Operating System Tool Software Engineer

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.

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.

Design, develop, and enhance API platforms and application security solutions using Java (JDK 21).Deploy and manage software solutions on the OpenShift platform.Create and maintain documentation to assist the organization in the implementation of developed solutions.Develop tools and procedures for effective monitoring, logging, and deployment optimization.Execute essential operations including patching and certificate management.

Uni Systems is looking for a Lead ServiceNow Platform Specialist to join the team in Warsaw. This role focuses on guiding the ServiceNow platform through its full lifecycle, from design and implementation to ongoing operation and optimization. The position calls for close collaboration with Architects, Developers, and internal stakeholders to ensure the platform remains secure, reliable, and aligned with business needs. Main responsibilities Ensure the ServiceNow platform is secure, available, and performing well, working closely with Architects and Developers. Oversee development, enhancements, and troubleshooting activities. Manage the platform’s lifecycle, including design, implementation, operation, and optimization. Conduct demonstrations and training sessions for end users and support teams. Collaborate with stakeholders to assess expectations and platform requirements. Collect, analyze, and validate business and user requirements. Translate requirements into technical solutions that meet architectural standards. Communicate solutions to both technical and non-technical audiences. Support the rollout of service management capabilities across the organization. Coordinate platform development and enhancement with Architects and Developers. Provide input on business requirements and technical designs. Contribute to solution architecture and development. Assist cross-functional teams with risk management, security, and disaster recovery planning. Maintain up-to-date documentation, including technical specifications, SOPs, user guides, and knowledge base articles. Collaboration and impact This position works at the intersection of technology and business, ensuring ServiceNow meets evolving organizational needs. The Lead ServiceNow Platform Specialist communicates with both technical and non-technical stakeholders to deliver effective solutions and support ongoing platform improvement.

Role Overview Clifford Chance is seeking a Senior IT Specialist for its Warsaw HUB. This position oversees daily IT operations, maintains system integrity and security, and supports legal teams with technology solutions. Main Responsibilities Oversee and maintain IT systems to ensure reliability and security Support legal teams with technical solutions and troubleshooting Contribute to technology projects and process improvements Work with cross-functional teams to implement IT management practices Team and Collaboration This role works closely with colleagues across departments. Expect to participate in collaborative projects and help introduce new IT solutions to support the firm’s legal work.

Join Software Mind as a ServiceNow Project & Delivery Manager where you will lead and oversee the successful delivery of critical projects. You will be responsible for ensuring the projects are completed on time, within budget, and to the satisfaction of clients. Your expertise in ServiceNow will be pivotal in driving efficiencies and innovation in project delivery.

Join AECOM as a skilled Network Designer, specializing in the development and design of water and sewage systems. In this role, you will be responsible for creating innovative and efficient network solutions that meet the needs of our clients. Collaborate with a dynamic team of professionals to ensure the successful execution of projects, from conception through to completion.

Join the innovative team at nordsec as a Senior Frontend Engineer specializing in React within our Network Department. In this role, you will leverage your expertise to create dynamic and responsive user interfaces that enhance our network solutions. Collaborate with cross-functional teams to deliver high-quality software that meets our users' needs.

Join Fairmarkit, the leading autonomous sourcing platform that is redefining the procurement landscape globally. Our innovative technology leverages automation, AI, and GenAI to empower procurement teams to optimize their sourcing strategies efficiently and competitively. With solutions designed for tail spend and strategic sourcing, we help organizations reduce cycle times, eliminate unnecessary costs, achieve ESG and diversity goals, and enhance the experience for both internal stakeholders and suppliers. Recognized by esteemed organizations such as Gartner and IDC, we are supported by notable investors including Notable Capital and Insight Partners.We are seeking a Senior Payroll, HR Administration & Accounting Specialist to oversee accounting, payroll, employee documentation, and statutory reporting for our Polish operations. This hands-on, in-house role requires a professional who can operate independently, ensure compliance with Polish regulations, and effectively support our local operations while reporting to our US parent company.Accounting, Banking & Financial OperationsResponsible for day-to-day accounting documentation, payments, and banking activities for the Polish entity:Maintain accounting and financial recordsReview invoices and supporting documentsPrepare documentation for monthly, quarterly, and annual closingsManage payments and banking operationsMonitor expenses and payment timelinesHR Administration, Payroll & Personnel DocumentationMaintain employee personnel files (akta osobowe) in compliance with Polish legal requirementsPrepare employment contracts, civil law agreements, B2B agreements, and related HR documentsCalculate payroll and benefits, as well as other employee-related paymentsPrepare and submit declarations and reports to ZUS, Urząd Skarbowy, GUSEnsure timely payment of taxes, social security contributions, and other mandatory chargesAssist employees and managers with HR and payroll-related inquiriesStatutory Compliance & External ReportingPrepare and submit necessary documentation to public institutions and external partiesServe as the local point of contact for ZUS, Urząd Skarbowy, and other relevant authorities

Senior Marketing Automation SpecialistRole OverviewAt BlackBox Strategies, we are on the lookout for a dynamic and execution-focused Senior Marketing Automation Specialist to lead our outbound and lifecycle messaging initiatives targeting both B2B and B2C audiences.This position is perfect for a professional who:Excels in hands-on execution of marketing strategies.Collaborates on strategic plans and is capable of independently delivering results.Possesses a deep understanding of the differences in marketing motions for B2B and B2C across channels such as email, CRM, and SMS.Works closely with a Social Media Manager to ensure cohesive messaging and timing.You will collaborate with leadership to set priorities and take full ownership of execution from start to finish.About BlackBox StrategiesBlackBox Strategies is a leading revenue execution agency dedicated to empowering businesses through disciplined go-to-market strategies, effective outbound execution, and lifecycle optimization. We specialize in designing and managing revenue systems across email, CRM, and digital channels, seamlessly bridging strategic planning with hands-on execution to deliver measurable results for our diverse B2B and B2C clientele.

CreatorIQ develops the operating system for creator-led growth, supporting over 1,300 brands and agencies worldwide. The company encourages both in-person and remote collaboration, valuing innovation and teamwork in its flexible work model. Recognition from organizations such as BuiltIn LA and NY, Deloitte Technology Fast 500™, IDC MarketScape, The Forrester New Wave™, G2, and Influencer MarketingHub highlights CreatorIQ’s reputation and dedication to influencer marketing solutions. Role overview The Senior Customer Enablement Specialist leads complex enablement initiatives for the Strategic Account Group (SAG) and scaled programs. Based in Warsaw, this role requires experience in enablement, the ability to work independently, and a talent for mentoring others while maintaining high execution standards. Responsibilities include handling challenging customer use cases and setting the standards, templates, and best practices for enablement across the team. What you will do Lead complex SAG enablement delivery Oversee enablement delivery for the most complex SAG customers and workflows Design tailored training solutions that align with customer business goals Implement enablement deliverables as specified in SAG Services agreements Serve as a trusted advisor to customer stakeholders on enablement topics Develop advanced customer help centers and playbooks Design and launch advanced Help Centers covering multiple workflows Create detailed playbooks that act as long-term reference materials for customers Maintain accuracy, clarity, and alignment in all enablement content

Join our dynamic team at Mirantis as a Senior QA Engineer specializing in Cloud and Storage solutions. We are on the lookout for an experienced and motivated professional who excels in cloud-native platforms and storage systems. This pivotal role requires a blend of technical expertise and leadership in test strategy, automation, and quality assurance. Your contributions will be vital in ensuring our solutions achieve unparalleled standards of reliability, scalability, and performance across various storage subsystems, distributed systems, and Kubernetes environments.Key ResponsibilitiesTest Strategy & Quality LeadershipDesign and implement comprehensive QA strategies tailored to storage, cloud-native, and distributed environments.Lead risk assessments, test planning, and evaluate release readiness.Set quality benchmarks, release metrics, and establish data-driven feedback mechanisms to guarantee production-grade releases.Promote a quality-centric culture and influence design and architectural decisions with testing principles in mind.Test Infrastructure & AutomationCreate, enhance, and oversee scalable automated testing frameworks and infrastructures.Design and manage testing systems for validating storage, microservices, and hybrid-cloud workloads.Seamlessly integrate automation into CI/CD pipelines (e.g., Jenkins, GitHub Actions) to ensure reliability and maintainability.Employ Infrastructure-as-Code methodologies to craft repeatable, extensible, and robust test environments.Advanced Testing & Continuous ImprovementConduct functional, non-functional, integration, system, performance, and failover testing.Simulate production-like workloads, failure scenarios, and perform recovery testing across distributed clusters.Incorporate chaos, performance, and security testing into the development lifecycle.Collaborate closely with DevOps and engineering teams on monitoring, debugging, and enhancing resilience.Mentorship & CollaborationGuide junior QA engineers and developers in advanced testing methodologies and automation techniques.Act as the QA authority during design reviews, incident retrospectives, and readiness assessments for production.Engage with geographically dispersed teams to tackle technical challenges and drive continuous quality improvements.

Role Overview WPP Media is looking for a Senior Digital Trading Specialist in Warsaw, Poland. This position focuses on shaping and executing trading strategies to improve digital advertising results. The role works closely with teams across the company to boost media performance and use data analytics to guide key decisions. What You Will Do Develop and refine digital trading strategies that support business objectives Collaborate with cross-functional teams to strengthen media outcomes Apply data analysis to inform and improve trading decisions Lead initiatives that promote effective digital advertising practices Share expertise and help implement best practices across projects

Collect and analyze requirements across various product domains including accounts, cards, insurance, loans, and funds.Assist in the analysis and resolution of incidents in both test and production environments.Coordinate projects and changes according to organizational procedures.Develop comprehensive business and systems documentation.Collaborate effectively with both frontend and backend teams.

Join Altersolutions as a Senior Electrical Engineer and contribute your expertise to innovative projects that drive technological advancement. You will play a pivotal role in designing, developing, and optimizing electrical systems, ensuring compliance with industry standards, and collaborating with cross-functional teams to deliver top-notch solutions.

CD Projekt Red is hiring an Administrative Specialist for the Systems & Settlements division in Warsaw. This is an entry-level role focused on keeping daily operations running smoothly and supporting the team’s organizational needs. Main responsibilities Handle a variety of administrative tasks to assist the division Maintain, update, and organize records Provide support for project management activities as needed Who this role is for This position is a good match for candidates at the start of their careers who want to gain experience in a creative setting. An interest in operational support and careful attention to detail are important for success in this role.

Role Overview EcoVadis is hiring a Senior Application Security Specialist in Warsaw. This role focuses on protecting company applications and systems. The specialist will work to find vulnerabilities, put security controls in place, and partner with teams across the business to strengthen security practices. Key Responsibilities Identify and assess security vulnerabilities in applications and systems Implement measures to reduce risk and improve security Collaborate with cross-functional teams to support secure development and operations

Join our dynamic team at Altersolutions as a Senior Mechanical Engineer. In this role, you will leverage your extensive expertise to design and develop innovative mechanical systems and components. You will work closely with cross-functional teams to ensure that solutions meet project specifications and client requirements. Your contributions will help drive our mission of delivering exceptional engineering solutions.

Join our dynamic team at Margo Group as a Senior Site Reliability Engineer (SRE) / DevOps Specialist. In this pivotal role, you will be instrumental in enhancing our developer platform and establishing robust CI/CD standards across various teams. We seek an innovative thinker who thrives on designing solutions rather than merely maintaining them.Your Responsibilities:- Architect and implement CI/CD pipelines- Standardize deployment processes and pipelines across teams- Optimize the Kubernetes platform through improved deployment patterns and automation- Develop tools to streamline developer workflows using Python- Design artifact repository structures and implement effective versioning strategies- Lead or co-lead SCM and CI/CD migrations- Collaborate closely with development teams, serving as a technical partnerWhat We Expect:- A minimum of 5 years of strong experience in designing CI/CD pipelines across diverse projects- Expertise in Kubernetes and containerization technologies- Proficient in automation using Python or Bash scripting- Experience in troubleshooting system issues that extend beyond the pipeline- Excellent communication skills for effectively conveying technical concepts to teamsPreferred Qualifications:- Proven experience in migrating developer platforms (Git, CI/CD, artifact storage)- Knowledge in DevSecOps and Identity Access Management (IAM)- Background in building internal developer platforms (platform engineering)

Join Box as a Senior Backend Software Engineer and be part of a pioneering team that is reshaping the world of Intelligent Content Management. In this role, you will work on high-scale, distributed systems, tackling significant engineering challenges such as performance optimization, auto-scaling microservices, ensuring data integrity during large migrations, and maintaining search indexing accuracy. Your contributions will directly impact thousands of enterprise customers, helping them manage their critical business content effectively. If you're ready to drive innovation in AI-powered content management, we want to hear from you!