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Master Professional English
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Real-world exercises built from actual tech documentation, code reviews, Jira tickets, and pull requests. Tailored for developers, QA engineers, DevOps, data scientists, and all IT specialists.

800+ IT vocabulary terms
32 exercise categories
24 IT roles covered
20 languages supported
Illustration of a code editor window next to a speech bubble, representing IT professionals learning English communication skills alongside their coding work
Learn English vocabulary and communication skills side by side with your daily coding work.
Word of the Day
TDD
/tiː diː diː/

Test-Driven Development — write a failing test first, then the minimum code to pass it, then refactor.

Example: "Red (failing test), Green (pass), Refactor — the TDD cycle keeps us from shipping untested code."

Choose Your Learning Path

Role-specific vocabulary, exercises, and scenarios — because a DevOps engineer and a UX designer have very different English needs.

Generic English courses teach you how to order coffee or write a formal letter. We teach you how to write a clear bug report, present at a tech demo, read an RFC, and ace your system design interview.

Learn more about the project →
From a real GitHub PR review:
// Exercise: Choose the correct phrase
// to complete the code review comment.

"This function is _____ because it
modifies the input array directly."

A) idempotent
B) pure
C) impure  ← ✓
D) asynchronous
#code-review #vocabulary Intermediate

Quick Glossary

IT English terms explained in plain language — with pronunciation and real-world examples.

  • idempotent adj.
    /ˌaɪ.dəmˈpoʊ.tənt/

    Producing the same result no matter how many times it is performed. PUT requests should be idempotent.

  • backpressure n.
    /ˈbækˌpreʃ.ər/

    Resistance that limits data flow to prevent overwhelming a consumer, e.g. in a message queue.

  • SLO n.
    /ˌes.el.ˈoʊ/

    Service Level Objective — a target value for a reliability metric such as 99.9% availability.

  • refactoring n./v.
    /ˌriːˈfæk.tər.ɪŋ/

    Restructuring existing code to improve its internal structure without changing its external behaviour.

  • race condition n.
    /ˈreɪs kənˌdɪʃ.ən/

    A bug where behaviour depends on the unpredictable timing of concurrent operations.

What IT Professionals Say

From developers and engineers who use this platform to sharpen their professional English.

  • "Before this site I avoided writing in English — now I write PR descriptions and Slack messages without hesitation. The exercises are exactly what you need at work, not in a classroom."

    Dmytro K.
    Senior Backend Developer · Kyiv → Berlin
  • "The vocabulary modules are brilliant. DevOps terms, Git commands, SLO/SLI — it explains the English behind concepts I already know technically. My on-call hand-offs are much clearer now."

    Priya M.
    SRE Engineer · Bengaluru
  • "I used this to prepare for interviews at international companies. The STAR method exercises and system design vocabulary helped me land my first English-speaking job offer."

    Taras H.
    Full-Stack Developer · Lviv → Amsterdam
  • "As a QA engineer, I write bug reports every day. After going through the writing exercises I can write clear, reproducible reports that developers actually act on. Fewer clarification questions means faster fixes."

    Anastasiia V.
    QA Engineer · Kharkiv
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Frequently Asked Questions

Everything you need to know about learning IT English on this platform.