Mid-Senior iOS Engineer at Saily | Warsaw

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 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 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.

About The Dot CollectiveWe are a forward-thinking consultancy operating across the UK and EU, driven by engineering excellence and a commitment to empowering individuals to create meaningful impact.We utilize cutting-edge technology stacks and adhere to agile scrum methodologies for all our projects.About YouAre you driven by data and its ability to transform? Do you seek to make a significant impact in a short timeframe? If so, you might be the perfect fit for us.Your Key Skills and Capabilities:In-depth understanding of the Networking stack and its application within Cloud EnvironmentsProficient in minimizing toil through re-architecting or developing Python toolsCollaborate effectively with delivery teams to ensure reliable production servicesCreate observability solutions aligned with SLAs and SLOs, maintaining a clear error budgetSupport production systems by conducting root cause analysis and facilitating post-mortemsAssess architectural designs to enhance production stabilityOur Promise to YouWe prioritize your humanity and well-being, offering well-designed co-working spaces, flexible remote work arrangements, parental leave, sabbaticals, and opportunities to work on personal projects.We believe a cohesive team is invaluable, and we strive to maintain stable teams across projects, ensuring you work with trusted colleagues.We are committed to prioritizing your needs and well-being in all aspects of our work culture.

Join the Vanguard of VPN Technology!At NordVPN, we are at the forefront of providing cutting-edge virtual private network solutions, offering more than just security. If you're a proactive innovator who enjoys tackling complex problems, we invite you to be part of our team developing Threat Protection Pro, the NordLynx protocol, and the fastest VPN globally—empowering users with enhanced privacy, security, and control.Your Contribution: Enable millions of users to reclaim their online security, privacy, and data.As a Senior Site Reliability Engineer, you will ensure content accessibility across our worldwide edge network. Your primary responsibility will be to guarantee that traffic reaches our users swiftly, reliably, and securely, no matter where they are located.You will navigate the realms of networking, load balancing, and traffic shaping. When issues arise—be it slowness, inaccessibility, or erratic behavior at the protocol layer—you will be the one to diagnose and resolve them.Key Responsibilities:Ensure seamless content accessibility across a globally distributed edge infrastructure.Design, operate, and enhance load balancing and traffic shaping systems at scale.Troubleshoot connection, latency, and accessibility issues end-to-end.Manage HTTP traffic flow from client to edge to origin and back.Investigate and rectify website and service reachability problems.Work across protocol layers to diagnose issues in depth.Core Qualifications:Proficient in load balancing and traffic shaping techniques—architecture, algorithms, health checks, and failover mechanisms.Experience with NGINX and/or HAProxy—configuration, tuning, and debugging in high-traffic environments.Solid understanding of networking fundamentals, including DNS, routing, firewalls, and packet analysis.Fluency in the OSI model—comfortable working across layers 3 to 7, with knowledge of TCP internals, SSL/TLS handshake, and termination.Experience with SaltStack.Linux administration skills.Proficiency in Python for automation, tooling, and scripting.Ability to troubleshoot network and application layer issues in large-scale production environments.

Join the forefront of online security and privacy.At NordVPN, we are pioneering advanced VPN technologies and fostering an environment where innovative problem-solvers thrive. Be part of the team that developed Threat Protection Pro and the NordLynx protocol, creating tools that empower individuals to reclaim their online privacy, security, and control.Your mission? To help millions of users regain control over their online security, privacy, and data.As a Senior Site Reliability Engineer specializing in Traffic Engineering, you will play a critical role in ensuring content accessibility across our global edge network. Your primary objective will be to guarantee that traffic is delivered swiftly, reliably, and securely to users worldwide.You will operate at the crossroads of networking, load balancing, and traffic shaping. When issues arise—be it slow connections, unreachable services, or protocol-level anomalies—you'll be the one to diagnose and resolve them efficiently.

Join the forefront of online privacy and security with the world's most advanced VPN.At NordVPN, we're on a mission to empower individuals with privacy and control over their online presence. If you are a driven problem-solver with a passion for technology, join our innovative team behind Threat Protection Pro and the NordLynx protocol—tools designed to ensure fast, secure, and reliable internet access.Your Role: As a Senior Site Reliability Engineer with a focus on observability, you'll play a pivotal role in enhancing our monitoring systems. Your efforts will improve signal quality, reduce alert fatigue, and collaborate closely with data teams on anomaly detection, ultimately leading to a deeper understanding of our distributed systems' health and behavior.

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 the forefront of online security with NordVPN.Are you an innovative problem-solver eager to make a difference? Be a part of our exceptional team that develops the Threat Protection Pro, the NordLynx protocol, and the world's fastest VPN, empowering users to reclaim their privacy, security, and control online.Your Contribution: Assist millions in regaining authority over their online safety, confidentiality, and data.At NordVPN, we safeguard millions daily, leveraging a global edge infrastructure with thousands of servers across multiple countries. Our platform engineering team is responsible for building and operating the internal backend systems that facilitate this functionality.We are seeking a Senior Staff Site Reliability Engineer (SRE) to design, develop, manage, and enhance these systems. This role demands high ownership — you will architect solutions and deploy them to production. You will be the cornerstone for others when it comes to rethinking architecture or deploying a service from zero to global scale.

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.

We are seeking pragmatic and self-sufficient Site Reliability Engineers (SREs) who possess a strong foundation in software engineering principles and know how to leverage them to tackle complex infrastructure challenges. The ideal candidate will automate processes first, grasp the broader context, and collaborate effectively with developers to boost velocity without compromising stability or security.This role focuses on innovation and problem-solving rather than merely following runbooks. We value individuals who can:Create and implement tailored solutions when existing tools fall short.Evaluate systems critically with a focus on scalability and resilience.Engage with cross-functional teams, including developers and product managers.Have the potential to advance into Developer Experience (DevEx) roles in the future.

Join the Vanguard of Online Security with NordVPN!Are you a passionate problem-solver ready to make an impact? Become a part of our innovative team responsible for developing Threat Protection Pro, the NordLynx protocol, and the fastest VPN service available—solutions designed to empower users with enhanced privacy, security, and control over their digital lives.Your Contribution: Enable millions of people to reclaim their online security and privacy.As a Senior Site Reliability Engineer, you will oversee our globally distributed VPN and DNS infrastructure, ensuring that millions of users enjoy seamless, fast, and secure connections. Your role will involve deploying, managing, and enhancing VPN nodes across the globe.Collaboration with application teams is key to ensuring optimal client connectivity from end to end. Quality and reliability are paramount in this position.

About ShiftKey ShiftKey connects healthcare facilities with licensed and certified professionals to fill open shifts. By applying marketplace principles and deep industry knowledge, ShiftKey addresses staffing shortages in healthcare and helps facilities connect directly with qualified workers. The platform gives professionals control over their schedules, helping more licensed workers return to the workforce and easing a critical challenge in the sector. Learn more at www.ShiftKey.com. Role Overview ShiftKey is hiring a Site Reliability Engineer in Warsaw to keep the Marketplace platform stable, secure, and highly available. The SRE team works closely with engineering to prevent incidents before they happen. In 2025, the platform recorded only 6 minutes of downtime. Maintaining this reliability, while supporting a migration to a new AWS region, will be a central focus. This role blends hands-on maintenance (reducing technical debt, improving deployments, strengthening observability) with engineering and automation projects that make the platform easier to manage over time. ShiftKey values a "you build it, you run it" approach, but avoids burnout. Thanks to a follow-the-sun model with US-based colleagues, there are no scheduled on-call duties after 5:00 PM Warsaw time. Monthly gross pay ranges from PLN 17,000 to PLN 21,000 under an employment contract (CoE/umowa o pracę). Final compensation depends on experience and skills. Work Location and Schedule Candidates should be based in or near Warsaw. The role is primarily remote. In-person collaboration is encouraged on Tuesdays and Wednesdays to support team connection and culture. What You’ll Do Split time between maintenance/support and development work focused on automation and tooling improvements. Contribute to major roadmap projects, including migrating infrastructure to a new AWS region for better cost and availability. Join the "Sheriff" rotation (about one week per month during standard office hours) to help maintain operational excellence.

Join the forefront of digital security with the world’s most advanced VPN.Are you a proactive problem-solver with a passion for technology? Become part of the innovative team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN available—tools designed to empower individuals with privacy, security, and control over their online presence.Your contribution? Enabling millions to reclaim their online security, privacy, and data.NordVPN operates a global edge infrastructure serving millions of users. This role is crucial for maintaining real-time awareness across that infrastructure, ensuring clarity amidst complexity.We are in search of a Senior Site Reliability Engineer (SRE) with a specialization in observability. You will design and enhance monitoring systems, boost signal quality, minimize alert fatigue, and collaborate with data teams on anomaly detection. You will be instrumental in shaping our understanding of the health and performance of our distributed systems.Main ResponsibilitiesArchitect, develop, and refine monitoring pipelines and observability tools for our globally distributed infrastructure.Establish and execute service-level monitoring based on critical metrics (latency, traffic, errors, saturation).Diminish alert fatigue by creating meaningful and actionable alerts that engineers can rely on.Design and maintain custom exporters, scripts, and integrations for efficient metrics and log collection.Partner with the data team to enhance anomaly detection and data-informed operational insights.Grasp service signals—determine what to measure, why it matters, and interpret the results accurately.Core RequirementsExpertise in distributed systems observability including monitoring architecture, signal design, and dashboarding.Proficient in golden signal methodology—design monitoring with a focus on critical metrics rather than ease of measurement.Experience in alert design—reducing noise, crafting actionable alerts, and managing on-call responsibilities.Proficient in Python for scripting, custom exporter development, automation, and data processing.Solid background in Linux administration and debugging.

About ShiftKey ShiftKey connects licensed and certified healthcare professionals with facilities that need their skills. By using marketplace principles and industry knowledge, ShiftKey addresses staffing shortages across the American healthcare system. The platform gives healthcare workers the freedom to choose their shifts, helping more people return to the workforce. Learn more at www.ShiftKey.com. Role Overview: Site Reliability Engineer The Site Reliability Engineer will focus on keeping ShiftKey’s Marketplace platform stable, secure, and highly available. This role works closely with engineering teams to prevent incidents before they start. In 2025, the platform experienced just 6 minutes of downtime, maintaining and improving this reliability is a key part of the job, especially as the team migrates to a new AWS region. Day-to-day work balances routine platform maintenance, tackling technical debt, improving deployment processes, and boosting observability. There’s also a strong emphasis on engineering and automation to streamline operations over time. This is not a ticket-pushing role. ShiftKey’s culture encourages ownership: “you build it, you run it.” The company supports a healthy work-life balance, with a follow-the-sun model and no on-call duties after 5:00 PM Warsaw time, thanks to support from US-based colleagues. Monthly compensation ranges from PLN 17,000 to PLN 21,000, depending on experience and skills. Work Environment This position is primarily remote for candidates based in or near Warsaw. Team members are expected to work from the office on Tuesdays and Wednesdays to build team connections and company culture. Key Responsibilities Split time between operational maintenance and development projects that improve automation and tooling. Contribute to major roadmap projects, such as migrating infrastructure to a new AWS region to improve cost efficiency and availability. Participate in the "Sheriff" rotation about one week per month during standard office hours.

About ShiftKey ShiftKey connects healthcare facilities with licensed professionals, helping to address staffing shortages across the United States. The platform enables healthcare workers to select their own shifts, bringing more qualified professionals into the system and supporting direct facility-worker connections. Learn more at www.ShiftKey.com. Role Overview: Site Reliability Engineer This Site Reliability Engineer position focuses on keeping ShiftKey’s Marketplace platform stable, secure, and highly available. The role involves close collaboration with engineering teams to prevent incidents and maintain a high uptime standard, targeting only 6 minutes of downtime in 2025. A major focus for the coming year will be supporting the migration to a new AWS region. The work is split evenly between hands-on maintenance (reducing technical debt, improving deployment processes) and engineering tasks that automate and streamline platform operations. The team follows a 'you build it, you run it' approach, but avoids burnout by limiting on-call duties. Thanks to a follow-the-sun support model with US-based colleagues, no on-call shifts are scheduled after 5:00 PM Warsaw time. Gross monthly salary: PLN 17,000 to PLN 21,000 under an employment contract (CoE/umowa o pracę). Final offer depends on experience and skills. Location and Work Arrangement Candidates should be based in or near Warsaw. The role is primarily remote, but in-person collaboration is encouraged on Tuesdays and Wednesdays to strengthen team connections and company culture. Main Responsibilities Split time evenly between maintenance/support and development work, including automation and tooling improvements. Contribute to roadmap projects, such as migrating infrastructure to a new AWS region for better cost efficiency and availability. Participate in the 'Sheriff' rotation (about once a month during office hours) to help ensure platform reliability.

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.

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.

About ShiftKeyShiftKey is revolutionizing the healthcare staffing landscape by directly connecting licensed and certified professionals with healthcare facilities that need to fill shifts. We utilize marketplace dynamics and extensive industry knowledge to tackle America's healthcare staffing shortages. Our platform empowers healthcare workers with the flexibility to choose their work schedules, contributing to the reinvigoration of the workforce in this critical sector. Discover more at www.ShiftKey.com.Role OverviewAs a Site Reliability Engineer, you will ensure our Marketplace platform remains stable, secure, and highly available. You will actively collaborate with engineering teams to preemptively address potential issues. In 2025, our platform achieved an impressive 6 minutes of downtime, and you will be integral to maintaining this standard while overseeing a migration to a new AWS region.This position combines hands-on maintenance tasks (reducing technical debt, enhancing deployment processes, and fortifying observability) with engineering and automation efforts that streamline platform operations over time.Join a culture where 'you build it, you run it' is a mantra, without the risk of burnout. Thanks to our US-based counterparts, we maintain a follow-the-sun model, eliminating scheduled on-call duties after 5:00 PM Warsaw time.Monthly gross salary for this position ranges from PLN 17,000 to PLN 21,000 under an employment contract (CoE/umowa o pracę). Final compensation is determined based on experience and skill level.Work EnvironmentCandidates should be based in or near Warsaw. This role is primarily remote, with encouraged in-office collaboration on Tuesdays and Wednesdays to foster team engagement and cultural development.Key ResponsibilitiesDedicate 50% of your time to operational maintenance and support while the other 50% focuses on active development, enhancing automation and tooling.Contribute to significant roadmap initiatives, including migrating our infrastructure stack to a different AWS region to boost cost-efficiency and availability.Engage in the 'Sheriff' rotation, approximately one week per month during standard office hours.