Senior Fullstack Engineer – Cross-platform

🕒 June 15

🇧🇬 Bulgaria – Remote

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 37%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Welltech

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2017

🏥 Healthcare

💼 Consulting

📣 Marketing

💰 Series A on 2017-12

Healthcare • Consulting • Marketing

Welltech is a data-driven company specializing in health and wellness applications. With over 200 million installs, Welltech focuses on developing products geared towards fitness, weight loss, and healthy living, such as the popular apps Muscle Booster and Yoga-Go. The company's offerings are designed to improve the health of millions of people globally and include fitness guides, diet plans, and yoga routines. Welltech emphasizes constant growth and learning, supported by a team of over 700 professionals who work to create reliable, expert-endorsed content. Their products aim to offer comprehensive solutions for fitness and weight management, with a solid foundation in data and analytics.

📋 Description

• Build and evolve a cross-platform ecosystem covering mobile, web, BFF, and infrastructure layers using an AI-first, agentic development approach • Design scalable foundations for health & fitness applications powered by React Native and modern web technologies • Work directly with product, design, and marketing stakeholders to rapidly translate business needs into scalable technical solutions and experiments • Develop and continuously improve AI-agentic workflows across the full development lifecycle to increase team productivity, code quality, and delivery speed • Develop shared platform capabilities, internal tooling, CI/CD pipelines, and AI-assisted workflows that improve development speed and product quality • Work on native mobile integrations and advanced media experiences, including video playback, streaming, and HLS-based solutions • Contribute to modular architectures, reusable systems, backend-driven UI solutions, and white-label application capabilities • Build reliable and scalable integrations between frontend clients, BFF services, and platform infrastructure • Participate in architecture discussions, code reviews, documentation, and continuous improvement of engineering workflows

🎯 Requirements

• Strong commercial experience with React Native and modern TypeScript-based application development • Solid understanding of full-stack architecture including mobile, web, BFF, and cloud/infrastructure layers • Experience building scalable cross-platform systems and shared application foundations • Deep understanding of software architecture, modular systems, scalability, and performance optimization • Experience working with CI/CD pipelines, automation tooling, and modern developer workflows • Strong engineering mindset focused on maintainability, reliability, testability, and fast iteration • Comfortable working in AI-assisted or agentic development environments and adopting new AI-driven workflows quickly • Experience with backend-driven UI architectures

🏖️ Benefits

• Health insurance • Remote work options

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