Senior Backend Architect - Blockchain Infrastructure

Colossus; Roma; On-site; EUR 70,000 - 95,000; Full time

Job summary

Colossus Digital in Rome is seeking a middle/senior Backend Developer to lead and scale our blockchain infrastructure. You will own architecture across microservices and AKS, drive performance, and apply security best practices while collaborating with product and security teams.

Key focus areas include Node.js (NestJS preferred), microservices in cloud environments (GCP/AWS), Docker/Kubernetes, and data stores like MongoDB.

Qualifications

• Strong experience with Node.js (NestJS preferred).
• Expertise in microservices, cloud platforms (GCP/AWS), and Docker/Kubernetes.
• Solid knowledge of MongoDB, API design, and backend security (OAuth2, JWT).
• Leadership in architecture and mentoring.
• Testing Frameworks (such as Jest)
• Secure, scalable microservices architecture
• Engage with the future of finance

Responsibilities

• Lead and scale backend systems across microservices.
• Own architecture, drive performance and security across AKS infrastructure.
• Mentor team and drive architectural decisions.
• Design robust APIs and ensure secure integration with blockchain components.

Skills

Node.js

NestJS

Microservices

Cloud platforms

GCP

AWS

Docker

Kubernetes

MongoDB

API design

OAuth2

JWT

Leadership

Mentoring

Jest

Security

Job description

Colossus Digital in Rome is seeking a middle/senior Backend Developer to lead and scale our blockchain infrastructure. You will own architecture across microservices and AKS, drive performance, and apply security best practices while collaborating with product and security teams.

Key focus areas include Node.js (NestJS preferred), microservices in cloud environments (GCP/AWS), Docker/Kubernetes, and data stores like MongoDB.