Principal Software Engineer
We are transforming our Sofia studio into a high-performing Technology Hub, focused on building scalable, high-quality game development capabilities. As part of this transformation, we are looking for a Principal Software Engineer to play a critical role in shaping our technical direction, improving how we build software end-to-end, and enabling our teams to deliver faster, with higher quality. This is a hands-on technical leadership role. You will be expected not only to set direction, but also to go deep when needed — solving complex problems, guiding teams, and leading by example. Working closely with the Head of Technology, you will operate across multiple squads as a technical authority, ensuring we make the right decisions, maintain high engineering standards, and successfully deliver the technology changes required to support our growth.
- Act as a technical authority across multiple squads, guiding architecture, design, and engineering decisions.
- Drive the execution of technology strategy and transformation initiatives within the organisation.
- Lead and influence major technical changes (platform evolution, tooling, frameworks, performance improvements).
- Ensure high engineering standards across scalability, performance, security, and maintainability.
- Take a hands-on approach to solving complex technical problems and unblocking teams.
- Partner closely with the Head of Technology and Solution Architects to define and evolve system architecture.
- Establish, promote, and enforce engineering best practices (coding standards, testing, CI/CD, observability).
- Act as a custodian of software design, ensuring consistency and quality across systems.
- Proactively identify gaps, inefficiencies, and risks, and drive solutions without requiring direction.
- Support teams in breaking down complex problems into clear, executable work.
- Enable cross-team alignment and reduce silos across engineering teams.
- Mentor and coach engineers, tech leads, and senior engineers to elevate technical capability.
- Create an environment where teams are autonomous but aligned, with clear technical direction.
- Act as a multiplier, improving the effectiveness of multiple teams rather than a single squad.
- Support hiring and contribute to technical assessment and capability building.
- Champion a strong engineering culture focused on ownership, quality, and continuous improvement.
- Build strong working relationships across engineering, product, delivery, and platform teams.
- Lead by example through hands-on contribution and technical excellence.
- Proven experience operating as a Principal / Staff-level engineer or equivalent (required).
- Strong track record of owning technical direction across multiple teams or domains (required).
- Ability to make high-impact technical decisions with long-term implications (required).
- Experience leading large-scale system design and architectural evolution (required).
- Deep understanding of modern software engineering practices, including - Test-driven development (TDD); CI/CD and automation; Observability, monitoring, and performance optimisation (required).
- Experience improving software development lifecycle efficiency and reducing delivery friction (required).
- Strong advocate for clean architecture and maintainable systems (required).
- Strong hands-on experience with - Node.js, TypeScript, JavaScript, React; Java (backend systems) (required).
- Experience working with - AWS, Docker, Kubernetes, GitHub workflows / modern CI/CD pipelines (required).
- Ability to prototype, validate, and implement solutions directly (required).
- Practical understanding of AI tools and their application in software development (required).
- Ability to identify and implement AI-driven improvements in engineering workflows, tooling, or products (required).
- Strong communication and stakeholder management skills (required).
- Comfortable working across multiple teams and disciplines (required).
- Ability to clearly explain complex technical concepts to non-technical stakeholders (required).
- Experience in Agile environments (Scrum, Kanban) (required).
- Strong prioritisation and decision-making skills (required).
- Self-driven, proactive, and comfortable operating with minimal supervision (required).
- Experience in the gaming / gambling industry (nice-to-have).
- Experience working on high-scale, real-time systems (nice-to-have).
- Public GitHub repository or portfolio of work (nice-to-have).
- Discretionary annual bonus.
- 30 days paid leave.
- Health and Dental Insurance for you, your partner and your children (if you all live at the same address).
- Personal life insurance and disability coverage.
- Wellbeing fund.
- Continuous learning support for certifications and career growth.
- 550 EUR gift for newborn family member.
- 26 weeks Maternity leave at 100% pay and 4 week secondary (Paternity) also at 100% pay, no eligibility period applies.
- A sports’ card membership valid across the country.
- Discounts as a compliment form us among different services.
- Monthly food vouchers.
Flutter is the world’s leading online sports betting and gaming company, operating some of the most innovative, diverse and distinctive brands in the sector such as FanDuel, Sky Betting and Sky Gaming, Paddy Power, PokerStars, Betfair, Sportsbet, Tombola, Adjarabet, Sisal, Snai, Betnacional, Junglee Games and MaxBet. We have an unparalleled portfolio of world-class brands, global scale and challenger mindset, through which we excite and entertain our customers, in a safe and sustainable way. Using our collective power, the Flutter Edge, we aim to disrupt our sector, learning from the past to create a better future for our customers, colleagues and communities.