← ALL SUCCESS CASES

CASE FILE · COHORT 2023

Michael Williams

// Frontend Developer · London, UK

Salary increaseNew job

THE STORY

Michael’s Path To Senior

  1. 01

    Michael's interviews in London used to be a lottery. Hope the questions land on what you know.

  2. 02

    He removed the luck: JavaScript, React, architecture. Drilled with interview practice until there were no gaps for the questions to land on.

  3. 03

    'I was confident I can answer any interview question.' His words.

  4. 04

    New job, salary up. No lottery.

WHAT MICHAEL MASTERED

React depthJavaScript internalsState managementTypeScriptFrontend system designPerformance & Core Web Vitals
I was confident I can answer any interview question.
MICHAEL WILLIAMS

Find Your Gaps To Senior.

20 minutes, zero fluff. Test yourself on the same dimensions Michael mastered — and get a breakdown of exactly what to work on next.

Dragos and Bogdan Nedelcu, founders of theSeniorDev

Your Skill Breakdown

Architecture46%
System Design34%
Testing & CI71%
AI Fluency28%

THE OUTCOME

What changed at Senior level

SALARY

Substantial increase

ROLE

Landed a new role

IN MICHAEL’S WORDS

I was confident I can answer any interview question.

THE SENIOR JOURNEY

The senior skills Michael built

Getting to senior isn’t about learning another framework. Michael’s path covered the dimensions that actually move an engineer up a level — the same areas theSeniorDev coaches every member through:

01

System Design & Frontend System Design

Michael learned to lead system design and frontend system design discussions — scalability, data flow, and architecture trade-offs — the conversations that separate a senior frontend developer from a mid-level one.

02

Technical & Live-Coding Interviews

Instead of memorising answers, Michael built a repeatable process for technical interviews, live-coding challenges, and take-home tasks — shipping production-ready solutions under pressure.

03

Fundamentals: Testing, Performance & Software Architecture

Michael went deep on the senior fundamentals — testing, performance, and software architecture — and the mental models that outlast any framework or library.

04

CS Foundations: Data Structures & Algorithms

Michael closed the data structures and algorithms gaps that self-taught and bootcamp paths leave behind, and started solving problems by reasoning rather than recall.

05

Selling Yourself & Communicating Senior-Level Value

Michael learned to communicate real engineering value — a senior-level CV, LinkedIn, and STAR interview stories — so the level showed long before the offer landed.

A preview of the free Senior training

Free Senior Training.

One session, the whole system: the fundamentals, the interview strategy, and the plan Michael followed to the offer. Watch it free.