FullStack .NET + React Developer

Madiff • Polish: C1 • English: B2 (Optional) • Information Technology • Property Development • SQL • C# • 2 days ago
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Salary
≈ $56k – $90k per year (Estimated)
Location
Remote (Poland)
Seniority
Senior · 5+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 11, 2026. First seen by Alion on Oct 10, 2026.

Overview
Company
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Profile match

Madiff

Madiff is an IT consulting and staff augmentation company that provides remote agile teams, nearshore development teams and individual IT contractors to enterprise clients, with most of its hiring run from Warsaw. It works across retail, banking and insurance, telecom and media, automotive, energy, transportation and life sciences, recruits consultants in Poland and Portugal and sells its services into the UK, Ireland, France, Switzerland, Northern Europe and the US. Its openings cover .NET and full stack developers, data engineers and data scientists, AI architects, system and business analysts, QA testers, project managers and IT sales staff.
madiff.eu • HQ: Warsaw, Poland • IT Outsourcing & Dedicated Teams • IT Staffing & Staff Augmentation • IT Consulting & Digital Transformation • 51-200 employees

We’re looking for an experienced FullStack .NET Developer to join a greenfield digital transformation project in the corporate banking sector.

You’ll help build a modern, high-performance system from scratch using .NET 6/8, React, Kafka, and microservices integrated with multiple enterprise platforms - a project that will have a long-term impact on thousands of users.

Responsibilities:

  • Build scalable backend features in .NET 6/8 and contribute to a microservices-based architecture

  • Develop clean, reusable components in React integrated with REST APIs

  • Implement and integrate REST/SOAP services and event-driven systems with Kafka

  • Work closely with analysts, architects, and business stakeholders on requirements and design

  • Participate in testing, deployment, and optimisation to ensure high system performance

    • Requirements

  • 5+ years of experience in .NET development

  • Strong skills in .NET 6/8, REST, SOAP, SQL Server, Entity Framework

  • Hands-on experience with React

  • Familiarity with Kafka and distributed/microservices architecture

  • Understanding of enterprise system integration and APIs

  • Fluency in Polish and English (B2 level or higher) Nice to have:

  • Experience in banking or financial systems

  • Knowledge of secure systems or mobile banking

  • Familiarity with DDD, event storming, or user story mapping

  • Experience working in Agile/SCRUM environments

    • Benefits

  • Competitive salary

  • Fully remote or hybrid model

  • Long-term B2B contract with a stable project pipeline

  • Comprehensive healthcare

  • Work in a multilingual, multinational, and multicultural environment on international projects

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