Free technical assessment — find your gaps to senior engineer

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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.

We'll send you the results by email · Unsubscribe any time.

10,000+ software engineers already took the assessment.

// 01 — COMPETITIVE BENCHMARK

See Where You Stand

See how you’re doing vs thousands of other software engineers.

EARLY JUNIORJUNIORMIDLEVELUPPER MIDSENIOR0204060801000TH20TH40TH60TH80TH100THPERCENTILESCOREYOU14Bottom 5%
I wanted to fill my gaps to the Senior level.
Chris Joiner
Senior Frontend Engineer · York, UK 🇬🇧
I wanted to fill my gaps…

// 02 — TARGETED SKILL ANALYSIS

In-Depth Skill Analysis

  • JavaScript Fundamentals
  • AI Engineering & ToolingNew
  • Frontend & Component Frameworks
  • Databases & API Design
  • System Design
JS FundamentalsAI ✦ NEWFrameworksAPIs & DataSystem Design

I was able to weed out all the noise…
I was able to weed out all the noise, and focus on the things that were important.
Kirsten Lee Burton
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.

New

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.
Arti Mathanda
Full-Stack Engineer · London, UK 🇬🇧
I filled the gaps in my knowledge…

Find your AI replacement risk.

Early Junior 😱Junior 🥺Mid-Level 😐Upper Mid 🙂Senior 😎HIGHLOW

AI Replacement Risk


Excellent · 4.9 out of 5

on Trustpilot

Direction and guidance

They stay up to date with the AI frenzy, have weekly meetups and respond promptly to all questions.
Kendall 🇺🇸Verified review

// 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

theSeniorDev

$ built by engineers, for engineers

Disclaimer: This website and program are operated by theSeniorDev.com. All content is provided for educational and informational purposes only. While many of our students have successfully advanced to Senior-level roles, individual results will vary based on factors such as prior experience, commitment, market conditions, and personal effort. We do not make any guarantees regarding employment, promotions, or specific income levels.