Senior Software Engineer - Platform Reliability

Location: Poland (Remote/Flexible) About Us: RTB House is a pioneering global technology company that specializes in cutting-edge marketing solutions for leading brands and agencies around the world. Our innovative ad-buying engine is the first globally to leverage Deep Learning algorithms exclusively, empowering advertisers to achieve remarkable outcomes and fulfill their objectives at every level of the marketing funnel. We are in search of Senior Engineers to join our Bidding Platform team, which forms the backbone of our RTB operations, processing over 20 million requests per second to engage in real-time auctions and deliver advertisements to audiences across more than 90 countries. If you are eager to tackle technically intricate challenges and develop robust solutions, this role is tailored for you! Your Responsibilities: Architect and spearhead the implementation of system modifications to enhance performance, scalability, and observability for global ad display and tracking. Create tools and optimizations that yield measurable advancements in critical user performance metrics. Develop, test, deploy, monitor, and maintain HTTP/gRPC services and batch jobs in Java and Python, ensuring compliance with high engineering standards across all aspects, including setup, configuration coding, and production monitoring. Offer technical leadership: tackle complex system challenges, engage in project planning and scoping, and uphold the highest coding standards through active participation in code reviews.

Location: Poland About Us: RTB House is a leading global company that specializes in providing cutting-edge marketing technologies for renowned brands and agencies worldwide. Our unique ad-buying engine stands out as the world's first fully Deep Learning-powered platform, enabling advertisers to achieve exceptional results and meet their objectives throughout every stage of the marketing funnel. We are currently seeking talented engineers to join our Platform Engineering team within the Bidding Platform structure. If you have a passion for system-related topics such as deployment, monitoring, databases, and load balancing, along with experience in leading complex project specifications and coordinating team efforts, we want to hear from you! This is an excellent opportunity for those eager to tackle technically challenging and sophisticated solutions.

We are seeking a highly skilled Senior Microsoft Platform/System Engineer to join our dynamic team at Altersolutions in Warsaw. In this role, you will leverage your deep expertise in Microsoft technologies to deliver innovative solutions that drive business success. Your contributions will be instrumental in enhancing our clients' systems and infrastructure.As a key member of our engineering team, you will collaborate with cross-functional teams to design, implement, and optimize Microsoft-based solutions. Your experience will help guide best practices and ensure the highest quality of service delivery.

Location: Poland About Us: RTB House is an innovative global firm specializing in cutting-edge marketing technologies for leading brands and agencies worldwide. Our proprietary ad-buying engine is the first globally to harness the full potential of Deep Learning algorithms, empowering advertisers to achieve remarkable results at every stage of the customer journey. The Bidding Platform Team plays a pivotal role in our company's success. We collaborate to develop system modules and components that proficiently manage over 24 million queries per second, maintaining an impressive low latency of 50 ms. Your Responsibilities: Architect and develop a diverse range of modules and components within a system that efficiently handles over 24 million queries per second with minimal latency. Optimize developed software focusing on response time and resource utilization. Guarantee the reliability and scalability of implemented solutions. Design performance and correctness tests for new system components. Evaluate new technologies for potential application in production environments. Construct tools for monitoring and analyzing production system operations. Continuously enhance existing tools and processes for improved efficiency.

Oversee the technical management of SimCorp Dimension along with associated enterprise applications.Diagnose and resolve incidents within stipulated operational timelines.Conduct routine software updates and maintenance tasks.Ensure technical documentation is maintained and regularly updated.

AECOM is looking for a skilled Senior Engineer specializing in Transmission and Distribution (Primary). In this pivotal role, you will spearhead the design engineering for High Voltage Substation projects, ensuring that engineering deliverables related to primary circuits are produced on time and to the highest quality standards.Your focus will be on executing project design packages with technical precision while guiding and coordinating CAD designers and drafters in the development of comprehensive drawings and models. The position demands extensive hands-on experience in primary engineering for substations, coupled with effective project delivery in the transmission and distribution sectors.Key ResponsibilitiesDeliver comprehensive primary circuit engineering packages for HV Substation projects, aligning with project scope, timelines, and quality standards.Create and generate primary substation design deliverables, including Single Line Diagrams (SLD), substation layouts and equipment arrangements, busbar and conductor designs, electrical clearances and safety protocols, and earthing and lightning protection calculations.Ensure adherence to project specifications, client standards, and international guidelines (IEC / IEEE / AS).Prepare and uphold high-quality engineering documentation and design reports.

AECOM Enterprise Capabilities is in search of a Senior Engineer specializing in Transmission & Distribution (Secondary). This pivotal role involves overseeing the design and implementation of secondary engineering systems for High Voltage Substations, which encompasses protection, control, automation, and communication systems. The focus is on delivering superior engineering outputs throughout all phases of projects including Front End Engineering Design (FEED), Detailed Design, Construction, and Commissioning support, while ensuring adherence to technical standards, constructability, and reliable substation operations.Generate and present secondary design documentation for High Voltage Substations.Formulate protection and control philosophies, contributing to Basis of Design documentation.Execute engineering designs for AC/DC auxiliary systems, control circuits, interlocking, and automation interfaces.Assist in relay configuration and protection scheme design (distance, differential, overcurrent, busbar, transformer protection, etc.).Ensure designs are feasible, constructible, and consistent with project scope, timeline, and budget.Collaborate closely with the Project Engineer and/or Project Manager to facilitate engineering planning, monitor deliverables, and ensure technical coordination.Work in conjunction with primary, civil, and SCADA/telecom disciplines to guarantee an integrated and clash-free design.Provide limited technical support to junior engineers when required, without formal mentorship obligations.

Join AECOM's Enterprise Capabilities as a Principal Engineer specializing in HV Substations Secondary in Poland!As a key member of our team, you will be responsible for creating and delivering designs for secondary electrical systems within transmission and distribution projects. Your duties will include, but are not limited to:Designing protection and control systems, which encompass relay settings, protection schemes, and interlock systems for substations.Preparing single line diagrams (SLDs), protection logic diagrams, metering layouts, and cable termination diagrams.Creating electrical interconnection diagrams, termination diagrams, cable schedules, and other essential documentation for the effective installation and operation of secondary systems.Conducting relay coordination studies (overcurrent, earth fault, motor protection, distance protection) including relay setting calculations and fault analysis.Performing power system studies, such as load flow analysis, short circuit studies, transient stability analysis, motor starting studies, and arc flash studies.Developing control and relay panel layouts, including general arrangement (GA) drawings, functional block diagrams, and bill of materials (BOMs).Designing SCADA communication schemes and ensuring system integration for protection systems to facilitate seamless interfacing between control and field devices.Reviewing and verifying design documentation to guarantee compliance with industry standards (IEC, IEEE) and utility specifications.Providing support during commissioning and testing phases, including Factory Acceptance Testing (FAT) and site integration of secondary systems.Creating algorithms to enhance system functionality, including fault detection, relay coordination, and stability improvement.Coordinating across disciplines, collaborating with other engineering teams to ensure the integration of secondary systems with primary infrastructure.Preparing external connection tables, cable schedules, and other design documentation as dictated by project specifications.

Join our dynamic Product Security team as a Senior Platform Security Engineer, where your expertise will be crucial in safeguarding our platform that supports multiple products and handles sensitive, high-value information. With our operations expanding, we seek two professionals to strengthen our security efforts.Your role will involve hands-on engineering, where you will design, build, and deploy robust security and privacy controls. This is not about merely defining policies; you will actively contribute to the security architecture of our systems.Your responsibilities will include enhancing supply-chain security through SAST, SCA, container scanning, and CI/CD hardening. Expect a varied role that will challenge you across multiple domains without confining you to a single specialty.What Success Looks Like:Within 90 days, you will have implemented significant, production-level security enhancements.You will take ownership of components of the AuthN/AuthZ model and its execution.You will develop a comprehensive understanding of our data flows and associated privacy risks.Establish yourself as a trusted advisor across teams, able to confidently voice concerns and provide rationale.Effectively reduce risk through practical measures rather than superficial security actions.Your Work Style:This role offers a high degree of autonomy, encouraging you to identify and address issues independently.You will collaborate closely with engineers from different teams, fostering a culture of teamwork.Engaging in constructive disagreements is encouraged, with decisions rooted in data and threat modeling.You will have the authority to block releases on security or privacy grounds when necessary, following clear escalation paths.Proactively addressing problems, even beyond your immediate area, is expected.

Altersolutions is seeking a Senior Platform Engineer (Developer Experience) to lead the establishment and standardization of engineering practices, enhance developer workflows, and define standards for CI/CD and collaboration. This role melds hands-on DevOps expertise with a strong focus on clarity, comprehensive documentation, and effective process design.The primary objective is to boost the efficiency, consistency, and scalability of our engineering organization. In this capacity, you will collaborate closely with engineering leads, product managers, and other key stakeholders to ensure our operational methods are thoroughly documented, clear, and actionable.Key ResponsibilitiesDesign, document, and maintain comprehensive software development processes, encompassing coding standards, branching strategies, testing protocols, release management, and deployment workflows.Engage with engineering managers, team leads, and product teams to gather insights and best practices, facilitating the seamless adoption of tools and methodologies.Convert intricate technical workflows into clear, concise documentation and visual aids (such as flowcharts, process maps, checklists, and templates) to enhance understanding.Assess and implement tools aimed at improving developer experiences (e.g., feature flagging, local development environments, code quality tools).Oversee a central documentation repository (e.g., Confluence, Notion, or Git-based systems), ensuring that all documentation remains current and version-controlled.

About Docplanner Docplanner, formerly ZnanyLekarz, has spent over a decade rethinking the healthcare journey. The company began by asking whether patients were truly at the center of care. Since then, Docplanner has enabled millions to share reviews of their medical experiences and helped doctors simplify appointment management with new digital tools. The mission: make healthcare more human and accessible. Global Reach and Growth Operating in 13 countries, Docplanner supports more than 90 million patients each month and collaborates with over 300,000 healthcare professionals. Backing from investors such as Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners has fueled this growth. The team now includes over 2,500 employees worldwide, yet maintains the entrepreneurial mindset that shaped the company’s early days. The Tech Team Docplanner Tech brings together more than 400 engineers, data scientists, and product experts. Many team members have been with the company for years, contributing to a culture that values both innovation and long-term collaboration. New colleagues are welcomed with genuine enthusiasm. Want to know more about life at Docplanner? Explore Glassdoor reviews or watch this video for a glimpse into the company’s culture. Why Docplanner? Work here has a real impact: every project helps improve healthcare for millions. Docplanner values individuality, believing that diverse perspectives make for better solutions. The company welcomes people to bring their full selves to work. The workplace supports both remote and virtual collaboration, making it easy to contribute from anywhere. Location This Senior Platform Engineer - AI Innovations role is based in Warsaw, with remote-friendly options available.

Role overview Sigma Software Group is hiring a Senior Data Engineer in Warsaw to focus on integrations and the data platform. This position involves designing and building solutions that connect data across the company’s platforms. Collaboration with teams throughout the organization is central to keeping data moving reliably and strengthening the overall data architecture. What you will do Design and implement data integration solutions for various platforms Work closely with cross-functional teams to keep data flowing seamlessly Optimize and maintain data pipelines for performance and reliability Monitor data quality and drive improvements where needed Apply best practices in data management Support the ongoing development of the company’s data architecture Impact This role plays a key part in enabling data-driven decision making at Sigma Software Group. By ensuring reliable, high-quality data is available when needed, the Senior Data Engineer helps establish data as a strategic asset for the organization.

AECOM Enterprise Capabilities is currently in search of a highly skilled Principal Engineer specializing in HV Substations Primary to join our dynamic team in Poland.The role encompasses the preparation of innovative designs and deliverables associated with primary electrical systems for transmission and distribution projects. Responsibilities will include, but are not limited to:Designing primary substation systems, including AIS/GIS configurations, transformer installations, circuit breaker selection, busbar arrangements, switchgear layouts, and disconnectors for voltages up to 800kV.Creating single-line diagrams (SLDs), general arrangement (GA) layouts, equipment sizing, and layout plans for substations and transmission systems.Conducting short-circuit force calculations, busbar sizing, fault current analysis, and designing equipment protection to ensure system stability and safety.Designing earthing systems, including grounding layouts, ground grid systems, and lightning protection mechanisms for substations.Integrating HVDC and HVAC systems, including converter stations, ensuring seamless compatibility with the overall substation design.Developing transformer layouts, encompassing oil containment, busduct routing, and secondary system interfaces.Optimizing substation layouts for both new and upgraded facilities, considering constraints such as space, equipment accessibility, and construction requirements.Reviewing and enhancing control and protection systems for primary substations, ensuring alignment with secondary systems and compliance with grid operator regulations.Collaborating with civil teams to design and integrate foundations, steel structures, and electrical cable routes for full integration with primary systems.Producing equipment specification documents, bill of materials (BOM), and providing procurement support to ensure appropriate equipment selection based on project criteria.Preparing electrical interconnection diagrams, termination diagrams, cable schedules, and other documentation essential for the installation and operation of primary systems.Conducting detailed design and review of auxiliary systems, such as cooling systems, auxiliary power supplies, and battery systems for substations.Designing underground cable systems, including cable sizing, routing, and integration into existing networks, particularly for HV cables.Coordinating with external vendors and contractors to guarantee that the supply and installation of equipment align with design specifications and project needs.

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.

Engineering Manager - Platform** This role can be based remotely in Finland, Switzerland, Poland, UK, Italy, or Germany **At Scandit, we empower individuals with superhuman capabilities. From enabling delivery drivers to optimize their routes, matching patients with their medications, to enhancing retail operations, our cutting-edge technology automates workflows and delivers actionable insights across diverse industries. Join us in our mission to innovate and elevate Scandit to new heights.About the RoleAs the leader of our Platform Engineering (DevOps & SRE) team, you will oversee the vital cloud infrastructure and CI/CD pipeline ecosystem that supports our entire engineering division. Our team is dedicated to refining engineering practices, ensuring efficiency, and accelerating delivery speed. We leverage modern tools such as AI-assisted workflows to enhance planning and execution.We seek an Engineering Manager to guide our Platform Engineering team, providing clarity, structure, and consistent execution. You will collaborate closely with product engineering teams, embracing AI-enabled tools and methodologies to speed up development and enhance engineering effectiveness. This position offers opportunities for expanded responsibilities as Scandit continues to grow, including leading additional engineering initiatives or teams.What You Will DoLead, mentor, and nurture your team.Provide structure and clarity to planning, execution, and reporting.Manage the operation and continuous enhancement of our cloud infrastructure and CI/CD pipelines.Drive cross-team initiatives in security and compliance, such as reducing Snyk vulnerabilities and supporting ISO-related efforts.Enhance security, reliability, and cost efficiency through disciplined processes and clear accountability.Establish roadmaps, milestones, and progress reporting (like OKRs) to keep stakeholders informed of plans, risks, and delivery timelines.Engage in proactive collaboration with product and engineering teams to align priorities and successfully execute shared initiatives.Identify bottlenecks and spearhead improvements to boost engineering velocity.Embrace additional responsibilities and cross-team leadership as Scandit continues to expand.Who You AreYou have a strong background in DevOps/SRE practices.You possess excellent leadership and team-building skills.You are adept at using modern tooling and methodologies to drive engineering efficiency.

Join the forefront of healthcare technology with Docplanner! You may recognize us by our previous name, Znany Lekarz. Over the past 12 years, we’ve been on a mission to revolutionize patient care in healthcare. We empower patients by providing them with tools to leave and read reviews about their medical experiences. Simultaneously, we equip healthcare professionals with technology that streamlines booking management, allowing them to focus on what they do best: caring for patients. Today, we're inviting you to be part of our journey to enhance the human aspect of healthcare.Docplanner's Global ImpactOperating in 13 countries and trusted by over 90 million patients monthly, Docplanner has become a go-to platform for more than 300,000 specialists. We are backed by reputable venture capital firms like Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners. With over 2,500 employees worldwide, we maintain the innovative spirit of a startup, even after a decade in the industry.About Docplanner TechAt Docplanner Tech, our diverse team of over 400 engineers, data analysts, and product managers is dedicated to building our products for all locations. Many of our team members have been with us for over five years, and we take pride in welcoming each new member with enthusiasm.Discover more about our workplace culture through our Glassdoor reviews or see how it feels to be your authentic self at work in this video.Why Join Us?Being part of our team means contributing to a better world, making a tangible difference. You can rest easy knowing your work aligns with your values and has a meaningful impact. We believe in embracing diversity and creating a healthcare experience that reflects the rich tapestry of human experience. With us, you can bring your whole self to work—whether that means working remotely or choosing to come into the office.

QED AI is an innovative technology firm dedicated to enhancing public health and food security in Sub-Saharan Africa. By developing cutting-edge digital infrastructure and leveraging AI, we operate at the critical intersection of humanitarian aid and scientific research. Our initiatives include monitoring diseases such as HIV, malaria, and tuberculosis, as well as conducting nutrient analyses for crops and soils across various African nations. Our funding sources include prestigious philanthropic and governmental organizations such as the Global Fund, Gates Foundation, and the CDC.We are seeking a mid/senior Data Platform Engineer (Backend) to join our dynamic team in Warsaw. Ideal candidates will possess the following:Proven experience in designing and maintaining data pipelines utilizing ETL and/or ELT methodologies, with a critical eye on trade-offs rather than adhering to a single pattern.Solid understanding of data pipeline reliability, including concepts of idempotency, backfills, and the management of late or corrected data.Ability to structure data systems into distinct layers (e.g., raw, cleaned, curated) and articulate their varying functions and guarantees.Experience with making informed decisions between batch, micro-batch, and streaming methods based on latency, accuracy, and operational complexity.Strong foundation in software engineering principles, version control, writing clean code and tests, robust design, and a grasp of basic data structures and algorithms.Ability to conceptualize logical software architectures and communicate clearly, both verbally and in writing.Eagerness to engage with a diverse range of problems and technologies.Willingness to participate in regular design sessions, code reviews, and collaborate effectively within teams.Experience with UNIX-based or OSX-Darwin development environments.Working proficiency (≥C1) in English, both spoken and written (minimum typing speed of 45 words per minute).Interest in collaborating with individuals from different cultural backgrounds.Demonstrated emotional resilience and social intelligence.A genuine passion for your work and a generally optimistic outlook, while recognizing the value of constructive skepticism.Additional skills that are advantageous but not mandatory include:Understanding of analytical data modeling concepts, including hierarchical and dimensional modeling.

WHAT IS BOXBox Inc. (NYSE:BOX) is at the forefront of Intelligent Content Management, revolutionizing how businesses manage their content and foster collaboration. Our innovative platform empowers organizations to secure critical content, streamline business workflows, and leverage enterprise AI to drive success in the AI-first era. Since our inception in 2005, we have simplified operations for leading global firms such as JLL, Morgan Stanley, and Nationwide, with our headquarters located in Redwood City, CA, and offices throughout the United States, Europe, and Asia.By becoming a part of Box, you will play a pivotal role in driving our platform's evolution. Content is the lifeblood of modern work, comprising the myriad files and information exchanged across teams and departments daily. Our mission is to infuse intelligence into content management, enabling our customers to transform their workflows entirely. With the integration of AI and enterprise content, the potential to reshape how organizations collaborate has never been more significant, and at Box, you'll be at the forefront of this transformation. WHY BOX NEEDS YOUAs Box continues to scale its AI capabilities and internal analytics, we are looking for experts to harness these tools to drive smarter business decisions.You will be responsible for designing and deploying AI agents and operational solutions that bolster both IT and business workflows. These agents will be crafted to minimize inaccuracies while prioritizing security in their modeling, data processing, and decision-making. Additionally, you will build and maintain MCP servers and developer tools that yield actionable data insights, facilitating prompt actions for teams. Ultimately, your contributions will link secure, reliable infrastructure with practical AI capabilities, enhancing informed and low-risk decision-making throughout the organization.WHAT YOU’LL DODesign, develop, and implement AI agents to automate and enhance IT and business workflows, ensuring reliable outputs.Establish model validation, monitoring, and fail-safe systems to identify and mitigate incorrect or risky agent behaviors.Architect secure data handling pipelines for data ingestion, storage, access control, and encryption to protect sensitive information.

At Tenstorrent, we are at the forefront of transforming the AI landscape, enhancing performance, usability, and cost-effectiveness. As AI reshapes the computing world, our solutions adapt to integrate advancements in software models, compilers, platforms, networking, and semiconductors. Our talented team of technologists has crafted a high-performance RISC-V CPU from the ground up, driven by a shared enthusiasm for AI and an unwavering commitment to creating the premier AI platform. We cherish collaboration, curiosity, and the challenge of tackling complex problems. Join us as we expand our team, welcoming talents of all experience levels.Our AI Software Infrastructure team develops the foundational platforms that facilitate internal development, orchestrate workloads, and manage extensive AI hardware across on-premises data centers. This team is responsible for creating and deploying infrastructure utilized both internally and externally on Tenstorrent systems.This position is hybrid, with options to work from Toronto, ON; Santa Clara, CA; Austin, TX; Belgrade, Serbia; or Warsaw, Poland.We encourage applicants from diverse experience backgrounds for this role. Candidates will be evaluated during the interview process for the appropriate level, and offers will be adjusted accordingly, which may differ from the current posting.