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
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Welltech

Welltech

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Welltech is a healthcare technology company that develops digital health solutions and platforms designed to improve patient outcomes and streamline healthcare delivery. The company creates software and services that enable healthcare providers, patients, and health systems to better manage care, access medical information, and enhance the overall healthcare experience. Operating in the digital health and health tech market, Welltech serves healthcare organizations seeking to modernize their operations and improve patient engagement through technology-driven solutions.

welltech.com

Tech Stack

Languages
TypeScript
Frameworks
React NativeReact
Databases
Not Specified
Tools
CI/CD PipelinesAI Development Tools
Other
BFF ServicesHLS Streaming
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