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Free technical assessment
Find Your Gaps To Senior Engineer.
In 10 minutes or less. 36 questions. See how you compare to 10,000 other JavaScript Engineers worldwide.
- Find out your real gaps to Senior.
- Know what to focus on next.
- See how you stand vs JS Engineers worldwide.



















10,000+ software engineers already took the assessment.
Rated Excellent onTrustpilotBased on 151 reviews.
See Where You Stand
10,012 engineers found their gaps
“I went from aimless greenfield feature development, low in confidence and anxious about being replaced, to genuinely understanding systems thinking, performance, and scalability.”

Jerico Cabatingan
Software Engineer
United Kingdom
“After one year in the program I started feeling more confident, able to resolve problems effectively… I received an offer for a full-stack position and almost doubled my salary.”

Salvatore Olivieri
Senior Full-Stack Engineer
Italy
“From 7 years at a company with a burnout-inducing pace to a senior role with a tech stack and culture that align with my interests — and a 40% pay increase, well beyond what I first aimed for.”

Celina Kilcrease
Senior Software Engineer
United States
“Every single topic is focused on the fundamentals. There's a lot of depth — it's the kind of senior thinking I was missing before I joined.”

Matt Colozzo
Full-Stack Engineer
United States
Find your AI replacement risk.
AI Replacement Risk
Senior Level Thinking. Senior Level Results.
From Bootcamp WebDev to Confident Full Stack Engineer
“I came into web development as a career changer through a bootcamp. Luckily landed my first job around the same time GPT landed, and learned the ropes as fast as I could but with heavy assistance from AI. But deep down, I never really felt confident in my fundamentals. Their program taught me all the things I felt I was missing. I went from aimless feature development, anxious about being replaced, to genuinely understanding systems thinking, performance, and scalability.”

Level-up your Software Eng Career
“Bogdan and Dragos have put together an excellent resource to help engineers who are struggling to land interviews and/or level up. After joining, I learned how to write an effective resume, how to tell the kinds of stories hiring managers want to hear, how to study for and pass technical interviews, and how to be a better Software Engineer across the full stack.”

Best community for Software developers
“I have been part of TheSeniorDev.com for three years now, and it's one of the best communities for software developers. Every year, Bogdan and Dragos update content, which keeps me constantly up to date with new trends and market situations. I'm surrounded by developers who want to succeed, which motivates and pushes me to succeed as well.”

“Thrilled to share that I received an offer from a company I'm really excited about! After joining this community, the interviews felt very conversational.”
“At the beginning of the year I focused on searching for a new job, and found the one. I'm now working at the biggest online education platform in Poland.”
AC
Adam Cygan
Frontend Engineer
Gliwice, Poland
One year to level up: my road to senior
“That experience left me feeling confused, insecure, and full of self-doubt. I was stuck in tutorial hell and endless side projects. I started this program because I wanted to master end-to-end delivery and stop settling for second-tier companies. After one year I started feeling more confident, able to resolve problems effectively, and received an offer for a full-stack position.”

That was a great journey
“I had a great experience with the mentoring program at theSeniorDev. The program is full of valuable knowledge, clear explanations, and practical guidance. My mentors not only helped me resolve doubts but also kept me focused and moving toward my goals. I highly recommend this program to anyone who wants to grow as a developer.”

120K → 180K · big tech
“Every single topic is focused on the fundamentals. There's a lot of depth.”
Back for round two
“I first came across this program in 2021 when I was unhappy with my pay and position. Going through the program offered me the skills, confidence, community and mentorship I needed, and I found a new position at a larger company. I'm currently back in the program, as I want to improve my frontend skills. This program works — there is no magic formula, it lays down strong foundational skills.”

Met the team“No matter what the question was, I had an answer.”
AA
Akua Appiah-Lindberg
Full-Stack Engineer
Berlin, Germany
Excellent program
“When I joined the course, I was stuck in my career, and I had a lot of blind spots. This course and community have helped me tremendously to level up my engineering skills and command respect at my new company. I recommend this program to mid-level engineers who feel stuck in their careers and want to level up.”

“It was very concise and very precise — it helped me focus and avoid the noise.”
My honest review
“I've got to thank Dragoș and Bogdan. They really helped me learn the core concepts and fundamentals of programming. Without a solid foundation, I struggled to learn efficiently. That's what makes this program so great: it's structured in a way that just clicks. Each lesson builds on the last, so you understand why you need to learn something before moving on.”

Absolute must
“With the changing technical world, being up to date with the latest standards is paramount. Software Mastery provides this and more. Not only am I more technically sound as a developer but my confidence is greater too. If you get the opportunity, I would totally recommend this course.”

Michael Williams
Software Engineer
United Kingdom
“Enrolling in your mentoring program is one of the best decisions I've made in my software career.”
AZ
Alex Zahar
Full-Stack Developer
Munich, Germany
“Next week I start a new job as a Senior Frontend Developer — the highest salary I've obtained in more than 20 years of professional web development.”
A worthwhile journey
“The curriculum is top notch. It is intensive but there are a lot of important concepts to learn and transform your career. Great support from the tutors. I acquired a lot of knowledge during the program, which makes me escalate so much more in my career as a developer.”

100% worth the money
“I have never encountered anything like Software Mastery on the market. The knowledge I've gained would have taken me ten years to acquire through hands-on work experience. Dragos and Bogdan have created a clear roadmap for developers to enhance their skills, and they provide assistance and feedback at every stage of the learning process.”

For transparency: theSeniorDev launched in 2020 as “CodeWithDragos”. A handful of older reviews mention that original name — we've updated those mentions to theSeniorDev for clarity. The reviews are otherwise unedited and verifiable on Trustpilot.

