Senior Full-Stack Developer - FinTech & Blockchain (Remote)

OpenKrill; United States; Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Flexible schedule

Remote work model

Medical insurance

Paid vacations

Paid Sick-leaves

Paid State holidays

Job summary

S-PRO is seeking a seasoned FullStack Developer to join our fintech-focused team in the United States. You will develop and maintain end-to-end features across backend (Node.js, NestJS) and frontend (React, MUI), build event-driven services with Kafka, and design data models for financial operations.

You will integrate with payment providers and blockchain infrastructure, contribute to AWS-based infrastructure, and participate in testing, code reviews, and production support.

Qualifications

• 5+ years of experience as a FullStack Developer.
• Experience with fin-tech projects or integrating with payment systems.
• Strong knowledge of Node.js, TypeScript, and NestJS.
• Strong knowledge of React, React Query, Valtio, MUI.
• Experience with PostgreSQL (TypeORM or other ORM solutions).
• Strong experience with message brokers (Kafka).
• Nice to have Docker, Kubernetes experience.
• Experience in the infrastructure (terraform, helm charts).
• Experience with observability/monitoring (datadog or similar).
• Hands‑on experience with AWS services (S3, SES, RDS).
• Knowledge of software development processes such as testing, code review, debugging, estimation, and production support.
• Ability to independently analyze requirements and implement solution.
• General understanding about blockchain (tokenization, smart contracts, how to handle blockchain transactions).
• Design patterns and algorithms knowledge.

Responsibilities

• Develop and maintain end-to-end features across the backend (Node.js, NestJS) and frontend (React, MUI).
• Build event-driven services with Kafka and design PostgreSQL data models for financial operations.
• Integrate with payment providers and blockchain infrastructure (tokenization, smart contracts, transactions).
• Contribute to infrastructure (AWS, Terraform, Helm, Kubernetes) and monitoring (Datadog).
• Analyze requirements, propose solutions, and provide estimates.
• Write tests, take part in code reviews, and support production.
• Collaborate with product, QA, and DevOps teams.

Skills

Node.js

TypeScript

NestJS

React

React Query

Valtio

MUI

PostgreSQL

Kafka

Blockchain basics

Design patterns

Testing

Code review

Production support

Programming fundamentals

Tools

Docker

Kubernetes

Terraform

Helm

Datadog

AWS

TypeORM

Job description

S-PRO is seeking a seasoned FullStack Developer to join our fintech-focused team in the United States. You will develop and maintain end-to-end features across backend (Node.js, NestJS) and frontend (React, MUI), build event-driven services with Kafka, and design data models for financial operations.

You will integrate with payment providers and blockchain infrastructure, contribute to AWS-based infrastructure, and participate in testing, code reviews, and production support.