Senior React-focused FullStack Developer for US AdTech SaaS

Poland, Ukraine & EU
5000-9000 USD/month
  • B2B
  • ,
  • Permanent

Itentio IT Recruitment

Our client is a US-based (San Carlos, California) product software company. They are developing a SaaS AdTech platform. The company is actively growing and expanding its software development team and therefore is looking for Senior React-Focused FullStack Developer to join the company. You may find the full description below.

Whom are we looking for – Senior React-focused FullStack Developer

Location: Poland, EU or Ukraine (100% remotely).

Brief project description

The company gives Fortune 500 companies control over the digital advertisement experience via a sophisticated and unified platform. They simplify ad experience management by integrating with existing tech and media stacks to manage ad experiences across all channels centrally. The platform was purpose-built to power all ad creative use cases, including DCO, personalization, audience management, creative performance visualization, experimentation, workflow, and self-optimizing performance competitions. It is a high-load project with millions of tractions per day. The company is expanding its international team and looking for a Senior React-focused FullStack Developer to join its team in Poland or Ukraine.

Why is it worth joining this company?

  1. It is a company with a startup set up and has a bit over 50 people on board, so each person matters a lot and can involve in the direction of product development;
  2. They are working with their product development, which is pretty flexible and, at the same time, challenging;
  3. The company provides professional growth and career advancement opportunities, with annual salary reviews, as well as knowledge sharing within the team of skilled colleagues.

Senior React-focused FullStack Developer – Main responsibilities for this position

  • Working with High Load distributed systems with strict RPC/Latency requirements;
  • Big Data, Stream + Batch data processing;
  • Data analysis by business use cases.

Senior React-focused FullStack Developer – Main requirements 

  • At least 7 years of relevant commercial experience;
  • Deep knowledge of JavaScript, understanding of ES2017 (ES8);
  • Experience with React and TypeScript is a must (we are trying to use React 18 in the latest
    projects but many projects are still using React 16);
  • Experience with NodeJS/Express is a must (we are using NodeJS 18 in the latest projects and
    switching old ones to it);
  • Solid experience with CSS3 (flexbox, grid layout, markup skills);
  • Confident Linux/Mac OS X user;
  • Good communicative English skills (at least upper intermediate, B2) and either Ukrainian or russian languages;

Nice to have:

  • Understanding of MobX state-management pattern;
  • Experience with at least one programming language that is not JavaScript (including transpiled ones);
  • Kubernetes, GitLab CI;
  • Team lead experience/skills is a huge plus.

Senior React-focused FullStack Developer – What is in it for you?

  • Excellent salary remuneration: the company can offer between 5000 USD and 9000 USD net on a B2B contract based on your skills, with the opportunity to fix this amount in USD;
  • 24 days of vacations on a B2B basis contract, Polish official holidays are days off;
  • 5 days of paid sick leaves on a B2B contract;
  • The company can help you with relocation to either Canada or Cyprus based on your current status/residence;
  • The company can organize trips and events, for instance, Annual Team Summit;
  • Certifications and training within the company;
  • Flexible working hours and opportunity to work remotely 100%.

The Next Step for you:

Is it a new challenge for you? If you want to become a valuable part of this project, please forward your CV to Itentio IT Recruitment at or apply via the contact form below.

Itentio IT Recruitment privacy and equal opportunity statements:

By submitting the recruitment application, you consent to the processing of your personal data contained therein. The controller of your personal data is Vladyslav Muzhylivskyi operating under the business name Vladyslav Muzhylivskyi Itentio with its registered office in Kraków (Tax ID: 6751522794). Personal data will be processed in order to carry out the recruitment process for the position specified in the job offer, including for the purpose of assessing the qualifications for work in this position. You can withdraw your consent at any time, which, however, does not affect the legality of the processing that was carried out on its basis before its withdrawal. You have the right to request access to your data, to rectify it, delete it or limit its processing, as well as the right to transfer your personal data, the right to object to data processing and the right to lodge a complaint with the supervisory authority for the protection of personal data. Additional information on the processing of personal data is in our Privacy Policy available at

Please note that all applications are treated with strict confidence. Itentio IT Recruitment will never share your data outside our organization without your written consent. Itentio is an equal-opportunity recruitment company and values diversity at our company. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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Stages of the recruitment process

01 step

Intro call with Itentio recruiters

An online interview on phone/online with our recruiter to discuss this position and talk about your experience (30 minutes)

02 step

Technical interview with software team

An interview with the technical team (1 hour)

03 step

Technical interview with another software team

An interview with another team for examining the best team to fit (1 hour)

04 step

Management interview

Conversation with CTO and Director of Engineering (1-1,5 hours max)

05 step

Offer letter

The company will send you offer letter. Congratulations and welcome on board!

Are you a talented IT professional looking for exciting career opportunities?

Take the first step towards your dream job by contacting Itentio IT Recruitment today!

Fill out this contact form and upload your CV to get started. Our team will review your information and get in touch with you.

We can't wait to hear from you and help you advance your IT career!

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