Senior Full-Stack Developer (React Native/Node.js/TypeScript)

Yalantis Limited; Warszawa; On-site; PLN 240,000 - 360,000; Full time

Benefits offered by this job

Medical insurance

Paid vacation

Sick leave

Mental health support

English lessons

Professional certifications reimb.

Corporate library

Tech community events

Flexible work format

Yalantis store access

Job summary

Yalantis Limited is seeking a Senior Full-Stack Developer to join an international product team. The role focuses on backend development with Node.js (≈70%) and contributes to a cross-platform mobile app built with React Native (≈30%).

You will work closely with clients and internal teams, helping deliver scalable solutions and shaping technical direction. The ideal candidate has 5+ years of commercial software development experience, strong Node.js and React Native skills, and a proactive,

Qualifications

• 5+ years of commercial software development experience.
• Strong commercial experience with Node.js.
• Commercial experience with React Native.
• Experience designing and developing RESTful APIs.
• Strong understanding of backend architecture and best practices.
• Understanding of mobile application architecture and React Native best practices.
• Experience integrating third-party APIs and services.
• Hands-on experience with Git and version control workflows.
• Strong communication skills and ability to work directly with clients.
• Proactive, self-driven, and comfortable taking ownership in a fast-paced environment.
• English level: Upper-Intermediate or higher.
• Professional growth: Individual development plan, mentorship, reimbursement for professional certifications and English lessons, access to professional courses in Corporate Learning Management System.
• Community: Tech community and knowledge-sharing events, English speaking club, corporate library and book club, volunteering and charity initiatives.
• Wellbeing: Medical insurance, regular medical check-ups, sport reimbursement, paid vacation and sick leave, mental health support and events.
• Work environment: Fully-equipped offices, top-notch equipment, flexible work format, activities both in-office and online, Y-bucks and access to the Yalantis store.

Responsibilities

• Develop and maintain backend services using Node.js (approximately70% of the role).
• Design, build, and maintain scalable REST APIs and backend integrations.
• Contribute to the development and maintenance of across-platform mobile application using React Native (approximately30% of the role).
• Integrate third-party APIs and services.
• Collaborate closely with the client and internal team on a daily basis.
• Participate in product discussions and help shape technical solutions.
• Take ownership of features from development to deployment.
• Write clean, maintainable, and testable code.
• Actively use AI tools to improve development efficiency and code quality.
• Adapt to changing requirements in a dynamic environment.

Skills

Node.js

React Native

RESTful APIs

Backend architecture

Git

Client communication

English (Upper-Intermediate)

Ownership

Tools

Git

Job description

Yalantis is a software engineering and IT consulting company in the outsourcing market. Our team has more than 500 specialists and continues to grow. Join and cooperate with us in Dnipro, Kyiv, Larnaca (Cyprus), Warsaw (Poland) and remotely from any city of Ukraine.

Weare looking for aSenior Full-Stack Developer tojoin aninternational product team. This role isprimarily focused onbackend development with Node.js (approximately70% ofthe workload), while also contributing toacross-platform mobile application built with React Native (around 30%). You will work closely with the client, participate inproduct discussions, and help deliver scalable and user-friendly solutions.

Responsibilities

• Develop and maintain backend services using Node.js (approximately70% ofthe role).
• Design, build, and maintain scalable REST APIs and backend integrations.
• Contribute tothe development and maintenance ofacross-platform mobile application using React Native (approximately30% ofthe role).
• Integrate third-party APIs and services.
• Collaborate closely with the client and internal team onadaily basis.
• Participate inproduct discussions and help shape technical solutions.
• Take ownership offeatures from development todeployment.
• Write clean, maintainable, and testable code.
• Actively useAI tools toimprove development efficiency and code quality.
• Adapt tochanging requirements inadynamic environment.

Requirements

• 5+years ofcommercial software development experience.
• Strong commercial experience with Node.js.
• Commercial experience with React Native.
• Experience designing and developing RESTful APIs.
• Strong understanding ofbackend architecture and best practices.
• Understanding ofmobile application architecture and React Native best practices.
• Experience integrating third-party APIs and services.
• Hands-on experience with Git and version control workflows.
• Strong communication skills and ability towork directly with clients.
• Proactive, self-driven, and comfortable taking ownership inafast-paced environment.
• English level: Upper-Intermediate orhigher.
• Professional growth: Individual development plan, mentorship, reimbursement for professional certifications and English lessons, access toprofessional courses inCorporate Learning Management System.
• Community: Tech community and knowledge-sharing events, English speaking club, corporate library and book club, volunteering and charity initiatives.
• Wellbeing: Medical insurance, regular medical check-ups, sport reimbursement, paid vacation and sick leave, mental health support and events.
• Work environment: Fully-equipped offices, top-notch equipment, flexible work format, activities both in-office and online, Y-bucks and access tothe Yalantis store.