Principal Engineer

Overview of the Role

As the Principal Engineer for our Campaign Platform , you will act as the technical authority driving architectural excellence, scalability, and operational reliability across our distributed systems and services. You’ll lead backend technical direction and collaborate closely with Team Lead, Software Engineers, Solution Architects, and QA to ensure our systems are secure, efficient, and resilient at scale.

What you'll do:

Technical Leadership & Architecture

Architect and Evolve Systems: Own the backend architecture vision across multiple services and domains. Design systems optimized for performance, observability, and scalability, ensuring they meet multi-market and multi-product requirements.

Technical Direction: Guide the evolution of our microservice and monolithic components, ensuring maintainability, performance, and clear service boundaries.

Problem Solving: Lead complex technical investigations, propose long-term solutions, and ensure alignment with architectural principles defined at the Tribe/Engineering level.

Code Quality & Standards: Define backend coding standards and enforce best practices in Node.js (NestJS) and related backend frameworks. Promote reliability through code reviews, automation, and CI/CD pipelines.

Collaboration & Delivery

Cross-Functional Collaboration: Partner with Product Owners, QA, DevOps, and other teams to define interfaces, data flows, and integration strategies that ensure seamless delivery.

Release Management: Support release activities by ensuring production readiness, performance validation, and rollback strategies are in place.

System Governance: Represent backend engineering decisions and dependencies in cross-tribe and company-wide architecture discussions.

Mentorship & Knowledge Sharing

Engineer Development: Mentor backend developers, fostering technical excellence, ownership, and growth across the team.

Best Practices: Champion backend engineering best practices in API design, data modeling, observability, and scalability.

Innovation: Encourage experimentation with new backend technologies, patterns, and cloud-native solutions that improve delivery and reliability.

Quality, Reliability & Automation

Test Strategy Collaboration: Work closely with QA and DevOps to ensure strong test automation coverage across unit, integration, and load testing layers.

Operational Excellence: Partner with SREs to ensure robust monitoring, alerting, and incident management processes are in place.

Quality Mindset: Promote a “build it right” culture—prioritizing security, performance, and long-term maintainability over short-term fixes.

Core Technologies

Node.js (NestJS) and TypeScript-based backend development

RESTful APIs and microservices

Message queues (Kafka)

PostgreSQL, Redis, and other persistence layers

CI/CD pipelines, containerization (Docker, Kubernetes), and cloud platforms

What you’ll bring:

5+ years of experience in backend and full-stack web application development, with at least 2+ years in a senior or lead role .

1+ years of experience in a leadership or mentoring role (e.g., Tech Lead, Senior Software Engineer guiding a sub-team), with demonstrated ability to coach and support technical team members; direct line management experience is a plus.

Proven hands-on experience with Node.js and NestJS (TypeScript) for building scalable, maintainable backend systems.

Familiarity with PHP/Laravel and Node.js API development , particularly in microservice or CMS-based projects.

Solid understanding of web application architecture , including RESTful API design, microservices patterns, and database modeling (PostgreSQL, MySQL, Redis).

Experience with message queues and asynchronous processing (e.g., Kafka, RabbitMQ).

Knowledge of CI/CD pipelines, containerization (Docker, Kubernetes), and cloud platforms (AWS preferred).

Strong grasp of code quality, testing strategies, and security best practices for backend services.

Excellent collaboration and communication skills, with experience working in cross-functional teams (Product, QA, DevOps).

Personal Attributes

Analytical and synthesis skills

Thoughtful and strategic thinker

Problem-solving skills

Autonomy and resourcefulness

Attention to detail

Flexibility in organizing work

Ability to work as part of a team

Ability to adapt to change

Results-driven

About Flutter CEE

We are Flutter Central & Eastern Europe (CEE).

As a proud member of the Flutter family - a global leader in sports betting and iGaming - we are building one of the Group’s most dynamic tech and product hubs in Central and Eastern Europe. We aren’t just here to participate. We’re here to change the game.

By uniting local powerhouses like MaxBet, Adjarabet.com, and Adjarabet.am, we combine deep regional expertise with the scale and strength of Flutter’s global platforms. We’re setting a new standard for entertainment, responsibility, and innovation - powered by real customer signals that shape everything we build.

Settling for the status quo isn’t in our DNA. We build systems designed to scale.

We’re moving faster, thinking bigger, and putting our customers exactly where they belong: at the heart of every decision. We start by listening to our customers and the communities we serve. What we see, hear, and learn become clear signals, and those signals quickly shape product decisions, better experiences, and responsible innovation.

Technology powers our ambition. The Signature System - our operating model - makes our signal-led approach repeatable and scalable across markets. It’s how we move fast and grow with confidence.

As part of Flutter, we benefit from the Group’s collective advantage - the Flutter Edge. It allows us to identify success in one market, replicate it across brands, and implement proven ideas quickly - with customers always at the forefront.

We’re a team of thousands, driven by a challenger mindset and a shared commitment to lead. We are shaping the future of iGaming in Central and Eastern Europe right here, right now, and our technology and product teams are defining what responsible innovation looks like in practice - not just in theory.

We are Flutter Central & Eastern Europe (CEE).

Built on experience. Built to lead.

Local champions. Global infrastructure.

Why choose us

At Flutter CEE, people have access to vast opportunities for career growth and self-development. Our employee benefits package goes far beyond offering the minimum: We support our people in becoming their best version at work and beyond - and our benefits reflect that commitment.  

These are some of the benefits included in our employee package:  

Generous annual leave 

Hybrid work

Individual health insurance 

Paid sick leave 

Paid maternity & paternity leave 

Family reward

Performance & referral bonuses 

Loyalty award