Senior Backend Engineer | Go | Join Our Notification Center Team

Join Saily, where we simplify staying connected while traveling — no roaming fees, no plastic SIM cards, just high-speed, secure mobile data accessible in over 200 destinations. With millions of satisfied customers and countless travelers using Saily at any time, we are dedicated to enhancing their experience.At Saily, we cultivate an AI-driven Product Engineering culture that empowers our engineers to:Own the product development lifecycle from concept to deployment.Leverage AI Agents to automate repetitive coding tasks, maximizing their productivity.Continuously identify and implement improvements within our processes.Embrace curiosity and encourage knowledge sharing.Focus on delivering a seamless, connected experience for our customers.We prioritize growth, contribution, and impactful work over comfort and hierarchy. At Saily, we provide our talented team members with the autonomy and resources they need to excel.Key ResponsibilitiesEnhance our product by developing and maintaining innovative features.Create functionalities that support multi-dimensional personalization, A/B testing, and data analytics.Maintain a robust and high-quality codebase.Continuously seek opportunities to improve code quality and system performance.Provide mentorship on development best practices and offer technical guidance to peers.Contribute to the overall vision and long-term goals of the team.Conduct research and development as needed.Collaborate within a cross-functional team to ensure clear communication among all members.Work alongside engineering, product, and design experts from other teams.Note: This position requires in-office attendance three times a week.

Join the forefront of online security technology with the world’s leading VPN provider!Are you a passionate problem-solver eager to make impactful contributions? Become a key player in the team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—tools designed to restore privacy, security, and user control.Your role? Empower millions to reclaim their online security, privacy, and data integrity.As a Senior Backend Engineer on our Notification Center Team, you’ll be vital in designing and maintaining the microservices that facilitate seamless in-app notification delivery. We take pride in being the backbone of numerous features that depend on these notifications for smooth functionality. Our collaborative spirit drives us to work closely with other teams at Nord to pave the way for a scalable future.Ready to tackle the challenges of scalability, code quality, and service stability? Join our team of skilled engineers dedicated to technical excellence and help shape the future of NordVPN and its associated products!

Join Saily, where we are revolutionizing mobile connectivity while you travel with our service that eliminates roaming fees and the need for plastic SIM cards, providing seamless, secure mobile data in over 200 destinations worldwide. With millions of customers and countless travelers engaged with Saily at any time, we are committed to delivering the best mobile experience.Our AI-native Product Engineering culture is designed for innovation:The Engineer takes ownership, managing projects from concept through to production.AI Agents support engineers by handling coding and repetitive tasks, enhancing productivity.Every team member is encouraged to suggest improvements, fostering a culture of constant enhancement.We prioritize curiosity, learning, and sharing knowledge.The comfort and connectivity of our customers is always our primary focus.At Saily, we emphasize growth over comfort, contribution over hierarchy, and impact over process, providing our talented team with the autonomy and AI tools necessary to excel in their roles.

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.

Job Overview Join Our Team We are seeking an experienced Senior Backend Engineer (Go) to join Inflect as a contractor within our Engineering team in Poland. This role offers you the opportunity to take significant technical ownership of essential backend services in a hands-on, execution-driven capacity. If you have a passion for building, scaling, and enhancing production systems that drive business success, we'd love to hear from you! This position is ideal for a senior engineer at either a senior or early staff level, showcasing strong technical ownership and a high degree of autonomy. As part of our tight-knit, senior engineering team, you will enjoy substantial ownership and autonomy, making a direct impact on our product. You will have a concrete influence over backend architecture, technical direction, and tooling decisions while maintaining alignment with product and business objectives. This position does not include people management responsibilities or legacy system ownership; it is solely focused on developing, scaling, and enhancing modern backend services. About Inflect Inflect is at the forefront of building and operating an innovative IT infrastructure marketplace, seamlessly connecting buyers and service providers through a single, product-driven platform. We are not just a software house or agency. We navigate complex marketplace workflows at the intersection of cloud infrastructure, network services, and large-scale computing (CPU/GPU). Our marketplace integrates directly with service providers, allowing buyers to discover, compare, and transact infrastructure services effortlessly. Our engineering culture prioritizes pragmatism, ownership, and rapid feedback, focusing on delivering tangible business value rather than adhering to rigid processes or excessive formalities. Work Environment Standard working hours align with the Polish (CET) time zone, with regular collaboration with engineers and stakeholders based in the United States. We prefer a hybrid work model, with 1–2 days in our Warsaw office each week. Daily communication in English with US-based engineers and partners. Close collaboration with Product, Backend, and Infrastructure-focused teammates. Your Responsibilities Assume technical ownership of critical backend services that power Inflect’s marketplace and service provider integrations. Design, implement, and scale backend systems that support the onboarding and integration of new service provider groups. Collaborate closely with Product and Engineering leadership to translate marketplace and integration requirements into practical, production-ready technical solutions. Engage in ongoing evaluation and improvement of backend systems to enhance performance and reliability.

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.

Saily, part of nordsec, helps travelers connect worldwide without roaming fees or plastic SIM cards. The service delivers fast, secure mobile data in more than 200 locations and supports millions of paying users, including hundreds of thousands of travelers at any given time. The team values an AI-native product engineering approach. Engineers at Saily take responsibility for the full product lifecycle, from early ideas through deployment. AI agents handle repetitive work, freeing engineers to focus on solving customer problems and building new features. How the team works Engineers design and deliver solutions to real customer challenges, owning projects from start to finish. AI tools automate routine tasks, letting the team work more effectively. Everyone can suggest and implement improvements to the platform. Continuous learning, curiosity, and sharing knowledge are core values. The main goal is to provide travelers with a smooth, reliable connection wherever they go. Culture and values Growth is valued over comfort. Contribution matters more than hierarchy. Impact takes priority over rigid processes. Team members receive the context, autonomy, and AI tools needed to excel.

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.

Are you an experienced Android Engineer with a passion for Kotlin? Join the innovative team at Saily, where we are dedicated to creating cutting-edge applications that enhance user experiences. As a Senior Android Engineer, you will play a crucial role in designing, developing, and maintaining high-quality mobile applications. Collaborate with cross-functional teams, contribute to architectural decisions, and mentor junior developers in a dynamic and supportive environment.

Join the forefront of online privacy and security.At Nord Security, we are pioneers in developing cutting-edge tools like Threat Protection Pro and the NordLynx protocol, ensuring users regain control over their online security and privacy.Your Role: As part of the Nord Checkout team, you will contribute to building and maintaining essential services that enhance the user purchasing experience. Your work will ensure a secure, efficient, and enjoyable process for millions of users worldwide.Main Responsibilities:Design and implement highly scalable, resilient, and secure microservices.Write high-quality, tested, and maintainable code that performs well under load.Collaborate with cross-functional teams, including QA, DevOps, and security, to ensure seamless service delivery.Successfully deploy new features and technical fixes on schedule.Create comprehensive technical designs and maintain thorough documentation.Conduct research and development to solve complex challenges.Take ownership of projects from inception to completion.Embrace continuous professional 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 the forefront of digital security with the world's most advanced VPN.Are you a curious problem-solver eager to make a difference? Become part of the team that powers Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—innovative tools designed to restore privacy, security, and control to users everywhere.Your impact? Empower millions of users to reclaim their online security, privacy, and data.About Threat ProtectionIn an age of viruses, Trojans, worms, spyware, and other malware, ensuring online safety can be challenging. Our Threat Protection team is dedicated to solving these issues by developing robust software that safeguards our customers. You'll create scalable code capable of handling high volumes, security concerns, and complex architectures, all built from the ground up. If this sounds like the challenge you’ve been seeking, read on!Main ResponsibilitiesDesign and develop distributed microservices that shield millions from malware threats;Prioritize delivering high-quality code with a focus on scalability and security;Collaborate with a passionate team of developers to build and maintain our services using Golang;Take ownership of architecture, design, development, and deployment initiatives with respect and commitment.Core RequirementsExperience with distributed technologies and familiarity with NoSQL databases, particularly Cassandra or Kafka;Strong grasp of system design, with knowledge of applicable patterns;Passion for creating anti-virus solutions and enhancing online safety where your contributions will have a direct impact;Adept in backend architecture and technologies, willing to engage in discussions and share ideas; if you can deliver scalable and stable code, we want to connect with you;A collaborative spirit with a love for discussing, rethinking, and redesigning ideas that foster shared success within your team and the company.

Join Saily, where we simplify global connectivity without the burden of roaming fees or cumbersome SIM cards. With access to rapid, secure mobile data across 200+ destinations, we cater to millions of satisfied customers and hundreds of thousands of travelers exploring our services at any moment.Our commitment to developing outstanding products is driven by an AI-native Product Engineering culture that emphasizes:The engineer as a builder, taking ownership of the project lifecycle from conception through to production.AI agents that assist by automating repetitive tasks, enabling engineers to focus on impactful work.A collaborative environment where team members actively propose enhancements to improve efficiency.A culture of curiosity, knowledge-sharing, and continuous learning.Maintaining our customer focus, ensuring seamless and enjoyable journeys.At Saily, we prioritize growth over complacency, contribution over hierarchy, and meaningful impact over rigid processes. We empower talented individuals with the autonomy and context needed to perform their best work.

Are you a talented Mobile Engineer skilled in iOS and Android development? Join our dynamic team at Saily, a leading tech company, where you will play a key role in shaping our mobile applications. We are looking for a passionate and innovative Senior Mobile Engineer to contribute to our exciting projects and help us deliver top-notch mobile solutions.Your expertise in mobile technologies will be crucial as you collaborate with cross-functional teams to design, develop, and maintain high-quality mobile applications. If you are eager to make a significant impact and thrive in a fast-paced environment, we want to hear from you!

Join Saily, where we revolutionize connectivity for travelers by eliminating roaming fees and plastic SIM cards, offering seamless, high-speed mobile data in over 200 destinations. With millions of satisfied customers and countless travelers engaging with Saily at any moment, our mission is clear.We cultivate an AI-native Product Engineering culture that empowers our engineers to be builders, taking ownership of customer challenges from concept to deployment. AI agents assist in coding and automating repetitive tasks, enhancing engineers' productivity. We believe in constant improvement, where every team member is encouraged to propose enhancements and implement innovative solutions.Curiosity and knowledge sharing are vital to us, ensuring that our primary focus remains on delivering a comfortable, connected, and hassle-free experience for our customers.At Saily, we prioritize growth over comfort, contributions over hierarchy, and impact over process. We empower talented individuals with the context, autonomy, and AI tools necessary to excel in their roles.

Join Saily, where we revolutionize connectivity for travelers. Say goodbye to roaming fees and plastic SIM cards. We offer lightning-fast, secure mobile data in over 200 destinations worldwide. With millions of paying customers and countless travelers using Saily at any moment, our mission is to enhance the travel experience.At Saily, we cultivate an AI-native Product Engineering culture that emphasizes:Engineers as builders responsible for end-to-end solutions, from concept to production.AI agents that empower engineers by automating repetitive tasks, allowing them to focus on impactful work.A collaborative environment where everyone is encouraged to suggest and implement improvements.A culture of curiosity, continuous learning, and knowledge sharing.Prioritizing customer satisfaction and ensuring a seamless journey for our users.We believe in prioritizing growth over comfort, contribution over hierarchy, and impact over process. At Saily, we empower talented individuals with the context, autonomy, and AI tools necessary to excel in their roles.Key Responsibilities:Design and implement robust test automation frameworks across multiple platforms, developing automated tests for complex functional integration, regression, and performance evaluations to ensure compliance with acceptance criteria.Contribute to the formulation and execution of testing strategies.Engage in the development of comprehensive test plans and test cases.Identify and document software defects, collaborating with the development team to resolve issues.Conduct hands-on exploratory and manual testing to identify edge cases and usability concerns that automated tests might overlook.Validate intricate user flows end-to-end across mobile and other platforms prior to major releases.AI Integration & Advocacy:Proactively explore and incorporate AI-driven tools into QA workflows to enhance test creation, broaden coverage, and minimize cycle times.Promote the adoption of AI-assisted testing methodologies throughout the engineering organization.Experiment with large language models (LLMs) and AI assistants to generate test data, develop test cases from requirements, and manage flaky tests.

Join Saily, where we simplify secure mobile data plans for travelers.Experience travel without the burden of roaming fees or plastic SIM cards. Enjoy fast and secure mobile data in over 200 countries with the team behind Lonely Planet's leading eSIM, powered by NordVPN.Your contribution? Ensuring that people remain securely connected, wherever their adventures take them.

At Saily, we are revolutionizing the way travelers stay connected—eliminating roaming fees and plastic SIM cards in favor of secure, high-speed mobile data across 200+ destinations worldwide. With millions of paying customers and hundreds of thousands actively engaged at any time, our mission is to enhance the travel experience.To deliver the best products, we cultivate an AI-native Product Engineering culture that empowers our engineers to:Take complete ownership of projects—from initial concept to productionDevelop features without the necessity for exhaustive specificationsCollaborate closely with product managers, designers, data specialists, and fellow engineersWork in small, autonomous teams that prioritize innovationLeverage AI agents for specification, coding, analysis, testing, and iterationAchieve double the output compared to a traditional Senior EngineerEnhance our internal agent network and development processesNavigate across the technology stack as requiredPrioritize user and business outcomes over mere outputCore RequirementsDemonstrated experience in designing, building, and deploying AI-native tools or applications with successful measurable outcomesProficient in developing full-stack features for mobile or web applications (frontend and backend)Strong problem-solving skills and a passion for innovation

Join Groupon, a dynamic marketplace where customers uncover fresh experiences and services daily while empowering local businesses to thrive. With over a million merchant partners globally, we connect more than 16 million customers to exceptional deals across diverse categories. In a landscape often dominated by e-commerce giants, Groupon distinguishes itself as a platform uniquely dedicated to fostering the success of local businesses on a performance basis.We are on an ambitious journey to revolutionize our business through an unwavering commitment to results. Despite our expansive global team, we cultivate a culture that ignites innovation, embraces risk-taking, and celebrates achievements. Here, your impact can be immediate, thanks to our scale and the speed of our transformation. We embody the best of both worlds: large enough to offer resources and scale, yet small enough for individual contributions to make a significant difference.About the RoleAs a Senior Go-To-Market Engineer at Groupon, you will be the architect behind our revenue engine—designing and building automated systems that facilitate the discovery, enrichment, qualification, and engagement of merchants across international markets. This high-impact, individual contributor role will see you delivering work that directly influences pipeline and revenue. You’ll work collaboratively across Sales, Marketing, and Data teams while maintaining deep ownership of Groupon's Go-To-Market technical infrastructure. Your contributions will enable our teams to operate efficiently at scale across multiple markets, ensuring operational effectiveness and data integrity.ResponsibilitiesSystem Design and AutomationDesign, develop, and optimize robust automated workflows within the Go-To-Market tech stack utilizing Clay, Kubaru, Cloudingo, and Salesforce.Create scalable agentic workflows in Clay to assess and enrich business and contact data efficiently.Establish integrations linking Clay, Salesforce, internal merchant assessment tools, and marketing automation platforms.Lead Management and Data OperationsDevelop real-time lead scoring engines to prioritize high-value opportunities.Design and maintain dynamic lead routing systems to maximize conversion potential.