Senior .NET/React Full-Stack Engineer — FinTech (Hybrid)

Visa Hunt; Poland; Hybrid; PLN 201,000 - 279,000; Full time

Benefits offered by this job

Hybrid/Remote policy

Modern Warsaw Office

Global scale

Job summary

Optiveum, a boutique talent advisory, seeks a Senior FullStack .NET Developer for a fast-growing US-based FinTech client with a Warsaw hub. You’ll bridge robust backend services and modern UIs, tackling complex distributed systems and delivering world-class UX.

Ideal candidates have 5+ years in .NET and React, strong Azure DevOps/GitHub Actions experience, and excellent English. Hybrid/remote policy with global collaboration and growth opportunities.

Qualifications

• 5+ years as Full-Stack Engineer with .NET and React experience.
• Proficient in building RESTful APIs and distributed systems.
• Strong Azure Cloud and DevOps capabilities.
• Excellent English communication for US collaboration.

Responsibilities

• Own features end-to-end from DB to UI in a fast-moving team.
• Contribute to cloud-native microservices on Azure for global traffic.
• Maintain SOLID, Clean Code and design patterns with velocity.
• Lead frontend development using React and TypeScript.
• Collaborate with US Product Managers and stakeholders.
• Mentor Warsaw team through code reviews and knowledge sharing.

Skills

NET/.NET 6/8

C#

RESTful APIs

Event-driven

React

TypeScript

State management

Azure

SQL Server

Entity Framework Core

Docker

Kubernetes

CI/CD

Azure DevOps

GitHub Actions

English (C1)

Tools

Redux

Zustand

React Query

Job description

Optiveum, a boutique talent advisory, seeks a Senior FullStack .NET Developer for a fast-growing US-based FinTech client with a Warsaw hub. You’ll bridge robust backend services and modern UIs, tackling complex distributed systems and delivering world-class UX.

Ideal candidates have 5+ years in .NET and React, strong Azure DevOps/GitHub Actions experience, and excellent English. Hybrid/remote policy with global collaboration and growth opportunities.