Mid-Level Backend Engineer at Moss | Warsaw

Join NordPass and revolutionize password security.At NordPass, we are committed to making logins safer and more straightforward for everyone. As a member of our dedicated team, you will contribute to developing a password manager that is trusted by over 7 million users and more than 10,000 organizations worldwide to protect their credentials, payment information, and sensitive data.Your Role: Play a vital role in helping millions secure their digital identities by designing smarter, safer login solutions.

Join the NordPass Team to Revolutionize Password Security!At NordPass, we strive to make online password management effortless and secure. With over 7 million users and 10,000+ companies relying on us, we are committed to providing a premium password manager that safeguards credentials, cards, and sensitive information.Your Contribution: Play a pivotal role in enhancing digital security for millions by developing innovative and secure login solutions.Key ResponsibilitiesCollaborate with cross-functional teams to integrate and optimize microservices across NordSecurity's product ecosystem, ensuring a seamless user experience.Prioritize the delivery of high-quality, scalable, and secure code.Engage in key technical and architectural decisions, refining development processes and shaping the strategic direction of our products.Demonstrate strong ownership over product development, maintenance, and quality assurance.Facilitate effective communication and collaboration among engineering, product, and design teams.Essential QualificationsExtensive experience with PHP (3+ years).Hands-on experience with AI tools to enhance engineering (e.g., code generation, test creation, performance optimization, and debugging), demonstrating accountability for outcomes.Proficient in system design, with a clear understanding of design patterns and their applications.Solid grasp of Object-Oriented Programming (OOP), asynchronous programming, and design patterns.A genuine passion for architecture and technology; we want to hear from those who can create scalable and robust code.Familiarity with core CI/CD principles, unit testing, and integration testing.Preferred QualificationsKnowledge of cryptography.

At NordPass, we are dedicated to making password security effortless.We believe that logins should be both safer and simpler. Join the innovative team behind NordPass— a leading password manager relied upon by over 7 million users and more than 10,000 global enterprises to protect their credentials, cards, and sensitive information.Your impact? You will be instrumental in helping millions secure their digital lives by developing smarter and safer login solutions.Main ResponsibilitiesDesign, develop, and take ownership of security-focused backend services (including breach detection, email masking, and related tools) with a commitment to high quality, performance, and accuracy.Utilize AI-assisted workflows on a daily basis (code generation, test scaffolding, debugging, performance optimization) while continuously evaluating new tools to enhance the team's productivity.Contribute to the establishment of shared AI practices within the squad: reviewing patterns, creating prompt libraries, and setting guardrails to ensure AI-generated code meets the same standards as hand-written code.Engage in system design and architectural decision-making, advocating for solutions that are secure, scalable, and maintainable.Collaborate across functions with Frontend, Android, iOS, and Backend engineers to deliver comprehensive features across all platforms.Assume full responsibility for your creations, from design to production, ensuring uptime, reliability, and code excellence.

Join our dynamic team at Nordsec as a Mid-Level Backend Engineer, specializing in developing robust security tools. In this role, you will design, implement, and maintain backend services that safeguard our digital assets and enhance user experiences.Your responsibilities will include collaborating with cross-functional teams, ensuring optimal system performance, and contributing to the architecture of our security infrastructure. We are looking for innovative thinkers who are passionate about coding and eager to tackle challenging problems.

Oxylabs, headquartered in Warsaw, develops proxy and web data scraping solutions for a diverse client base, including Fortune 500 companies. The company’s team of over 500 professionals tackles large-scale technical challenges together. Role overview This remote mid-level PHP developer position centers on managing and enhancing the infrastructure behind Oxylabs’ data platforms. The systems you will help support are built to handle vast amounts of data and high-volume traffic. Key infrastructure details Ceph storage exceeding 6 petabytes Monthly data traffic of more than 60 petabytes Over 300,000 service requests each second Streaming upwards of 500,000 Kafka messages per second What you will do The work focuses on solving complex technical problems and strengthening the core systems that power Oxylabs’ data-driven products. Expect to contribute directly to the reliability and scalability of this infrastructure.

Role overview Talan is seeking a Mid-Level Backend Spark Developer to join the team in Warsaw. This role centers on building and maintaining backend systems, with Apache Spark as a primary tool. The work directly supports ongoing projects and plays a key part in meeting team objectives. What you will do Develop backend solutions that use Spark as a central technology Collaborate with colleagues from various disciplines to deliver dependable software Support project progress by helping meet milestones and upholding technical standards Location This position is based in Warsaw.

Teltonika Networks is seeking a Mid Backend Engineer in Warsaw, Masovian Voivodeship, Poland. The team develops backend software for networking solutions that power Industry 4.0, Smart City initiatives, and Green Energy projects. Teltonika designs and manufactures connectivity equipment for industrial and enterprise use, including routers, switches, gateways, and modems. Product details are available at https://www.teltonika-networks.com/products. Role overview This position centers on backend development for embedded Linux software used in IoT devices. The Mid Backend Engineer will contribute to API frameworks and help bring new technologies into established systems. Collaboration with R&D teams is a regular part of the role, especially when solving technical challenges. Main responsibilities Design and implement embedded Linux software for IoT hardware Develop and maintain proprietary API frameworks for R&D use Analyze and integrate new technologies into current systems Work with colleagues to resolve complex technical issues Requirements At least 2 years of experience programming in C Minimum 2 years working with APIs Proficiency in Shell and Python scripting for automation Solid understanding of Git version control Experience with Linux-based operating systems Strong written and spoken English Preferred qualifications Technical degree in a relevant field Background working with IoT devices Understanding of computer networking principles Knowledge of cybersecurity practices Experience with Lua programming Familiarity with OpenWrt Benefits Opportunities for career growth within a growing company Challenging projects in industrial networking Private medical care (Medicover Premium) and Multisport card Flexible hybrid work, coordinated in advance with your manager Extra day off for your birthday Team-building events and activities

Join Our Team at NordLayer!At NordLayer, we are on a mission to deliver scalable cybersecurity solutions tailored for modern businesses.Our innovative platform empowers teams to operate efficiently without the burden of security concerns. Trusted by over 11,000 global companies, NordLayer seamlessly integrates with any technology stack to safeguard users across borders.Your Role: As a DevOps Engineer, you will play a crucial role in enhancing and automating our infrastructure and CI/CD processes. Collaborating with Senior Engineers and cross-functional teams, you will implement best practices in DevOps, support robust and scalable cloud solutions, and ensure smooth software delivery. This is a fantastic opportunity for professional growth in a dynamic environment while contributing to our infrastructure automation initiatives.Key Responsibilities:Implement and maintain Infrastructure as Code (IaC) using Terraform.Develop, manage, and optimize Terraform modules.Oversee and enhance AWS Cloud infrastructure, ensuring performance, scalability, and availability.Assist in establishing and maintaining monitoring and logging systems (e.g., ELK, Grafana, Thruk).Provide technical support for infrastructure, CI/CD pipelines, and deployment processes.Troubleshoot and resolve infrastructure-related issues to ensure seamless operations.Document and uphold DevOps workflows, processes, and system configurations.

Join Box Inc. as a Mid-Level Java Engineer and take part in building innovative solutions that streamline processes and enhance user experiences. You will collaborate with a team of talented developers, contributing to the design, development, and maintenance of high-quality software applications.We value creativity, teamwork, and a passion for technology. If you are eager to tackle challenging problems and develop your skills in a supportive environment, we would love to hear from you!

Join our team as a Backend Engineer and contribute to our innovative solutions at NordProtect. We are looking for talented individuals with a passion for technology and a strong background in backend development, specifically using Go. In this role, you will collaborate with cross-functional teams to design, implement, and maintain robust and scalable backend systems.

Join our dynamic team at Nord Checkout as a Backend Engineer, where you will play a vital role in developing and optimizing our backend systems using Go. This position is perfect for individuals who are passionate about backend development and are eager to contribute to innovative payment solutions.

Join the forefront of digital privacy with the world’s leading VPN!Are you a passionate problem-solver who thrives on innovation? Become a vital member of the team that developed Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—empowering users with enhanced privacy, security, and control over their online presence.Your contribution? Enable millions of users to regain control of their online security, privacy, and data.The Low-Level Server Side Team is at the helm of delivering VPN server software that serves millions of users worldwide.

The project involves enhancing the architecture of a system that supports clients in branches and partner locations.RESPONSIBILITIES:Participate in architectural changes to the system.Implement new functionalities using Angular 19 and Java 21.Refactor existing code for improved performance.Create integrations with REST services.Optimize performance and implement security solutions.Assist in designing and documenting technical specifications.

Join Talan as a Mid-Level Business Analyst, where you will play a crucial role in bridging the gap between business needs and technology solutions. We are looking for a detail-oriented professional who can analyze business processes, identify areas for improvement, and collaborate with stakeholders to implement effective strategies.

Role overview Box Inc. seeks a Mid-Level Python Developer based in Warsaw, Poland. The role focuses on building web applications that are both efficient and scalable. Work alongside a team of experienced developers, contributing directly through hands-on coding and participating in peer code reviews. Writing clean, maintainable Python code is central to this position. What you will do Develop and maintain web applications using Python Write code that remains clear, organized, and easy to support Participate in code reviews to help maintain quality standards Collaborate with teammates to address technical challenges Requirements Enjoys working through complex problems Proactive and willing to learn Comfortable contributing in a collaborative environment

Join NordPass, where we revolutionize password security.At NordPass, we believe that securing logins should be both safe and straightforward. Become a part of the dynamic team behind NordPass—a trusted password manager for over 7 million users and more than 10,000 global businesses, dedicated to safeguarding credentials, payment cards, and sensitive information.Your Contribution: Play a pivotal role in helping millions protect their digital lives by developing innovative and secure login solutions.

Join our innovative team at nordsec as a DevOps Engineer. In this exciting role, you will collaborate with cross-functional teams to streamline our software development and deployment processes. Your expertise will ensure the reliability and efficiency of our systems while enabling our team to deliver top-notch software solutions.If you have a passion for automation, cloud services, and continuous integration/continuous deployment (CI/CD) practices, we want to hear from you. Bring your skills in infrastructure management and help us scale our operations!

Join NordProtect and be a part of a pioneering identity theft protection service.As a key member of the Nord Security team, you will contribute to the development of an innovative platform that integrates dark web monitoring, credit tracking, and identity theft insurance into a single, powerful solution.Your contributions will be vital! You will empower individuals to safeguard their identities, identify threats proactively, and enhance their recovery capabilities.Welcome to NordProtect, your comprehensive shield against identity theft, financial fraud, and online scams. We deliver extensive monitoring, prompt threat detection, fast recovery, and dependable insurance, offering unmatched security and peace of mind for both individuals and businesses. The real champions of this advanced solution are cybersecurity and insurance professionals, and we invite you to join us in this mission to protect digital identities.Key ResponsibilitiesDesign and create microservices tailored to the daily needs of users requiring identity theft protection, ensuring the utmost security while managing a significant volume of personal identifiable information.Collaborate with cross-functional teams to guarantee the smooth integration and functionality of microservices throughout Nord Security's product suite, ensuring a cohesive and seamless user experience.Provide mentorship and technical direction to team members, fostering the growth of best practices within the engineering team.Play a crucial role in shaping the team's vision and contributing towards long-term objectives.Participate in research and development efforts to discover and implement advanced technologies as needed.Encourage effective communication and collaboration among team members and with other engineering, product, and design professionals across various teams.Demonstrate a collaborative mindset by actively engaging in discussions, challenging ideas, and embracing redesigns that contribute to collective success.Core QualificationsProven experience with backend technologies, particularly with Go.Strong understanding of system design principles, including knowledge of appropriate design patterns and their application.Familiarity with Agile methodologies and continuous integration practices.Ability to communicate technical concepts effectively to varied audiences.Experience in building scalable and resilient systems.

Fraud Warning: Beware of potential scams posing as legitimate job opportunities. To ensure your application is considered, please apply only through the official Sensor Tower website or directly through our authorized profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account information during the application process. All official communications will originate from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and no conversations will shift to external email or text platforms. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Recruitment Agencies: Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not cover fees related to unsolicited resumes and will not compensate agencies without a signed agreement.About This Role:Are you excited by the dynamic environment of a startup?Do you have a passion for developing high-impact, rapidly deployed products?Are you committed to mentoring emerging engineers and championing technical excellence?Join us in revolutionizing how insights are derived in digital marketing!Apply today!Role Summary:As a Mid / Senior Frontend Engineer at Sensor Tower, you will play a crucial role in developing top-notch products and features that enhance our user experience. Our flat organizational structure allows for your input to significantly influence product design and development.