Senior Fullstack Engineer (.NET, React) Warsaw

Vention; Warszawa; Hybrid; PLN 102,000 - 122,000; Full time

Benefits offered by this job

EDU corporate community (300+ members)

Licenses for AI tools

Private medical care with LuxMed

Kafeteria MyBenefit credits

Multisport membership

Glasses reimbursement

Referral bonuses

Job summary

Vention in Warsaw, Poland, is seeking a proactive .NET developer to architect and deliver production-grade solutions, focusing on performance and scalability, with a strong emphasis on full-cycle development from requirements to deployment. You will engage stakeholders through agile ceremonies and demos, participate in pre-sales activities, and mentor teammates as optional leadership.

The role requires 4+ years of .NET experience, REST APIs, React/TypeScript, AWS, and English communication, with

Qualifications

• 4+ years of professional software development experience with .NET.
• Experience building REST APIs with API versioning and React/TypeScript.
• Strong English (B2+) with ability to communicate with English-speaking customers.

Responsibilities

• Architect and deliver production-grade .NET solutions with a focus on performance and scalability.
• Lead full-cycle development from requirements analysis through deployment and optimization.
• Engage stakeholders through demo sessions, Agile ceremonies, and technical workshops.
• Champion code quality through rigorous reviews and robust test automation strategies.
• Contribute to business growth by participating in technical estimations, planning, and pre-sales activities.
• Optional leadership: Conduct technical interviews, mentor team members, and share expertise at industry events.

Skills

.NET development

REST APIs with versioning

React & TypeScript

Relational databases

AWS

ERP systems experience

English proficiency (B2+)

Job description

Salary: from 10 000 PLN gross Hybrid Full-time Warsaw, Poland (67 Prosta St, 00-838)

Vention is a global engineering partner to tech leaders and fast-growing startups, combining 20+ years of product development expertise with an AI-first approach and a reputation for reliable delivery.

We’ve been building robust .NET solutions since 2002 — from microservice-based systems to high-load, enterprise-grade platforms. Our teams follow best engineering practices like clean architecture, DDD, automated testing, and CI/CD, delivering cloud-native solutions on Azure and AWS.

What you'll do

• Architect and deliver production-grade .NET solutions with a focus on performance and scalability
• Lead full-cycle development from requirements analysis through deployment and optimization
• Engage stakeholders through demo sessions, Agile ceremonies, and technical workshops
• Champion code quality through rigorous reviews and robust test automation strategies
• Contribute to business growth by participating in technical estimations, planning, and pre-sales activities
• Optional leadership: Conduct technical interviews, mentor team members, and share expertise at industry events

What you bring

• 4+ years of professional software development experience with .NET
• Strong experience building REST APIs, including API versioning
• Strong experience with React and TypeScript
• Solid understanding of relational databases
• Hands‑on experience with AWS
• Experience with the implementation of ERP systems and knowledge in accounting calculations would be a plus
• B2 level of English or higher, with experience communicating with English‑speaking customers
• Genuine interest in continuously improving skills and keeping up with new technologies

What you'll get

• EDU corporate community (300+ members): tech communities, interest clubs, events, a small R&D lab, a knowledge base, and a dedicated AI track
• Licenses for AI tools: GitHub Copilot, Cursor, and others
• Private medical care with LuxMed
• Kafeteria MyBenefit credits for stores, restaurants, and cafés
• Access to a Multisport membership to stay active
• Glasses reimbursement program
• Referral bonuses for bringing in new talent