Recommended expert
Yaroslav Stelmakh
Frontend Developer
Experience
Sep 2024 - Present
1 year 6 monthsFrontend Developer
NATS
- Sole front-end developer responsible for the entire ecosystem.
- Developed real-time dashboards, admin panels, and trading interfaces.
- Stack: TypeScript, React, Redux Toolkit, Redux-Saga, MUI, React Charts.
Feb 2022 - Aug 2024
2 years 7 monthsFrontend Developer
Kyrrex
- Developed administrative modules for a cryptocurrency platform.
- Created back-office tools using React, SWR, and Lerna.
- Contributed to exchange UI using Vue.js.
- Stack: React, TS, Vue.js, SWR, React-Query, Material-UI.
May 2021 - Feb 2022
10 monthsFrontend Developer
Poleaxe
- Built components with live WebSocket trading data.
- Developed wallet functionality using Redux and WebSocket.
Sep 2019 - May 2021
1 year 9 monthsFrontend Developer
Freelance / Commercial Projects
- Developed landing pages and full websites using React and Next.js.
- Integrated PayPal and LiqPay.
- Maintained WordPress, Tilda, OpenCart solutions.
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (4 years), Banking and Finance (3.5 years), and Aerospace and Defense (1.5 years).
Information Technology
Banking and Finance
Aerospace and Defense
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (6.5 years) and Product Development (5 years).
Information Technology
Product Development
Summary
Frontend Developer with 6+ years of experience building scalable, fast, and modern web applications. Expert in React, TypeScript, MUI, high-load dashboards, and real-time data systems. Strong clean-code mindset, excellent communication, and ownership of product quality.
Skills
- Javascript / Typescript
- React.js, Redux Toolkit, Redux-saga
- Vue.js, Swr, React-query
- Mui, Antdesign, Bootstrap
- Websocket, Rest, Graphql
- Performance Optimization
- Ui Architecture & Component Design
Languages
Russian
NativeUkrainian
NativeEnglish
AdvancedEducation
Sep 2019 - Jun 2021
T. Shevchenko National University of Kyiv
Master · Institute of High Technologies · Kyiv, Ukraine
Sep 2011 - May 2015
T. Shevchenko National University of Kyiv
Bachelor · Radiophysics Electronic and Computer Systems · Kyiv, Ukraine
Profile
Created
Last Update
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Frequently asked questions
Do you have questions? Here you can find further information.
Where is Yaroslav based?
Yaroslav is based in Kyiv, Ukraine.
What languages does Yaroslav speak?
Yaroslav speaks the following languages: Russian (Native), Ukrainian (Native), English (Advanced).
How many years of experience does Yaroslav have?
Yaroslav has at least 6 years of experience. During this time, Yaroslav has worked in at least 1 role and for 4 different companies. The average length of individual experience is 2 years and 7 months. Note that Yaroslav may not have shared all experience and actually has more experience.
What roles would Yaroslav be best suited for?
Based on recent experience, Yaroslav would be well-suited for roles such as: Frontend Developer.
What is Yaroslav's latest experience?
Yaroslav's most recent position is Frontend Developer at NATS.
What companies has Yaroslav worked for in recent years?
In recent years, Yaroslav has worked for NATS, Kyrrex, Poleaxe, and Freelance / Commercial Projects.
Which industries is Yaroslav most experienced in?
Yaroslav is most experienced in industries like Information Technology (IT), Banking and Finance, and Aerospace and Defense.
Which business areas is Yaroslav most experienced in?
Yaroslav is most experienced in business areas like Information Technology (IT) and Product Development.
Which industries has Yaroslav worked in recently?
Yaroslav has recently worked in industries like Information Technology (IT), Banking and Finance, and Aerospace and Defense.
Which business areas has Yaroslav worked in recently?
Yaroslav has recently worked in business areas like Information Technology (IT) and Product Development.
What is Yaroslav's education?
Yaroslav holds a Master in Institute of High Technologies from T. Shevchenko National University of Kyiv and a Bachelor in Radiophysics Electronic and Computer Systems from T. Shevchenko National University of Kyiv.
What is the availability of Yaroslav?
Yaroslav is immediately available full-time for suitable projects.
What is the rate of Yaroslav?
Yaroslav's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.
How to hire Yaroslav?
To hire Yaroslav, click the Meet button on the profile to request a meeting and discuss your project needs.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
600
450
300
150
Market avg: 250-410 €
Market avg: 250-410 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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