CrawlJobs Logo
Circle K Logo Circle K · IT - Software Development

Junior Backend Engineer

Poland, Warszawa Employment contract · Job Posted July 29, 2025
Apply Position
Job Link Share

Job Description

We are looking for a Junior Software Developer who can help us on our journey. Circle K mission is simple: we want to make journeys easy and more enjoyable for our costumers. Have you heard about frictionless fueling, smart checkout, mobile payment for car wash? It's just a small piece of our Customers Services product portfolio, much more to come. We are global so you will have a chance to work with engineers around the globe. We are technology geeks so you will have a chance to exchange the knowledge and learn from more experienced developers. We do want to keep improving, keep being better version of us every day, inspect and adapt through agile ways of working.

Job Responsibility

  • Plan, execute and deliver on the roadmap for our solutions
  • Work with the team of experienced developers to build best in class software following market best practices and standards
  • Develop micro-services in Java 11+ and deploy them to cloud environment
  • Build distributed systems
  • Work in a Scrum team, coordinate with PO, SM, Architects and Testers
  • Engage and contribute to product / ideas, both from technical and business perspective
  • Work with CI/CD systems and Code Reviews, contribute ideas and improvements to existing workflow
  • Share knowledge across the team

Requirements

  • Computer Science / IT graduate
  • Java 11+ with Spring Boot basic knowledge
  • Basic knowledge about public clouds, AWS, (ECS, Kubernetes, Terraform), Azure
  • Basic experience in test automation for unit and integration testing
  • Basic experience with requirement engineering and working with a product backlog
  • Good English skills both spoken and written

Nice to have

  • Scrum
  • SAFE
  • TDD, BDD
  • Security at scale

What we offer

  • Annual bonus
  • Private medical care
  • Possibility for author's tax deduction
  • Cafeteria Platform/Multisport
  • English lessons subsidized by the company
  • Group insurance
  • Attractive discounts for products and services at our stations
  • Employee stock purchase plan
  • LYRA
  • Modern and convenient office
  • Trainings & possibility to develop skills in a wide international environment
Circle K - All Job Offers

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Suggested Tags: Frontend Developer Secretary Talent Manager Salesforce Administrator Data Analyst
Similar Jobs for

Junior Backend Engineer

8 matching positions

Junior Backend Engineer

Cozycozy is the only platform that gives you real-time access to all available h...
Location
Location
Hungary , Budapest
Salary
Salary:
Not provided
cozycozy.com Logo
cozycozy
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 1-2 years of professional experience in software engineering, preferably in a back-end focused role, or equivalent project experience
  • Core stack knowledge and experience in Node.js, JavaScript & TypeScript
  • Familiarity with either NoSQL (MongoDB) or relational (PostgreSQL) databases
  • A basic understanding of web concepts is a plus (cookies, sessions handling etc)
  • High curiosity and a strong desire to learn complex system architecture, data integration techniques, and reactive programming principles (RxJS)
  • A meticulous approach to writing code and debugging data synchronization issues
  • Good written and verbal communication skills in English, suitable for a collaborative international environment
  • An ability to take ownership of assigned tasks and seek help proactively when blocked
  • Genuine enthusiasm for technology, travel, and joining a high-growth company
Job Responsibility
Job Responsibility
  • Integration Development & Support: Assist Senior Engineers in developing, testing, and deploying integrations with new accommodation partners using Node.js/TypeScript
  • Write and maintain reliable code to fetch both static partner information and real-time price and availability data, utilizing partner APIs or web scraping tools
  • Actively participate in debugging and resolving issues related to existing integrations to ensure data accuracy and reliability
  • Back-end System Contribution: Contribute to the maintenance and enhancement of back-end services responsible for data ingestion and processing, learning about performance optimization and scalability
  • Perform basic operations and assist in optimizing queries across our MongoDB and PostgreSQL databases, under senior guidance
  • Learn and apply concepts of RxJS and reactive programming within the Node.js environment to manage data streams efficiently
  • Learning & Collaboration: Participate in regular code reviews, offering constructive feedback and learning best practices for writing clean, well-tested, and maintainable code
  • Create and update technical documentation for new and existing partner integrations
  • Collaborate effectively with the engineering team, product managers, and business stakeholders to understand integration requirements
What we offer
What we offer
  • Opportunity to learn from and be mentored by Senior engineers, accelerating your professional and technical growth
  • A stimulating and supportive work environment with an international team (12 nationalities represented) that is passionate about travel and innovation
  • Strong entrepreneurial and open-minded culture with numerous projects to imagine and lead
  • Enjoy our office in the center of Budapest with unlimited coffee, tea, drinks, and snacks
Read More
Arrow Right

Junior Backend Engineer

We are looking for a Junior Backend Engineer to join our teams in Warsaw. Bolt e...
Location
Location
Poland , Warsaw
Salary
Salary:
Not provided
bolt.eu Logo
Bolt
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Thrive in fast-paced, customer-feedback-driven environments with empathy for end-users
  • Excel in making data-driven, metric-based decisions, and leading initiatives to completion
  • Have expertise in microservice architecture, API design, and distributed high-volume systems
  • Have strong principles in writing clean, secure, and maintainable code that is readable and testable
  • Are experienced with cloud systems (AWS, Azure, Google Cloud) and relational databases
  • Are familiar with real-time, asynchronous systems, and highly available infrastructure is a plus
Job Responsibility
Job Responsibility
  • Architecting, designing, developing, and deploying Bolt's growing backend systems
  • Contributing ideas and constructive feedback to our product development roadmap
  • Helping lead features/initiatives from idea to positive execution
  • Working closely with Product to slice and dice scope and deliver piece by piece
  • Sharing your knowledge by giving tech talks, and promoting appropriate tech and engineering best practices in and outside of the team
What we offer
What we offer
  • Get a rewarding salary and stock option package
  • Enjoy the flexibility of working in a hybrid mode with a minimum of 2 days in the office each week
  • Take care of your physical and mental health with our wellness perks
  • Fulltime
Read More
Arrow Right

Junior Backend Engineer

We are hiring for multiple teams at Glovo, with diverse scopes, Growth, Customer...
Location
Location
Spain , Barcelona
Salary
Salary:
Not provided
deliveryhero.com Logo
Delivery Hero
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Computer Science or similar degree
  • From 6 months up to 2 years of relevant full-time experience
  • Strong Java or other high level language skills
  • Strong in depth understanding of data-structures and space & time complexity of the algorithms
  • Knowledge of object-oriented programming and software architecture
  • Ability to write good unit tests is a must
  • Knowledge of relational databases and other approaches to data management
  • Analytical and problem-solving skills
  • Vivid interest in at least one area outside of coding (architecture, algorithms, optimization, automation, scalability, etc.)
  • Strong written and verbal communication skills in English
Job Responsibility
Job Responsibility
  • Actively collaborate with your colleagues and learn from each other in a supportive environment that allows you to grow, develop and make a difference
  • Develop software using modern engineering approaches and agile principles
  • Make our technology and our team scale as the business grows
  • Own your deliverables from start to finish
  • Deliver high quality solutions
  • Participate in high-level technical decisions
  • Mentor and empower other developers around you
What we offer
What we offer
  • An enticing equity plan *if applicable
  • Top-notch private health insurance to keep you at your peak
  • Monthly Glovo credit to satisfy your cravings
  • Discounts on transportation, food, and even kindergarten expenses or office-based nursery
  • Discounted gym memberships to keep you energized
  • The freedom to work from home two days a week, and the opportunity to work from anywhere for up to three weeks a year
  • Enhanced parental leave (*if applicable)
  • Online therapy and wellbeing benefits
  • Fulltime
Read More
Arrow Right

Junior Backend Engineer

Seeking a Junior Backend Engineer (Python). At WE ARE META, we focus on finding ...
Location
Location
Portugal , Porto; Lisbon
Salary
Salary:
Not provided
wearemeta.io Logo
We Are Meta
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Some months of professional experience developing with Python
  • Knowledge of Bash scripting and Unix
  • Understanding of design patterns and software architecture
  • Fluency in English (at least a B2 level)
  • Immediate availability to start
  • Availability for a hybrid work model, 3 times a week in the Porto or Lisbon office (requires Portuguese or other EU citizenship, or a valid Portuguese work permit)
What we offer
What we offer
  • Welcome kit
  • Opportunities for career progression
  • Health insurance
  • Coverflex meal card
  • Other protocols and special discounts
Read More
Arrow Right

Junior Backend Engineer - Typescript

Cozycozy is the only platform that gives you real-time access to all available h...
Location
Location
Hungary , Budapest
Salary
Salary:
Not provided
cozycozy.com Logo
cozycozy
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 1-2 years of professional experience in software engineering, preferably in a back-end focused role, or equivalent project experience
  • Core stack knowledge and experience in Node.js, JavaScript & TypeScript
  • Familiarity with either NoSQL (MongoDB) or relational (PostgreSQL) databases
  • A basic understanding of web concepts is a plus (cookies, sessions handling etc)
  • High curiosity and a strong desire to learn complex system architecture, data integration techniques, and reactive programming principles (RxJS)
  • A meticulous approach to writing code and debugging data synchronization issues
  • Good written and verbal communication skills in English, suitable for a collaborative international environment
  • An ability to take ownership of assigned tasks and seek help proactively when blocked
  • Genuine enthusiasm for technology, travel, and joining a high-growth company
Job Responsibility
Job Responsibility
  • Integration Development & Support: Assist Senior Engineers in developing, testing, and deploying integrations with new accommodation partners using Node.js/TypeScript
  • Data Collection: Write and maintain reliable code to fetch both static partner information and real-time price and availability data, utilizing partner APIs or web scraping tools
  • Troubleshooting: Actively participate in debugging and resolving issues related to existing integrations to ensure data accuracy and reliability
  • Back-end System Contribution: Contribute to the maintenance and enhancement of back-end services responsible for data ingestion and processing, learning about performance optimization and scalability
  • Database Operations: Perform basic operations and assist in optimizing queries across our MongoDB and PostgreSQL databases, under senior guidance
  • Asynchronous Logic: Learn and apply concepts of RxJS and reactive programming within the Node.js environment to manage data streams efficiently
  • Learning & Collaboration: Participate in regular code reviews, offering constructive feedback and learning best practices for writing clean, well-tested, and maintainable code
  • Documentation: Create and update technical documentation for new and existing partner integrations
  • Teamwork: Collaborate effectively with the engineering team, product managers, and business stakeholders to understand integration requirements
What we offer
What we offer
  • Opportunity to learn from and be mentored by Senior engineers, accelerating your professional and technical growth
  • A stimulating and supportive work environment with an international team (12 nationalities represented) that is passionate about travel and innovation
  • Strong entrepreneurial and open-minded culture with numerous projects to imagine and lead
  • Enjoy our office in the center of Budapest with unlimited coffee, tea, drinks, and snacks
Read More
Arrow Right

Junior Backend Software Engineer (Python)

The selected candidate will join the software development team responsible for a...
Location
Location
Italy , Bologna
Salary
Salary:
Not provided
prometeia.com Logo
Prometeia
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Degree in Computer Science, Software Engineering, or a related field (or close to completion)
  • Solid foundations in software engineering principles and programming concepts
  • Basic understanding of backend architectures and web-based applications
  • Familiarity with Git for version control, including the use of GitHub
  • Motivation to learn, attention to quality, and ability to work effectively in a team environment
  • Good written and spoken English in a professional and technical context
Job Responsibility
Job Responsibility
  • Contribute to the development and maintenance of backend services and APIs
  • Implement software components in accordance with defined architectural and coding standards
  • Collaborate with team members to analyze requirements and support their technical implementation
  • Apply secure coding practices and follow internal guidelines to ensure system security, reliability, and robustness
  • Participate in code reviews and technical discussions to support continuous learning
  • Support testing, debugging, and system improvement activities
What we offer
What we offer
  • Total Compensation (fixed and variable components)
  • Welfare Plan
  • Benefits for well-being
  • Smart working (remote flexibility)
  • People Program for evaluation and growth
  • Training (average 11 days per year)
  • Win/Win Policy (referral bonus)
  • Phygital Management via app
  • Diverse and inclusive community
  • LEED Gold Certified headquarters
  • Fulltime
Read More
Arrow Right

Backend Software Engineer / Senior Software Engineer- Kusto

Are you excited by the challenge of redefining how people explore and analyze ma...
Location
Location
Israel , Tel Aviv, Herzliya
Salary
Salary:
Not provided
https://www.microsoft.com/ Logo
Microsoft Corporation
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years of technical engineering experience with coding in languages including, but not limited to, C#, Python or Java
  • 2+ years building and running services in a cloud environment (Azure, AWS, or GCP)
  • Experience in designing and operating large-scale distributed systems with high availability and reliability
Job Responsibility
Job Responsibility
  • Design, develop, and improve cloud-native services that are scalable, secure, and easy to operate
  • Drive architectural decisions and lead the development of major components in a distributed, high-SLA system
  • Collaborate with cross-functional teams in ILDC and abroad to deliver end-to-end solutions
  • Conduct code and design reviews and mentor junior engineers to grow technical excellence across the team
  • Help shape the future of real-time analytics in Microsoft Fabric RTI, with customer impact as your north star
  • Fulltime
Read More
Arrow Right

Senior Backend Engineer

At Commure, our mission is to simplify healthcare. We have bold ambitions to rei...
Location
Location
United States , Mountain View
Salary
Salary:
140000.00 - 240000.00 USD / Year
helpcare.ai Logo
Helpcare AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field, or equivalent extensive experience
  • 4+ years of professional experience in software development industry experience
  • Strong Backend Programming Skills (We use Python and Go)
  • General Understanding of Containers and Cloud (Docker, Kubernetes)
  • Track record of strong execution and ability to drive work from ideation to successful implementation
  • Strong debugging and problem-solving skills and a history of demonstrated resourcefulness
  • Strong communication skills and the ability to interface with both technical and non-technical stakeholders
  • Experience in environments where you have to ship quickly. We move fast and deploy daily
  • Excitement to work in a high-impact field with a builder attitude
  • Attention to detail around user experience and customer needs
Job Responsibility
Job Responsibility
  • Design and influence decisions that affect our backend architecture for scalable, AI-powered healthcare solutions
  • Be a part of a tremendously fast-paced team that celebrates large ambition and making decisions quickly
  • Work across the entire technology stack, including but not limited to Python, Go, FastAPI, Flask, and other frameworks
  • Lead technical planning and execution for new features, balancing technical feasibility, usability, and business impact
  • Establish and enforce best practices for code quality, testing, and deployment
  • Mentor junior engineers, guiding backend engineering, design patterns, and coding standards
  • Collaborate with product managers, designers, and clinical experts to translate requirements into intuitive and efficient UI solutions
  • Work directly with customers to solve their issues daily
  • Fulltime
Read More
Arrow Right