Senior Cloud Backend Engineer (TypeScript, , AWS Lambda)

Senior Cloud Backend Engineer (TypeScript AWS Lambda)

Location: Poland - Hybrid (Kraków or Wroclaw)
Contract: B2B Full-Time

Join the Future of Digital Tech with Kolomolo

At Kolomolo we dont just follow trends - we set them. As a global supplier of IT services and digital modernization solutions we help businesses embrace cutting-edge technology to optimize their operations. Now we are growing and looking for fresh talent to grow with us.

Are you proactive tech-savvy and eager to build your career in IT This role could be your perfect fit.

The Project

You will join an international engineering team responsible for developing and maintaining a cloudnative serverless platform that supports critical backend services across a largescale enterprise environment. The system is built entirely on AWS using eventdriven and microservices architectures designed to handle highvolume asynchronous data flows and integrations with multiple external partners.

The primary goals of the platform are to:

• Deliver reliable and scalable backend services powered by serverless technologies such as AWS Lambda Event Bridge and API Gateway.

• Ensure seamless data exchange across distributed microservices and external vendor systems.

• Provide endtoend visibility into asynchronous processes system events and integration workflows.

• Maintain consistency resilience and security across multisource data pipelines leveraging DynamoDB SQS SNS and S3.

• Support a growing ecosystem of micro frontends and internal tools backed by modern CI/CD automated testing and IaC practices.

Because the platform ingests and processes data from many independent systems automated processes partner integrations and userdriven events validation error handling monitoring and observability are key components of the domain.

About the Role

As a Senior Cloud Backend Engineer (TypeScript AWS Lambda) you will play a key role in building and evolving cloudnative serverless backend services that power core business capabilities. You will work within a microservices and eventdriven architecture collaborating closely with Architects SREs and crossfunctional team members to ensure reliability scalability and security across the platform.

You will design and implement backend components using AWS serverless technologies such as Lambda API Gateway EventBridge DynamoDB SNS and SQS while contributing to the ongoing evolution of CI/CD and automation practices. Although the broader ecosystem includes Vue 3 and micro frontends your focus will remain predominantly backenddriven with occasional crossfunctional collaboration when needed.

What Youll Be Doing

Your responsibilities will center around developing backend microservices improving cloudnative workflows and supporting distributed systems across the platform. On a daily basis you will:

• Build and enhance backend microservices using and TypeScript.

• Implement cloudnative solutions leveraging AWS Lambda API Gateway EventBridge and DynamoDB.

• Drive improvements in testing quality by adding unit integration and performance test coverage.

• Work on asynchronous and distributed systems optimizing reliability and eventdriven flows.

• Collaborate with Architects & SREs to follow security scalability and operational best practices.

• Participate in architectural discussions and contribute to technical decisionmaking.

• Integrate with external partners and vendors across multiple domains.

• Support continuous delivery processes through GitLab CI and internal automation improvements.

• Promote high code quality and team collaboration through mentoring and knowledge sharing.

Must Have Skills

The successful candidate will bring strong handson experience with cloudnative backend development and modern engineering practices including:

• Productionlevel expertise in TypeScript and .

• Experience developing and maintaining microservices architectures.

• Solid understanding of AWS services including Lambda API Gateway EventBridge DynamoDB S3 SNS SQS.

• Proficiency with test automation and the full testing pyramid using Jest SuperTest Cypress and related tools.

• Experience working in agile crossfunctional teams and collaborating with product and design.

• Ability to lead through mentorship constructive feedback and technical knowledge sharing.

• Strong communication skills in Polish and English.

• A proactive openminded approach focused on delivering business value within distributed systems.

Nice to Have

Candidates with the following experience will be at an advantage:

• Creating and managing GitLab CI/CD pipelines.

• Experience with Backstage (Developer Portal).

• Developing and maintaining Grafana monitoring dashboards.

• Working with frontend solutions built on micro frontends or Vue 3.

• Familiarity with Kubernetes AWS CDK or Terraform.

What is in It for You

• Competitive salary and benefits.

• Career development opportunities in a growing tech company.

• Continuous learning culture: mentorship internal training and certifications.

• Flexible agile work environment (remote hybrid or on-site in Kraków).

• Office perks: great coffee tea fresh fruit snacks and a fun atmosphere.

• Flat management structure where your voice matters.

• Regular team events and a social supportive work culture.

• B2B contract or Contract of Mandate (Umowa Zlecenie).

Why Join Kolomolo

At Kolomolo we prioritize innovation agility and autonomy. Our teams have the freedom to own their work share ideas and make meaningful contributions. Inspired by Scandinavian values we believe in work-life harmony and creating an inclusive culture where everyone thrives.

You will be part of a passionate skilled and friendly team that works hard and celebrates together. Here you can build your career on your own terms with opportunities to grow learn and make a real impact.

Our Flat Structure & The Culture of Inclusion

At Kolomolo we break the corporate mold. We offer:

• Agile Teams & Autonomy: No micromanagement. Youll own your projects and enjoy the freedom to innovate.

• Work-Life Harmony: Inspired by Scandinavian values we prioritize balance and flexibility where remote work and asynchronous collaboration are in our DNA.

• Learning & Growth: Continuous learning is at our core. We reward hard work value smart ideas and foster an environment of mutual respect and trust.

• Inclusive Culture: We believe in DEI: diversity equity and inclusion. We are committed to creating an environment where every individual regardless of background identity or experience feels valued respected and empowered to thrive.

Join Kolomolo and elevate your career with cutting-edge technology a supportive team and a company that truly values your input.

Ready for the next step Apply now at and start an exciting journey of growth and innovation with us!