Senior Back End Engineer

About the Position

Ciklum is looking for a Senior Back End Engineer to join our team full-time in Poland. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts, and product owners, we engineer technology that redefines industries and shapes the way people live.

As a Senior Back End Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Project is on an incredible journey to become the universal symbol of trust. As the world's largest independent consumer review platform, they bring consumers and businesses together to foster transparency and improvement. With over 300 million reviews and 64 million monthly active users, the work we do together has a massive global impact, helping millions of people make better choices every day.

In this role - you are fully integrated into Trustpilot's feature team. You will join a cross-functional "full ownership" squad where you have a say in the direction of projects and technological choices. This specific project enhances trust and transparency by detecting and preventing fraudulent activities, such as fake reviews, and ensuring policy compliance through AI, data analysis, and scalable fraud detection systems. Your work will directly influence the integrity of the platform for over 64 million monthly users!

Responsibilities

• Collaborative Development: Work alongside Product, Design, and Data Science in a team that owns its product and codebase from end-to-end
• End-to-End Ownership: Participate in every stage of the lifecycle: from ideation and design to architecture, implementation, deployment, and maintenance
• System Design: Drive technical decision-making and build scalable backend services and high-volume data processing solutions for fraud detection using TypeScript
• Scale & Innovation: Build and maintain secure, distributed cloud services within an event-driven microservices architecture, focusing on backend stability and scalability
• Team Leadership: Support, coach, and inspire your colleagues with your technical expertise and a problem-solving mindset

Requirements

• Experience: 7+ years of professional software development experience, with a deep focus on backend engineering
• Core Tech: Strong, hands-on expertise with JavaScript, TypeScript, and Node.js
• AWS Infrastructure: Proven experience with API Gateway, Lambda, ECS, SQS, SNS, and DynamoDB, utilizing Infrastructure as Code (Terraform or CloudFormation)
• Architecture: Deep understanding of event-driven and microservice architectures, specifically using the Serverless Framework
• Databases: Proficiency with NoSQL (DynamoDB) and Relational databases (PostgreSQL)
• DevOps & Tooling: Experience with CI/CD (GitHub Actions), Docker, and orchestration tools (ECS, Kubernetes)

Nice to Have

• Experience integrating AI/ML models or working with LLMs and Generative AI
• Familiarity with Google Cloud Platform (GCP) services, specifically BigQuery and Pub/Sub
• Remote Collaboration: Enjoy the flexibility of remote work or join us in our office locations in Wrocław or Gdańsk

We Offer

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Flexibility: Enjoy flexibility – full remote working possibilities
• Care: We've got you covered with company-paid premium medical package through Luxmed
• Benefits: Access the MyBenefit cafeteria platform, allowing you to choose perks that best suit your lifestyle and needs

About the Company

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation-and your impact reaches millions.

Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.