Software Engineer III, File Systems

At Euronet, we are not just developers of payment solutions; we are pioneers in transforming the global landscape of financial transactions. As a renowned leader in payment processing and cross-border transactions, our innovative offerings—from mobile wallets to real-time payment platforms—are driving digital transformation across more than 160 countries.We …

MyDr, part of the Docplanner group alongside m.in and ZnanyLekarz, develops and improves cloud-based Electronic Medical Documentation (EDM) and clinic management software. Since 2017, MyDr has served over 65,000 users, supporting safe and efficient medical practice operations across Poland. As a Junior Product Implementation Specialist based in Warsaw, this role centers on helping clinics in the Mazowieckie and Łódzkie regions adopt MyDr's system. Around 70% of implementations take place on-site, where hands-on support and training are essential. The position is part of the Onboarding team and involves both technical setup and relationship-building with medical staff. What you will do Lead product training sessions for new clients, both online and in person, to demonstrate system features and help clinics get the most from MyDr. Support clinics with initial program configuration on their first day using the system. Maintain strong, professional relationships with medical facilities to reinforce the company's reputation. Deliver consistently high-quality training and communication during every interaction. Work closely with colleagues from m.in, as well as sales, product, and helpdesk teams. Contribute to new projects as MyDr continues to grow and innovate. Requirements Experience working with clients, especially in onboarding or product training, is highly valued. Comfort with new technologies and the ability to explain technical tools clearly to others. Strong communication skills, openness, and attention to client needs.

Teltonika Networks is looking for a Junior Backend Software Engineer to join the team in Warsaw, Masovian Voivodeship, Poland. The company develops networking equipment for industrial and enterprise use, including routers, switches, gateways, and modems. Teltonika’s technology supports clients in sectors such as Industry 4.0, Smart City, and Green Energy. For more details on their products, visit Teltonika Products. Role overview This position involves hands-on work with embedded Linux software and API frameworks for IoT devices. The team is international and values collaboration to solve technical challenges. The role is well suited to early-career engineers who want to deepen their technical skills while working on real-world projects. Main responsibilities Design, implement, and maintain embedded Linux software for IoT hardware. Develop and support an API framework used by multiple R&D teams. Analyze and integrate new technologies into existing systems. Collaborate with colleagues from different countries to address complex problems. Requirements At least 1 year of experience programming in C. Minimum 1 year working with APIs. Proficient in Shell and Python scripting. Familiarity with Git version control. Experience working with Linux-based systems. Strong English communication skills, both written and spoken. Preferred qualifications Technical degree in a relevant field. Understanding of computer networking concepts. Experience with Lua programming. Knowledge of OpenWrt. Benefits Opportunities for growth within a growing company. Work on ambitious projects focused on industrial networking devices. Private medical care (Medicover Premium) and Multisport card. Hybrid work model with flexible arrangements. Extra day off for your birthday. Team-building activities to support collaboration.

Join Tietoevry as a Junior Software Engineer specializing in C language, where you'll contribute to innovative telecommunications solutions. Be part of a dynamic team that pushes the boundaries of technology and drives growth.

Join Point72 as a Software Engineer focused on Enterprise Systems, where you will play a crucial role in developing and maintaining innovative software solutions that drive our business operations. Collaborate with cross-functional teams to design, implement, and optimize software applications that enhance the efficiency and effectiveness of our enterprise systems.

Join 42dot as an Operating System Tool Software Engineer in Warsaw, Poland. We are looking for talented engineers to help us develop state-of-the-art software tools that enhance operating system functionalities. The ideal candidate will have a passion for technology and a keen eye for detail.

Role Overview JetBrains s.r.o. creates tools that help developers work smarter. The team is looking for a Software Engineer with experience in CLion, embedded debugging, and tool integrations. This position is open in several locations: Belgrade, Berlin, Limassol, Madrid, Munich, Paphos, and Warsaw. What You Will Do Design and enhance features in CLion focused on embedded systems. Debug and optimize embedded applications for reliability and performance. Integrate different development tools to improve workflow efficiency. Work with teams across disciplines to define needs and deliver solutions. Who We’re Looking For This role suits engineers who enjoy solving complex problems and improving developer tools. Curiosity, creativity, and a strong interest in technology are valued here.

Join Our Team as a Junior Backend Engineer!We are seeking a passionate Junior Backend Engineer to be part of our innovative team in Warsaw. At Bolt, our engineering teams tackle unique challenges, including sophisticated algorithms for demand forecasting, real-time pricing optimization, route planning, fraud prevention, distributed systems, and much more.About BoltWith more than 200 million customers across over 50 countries, Bolt stands as one of the fastest-growing tech enterprises in Europe and Africa. Our success is driven by our dedicated team members.We are committed to fostering an inclusive atmosphere where everyone feels valued, irrespective of race, color, religion, gender identity, sexual orientation, nationality, age, or disability. Our ultimate vision is to transform cities for people, not cars, and we invite you to help us realize this mission!Role OverviewAs a Junior Backend Engineer, you will play a crucial role in architecting, designing, developing, and deploying our expanding backend systems. Your primary programming will involve Node.js and TypeScript (prior experience with Node.js is not required).You will work closely with key internal stakeholders to design scalable backend systems and APIs that effectively meet their requirements.

Join the Positive Side of Technology Known as ZnanyLekarz in Poland and Doctoralia in Spain, we operate globally as Docplanner.Our mission is to develop innovative technology that enhances the quality of life by connecting patients with healthcare providers, streamlining clinical workflows, and supporting healthcare systems utilized by millions every month.At Docplanner, engineering is not just about code; it’s about creating dependable and scalable systems that have a profound impact on people's lives. What we deliver matters in high-pressure situations involving patients, doctors, and clinics, which necessitates a commitment to quality, sound judgment, and strategic thinking.In 2026, we will boost our delivery capabilities across various product domains by transforming our development approach—utilizing AI-driven tools to enhance engineering efficiency and set new standards for designing, delivering, and refining our systems.Why Join Us?Because it’s rewarding to share with your loved ones how you’re contributing to a better world. You’ll rest easy knowing your work has significance and aligns with your values.We aspire to help people lead longer, healthier lives, and this begins with you being your true self. We acknowledge that embracing a diverse range of human experiences enhances healthcare for everyone. We are committed to diversity and will encourage you to bring your whole self to work. You can choose to work fully remotely or in a hybrid model from our offices in Barcelona or Warsaw, depending on team assignments.Key ChallengesAs an engineer at Docplanner, you may tackle challenges in the following areas:Marketplace & SearchDevelop the next-generation marketplace system, overseeing the complete journey from discovery to rebooking. You will harness AI-driven search and onboarding processes to unlock new user engagement and transform one-off bookings into ongoing care relationships.Practice Management Systems (PMS)Create advanced software solutions to support doctors globally. Consolidate the current fragmented landscape and utilize AI to reinvent how doctors prioritize patient care.AI-Powered Clinical Tools (Noa Medic)Design AI-enhanced clinical workflows that go beyond basic administrative tasks. You will develop deep integrations with PMS/EHR systems that become essential tools for medical professionals.

Join the LLI Academy: Now Recruiting Junior Software Developers!We are thrilled to announce the launch of the third edition of our LLI Academy, a program aimed at identifying and nurturing talented junior developers who are passionate about technology, coding, and eager to enhance their skills in a professional setting.This initiative provides aspiring developers with the chance to gain practical experience, receive mentorship, and integrate into our vibrant team.Our previous cohorts have thrived, leading to ongoing collaboration with remarkable junior developers who have transitioned into full-time roles within our company. We are now looking for the next generation of talent to join us!About LLInformaticsLLInformatics is a progressive IT consulting firm, highly regarded by clients throughout Europe and North America. We excel in delivering complex projects with precision and quality, adhering to the highest compliance standards.Our remote-first team of over 100 experts is dedicated to creating innovative digital products that yield significant results. With an emphasis on data-driven decisions and measurable outcomes, we are setting new industry standards, supported by a strong, collaborative company culture that drives our success. Location: Warsaw (on-site for the first 3 months, then the possibility of remote work) Contract Type: UZYour Responsibilities:Develop your programming skills with guidance from mentors and a structured learning path.Implement new features and functionalities into existing projects.Address programming challenges while deepening your knowledge of Ruby.Engage in regular code reviews and receive constructive feedback from seasoned developers.Maintain and enhance existing codebases through bug fixes and refactoring.Create unit, integration, and end-to-end tests to ensure software quality.Requirements:A strong desire to learn and improve coding skills.Basic knowledge of programming languages, particularly Ruby.Ability to work collaboratively in a team environment.

Are you passionate about software quality assurance and eager to kickstart your career in technology? Join us as a Junior Test Specialist / QA Engineer at Netcompany1 in Warsaw!In this role, you will be a key player in ensuring the quality and performance of our software products. You will collaborate with our development teams to identify issues and implement solutions, gaining hands-on experience in testing methodologies.

At Saily, we are revolutionizing the way people stay connected while traveling. With no roaming fees and no plastic SIM cards, we provide lightning-fast and secure mobile data across over 200 destinations. Our platform is trusted by millions of paying customers and frequented by hundreds of thousands of travelers daily.To deliver the best possible product, we have cultivated an AI-native Product Engineering culture that empowers:The Engineer as a builder, owning the customer problem-solving process from inception to production.AI Agents that assist by writing significant portions of code and automating repeatable tasks, enabling Engineers to amplify their contributions.A collaborative environment where everyone plays a role in enhancing Saily by proposing new areas for agent delegation and executing those improvements.A culture of curiosity, continuous learning, and knowledge sharing, ensuring that the customer experience, marked by comfort and connectivity, remains our primary focus.We prioritize growth over comfort, contribution over hierarchy, and impact over process. At Saily, we trust in giving talented individuals the context, autonomy, and AI tools they need to do their best work.We are excited to welcome motivated junior engineers to our team because we believe that true impact is not defined by years of experience, but rather by your eagerness to learn, discipline, and innovative mindset. Saily offers you the space to shape and enhance your surroundings.What can you expect from us? You will gain hands-on experience in AI-assisted software development, access to various learning resources, and the chance to work on a successful, impactful, and technically stimulating product that you will be proud to build.Bring your skills, your vision, and join Saily!Main ResponsibilitiesContribute to delivering tools and features with guidance from the team.Collaborate effectively with product managers, designers, and fellow engineers.Work within small, independent teams.Learn to leverage AI agents for specifications, coding, analysis, testing, and iterative processes.Participate in enhancing our internal agent network and development workflows.Focus on achieving user and business outcomes rather than just output.

Role Overview Sigma Software Group is looking for a Junior Mobile Test Engineer to help ensure the quality of mobile apps on both iOS and Android. This role is based in Warsaw and offers the chance to work directly with experienced developers while building practical skills in mobile testing. What You Will Do Design test cases for mobile applications Execute manual tests on iOS and Android platforms Identify and document defects Collaborate with the development team to resolve issues What You Bring Attention to detail and a willingness to learn Interest in mobile technology and software quality Ability to work well with others in a team setting This position offers hands-on experience and a chance to grow technical skills in a supportive environment.

Senior Software Engineer, Data Foundations ABOUT THE ROLE At Peloton, we view Data as a Product—a vital asset that drives every member interaction and influences business decisions. Our Datastores team is committed to offering a dependable, secure, and high-performing data persistence layer for application services throughout the organization. Our core principles include: 1. Safeguard the data, 2. Optimize for scalability, speed, and reliability, and 3. Minimize manual effort. We are seeking a Senior Software Engineer with extensive experience in constructing and managing data-intensive systems to join our Datastores team. This position is perfect for a backend engineer who has developed and maintained production systems heavily reliant on databases, caching layers, and data pipelines, and who is eager to advance their knowledge in scalable, cloud-native data infrastructures. You will collaborate at the intersection of application engineering and data platform reliability, working alongside service teams to enhance the storage, access, scalability, and observability of data across Peloton’s ecosystem. YOUR DAILY IMPACT AT PELOTON Your responsibilities will include: Designing, building, and maintaining backend systems that depend on scalable and highly available data persistence layers. Collaborating with service teams to refine database design, enhance query performance, and optimize data modeling. Contributing to automation efforts surrounding infrastructure provisioning using tools like Terraform and Backstage, while improving developer experience by creating self-service tools for databases and caching systems. Focusing on observability, performance insights, and autoscaling strategies for production datastores. Participating in architectural discussions regarding multi-regional data persistence and global scalability. This role merges hands-on backend engineering with significant exposure to cloud data systems and platform reliability challenges. WHAT YOU BRING We are looking for proficient backend engineers who are data-centric—those who have built systems where data performance, reliability, and modeling are crucial. 5+ years of software engineering experience in developing production backend systems. Strong familiarity with relational databases such as PostgreSQL or MySQL, including schema design, indexing, and query optimization. Experience with NoSQL datastores like DynamoDB, Redis, Elasticsearch, or Memcache. Exposure to data pipelines, event-driven architectures, and cloud technologies.

Join our dynamic team as a Middle Embedded Software Engineer at Sigma Software Group in Warsaw! We are looking for a passionate engineer who is eager to contribute to innovative projects in embedded systems development. You will work in a collaborative environment, leveraging your skills to create high-quality software solutions.

Join Box – The Future of Content ManagementBox, Inc. (NYSE:BOX) stands as the leader in Intelligent Content Management. Our innovative platform empowers organizations to enhance collaboration, manage the entire content lifecycle, secure vital documents, and transform business workflows through enterprise AI. Established in 2005, we simplify operations for renowned global organizations, including JLL, Morgan Stanley, and Nationwide. With our headquarters in Redwood City, CA, and offices worldwide, Box is at the forefront of the AI-first business era.At Box, you will play a pivotal role in advancing our platform. In a landscape where content drives daily operations across teams and departments—ranging from contracts to marketing assets—our mission is to infuse intelligence into content management, enabling customers to revolutionize workflows across their enterprises. As we harness the power of AI alongside enterprise content, we present an unmatched opportunity to reshape collaboration globally. Be a part of this significant transformation at Box!Why We Need YouThe Content Capabilities team is a newly established group with the ambitious vision of propelling the Box Content Cloud into its next wave of growth. We are dedicated to developing innovative platform capabilities that empower our product teams and customers to create unique, scalable experiences for millions of users. As we launch our first set of features, unlocking new use cases and significantly enhancing user collaboration on content, we invite a skilled Backend Software Engineer to join our team. You will have the opportunity to collaborate with a talented group of professionals, contributing to our roadmap of new capabilities and shaping the future of content management.

Join our dynamic team as a Junior Data Engineer, where you will play a critical role in enhancing modern, real-time data processing capabilities. You will assist in transitioning existing data and ML workflows from batch processing to scalable streaming solutions. This position involves hands-on engineering, close collaboration with Data Scientists, and operational oversight for production data pipelines.Technology EnvironmentUtilization of advanced real-time data streaming technologies for ML model inference.Experience with distributed data processing frameworks that enable scalable, low-latency pipelines.Work with containerized workloads orchestrated in cloud-native environments.Employ monitoring and observability tools to ensure the reliability and performance of data pipelines.Engage with a Python-based ecosystem that supports ML model integration and lifecycle management.Key ResponsibilitiesTransform batch inference workflows into efficient streaming pipelines.Establish streaming semantics to replace batch windows, including micro-batching, windowing, and state management.Design Kafka topic structures, partitioning strategies, and consumer group patterns tailored for prediction workloads.Implement strategies for checkpointing, backpressure handling, and delivery guarantees.Package and version ML model artifacts for streaming jobs to facilitate safe rollouts and rollbacks.Optimize performance for throughput and latency through effective batching strategies and resource allocation.Deploy and manage streaming jobs with comprehensive monitoring and alerting.Integrate streaming outputs into downstream ETL/BI systems seamlessly.Collaborate with Data Scientists on CI/CD for streaming models while monitoring model performance and drift.Team & CollaborationEngage in a distributed delivery model closely coordinated with the central AI/BI team in Germany.Experience daily collaboration through MS Teams, Jira, and Confluence.Utilize Agile methodologies (Scrum/Kanban) within cross-functional squads.

Project OverviewJoin our newly established team focused on OpenStack technologies as a pivotal member. Collaborate with an OpenStack Architect and a Principal Engineer to create and maintain robust private cloud platforms for our international clientele. This is an exceptional chance to influence the operational standards of a new unit, working with large-scale production environments while ensuring their stability, scalability, and security. Your ContributionDeploy, develop, and maintain OpenStack production environments.Execute platform upgrades and manage lifecycle operations using industry-standard methodologies.Automate infrastructure provisioning and configuration with Infrastructure as Code (IaC) tools.Troubleshoot complex issues across the OS and cloud platform layers.Design and maintain monitoring solutions to ensure system observability.Utilize scripting and coding to automate routine tasks and enhance system efficiency.Collaborate with the team to implement best practices for the new OpenStack division. 

Join Securitas as a Technical Security Systems Implementation Expert and be at the forefront of enhancing safety and security solutions. This role is ideal for individuals passionate about technology and security systems, eager to contribute to a safer environment.