Senior .Net Developer for Payments Team

GR8_TECH; Spain; Remote; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Remote-first

Learning culture

Team events

Languages

Job summary

GR8_TECH is looking for a senior .NET engineer to design, develop, and maintain scalable systems for the Payments Team. You will mentor engineers, drive architectural choices, and ensure high performance aligned with business goals.

You’ll design microservices, implement resilient architectures, and contribute to continuous improvement in development practices while collaborating with product and operations teams to deliver production-ready solutions.

Qualifications

• Strong experience designing scalable .NET systems with microservices and cloud-native patterns.
• Advanced C# skills and RESTful API development, including asynchronous programming.
• Proficiency in SQL optimization, data modeling and indexing across relational/NoSQL databases.
• Hands-on experience with Kafka, high-load system tuning, caching, and distributed computing.

Responsibilities

• Design and implement scalable, resilient software architectures using microservices and event-driven approaches.
• Write, test, and review production-ready code; ensure security and best practices.
• Mentor junior engineers and collaborate with product, design and operations teams.
• Drive continuous improvement in development practices and performance.
• Create and maintain technical documentation; communicate updates to stakeholders.

Skills

NET architecture

C# programming

RESTful API development

SQL optimization

Kafka

CI/CD pipelines

Docker/Kubernetes

Testing (xUnit, NUnit)

Agile teams

English (Upper-Intermediate+)

Tools

Docker

Kubernetes

SQL databases

NoSQL databases

Job description

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.

Why This Role Exists

This role exists to design, develop, and maintain scalable .NET systems for the Payments Team. It ensures high performance, resilience, and alignment with business objectives while mentoring engineers and improving development practices.

What You’ll Drive

System design and architecture

• Designing and implementing scalable, resilient, and efficient software architectures using microservices, event-driven, and cloud-native approaches.

Development and code quality

• Writing, testing, and debugging complex code for new and existing applications.
• Conducting code reviews to ensure quality, security, and adherence to best practices.
• Delivering production-ready code in a timely manner.

Mentorship and collaboration

• Providing guidance and mentoring junior engineers and team members.
• Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals.

Continuous improvement and research

• Researching and implementing new technologies and methodologies to improve software performance and processes.
• Identifying and resolving complex software issues and technical challenges.
• Driving continuous improvement in development practices.

Communication and documentation

• Creating and maintaining comprehensive technical documentation.
• Communicating effectively with stakeholders, presenting technical concepts and project updates.

What Makes You a GR8 Fit

Must-have

• Strong experience in designing scalable and resilient .NET systems (microservices, event-driven, cloud-native).
• Advanced C# skills, RESTful API development, asynchronous programming, and mastery of design/resilience patterns (DDD, CQRS, circuit breaker, etc.).
• Proficiency in SQL optimization, data modeling, indexing, and experience with relational and NoSQL databases.
• Hands-on experience with Kafka, high-load system optimization, caching, and distributed computing.
• Solid experience with CI/CD pipelines, Docker/Kubernetes, and infrastructure automation.
• Strong focus on testing (xUnit, NUnit), monitoring (Serilog, App Insights), and secure coding practices.
• Proven experience mentoring peers and driving technical decisions in Agile teams.
• Upper-Intermediate+ English, B2+ Ukrainian/Russian.

Nice-to-have

• Experience leading or managing software development projects.
• Familiarity with cloud platforms (Azure, AWS, GCP) and cloud-native service design.
• Experience improving software development practices and SDLC processes.

Why You’ll Love Working Here

Benefits Cafeteria — annual budget you allocate to:

• Sports
• Medical
• Mental health
• Home office
• Languages.

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.

Our Culture & Core Values

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST

we’re open, honest, and have each other’s backs.

OWN YOUR GAME

we take initiative and own what we do.

ACCELER8

we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED

we grow through challenges and stay curious.

BULLETPROOF

we’re resilient, ready, and always have a plan.