundation for collaboration with Shaun Canavan, an expert in facial analysis at USF’s Bellini College of Artificial Intelligence, Cybersecurity, and Computing.
The study introduces a privacy-first, context-aware classification model that analyses subtle facial muscle movements. However, instead of using raw footage, the system extracts non-identifiable metrics such as eye gaze, mouth curvature, and head position, ensuring ethical boundaries are respected when working with vulnerable populations.
“We don’t use raw video. We completely get rid of subject identification and only keep data about facial movement,” Canavan reportedly emphasised. The AI also accounts for conversational context, whether a child is speaking to a parent or a therapist, which significantly influences emotional expressivity.
Across 18 therapy sessions, with over 100 minutes of footage per child and approximately 185,000 frames each, the AI identified consistent facial expression patterns in children diagnosed with PTSD. Notably, children were more expressive with clinicians than with parents; a finding that aligns with psychological literature suggesting shame or emotional avoidance often inhibits open communication at home.
While still in its early stages, the tool is not being pitched as a replacement for therapists. Instead, it’s designed as a clinical augmentation, a second set of ‘digital’ eyes that can pick up on emotional signals even trained professionals might miss in real time.
“Data like this is incredibly rare for AI systems,” Canavan added. “That’s what makes this so promising. We now have an ethically sound, objective way to support mental health assessments.”
If validated on a larger scale, the system could transform mental health diagnostics for children—especially for pre-verbal or very young patients—by turning non-verbal cues into actionable insights.
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