Free technical assessment
Find Your Gaps To Senior Engineer.
- Find out your real gaps to Senior.
- Know what to focus on next.
- See how you stand vs JS Engineers worldwide.
// 01 — COMPETITIVE BENCHMARK
See Where You Stand
See how you’re doing vs thousands of other software engineers.
I wanted to fill my gaps to the Senior level.
Senior Frontend Engineer · York, UK 🇬🇧
// 02 — TARGETED SKILL ANALYSIS
In-Depth Skill Analysis
- JavaScript Fundamentals
- AI Engineering & ToolingNew
- Frontend & Component Frameworks
- Databases & API Design
- System Design
I was able to weed out all the noise, and focus on the things that were important.
Senior Frontend Engineer · NYC, USA 🇺🇸
// 03 — INTERVIEW READINESS
Based On Real Interview Questions
We built this after analyzing hundreds of real technical interviews.
Algorithms & Data Structures
The patterns interviewers reach for — and when they actually matter.
Frontend Mastery
Components, rendering and state the way production frontends demand.
Fullstack Thinking
Wiring frontend, API and database into one coherent feature.
System Design
Scaling, data flow and the trade-offs seniors reason about out loud.
Software Architecture
Designing systems that scale past the whiteboard sketch.
AI Engineering
Building with LLMs, tools and agents — the skill every senior now needs.
I filled the gaps in my knowledge with clear direction and guidance.
Full-Stack Engineer · London, UK 🇬🇧
Find your AI replacement risk.
AI Replacement Risk
Excellent · 4.9 out of 5
“Direction and guidance”
They stay up to date with the AI frenzy, have weekly meetups and respond promptly to all questions.
// SOURCE: TRUSTPILOT · PULLED 2026-06-10
// THE COMMUNITY — REAL MEMBERS, WORLDWIDE
Join 450+ engineers already on the path
Join a community of like-minded devs fast-tracking to Senior level.
Andres
Fort Lauderdale, Florida, USA 🇺🇸
Celina
“Thrilled to share that I received an offer from a company I'm really excited about!”
Senior Software Engineer · New York 🇺🇸
Daniel
Miami, USA 🇺🇸
David
Salt Lake City, USA 🇺🇸
Desmend
“The biggest thing is I finally got the Senior title.”
Senior Full-Stack Engineer · Chicago, USA 🇺🇸
Erik
Idaho, US 🇺🇸
Froi
Atlanta, USA 🇺🇸
Geetika
Fremont, California 🇺🇸
Irmantas
Palms Harbor, USA 🇺🇸
Jenise
“I found myself kind of like a 'perpetual Junior'. I was looking for something to get out of there.”
Remote Frontend Engineer · Maryland, USA 🇺🇸
Jerry
Naples FL, USA 🇺🇸
Kendall
Charlotte, USA 🇺🇸
Mark
“I finally received my first offer and signed it. The frontend system design video you put on YouTube was so helpful.”
Staff Frontend Engineer · Santa Rosa 🇺🇸
Matt
“Not only do they have the proper experience, they also put that into the program.”
Senior Full-Stack Engineer · New York, USA 🇺🇸
Matthew
San Francisco, California 🇺🇸
Nnamdi
“The hiring manager said they'd never heard anyone talk about this in this way. I'm much better technically now.”
Full-Stack Developer · Ohio, USA 🇺🇸
Tanya
Atlanata, USA 🇺🇸
Tyler
Michigan, USA 🇺🇸
Valeria
“It was the difference between just surviving and truly thriving as a developer.”
Lead Frontend Engineer · Texas, USA 🇺🇸
Antonio
Guildford, England (UK) 🇬🇧
Anvarjon
London, UK 🇬🇧
Armando
London, United Kingdom 🇬🇧
Ben
London, United Kingdom 🇬🇧
Bojin
Newhaven, England, United Kingdom 🇬🇧
Brenda
“It was very concise and very precise — it helped me focus and avoid the noise.”
Senior Software Engineer · London, UK 🇬🇧
Carl
Wellingborough, United Kingdom 🇬🇧
Christopher
Worcestershire, United Kingdom 🇬🇧
Daniel
London, UK 🇬🇧
Demetrios
London, UK 🇬🇧
Hiral
“I have accepted the job offer and will be joining my new job soon.”
Software Engineer · Reading 🇬🇧
Ioana
“You guys really want us to succeed, and you want us to do well.”
Full-Stack Developer · London, UK 🇬🇧
Jack
“I've accepted an offer as a Senior Software Engineer.”
Senior Software Engineer · Edinburgh 🇬🇧
Jerico
“I've landed in a job where I could really see myself for the next five or so years. I like the team. I like the product.”
Full Stack Developer · Birmingham, UK 🇬🇧
Leopold
London 🇬🇧
Lerena
London, UK 🇬🇧
Lucian
“My salary improved by around 80%. This is amazing.”
Full-stack Developer · London, UK 🇬🇧
Marius
London, UK 🇬🇧
Natalia
Orpington,UK 🇬🇧
Patrick
London, UK 🇬🇧
Pepa
London, England, United Kingdom 🇬🇧
Ramya
London, UK 🇬🇧
Sean
Abergavenny, Wales, United Kingdom 🇬🇧
Stephen
London, UK 🇬🇧
Sunny
London, UK 🇬🇧
Tasnim
“If you join, you've got very motivational mentors who will work hard to help you get there.”
Full-Stack Developer · London, UK 🇬🇧
Zoe
Sutton, England, United Kingdom 🇬🇧
Adam
“At the beginning of the year I focused on searching for a new job, and found the one.”
Frontend Engineer · Gliwice 🇵🇱
Adrien
“Here we are: an offer for a Senior Front-End Dev position. What a journey! There's no way I'd have got near this without theSeniorDev's Software Mastery.”
Senior Front-End Developer · Barcelona 🇪🇸
Andrei
Kassel, Germany 🇩🇪
Angelo
“I received a job offer today for a frontend developer position. Thank you for all your help!”
Frontend Developer · Berlin 🇩🇪
Anna
Berlin, Germany 🇩🇪
Anna
Landgraaf, the Netherlands 🇳🇱
Aruna
Helsinki, Finland 🇫🇮
Barbara
“I'll be moving into a mid-level position with a meaningful raise over my previous job, plus strong benefits.”
Frontend Developer · Copenhagen 🇩🇰
Benoit
Zambujeira do Mar, Portugal 🇵🇹
Carla
Lisbon, Portugal 🇵🇹
Dana
Bucharest, Romania 🇷🇴
Daniel
“I'm much more confident about my skills and my mind is much much better.”
FullStack Software Engineer · Cracow, Poland 🇵🇱
Diana
Bucharest, RO but transitioning to Amsterdam, NL 🇳🇱
Diana
“I just signed a new contract! I'll start as a Front End Software Engineer in January with a significant raise.”
Front End Software Engineer · Lisbon 🇵🇹
Duc
Kokkola, Central Ostrobothnia, Finland 🇫🇮
Eliseo
“I went through a lot of interviews and accepted an offer as a Fullstack Engineer with a frontend focus.”
Fullstack Engineer · Berlin 🇩🇪
Emily
Barcelona, Spain 🇪🇸
Georg
Barcelona, Remote 🇪🇸
Gert-Jan
Raalte, Netherlands 🇳🇱
Giuliano
Milan, Italy 🇮🇹
Guido
“At work I feel much more confident. I got much better at technical interviews — and I got a new job.”
Frontend Developer · Italy (Remote) 🇮🇹
Hiu
Berlin, Germany 🇩🇪
Joao
“I really shined, mainly because of the mentorship.”
Senior Developer · Portugal (Remote) 🇵🇹
Jorge
berlin 🇩🇪
Katarina
“I finally got an offer for a Senior Frontend Engineer position! My confidence is the highest it's ever been.”
Senior Frontend Engineer · Berlin 🇩🇪
Lefora
Berlin, Germany 🇩🇪
Lenka
“I was stuck and didn't know what to do next, or how to get to a more senior position.”
Full-Stack Engineer · Prague, Czech Republic 🇨🇿
Manuele
“After being laid off and 140 applications, I got an offer from a French software company.”
Web Developer · Vannes 🇫🇷
Mariyana
“It's a Senior Frontend Engineer role. Thanks for the support throughout — Software Mastery really works!”
Senior Frontend Engineer · Baarn 🇳🇱
Matthieu
“It's definitely worth the investment.”
Frontend Engineer · Berlin 🇩🇪
Mattia
“I just accepted an offer for a fully remote Frontend Engineer role. Just a few weeks ago, it felt far away.”
Frontend Engineer · Vicenza 🇮🇹
Mauro
“Next week I start a new job as a Senior Frontend Developer — the highest salary I've obtained in more than 20 years…”
Senior Frontend Developer · Asti 🇮🇹
Michele
Rovereto (TN), Italy 🇮🇹
Miguel
Lisbon, Portugal 🇵🇹
Nadia
Munich, Bavaria, Germany 🇩🇪
Neeraj
“This course and community have helped me tremendously to level up my engineering skills and command respect at my new company.”
Senior Frontend Engineer · The Hague 🇳🇱
Nico
“The most impressive side was the job search and interview preparation.”
Senior Software Engineer · Madrid, Spain 🇪🇸
Ninad
“Laid off twice, then a new job with a meaningful raise.”
Fullstack Developer · Berlin 🇩🇪
Nindya
“I got the interview because of the CV, and I used the methods from the program.”
Senior Frontend Developer · Berlin 🇩🇪
Oana
Craiova, Romania 🇷🇴
Paolo
“I just signed two important contracts with two clients, with a 20–30% increase to my rate — mainly thanks to the new…”
Senior Software Engineer · Saluzzo 🇮🇹
Parinaz
“I understood things much better and in depth, and my skills improved a lot.”
Senior Developer · Berlin, Germany 🇩🇪
Piotr
Berlin, Germany 🇩🇪
Raffaele
“I'll be joining my new company in charge of leading the whole Frontend Development.”
Frontend Lead 🇮🇹
Razvan
Bucharest, Romania 🇷🇴
Salvatore
“I received an offer for a Senior Full Stack role, fully remote.”
Senior Full-Stack Software Engineer · Padua 🇮🇹
Scott
Amsterdam, North Holland, Netherlands 🇳🇱
Sofia
“I accepted the offer and signed the contract — a great role with lots of responsibility as a product engineer.”
Product Engineer · Berlin 🇩🇪
Sophie
Amsterdam, Netherlands 🇳🇱
Steffen
“I got a promotion and a clear focus.”
Frontend Developer · Hamburg, Germany 🇩🇪
Suma
Ireland 🇮🇪
Thales
Porto, Portugal 🇵🇹
Uros
Barcelona, Spain 🇪🇸
Valentina
Wolfsburg, Germany 🇩🇪
Willame
Porto, Portugal 🇵🇹
Yagnalakshmi
Haarlem, Netherlands 🇳🇱
Bandita
Greater Brisbane Area 🇦🇺
Frances
Auckland, New Zealand 🇳🇿
Irene
Melbourne, AU 🇦🇺
Alejando
Chile 🇨🇱
Andy
“The peace of mind of knowing you have someone to ask has already made it worth doing.”
Freelance Frontend Engineer · Dublin, Ireland
Carlos
“I accepted the offer and started this week.”
Senior Full-Stack Developer · Santiago 🇨🇱
Gabriel
Medellin, Colombia 🇨🇴
Garry
Toronto, Canada 🇨🇦
Goksen
“I was able to build a really strong foundation and feel very confident about my knowledge and experience.”
Frontend Engineer · Amsterdam
Jaime
Medellín, Colombia 🇨🇴
Juliana
“I've just got my offer! Amazingly, basically exactly what I wrote as my objective: '3 months from now.'”
Senior Founder Engineer · São José dos Campos 🇧🇷
Kristi
Brunswick, Lower Saxony, Germany 🇩🇪
Kyviv
“They really have created something not replicable by any institution. Thank you for saving my career!”
Senior Full-Stack Developer 🇦🇮
Marcus
Lindau, Germany 🇩🇪
Mateusz
“Today I accepted an offer for a full-stack developer position that completely blew my mind — a big, stable company…”
Full-Stack Developer · Český Těšín 🇨🇿
Michael
Nathan
Hong Kong 🇭🇰
Ranis
Dubai, UAE 🇦🇪
Rene
Dubai, UAE 🇦🇪
Shelly
Japan 🇯🇵
Stefan
Hess, Germany 🇩🇪
Sumbal
Sunatullo
Kasan, Qashqadaryo Region, Uzbekistan 🇺🇿
+345 more engineers
from San Francisco to London to Hong Kong