FlixMobility

Intercity bus and rail travel platform

Senior Full-Stack Software Engineer - Python/Java

Full-Stack EngineeringConfirmed live in the last 24 hours

Full-timeWarsaw, PolandPLN135 - PLN170 /hr

About the Job

Requirements

At least 5 years of professional experience in full-stack development, focusing on architecture, system design, and legacy product migration.
Extensive experience with Python and its ecosystem for developing new products.
Solid knowledge of Java for maintaining and further developing existing products.
Strong focus on quality assurance practices and technical standards throughout the product development lifecycle.
Hands-on experience with automated testing and different test runners.
Comfort with Agile methodologies for planning and executing development work.

Responsibilities

Develop contact center applications, focusing on scalable agent-facing interfaces and automation.
Conduct discovery to identify efficient and effective workflows.
Deliver solutions for a defined portfolio of products, contributing to business objectives.
Design and develop user-focused solutions tailored to product requirements and user needs.
Apply Agile methodologies to organize and execute the development process.
Develop and enhance products using modern technology stacks.
Make technical decisions within the scope of services provided, promoting technical excellence and consistency across solutions.

Rate: 135 – 170 PLN/hour (B2B)

We are looking for an experienced Software Engineer to join Flix on a freelance/service agreement basis (B2B contract). This is a contractor engagement for a seasoned professional with a full-stack mindset.

Scope of Services

Developing Flix’s contact center applications, with a focus on scalable agent-facing interfaces and automation. The role will involve extensive discovery to identify the most efficient and effective workflows.

Our tech stack

Languages & Frameworks: Python, JavaScript, TypeScript, Java, flask, FastAPI, Node.js, React, Spring Boot.
Cloud Providers and IaC: AWS, Azure, Terraform, Serverless.
Data Layer: Elasticsearch, Snowflake
Streaming and Messaging Layer: Kafka.
Observability: Datadog, Kibana.

About the Engagement

Deliver solutions for a defined portfolio of products, contributing to business objectives.
Design and develop user-focused solutions tailored to product requirements and user needs.
Apply Agile methodologies to organize and execute the development process.
Develop and enhance products using modern technology stacks.
Make technical decisions within the scope of services provided, promoting technical excellence and consistency across solutions.

About You

Minimum 5 years of professional experience in full-stack development, with a focus on architecture, system design, and legacy product migration.
Extensive experience with Python and its ecosystem for the development of new products.
Solid knowledge of Java for the maintenance and further development of existing products.
Strong focus on quality assurance practices and technical standards throughout the product development lifecycle.
Hands-on with automated testing and experience with different test runners.
Comfortable with Agile methodologies in planning and executing development work.

Cooperation model

Cooperation based on a service agreement (B2B/freelance contract), not an employment contract.
You will operate as an independent contractor, responsible for delivering agreed services and submitting invoices
Location: open for contractors based in Poland

About the Company

FlixMobility

Intercity bus and rail travel platform

FlixMobility, now operating under the corporate brand Flix, is a travel technology company connecting passengers with intercity bus and rail services. Through brands including FlixBus and FlixTrain, it manages route planning, pricing, ticketing, marketing and the digital customer experience while transportation partners operate many vehicles. The platform serves travelers across Europe, North America and other markets. Its model combines software, network planning and partner operations to make long-distance ground travel bookable through a unified consumer service.

Company size: Not listed
Company stage: Not listed
Total funding: Not listed
Headquarters: Not listed
Founded: Not listed

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