Senior Back End JS Developer

Salary range: B2B - up to 43 E/h + VAT 💰

Ciklum is looking for a Senior Back End JavaScript Developer to join our team and work directly with our partner, Trustpilot 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.

About Trustpilot:

Trustpilot 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.

About the role:

As a Senior Back End JavaScript Developer, become a part of a cross-functional development team engineering experiences of tomorrow. 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: 

We are looking for seasoned engineers who are passionate about high-quality code and technical excellence:

• 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)

Desirable:

• Experience integrating AI/ML models or working with LLMs and Generative AI

• Familiarity with Google Cloud Platform (GCP) services, specifically BigQuery and Pub/Sub

What`s in it for you?

• Remote Collaboration: Enjoy the flexibility of remote work or join us in our office locations across Europe

• Human Connection: We value a great atmosphere and host team F2F workshops a few times a year to brainstorm and bond in person

• Continuous Growth: Benefit from a tailored education path, including internal meetups, a Udemy license, and company-paid certifications

• Comprehensive Care: We offer medical insurance, mental health programs, and a welcoming, open culture

• Global Reach: Your work will build solutions used by millions to promote trust and transparency online

Be bold, not bored!

If you're ready to build the heart of trust with a world-class engineering team, we'd love to see your application.