Back End JavaScript Developer

Ciklum; Polska; Remote; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Remote work

Luxmed medical package

Udemy access

Language courses

MyBenefit platform

Certifications

Job summary

Ciklum is seeking a senior backend engineer to join Trustpilot project with fully remote work options. You will integrate into a cross-functional squad, owning backend services and crafting scalable fraud-detection features using TypeScript on AWS.

You will collaborate with top engineers, contribute to end-to-end delivery, and benefit from Udemy access, certifications, and company-paid medical coverage. Poland-based candidates are welcome.

Qualifications

• 5+ years of professional software development experience, backend focus.
• Hands-on AWS experience with serverless and microservices.
• Strong sense of ownership and ability to drive features end-to-end.

Responsibilities

• Collaborate with Product, Design, Data Science, and backend engineers in a cross-functional squad.
• Design and implement high-volume, scalable data processing for fraud detection using TypeScript.
• Grow autonomy by delivering end-to-end features with minimal supervision.
• Build secure, distributed cloud services in an event-driven microservices architecture.
• Participate in architecture discussions, deployment, monitoring, and production maintenance.
• Contribute to code reviews and implement architectural feedback.

Skills

Backend engineering

AWS cloud

Serverless Framework

NoSQL & PostgreSQL

CI/CD (GitHub Actions)

Docker & Kubernetes

AI-assisted development

Independent ownership

Code reviews & collaboration

Tools

Terraform

CloudFormation

Docker

Kubernetes

ECS

TypeScript

Job description

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 the role:

In this role, you will be fully integrated into Trustpilot's feature team. You will join a cross-functional squad that takes ownership of its product area, collaborating closely with senior engineers while contributing your own voice to technical discussions and implementation 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, Data Science, and senior backend engineers in a cross-functional squad that owns its product and codebase end-to-end
• System Implementation & Design: Partner with senior engineers to design backend services, and independently implement high-volume, scalable data processing solutions for fraud detection using TypeScript
• Growing Autonomy: Take on complex backend tasks alongside senior developers, transitioning over time into delivering end-to-end features and services with minimal day-to-day supervision
• Scale & Reliability: Build and maintain secure, distributed cloud services within an event-driven microservices architecture, focusing on code quality, testing, stability, and performance
• Lifecycle Ownership: Participate across the development lifecycle - from technical grooming and architecture discussions to deployment, monitoring, and production maintenance
• Continuous Improvement: Actively participate in constructive code reviews, incorporating architectural feedback from senior colleagues to elevate code health and engineering best practices

Requirements:

• Experience: 5+ years of professional software development experience, with a solid focus on backend engineering
• Cloud Infrastructure: Solid, hands-on experience with AWS services - including API Gateway, Lambda, ECS, SQS, SNS, and DynamoDB - utilizing Infrastructure as Code (Terraform or CloudFormation)
• Architecture: Practical experience building and maintaining event-driven and microservice architectures, preferably using the Serverless Framework
• Databases: Solid proficiency with NoSQL (DynamoDB) and relational databases (PostgreSQL)
• DevOps & Tooling: Working experience with modern CI/CD pipelines (such as GitHub Actions), Docker, and container orchestration platforms (ECS or Kubernetes)
• AI-Assisted Development: Hands-on experience developing with AI-assisted engineering tools to accelerate workflows and code delivery, with a strong preference for Claude Code
• Independence & Ownership: A proven track record of taking user stories and technical specs from inception to production release, proactively resolving blockers, and working with increasing self-direction
• Collaboration & Coachability: An eagerness to learn from and pair with senior team members, absorb architectural guidelines, and ask the right questions when tackling ambiguous technical challenges

What's in it for you?

• 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 us:

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!