Senior Full-stack developer / Tech Lead

About Fulcrum: We’re a team of tech-savvy, creative & passionate IT professionals. We’ve created a vibrant and performance-driven culture for ourselves where everyone is free to think & act outside the box. There are literally no limits to what you can do here, as long as we WOW our clients and OVER deliver what we promise.

We are now looking for Tech Lead / Senior Full-stack developer to join one of our projects - it is a mobile and web platform for healthcare professionals and medical device manufacturers. For practitioners, it provides fast access to device information through features like voice AI, barcode scanning, and an interactive device catalog. For manufacturers, it offers a web portal to manage device catalogs, contacts, territories, CRM functions, and training materials for physicians.

We’re looking for a professional who can both lead by doing and think strategically — someone who combines hands-on development with the ability to evaluate the project’s current state, identify bottlenecks, and propose impactful solutions.

Team composition - Product owner, 2 Fullstack devs, 2 mobile devs, 2 QAs, 1 content manager

Main responsibilities:

• Lead the technical direction of the project and participate in strategic architecture planning.

• Make key technical decisions for both backend (Nest.js) and frontend (Next.js).

• Ensure alignment and smooth collaboration between web and mobile teams (Android/iOS).

• Own code quality, perform code reviews, manage CI/CD pipelines, and address technical debt.

• Design and implement architectural patterns, optimizing for performance and security.

• Work with AWS services (deployment, S3, Lambda, RDS, CloudFront, etc.).

• Integrate and maintain Auth0 for authentication and access management.

• Advise the team on best practices for mobile client development (via API, WebSocket, WebRTC).

• Ensure system reliability and scalability, taking into account the specifics of the healthcare domain (compliance, data security, audit trails).

Requirements

• 5+ years of experience in web development, including at least 2 years as a Tech Lead or Senior Developer.

• Nest.js – deep understanding of architecture, dependency injection (DI), modularity, guards, and interceptors.

• Next.js – experience with SSR, SSG, routing, and performance optimization.

• Hands-on experience with PostgreSQL, TypeORM, and REST.

• Proven experience working with AWS (EC2, S3, Lambda, RDS, CloudWatch, CloudFront).

• Solid understanding of mobile architecture principles – how the backend supports Android/iOS clients.

• Experience in the healthcare domain or other high-security industries is a strong advantage.

• Experience working with payment systems.

• Ability to write clean, structured, and scalable code.

Nice-to-have skills

• Experience with LLM Agentic Pipelines (e.g., Legchain, LangGraph, etc.).

• Practical experience with CI/CD (GitHub Actions, AWS CodePipeline, or similar tools).

• Hands-on experience with WebRTC, WebSocket, or real-time messaging.

• Knowledge of Auth0 or other identity providers (OAuth2, OpenID Connect).

• Understanding of DevOps practices, monitoring, and logging (Grafana, ELK, Sentry).

• Knowledge of development principles in regulated environments (HIPAA, GDPR).

What we offer:

- Flexible schedule & opportunity to work remotely or workspace in Kyiv (