Senior Software Engineer (Backend-Golang)- Betnacional, Hybrid

Senior Software Engineer (Backend-Golang)- Betnacional, Hybrid

Senior Software Engineer (Backend) 1

About Betfair Romania Development

Betfair Romania Development is the largest technology hub of Flutter Entertainment, with over 2,000 people powering the world’s leading sports betting and iGaming brands. Exciting, immersive and safe experiences are delivered to over 18 million customers worldwide, from our office in Cluj-Napoca. Driven by relentless innovation and commitment to excellence, we operate our own unbeatable portfolio of diverse proprietary brands such as FanDuel, PokerStars, SportsBet, Betfair, Paddy Power, or Sky Betting & Gaming.

Our Values

The values we share at Betfair Romania Development define what makes us unique as a team. They empower us by giving meaning to our contributions, and they ensure that we consistently strive for excellence in everything we do. We are looking for passionate individuals who align with our values and are committed to making a difference.
Win together | Raise the bar | Got your back | Own it | Positive impact

About Betnacional

Founded in 2021, Betnacional was among the first betting platforms to secure a definitive operating license in Brazil. Known for its speed, innovation, and strong connection with Brazilian players, Betnacional combines cutting-edge technology with a deep understanding of the national market. In 2025, Betnacional together with Betfair Brazil have established Flutter International’s fifth region: Flutter Brazil.

Role Overview

As a Senior Backend Engineer within a cross-functional agile team, you will play a key role in shaping backend systems and services, contributing to architecture, system design, and engineering excellence. You will own the delivery of critical backend services and infrastructure, making informed technical decisions that balance scalability, performance, security, and business outcomes. You will contribute to technical direction, support best practices, and help elevate engineering capability across the team.

Key Accountabilities & Responsibilities

Product & Delivery Ownership

• Own the delivery of backend product outcomes, operating effectively in complex and ambiguous problem spaces.
• Drive technical solutions that support business goals, platform scalability, and long-term sustainability.
• Contribute to Agile delivery through estimation, planning, feedback, and participation in ceremonies.
• Make data-driven decisions with a bias toward action, quality, and measurable impact.
• Ensure system reliability, performance, and customer impact are central to technical decisions.

Software Engineering & Development

• Design, develop, test, and maintain high-quality backend services and APIs.
• Deliver scalable, maintainable, and secure solutions aligned with engineering best practices.
• Enhance, refactor, and troubleshoot existing systems and services.
• Apply deep technical knowledge to solve complex system and performance challenges.
• Leverage approved technologies, frameworks, and standards effectively.
• Work within architectural guidelines while constructively influencing and evolving them.
• Define service interfaces, API contracts, and data models.

Platform Accountability

• Contribute to the reliability, scalability, and resilience of backend platforms.
• Support platform health, maintenance, and continuous improvement initiatives.
• Drive adoption of tooling, frameworks, and engineering standards.
• Promote transparency around system behaviour, dependencies, and changes.
• Influence backend architecture, technical direction, and platform roadmap.
• Participate in backlog prioritisation with a focus on technical debt and platform evolution.
• Demonstrate commercial awareness when making architectural and technical decisions.

Solution Delivery & Stakeholder Collaboration

• Prepare and maintain technical documentation, solution designs, and architectural artefacts.
• Communicate complex technical concepts clearly to both technical and non-technical stakeholders.
• Collaborate closely with frontend engineers, DevOps, and architects to define end-to-end solutions.
• Represent backend solutions and trade-offs in architectural and technical forums.
• Evaluate and assess the success of technical changes post-release.

Support, Reliability & Continuous Improvement

• Ensure systems are designed for observability, monitoring, alerting, and logging.
• Lead investigation and resolution of production issues and incidents.
• Communicate clearly with stakeholders during incidents and post-incident reviews.
• Take ownership of system-level issues through to resolution.
• Conduct root cause analysis and drive preventative improvements.
• Continuously learn, mentor others, and contribute to engineering capability uplift.

Skills, Capabilities & Experience Required

Technology Stack

Backend:

• Golang

Frontend (Supporting Knowledge):

• React, TypeScript

Infrastructure & DevOps:

• Docker, Kubernetes
• CI/CD pipelines

Education & Training

• High school diploma or equivalent (Ensino médio completo required)
• Ongoing professional development and self-directed learning encouraged
• Excellent written and verbal communication skills in English; Portuguese is highly beneficial

Core Skills & Technical Competencies (Must-Have)

• 6–8+ years of professional software development experience in large-scale or enterprise environments.
• Proven experience designing, architecting, and scaling distributed systems and microservices.
• Deep understanding of Go fundamentals, idiomatic design, testing, and error handling.
• Strong expertise in concurrency patterns in Go (goroutines, channels, sync primitives).
• Experience designing and building RESTful APIs and/or gRPC services.
• Strong experience with relational databases (PostgreSQL, MySQL) and SQL optimisation.
• Experience with NoSQL databases such as MongoDB, Redis, or Cassandra.
• Deep understanding of event-driven architectures and messaging systems (Kafka, RabbitMQ, SNS/SQS).
• Strong knowledge of containerisation and orchestration using Docker and Kubernetes.
• Experience with cloud platforms (AWS, GCP, or Azure) and cloud-native architectures.
• Solid understanding of security best practices (OAuth2, JWT, encryption, OWASP Top 10).
• Experience establishing coding standards and architectural patterns across teams.
• Strong focus on performance optimisation, caching strategies, and system tuning.
• Expert understanding of CI/CD pipelines and DevOps practices.
• Experience with monitoring and observability tools (Prometheus, Grafana, ELK).
• Proven experience leading within Agile teams and mentoring engineers.

Additional Skills & Experience (Nice-to-Have)

• Experience with gRPC and Protocol Buffers.
• Familiarity with infrastructure as code tools (Terraform, CloudFormation, Ansible).
• Experience with API gateways and service mesh technologies (Kong, Istio, Envoy).
• Knowledge of event sourcing and CQRS patterns.
• Familiarity with TypeScript and React for full-stack collaboration.
• Experience implementing GraphQL server solutions.
• Experience with chaos engineering and resilience testing.
• Contributions to open-source projects or internal frameworks.
• Experience designing multi-tenant systems.
• Knowledge of data pipelines, analytics, or machine learning integration.
• AI tools proficiency for code generation, refactoring, system reasoning, and testing.

Benefits

• Hybrid & remote working options
• €1,000 per year for self-development
• Company share scheme
• 25 days of annual leave per year
• 20 days per year to work abroad
• 5 personal days/year
• Flexible benefits: travel, sports, hobbies
• Extended health, dental and travel insurances
• Customized well-being programmes
• Career growth sessions
• Thousands of online courses through Udemy
• A variety of engaging office events

Disclaimer

We are an inclusive employer. By embracing diverse experiences and perspectives, we create a lasting, positive impact for our employees, customers, and the communities we’re part of. You don't have to meet all the requirements listed to apply for this role. If you need any adjustments to make this role work for you, let us know, and we’ll see how we can accommodate them.

We thank all applicants for their interest; however, only the candidates who best meet the job requirements will be contacted for an interview.

By submitting your application online, you agree that your details will be used to progress your application for employment. If your application is successful, your details will be used to administer your personnel record. If your application is unsuccessful, we will retain your details for a period no longer than three years, to consider you for prospective roles within the company.