Welltech

Senior Fullstack Engineer, Cross-platform

Welltech2 weeks ago
Location

Bulgaria

Workplace

Remote

Type

Full Time

Salary

BGN 80,000 – 130,000

Level

Senior

Role

Full Stack Engineer

Posted

Jun 15, 2026

Full TimeRemoteSenior

The role

Summary

Welltech is seeking a Senior Fullstack Engineer to drive cross-platform development for their wellness technology ecosystem, focusing on building scalable, AI-augmented mobile and web applications across health and fitness platforms. The ideal candidate will own end-to-end product engineering, from architecture to deployment, with a strong emphasis on innovative, outcome-driven development approaches.

What you'll do

Cross-Platform Development: Build and evolve a comprehensive cross-platform ecosystem covering mobile, web, backend-for-frontend (BFF), and infrastructure layers using an AI-first development approach
Architecture and Scalability: Design scalable foundations for health and fitness applications, focusing on modular, reusable systems with backend-driven UI and white-label capabilities
Stakeholder Collaboration: Work directly with product, design, marketing, and data teams to translate business requirements into rapid experiments and technical solutions
AI-Driven Workflows: Develop and continuously improve AI-assisted workflows across the software development lifecycle to enhance team productivity, code quality, and delivery speed
Platform Engineering: Create shared platform capabilities, internal tooling, CI/CD pipelines, and workflows that improve overall engineering efficiency

What we look for

Technical

Cross-Platform TechnologiesProven experience with React Native and modern TypeScript-based application development
Full-Stack ArchitectureDeep understanding of mobile, web, BFF, and cloud/infrastructure architectural layers
AI DevelopmentComfort and proficiency in AI-assisted development environments and workflows

Education

Computer ScienceBachelor's degree in Computer Science, Software Engineering, or equivalent professional experience

Experience

System DesignDemonstrated ability to build scalable cross-platform systems and shared application foundations
DevOps PracticesExperience with CI/CD pipelines, automation tooling, and modern developer workflows

Skills

Required skills

React NativeStrong commercial experience developing cross-platform mobile applications
TypeScriptProficient in modern TypeScript-based application development
Software ArchitectureAdvanced understanding of modular systems, scalability, and performance optimization

Nice to have

Backend DevelopmentHands-on Node.js and TypeScript backend development experience
Mobile SecurityFamiliarity with OWASP mobile security best practices
Video TechnologiesExperience with native video player integrations and HLS streaming

Compensation & benefits

Salary

BGN 80,000 – 130,000 (annual)

Benefits

Remote Work

Fully remote work arrangement with flexible location options

Innovative Environment

Opportunity to work with cutting-edge AI and cross-platform technologies


Interview process

  1. 1
    Recruiter Call Initial screening and introduction to the role and company
  2. 2
    Hiring Manager Interview Detailed discussion about technical background and role fit
  3. 3
    Skills Assessment Technical evaluation of candidate's capabilities and expertise
  4. 4
    Live Coding Practical coding assessment to demonstrate technical skills

Apply for this position

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