← ALL SUCCESS CASES

CASE FILE · COHORT 2024

Jana Kunft

// Principal Engineer · London, UK 🇬🇧

Salary increaseConfidence

THE STORY

Jana’s Path To Senior

  1. 01

    Jana wasn't chasing her first senior title. She was aiming past it.

  2. 02

    Above senior the air gets thin: fewer peers, harder decisions, no playbook. She used the coaches to pressure-test hers: architecture at scale, system design, technical strategy.

  3. 03

    She also learned to explain technical direction to people who don't write code. That's half the job up there.

  4. 04

    Today she's a Principal Engineer in London. The ladder doesn't stop at senior.

WHAT JANA MASTERED

Architecture at scaleSystem design leadershipJavaScript internalsData structures & algorithmsAPI designDatabases & SQL
Having you guys in the corner has been really great.
JANA KUNFT

Find Your Gaps To Senior.

20 minutes, zero fluff. Test yourself on the same dimensions Jana 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

TITLE

Principal Engineer

SALARY

Substantial increase

MINDSET

New confidence & clarity

IN JANA’S WORDS

Having you guys in the corner has been really great.

THE SENIOR JOURNEY

The senior skills Jana built

Getting to senior isn’t about learning another framework. Jana’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

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

02

Technical & Live-Coding Interviews

Instead of memorising answers, Jana 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

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

04

The Architect's Mindset

Jana developed an architect's mindset: making technical decisions, driving architectural discussions, and holding their own with staff engineers and CTOs.

05

Selling Yourself & Communicating Senior-Level Value

Jana 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 Jana followed to the offer. Watch it free.