Principal Software Engineer (Ruby Specialist)

Fraud Alert: We advise applicants to only submit applications through the official Sensor Tower website or designated job postings on trustworthy platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account details during the job application process. All communications will originate from email addresses ending with sensortower.com. Interviews will be conducted via phone or Zoom, and we will not use alternative email addresses or text messaging for communication. Please report any suspicious activity that does not align with these guidelines. Kindly include your resume when applying.Attention Recruitment Agencies: Sensor Tower does not accept unsolicited resumes. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not be liable for any fees associated with unsolicited submissions.About the Role:As a Back End Engineer at Sensor Tower, you will play a crucial role in scaling our database operations while managing extensive data volumes (in the tens of terabytes). We seek engineers who can creatively gather and analyze meaningful data insights.In our flat organizational structure, your contributions will significantly influence the development of products and features that support our users effectively.A Day in the Life:Interviewee: Engineering Team Lead - Sasha YelkovenkaWhat does your daily routine involve as a Software Engineer?I handle vast amounts of data, which continues to grow. My main responsibility is ensuring our customers can access this data swiftly and providing them with user-friendly tools for data consumption. I appreciate the ownership culture we have regarding our work and products.How do you collaborate with your team as a remote employee?At Sensor Tower, we foster a strong sense of community within our distributed team. We frequently collaborate over Zoom to combine our expertise and achieve outstanding results.

Fraud Alert:Please be aware that there are fraudulent job postings that may appear legitimate on other platforms. To ensure your application is considered, apply exclusively through our official Sensor Tower website or through posts linked to the Sensor Tower company profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. At no time will Sensor Tower request any payment, credit card, or bank account information to complete your job application. All communication from Sensor Tower will be via email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and we will not switch to alternative email or text messaging. If you encounter any issues, please reach out to us directly. Include your resume when applying.To Recruitment Agencies:Sensor Tower does not accept unsolicited third-party resumes. Please refrain from sending resumes to our job alias, Sensor Tower employees, or any other locations. We will not be responsible for any fees associated with unsolicited resumes, and we will not pay any third-party agency or company without a signed agreement.About the Role:Are you passionate about developing products that handle large-scale real-world data?At Sensor Tower, we process vast amounts of data to provide insights utilized by thousands of customers. We are in search of inquisitive, driven early-career engineers eager to enhance their skills while assisting us in creating swift, reliable systems that simplify data accessibility and comprehension.You will collaborate closely with seasoned engineers, contribute meaningfully from your first day, and gain insights into the design, construction, and optimization of large-scale systems in a production environment.If you thrive on learning, tackling challenges, and delivering software that users depend on, we would love to connect with you. We have a strong history of rapidly advancing talented juniors, and this role presents a unique opportunity to work closely with senior leadership.Our Engineering Culture:We uphold the belief that "Simplicity is a prerequisite for reliability." We seek engineers who resonate with our core values:- Simplicity: We prioritize straightforward solutions over complex ones and avoid unnecessary complications.- Quality: We produce code that is enjoyable to read, understanding that code is often read more frequently than it is written. We strive for high standards and avoid cutting corners.

Join Moss, where we empower finance professionals to automate their daily tasks and make innovative decisions.Our culture is what sets us apart — we prioritize impact and continuous growth, encouraging each team member to learn and excel. Moss has been recognized by Sifted’s Rising 100 and LinkedIn's Top Startups, and we are committed to driving your career forward while building a lasting success story together.We are currently seeking a Senior Frontend Engineer (f/m/d) to join one of our diverse tribes in Warsaw. The tribes currently hiring include:Financial ServicesGrowthSpend ManagementYou will work closely with product, design, and backend engineers to provide seamless and scalable solutions.

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.

Join Saily, where we are transforming the travel experience by eliminating the hassle of staying connected while on the go. Our service offers lightning-fast, secure mobile data across 200+ destinations, without the burden of roaming fees or plastic SIM cards. With millions of satisfied customers and countless travelers engaging with our service, we are on a mission to redefine connectivity.At Saily, we cultivate an AI-native Product Engineering culture, which empowers our engineers to take full ownership of product development from conception to deployment. Our AI Agents handle repetitive tasks and assist engineers in maximizing their productivity. We believe in the collective effort to enhance our service by continuously identifying areas for improvement and implementing innovative solutions.We prioritize curiosity, learning, and collaboration while keeping our customers' comfort and connectivity as our core focus. At Saily, we value growth over comfort, contribution over hierarchy, and impact over process, providing our talented team with the autonomy and context necessary to excel.

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 Nordsec as a Mid-Senior Site Reliability Engineer in Warsaw, where you'll play a pivotal role in ensuring the reliability and performance of our systems. You will collaborate with cross-functional teams to enhance our infrastructure and optimize our deployment processes.In this role, you will be responsible for designing and implementing robust systems, automating processes, and monitoring our production environments.

Join our dynamic team at Nordsec as a Mid-Senior iOS Engineer in the vibrant city of Warsaw! We are looking for a talented and passionate individual to contribute to the development of innovative iOS applications. You will play a crucial role in enhancing user experiences by implementing the latest technologies and best practices in mobile development.

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 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!

Role overview Nord Security seeks a Mid-Senior Copy Editor based in Warsaw. This position centers on shaping and polishing written content for readers worldwide. The editor reviews materials to confirm they meet Nord Security’s standards for quality, clarity, and brand voice. What you will do Edit and refine content to keep it clear, accurate, and consistent with the brand Uphold high standards across all written materials Help support effective communication on a variety of platforms

Join Us in Revolutionizing Password Security!At NordPass, we are dedicated to making password security seamless and straightforward. Our mission is to ensure that managing logins is both safe and easy. Be a part of the innovative team that powers NordPass—a trusted password manager used by over 7 million individuals and more than 10,000 companies worldwide to protect their sensitive information, including credentials and payment details.Your Role: As an Android Developer, you will play a pivotal role in enhancing our applications, enabling millions to secure their digital identities. You will contribute to developing intelligent and secure login solutions that empower users globally.

Become a pivotal part of our talented Web Design team, where you will contribute to redefining the online presence of a leading global cybersecurity provider.We are seeking a skilled designer eager to enhance our web presence, driving user engagement and satisfaction. Your primary focus will be on creating visually appealing and user-friendly websites. You will work closely with our Marketing team on diverse projects, from global campaigns to new business initiatives. As a designer, you will also collaborate with copywriters, web content managers, design system specialists, graphic designers, and engineers to deliver exceptional websites that captivate audiences worldwide.Main ResponsibilitiesDesign web pages that promote user engagement and interaction, ensuring a seamless browsing experience.Evaluate existing website patterns and structures, identifying design and architectural flaws to recommend effective solutions and enhancements.Partner with marketing and product teams to ensure that web designs align with our brand identity and business goals, enhancing user engagement and conversion rates through comprehensive, user-centric strategies.Collaborate closely with UI/UX Designers, UX Researchers, and Design System designers.Champion design excellence by presenting and justifying your design decisions and their potential impact on growth metrics to stakeholders.Core RequirementsDemonstrated experience in web design, backed by a portfolio showcasing your ability to create engaging web pages.Outstanding visual and interaction design skills, with a strong attention to detail and a passion for crafting intuitive user experiences.A commitment to aligning design strategies with business objectives and user requirements.A collaborative mindset, capable of working with data analysts, web content managers, and developers to ensure the integrity of design and its implementation.A quick learner, adaptable to emerging technologies and changing project demands, receptive to feedback for continuous improvement.Excellent communication skills, with fluency in English.Proficiency in Figma.

Become a key player in our dynamic Web Marketing Design Team at Nordsec, where your creativity will shape the digital landscape of premier cybersecurity solutions worldwide. We are on the lookout for a talented web designer eager to contribute to an engaging online presence that drives user acquisition and enhances customer satisfaction. Your primary focus will be on designing visually compelling and user-friendly websites. Collaborate closely with our marketing team on various initiatives, from global campaigns to innovative business projects. As part of your role, you will also work hand-in-hand with copywriters, web content managers, graphic designers, and engineers to deliver exceptional websites that resonate with our audience.

Join altersolutions as a Mid/Senior Angular Developer in Warsaw, where you will have the opportunity to work on innovative projects and enhance your skills in a collaborative environment. You will be responsible for developing dynamic web applications using Angular, collaborating with cross-functional teams to design and implement user-friendly interfaces.

Join altersolutions as a Mid/Senior Java Developer and take part in exciting projects that shape the future of technology. In this role, you will leverage your expertise in Java development to create innovative solutions and enhance existing systems. You will collaborate with cross-functional teams to deliver high-quality software in a dynamic, fast-paced environment.