Middle Back End (JS) Engineer

Salary range: B2B - 23-25 E/h + VAT 💰

Ciklum is looking for a Middle 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.

About the role:

As a Middle Back End Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.

Responsibilities:

• Develop and maintain secure, scalable APIs and services on AWS using TypeScript

• Write clean, efficient, and testable code for both backend and frontend applications

• Collaborate closely with senior engineers, product managers, and designers to translate requirements into technical solutions

• Implement security best practices in your code to protect user data and ensure platform integrity

• Contribute to the entire development lifecycle, from planning and implementation to deployment and maintenance

• Troubleshoot, debug, and upgrade existing software to enhance functionality and performance

• Participate actively in code reviews, providing and receiving constructive feedback to maintain a high-quality codebase

Requirements:

• 3+ years of professional experience in backend development

• Strong proficiency with TypeScript and Node.js

• Experience building and consuming RESTful or GraphQL APIs

• Experience with core AWS services (e.g., Lambda, SQS, API Gateway, S3)

• Familiarity with containerization using Docker

• Experience with NoSQL (e.g., MongoDB, DynamoDB) and/or relational (e.g., PostgreSQL) databases

• A good understanding of web security principles and best practices

• Strong problem-solving skills and a passion for writing quality code

• Upper-intermediate or higher level of spoken and written English

Desirable:

• Hands-on expertise in React

• Familiarity with CI/CD practices and tools (e.g., Jenkins, GitLab CI, GitHub Actions)

• Experience with monitoring and logging tools (e.g., CloudWatch, Datadog)

• Working experience with .Net or Python is a plus

• Experience with GCP and services like BigQuery

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 medical insurance, mental health support, and financial & legal consultations

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.

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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.