Position: Front-End Team Lead (Poland)
Company: Seeking Alpha
Category: JavaScript
Experience required: 5y
English level: fluent

Why we’re a great company to work for?

We have a mission. Seeking Alpha is about more than helping people make money. People who invest are 24% happier, 19% less stressed, and report a 36% increase in their sense of well-being (source). By helping investors to succeed, we help them to send children to college, achieve life goals, afford healthcare, and provide themselves with a secure retirement.
- We’re profitable and growing fast. We fuel our growth investments with our own capital, leading to greater stability for employees, and an inspiring growth-focused environment. All employees receive equity grants in-line with their cash compensation.
- You’ll work with great people. We work in small, tight-knit groups of smart, engaged people who bring everything to the table every day.
- We have fun. We love to get together at company events, which include Alphas who work from home. “Seeking Alpha doesn’t feed me well,” said no one ever.
- You’ll impact the lives of many people. We have 15 million unique monthly visitors, and 500,000 unique users visit Seeking Alpha every business day.

If that’s what you’re looking for too- go ahead and apply!

Responsibilities:
- Lead and mentor a team of talented engineers in a zero-downtime environment where code is deployed multiple times a day.
- Own and lead new feature development, testing, and bug management.
- Collaborate with project managers, participate in design and planning discussions, contribute architecture ideas.
- Develop and test new user-facing features.
- Write highly scalable, reusable, and testable code.

MUST:
- 5+ years of experience with Javascript
- 3+ years of front-end development experience in building large, complex, highly scalable React-based single-page web applications.
- Knowledge of Agile principles, open-source ecosystem.
- Advanced English reading/writing/speaking
- Experience in OOP and MVC design and development patterns. Good understanding of data structures and design patterns.
- Comfortable with source version control software and package managers (Git, NPM).
- Knowledge and understanding of client-side architecture best practices.
- Competent JavaScript programmer who doesn’t need to rely on libraries to accomplish innovative interactions.
- Experience with CSS3 and Less/Sass (ability to write mixings, partials, use source maps, etc). Deep understanding of Mobile-first Responsive design. Experience with Twitter Bootstrap or Foundation Framework.
- Understanding of the interplay between JavaScript and HTML & CSS, with a focus on performance. Strong proficiency in JavaScript / ES6, including DOM manipulation and the JavaScript object model. Good understanding of browser rendering behavior. Familiarity with newer specifications of EcmaScript.
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Expert-level hands-on experience and understanding of React.js and its core principles. Proficiency in building reusable components and modules. Experience with popular React.js workflows (such as Flux or Redux, CSS-in-JS).
- Understanding of all major browsers and the special considerations required for all various quirks. Knowledge of browser internals like Javascript engines, native DOM, Event APIs, and ways to tune code for the best performance.
- Deep understanding of the HTTP protocol, browser networking.

BONUS POINTS FOR:
- Experience working in a UNIX environment.
- You’ve built and delivered an app on Amazon AWS, Microsoft Azure, or Google Cloud Platform.
- Experience with PWAs, Service Workers, and client-side caching.
- Experience in web standards, semantic web, accessibility, and SEO and the interplay between them.
- Having a Github portfolio or link to open source work.