Senior Software Engineer Backend / Full Stack (Data and Reporting)

Design and build scalable RESTful APIs and backend services that power merchant-facing reporting and analytics features.
Develop full-stack features end-to-end—from backend data models and APIs through to frontend components and data visualizations.
Build and maintain responsive, accessible reporting dashboards and chart visualizations that help merchants make better business decisions.
Collaborate with product managers, designers, and data engineers to define requirements and deliver polished, high-quality experiences.
Contribute to system architecture decisions, including cloud infrastructure (AWS), containerization, and CI/CD pipeline improvements.
Conduct code reviews, establish technical standards, and mentor junior and mid-level engineers on best practices.
Implement monitoring, logging, and alerting solutions to ensure platform reliability and observability.

5+ years of professional backend or full-stack software engineering experience
Strong proficiency in Python; experience with Go and TypeScript or JavaScript is highly beneficial.
Solid experience building and consuming RESTful APIs, with a strong understanding of API design best practices.
Proficiency with React—comfortable building and maintaining complex component architectures and data-driven UIs.
Experience with relational and NoSQL databases, especially PostgreSQL and MongoDB.
Familiarity with cloud services, particularly AWS (IAM, S3, RDS, Lambda).
Comfortable with containerization and orchestration tools such as Docker and Kubernetes.
Strong experience with CI/CD pipelines and modern DevOps methodologies.
Strong communication skills and the ability to collaborate effectively with cross-functional teams.
Comfort with ambiguity and the judgment to make sound product and technical decisions independently.

Experience with infrastructure as code (IaC) tools and best practices.
Background or interest in data engineering concepts—familiarity with tools like ClickHouse, Kafka, Snowflake, or ETL pipelines is a plus.
Knowledge of data observability and monitoring tools, including Grafana and OpenTelemetry.
Experience building analytics dashboards or reporting interfaces.
Experience in the restaurant or hospitality technology sector.

Competitive pay: 19 500 - 24 400 PLN net on B2B.
Training budget 3500 PLN gross per year.
Access to e-learning platforms (O’Reilly).
Fully paid private healthcare in LuxMed.
Access to the Worksmile platform with a monthly top-up.
Subsidized access to breakfast and lunch through the vending machine in Kraków office, and lunches in Gdańsk office once a week.
Group English classes with a native speaker.
New Macbook Pro, 4K monitors or whatever tools you need.
Flexible working hours.
New, modern, bright and comfortable office space in the city centre.
A lot of free parking spots around the office.
Access to the company’s library.
Great working atmosphere.
Chill out room with a PlayStation and games.
Free snacks and beverages in a kitchen.
Company parties and social activities.
Employee referral program.
Relocation Package within Poland.

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