Sr. Fullstack Engineer

The Briminc; Poland; Remote; PLN 180,000 - 260,000; Full time

Job summary

The BrimincSoftech is seeking a Senior Full-Stack / Platform Engineer to architect scalable healthcare workflows and AI-assisted systems. You will design resilient, real-time backend systems and own deployment, security, and performance optimization.

Requirements include 3+ years in full-stack/platform engineering, strong TypeScript, React/Next.js, Node.js/Fastify, PostgreSQL, and real-time systems experience. You will mentor engineers and drive architectural decisions.

Qualifications

• 3+ years of full-stack or platform engineering experience.
• Strong expertise in TypeScript and modern frontend/backend stacks.
• Experience with React/Next.js, Node.js/Fastify, and PostgreSQL.
• Experience with real-time systems (WebSockets, MQTT, Redis Pub/Sub).
• Solid Linux deployment knowledge (PM2, process management).
• Experience implementing secure auth flows (OAuth2, Keycloak, RBAC).
• Ability to explain architectural decisions and trade-offs clearly.

Responsibilities

• Architect scalable healthcare workflows and AI-assisted systems.
• Design resilient, real-time, event-driven backend systems.
• Lead technical decision-making and mentor junior engineers.
• Own deployment, security, and performance optimization.
• Contribute to long-term platform architecture.

Skills

TypeScript

React

Next.js

Node.js

Fastify

WebSockets

MQTT

RBAC

OAuth2

Keycloak

Security design

Tools

PM2

PostgreSQL

Redis

Job description

At The BrimincSoftech, we are a dynamic recruitment and talent solutions firmcommitted to connecting businesses with exceptional talent.Specializing in staff augmentation, permanent hiring, andcustomized workforce solutions, we partner with organizations topower their growth through people.

Job Description

This is a remote position.

Role: Senior Full-Stack / Platform Engineer Experience: 3+ years What You’ll Do Architect scalable healthcare workflows and AI-assisted systems Design resilient, real-time, event-driven backend systems Lead technical decision-making and mentor junior engineers. Own deployment, security, and performance optimization Contribute to long-term platform architecture

Required Skills 3+ years of full-stack or platform engineering experience Deep expertise in TypeScript (mandatory) Strong hands-on experience with: React / Next.js Node.js / Fastify PostgreSQL (schema design, indexing, performance tuning) Experience with real-time systems (WebSockets, MQTT, Redis Pub/Sub) Strong Linux deployment knowledge (PM2, process management) Experience implementing secure auth flows (OAuth2, Keycloak, RBAC) Ability to explain architectural decisions and trade-offs clearly.

Strongly Preferred Experience with FHIR R4 / HL7 Experience using production grade RAG or agentic frameworks LLMs ( LangChain.js OpenAI-compatible APIs) Experience designing event-driven or distributed systems Security & compliance awareness (HIPAA / EMR / ABDM concepts)

Bonus IoMT or medical device protocol experience Observability stack experience (Grafana, VictoriaMetrics) Dabbling with LLMs and other ML models Prior healthcare startup experience