How to Get Hired as a TypeScript Developer: Tips and Resume

Introduction: Why TypeScript is Your Ticket to IT

TypeScript (TS) is not just a "superset of JavaScript". It is a strictly typed language that reduces the number of bugs by 40-60% compared to plain JS (according to Microsoft research). Large companies (Google, Airbnb, Slack) are actively migrating to TS, and developer salaries are 15-25% higher than those of JS specialists. In this article, we will break down how to write a resume, prepare for an interview, and get your dream offer.

1. Key Skills for a TypeScript Developer

To qualify for a Junior/Middle position, you need to master not only the syntax but also the ecosystem. Here is the minimum set:

• Basic TypeScript: types (any, unknown, never), interfaces, generics, utility types (Partial, Pick, Omit).
• Advanced Concepts: conditional types, mapped types, infer, decorators.
• Frameworks: React + TypeScript (or Angular/Nest.js for backend).
• Tools: tsconfig.json, ESLint with plugins, Prettier, Webpack/Vite.
• Testing: Jest, Vitest, type testing with tsd.

Code Example: Generics and Utility Types

// Function with a generic for safe API workasync function fetchData<T>(url: string): Promise<T> {  const response = await fetch(url);  if (!response.ok) throw new Error(`Error: ${response.status}`);  return response.json();}

// Using Partial for updating an objectinterface User {  id: number;  name: string;  email: string;}

function updateUser(id: number, updates: Partial<User>): void {  // Update logic  console.log(`Updating user ${id}:`, updates);}

// Example with Pick — selecting only the needed fieldstype UserPreview = Pick<User, 'id' | 'name'>;

2. Crafting a Resume That Recruiters Will Notice

A recruiter spends an average of 6-10 seconds reviewing a resume. Your task is to grab their attention immediately. Here is the structure of an ideal resume for a TS developer:

2.1. Header and Contacts

• Position: "TypeScript Developer" or "Frontend Developer (React + TypeScript)".
• Links: GitHub (mandatory!), LinkedIn, Habr Career.

2.2. Skills ("Hard Skills" Section)

Don't write "I know TypeScript at a Junior level". Better: "Typing REST APIs, working with Generic Constraints, configuring strict mode in tsconfig". Use keywords from job postings:

• TypeScript 5.x, Strict Mode, ES Modules
• React 18, Hooks, Redux Toolkit (typed)
• Node.js, Express, Prisma (with types)
• Jest, React Testing Library

2.3. Work Experience (even if not commercial)

Describe 2-3 pet projects with an emphasis on typing. Example:

Pet Project: "Todo App with TypeScript"
— Implemented a typed store using Redux Toolkit (slices with createSlice).
— Wrote 20+ unit tests in Jest for checking types and logic.
— Used never for handling impossible states (exhaustive check).

3. Interview Preparation: Theory and Practice

The interview for a TypeScript developer consists of three stages: screening (HR), technical interview (algorithms + TS), final (system design). Here is what you need to review:

3.1. Typical Technical Interview Questions

• Difference between interface and type. Answer: interfaces can be extended (extends), type cannot. But type supports union and intersection.
• What is unknown and how is it better than any. Unknown requires a check