Fullstack Software Engineer Senior Level jobs in Warsaw – Page 5 | RoboApply Jobs

Fullstack Software Engineer Senior Level jobs in Warsaw· Page 5

Results 81–100 of 812 for “Fullstack Software Engineer Senior Level” in Warsaw.

812 jobs found

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Nord Security logo
Full-time|On-site|Warsaw

Join Our Team at NordLayer!At NordLayer, we are on a mission to deliver scalable cybersecurity solutions tailored for modern businesses.Our innovative platform empowers teams to operate efficiently without the burden of security concerns. Trusted by over 11,000 global companies, NordLayer seamlessly integrates with any technology stack to safeguard users acr…

Apr 12, 2026
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Waymo LLC logo
Full-time|Hybrid|Warsaw, Masovian Voivodeship, Poland

Waymo is pioneering the future of mobility with its cutting-edge autonomous driving technology. Established in 2009 as the Google Self-Driving Car Project, our mission is to become the world’s most trusted driver. Our flagship product, the Waymo Driver—The World’s Most Experienced Driver™—aims to revolutionize access to transportation while drastically reducing road traffic fatalities. The Waymo Driver powers our fully autonomous ride-hailing service and is compatible with various vehicle platforms and applications. With over ten million rider-only trips completed and vast experience from driving over 100 million miles on public roads and extensive simulations across more than 15 U.S. states, we are leading the way in safety and efficiency.The RO Performance team plays a pivotal role in enhancing Waymo's self-driving technology. We are responsible for developing and maintaining the crucial infrastructure needed to process and analyze vast amounts of data from real-world driving logs and simulations.Our systems create essential metrics and dashboards that are vital for monitoring product performance, pinpointing areas for enhancement, and facilitating data-driven decision-making. The insights generated by our team directly impact Waymo's operational strategies, weekly performance evaluations, and, ultimately, the safety and reliability of our autonomous vehicles.In this hybrid role, you will report directly to a Staff Software Engineer.

Feb 10, 2026
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Hostinger logo
Full-time|Remote|Warsaw

Join Hostinger as a Backend Software Engineer specializing in Node.js in a fully remote position! In this role, you will be responsible for developing high-performance backend solutions that support our web applications and services. Collaborate with a dynamic team of developers and contribute to exciting projects that empower our users around the globe.

Mar 18, 2026
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altersolutions logo
Full-time|On-site|Warsaw

Dołącz do naszego zespołu jako Fullstack Developer (.NET + Angular) i pracuj z wiodącym klientem w branży ubezpieczeniowej. Będziesz odpowiedzialny za projektowanie oraz rozwijanie nowoczesnych aplikacji, które spełniają potrzeby naszych klientów. Jeśli posiadasz doświadczenie w .NET oraz Angular, ta oferta jest dla Ciebie!

Oct 23, 2025
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SumUp logo
Full-time|On-site|Warsaw, Poland

Join Our Innovative TeamAt SumUp, we are dedicated to transforming the way businesses operate through our cutting-edge Point-of-Sale (POS) solutions. Our platform empowers a diverse range of businesses, from cafes and bars to retail shops and salons, providing them with essential tools to enhance their operational efficiency and drive growth.Our POS system seamlessly integrates into the SumUp SuperApp, compatible with both our proprietary hardware and mobile devices, making it versatile and user-friendly.As a Senior Android Developer, you will work alongside a dynamic, multidisciplinary team, including Product Managers, Designers, Engineering Managers, and other talented engineers, to deliver exceptional mobile applications.Your RoleWe are transitioning to a Kotlin Multiplatform (KMP) strategy to facilitate shared development across Android and iOS platforms. In this position, you will not only enhance your skills but also play a pivotal role in implementing this innovative technology, influencing the future of our mobile applications.We are looking for a developer who prioritizes user-centric design, values precision, and excels in collaborative environments. You will bring clarity to communication and thrive within a cross-functional team.This is a B2B role based in Warsaw.Key ResponsibilitiesDevelop and implement new features for the item catalog within the SumUp SuperApp.Contribute to the architecture of the application and support our Kotlin Multiplatform strategy.Maintain and enhance our unified Android application, ensuring high-quality and scalable solutions across 60+ countries.Drive the evolution of our product by identifying opportunities for improvement and participating in daily decision-making.Create comprehensive documentation and execute robust testing for features prior to release.Collaborate closely with Designers, Product Managers, and Android engineers to ensure a cohesive user experience across platforms.Ideal Candidate ProfileOver 8 years of experience in mobile engineering, specifically with Android and Kotlin.At least 2 years of experience working with Jetpack Compose.A strong understanding of software design patterns (e.g., MVVM, MVI) and expertise in creating modular, scalable app architectures.Proficient in reactive programming concepts (Flow, Coroutines, and Concurrency).A solid grasp of testing best practices, ensuring high-quality deliverables.

Feb 20, 2026
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Viktor logo
Full-time|On-site|Warsaw

Viktor is your AI-powered coworker, seamlessly integrating with Slack and Microsoft Teams to connect with thousands of tools, delivering real solutions for diverse sectors including finance, marketing, operations, and engineering. Our mission is to consolidate the SaaS landscape, providing companies with an efficient, singular teammate.Our team may be small, but the impact we aim for is immense.The RolePicture this: a team member in Slack requests Viktor to reconcile their Stripe payouts against their financial records. In less than a minute, Viktor completes the task. This success results in new customers joining our platform. Your mission will be to enhance Viktor's capabilities, increasing reliability and expanding our customer base. You'll be a pioneer, creating a platform that others will aspire to replicate.In Warsaw, our product, growth, and engineering teams collaborate closely. You'll work alongside individuals who interact with customers daily, partner directly with the founders, take ownership of significant product areas, and see your code in production on the very same day you write it.What You'll DoDevelop the agent runtime. Create a sandboxed execution environment, orchestrate tools, and manage memory. This is the core of Viktor that translates Slack commands into actionable items through real APIs.Implement integrations. We connect with thousands of tools like Salesforce, Notion, Stripe, QuickBooks, HubSpot, Shopify, and more, based on customer requests. You'll handle OAuth, webhooks, schema mapping, and error management, unlocking new customer opportunities with each integration.Manage infrastructure. With over 600,000 tool calls daily, ensure Viktor remains fast and cost-effective through container orchestration, autoscaling, and task management.Deliver product features. Features will go live directly to users via Slack and Teams, allowing you to witness them being utilized within hours.Adapt to various challenges. As part of a small team, you will tackle diverse tasks that may not be outlined here.How You'll Know You're SucceedingYou’ll be pushing updates to production daily, and your contributions will be evident in the changelog.A feature you’ve developed will directly contribute to a customer's success.If Viktor encounters issues at 3 AM, you'll be equipped to resolve them, having a comprehensive understanding of the system.Founders will write less code as you take over areas they previously managed.What We're Looking ForProficient coding skills. You are fully engaged in coding and take ownership of your work.

Apr 13, 2026
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altersolutions logo
Full-time|On-site|Warsaw

Join our innovative project aimed at transforming business processes through the power of artificial intelligence and cutting-edge technology. This initiative focuses on intelligent data management and facilitates automated decision-making, leveraging modern, high-performance solutions to ensure optimal efficiency, robust security, and seamless scalability.

Jul 30, 2025
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Veeam Software logo
Full-time|On-site|Warsaw, Poland

Location: Warsaw, Poland About Veeam Software Veeam Software helps organizations understand, secure, and strengthen the resilience of their data and AI systems. With headquarters in Seattle and teams in more than 30 countries, Veeam supports over 550,000 customers worldwide. The company focuses on data resilience and security posture management, operating where identity, data, security, and AI risk intersect. Role Overview The Senior Security Engineer will lead the design and development of authentication and authorization architecture for Veeam Data Cloud (VDC), a cloud-native SaaS platform. This position centers on evaluating, defining, and improving the authorization model, including Role-Based Access Control (RBAC) and other advanced security controls.

Apr 15, 2026
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Sensor Tower logo
Full-time|On-site|Warsaw

Fraud Warning: Beware of potential scams posing as legitimate job opportunities. To ensure your application is considered, please apply only through the official Sensor Tower website or directly through our authorized profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account information during the application process. All official communications will originate from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and no conversations will shift to external email or text platforms. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Recruitment Agencies: Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not cover fees related to unsolicited resumes and will not compensate agencies without a signed agreement.About This Role:Are you excited by the dynamic environment of a startup?Do you have a passion for developing high-impact, rapidly deployed products?Are you committed to mentoring emerging engineers and championing technical excellence?Join us in revolutionizing how insights are derived in digital marketing!Apply today!Role Summary:As a Mid / Senior Frontend Engineer at Sensor Tower, you will play a crucial role in developing top-notch products and features that enhance our user experience. Our flat organizational structure allows for your input to significantly influence product design and development.

Feb 26, 2026
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Sigma Software Group logo
Full-time|On-site|Warsaw

Join our dynamic team as a Middle Embedded Software Engineer at Sigma Software Group in Warsaw! We are looking for a passionate engineer who is eager to contribute to innovative projects in embedded systems development. You will work in a collaborative environment, leveraging your skills to create high-quality software solutions.

Apr 1, 2026
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Box Inc. logo
Full-time|On-site|Warsaw, Poland

Join Box Inc. as a Mid-Level Java Engineer and take part in building innovative solutions that streamline processes and enhance user experiences. You will collaborate with a team of talented developers, contributing to the design, development, and maintenance of high-quality software applications.We value creativity, teamwork, and a passion for technology. If you are eager to tackle challenging problems and develop your skills in a supportive environment, we would love to hear from you!

Apr 7, 2026
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Palantir Technologies logo
Full-time|On-site|Warsaw, Poland

Join a Transformative CompanyAt Palantir, we are dedicated to developing innovative software that tackles some of the world's most pressing challenges. We collaborate with major institutions globally to revolutionize their data and technology utilization. Our solutions have been instrumental in preventing terrorist activities, advancing medical research, enhancing financial market strategies, and much more. If you're passionate about impactful projects, we invite you to become part of our team.Your RoleAs a Forward Deployed Software Engineer (FDSE), you will engage directly with clients to swiftly assess their most critical issues and devise data-driven solutions. Our clients depend on Palantir’s platforms for essential operations, often beginning with probing questions like “What causes our flight delays?” or “How can we improve money laundering detection?” In this role, you will leverage your analytical prowess, creativity, and technical expertise to empower organizations to harness their data for significant global impact. You will gain unparalleled insights and contribute to vital industries and institutions.Your responsibilities will parallel those of a startup CTO, working in agile teams with minimal oversight while taking full ownership of high-stakes projects. Your daily tasks may include architectural discussions with engineers, managing vast datasets, developing custom web applications, liaising with client executives, or strategizing with your team.Whether your aspirations lie in entrepreneurship or engineering leadership, Palantir offers an unparalleled environment — with exceptional colleagues — to cultivate your skills. You will learn to dissect complex problems, evaluate the implications of solutions, explore new technologies and programming languages, and even contribute to their development. You will operate independently while being supported by a community that encourages your growth and challenges you to excel.Our Core Values• Impact: Engage in significant and challenging projects that drive positive change.• Ownership: See projects through from conception to completion, overcoming any challenges along the way.• Collaboration: Work closely with diverse teams, including fellow FDSEs, product teams, and Deployment Strategists, as well as with clients on-site to address their needs.• Trust: We empower each other to manage our time and priorities effectively, allowing for independent thought and decision-making.• Growth: We motivate ourselves and colleagues to pursue new challenges and opportunities for personal and professional development.

Jul 20, 2021
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Capital logo
Full-time|Hybrid|Warsaw, Mazowieckie, Poland

Join us at capital, a premier trading platform expanding globally. Our award-winning products, recognized for their advanced technology and exceptional client experience, set the standard in the industry. We are on the lookout for top-tier talent to join our dynamic engineering team.We are currently enhancing our Backend Team and seeking passionate Java Software Engineers with a keen interest in trading! Our engineering team is crucial in maintaining the performance, security, and reliability of our products. With a focus on delivering superior performance, ensuring compliance, and protecting client data, your contributions will significantly enhance the trading experience for our clients.We value engineers who not only write exceptional code but also embody our core values. We are searching for individuals who are ready to move quickly, willing to innovate and develop, who understand the importance of listening, respecting, and supporting, strive to exceed client expectations, and take full ownership for achieving real impact.

Jun 13, 2025
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Teltonika Networks logo
Full-time|Hybrid|Warsaw, Masovian Voivodeship, Poland

Teltonika Networks is looking for a Junior Backend Software Engineer to join the team in Warsaw, Masovian Voivodeship, Poland. The company develops networking equipment for industrial and enterprise use, including routers, switches, gateways, and modems. Teltonika’s technology supports clients in sectors such as Industry 4.0, Smart City, and Green Energy. For more details on their products, visit Teltonika Products. Role overview This position involves hands-on work with embedded Linux software and API frameworks for IoT devices. The team is international and values collaboration to solve technical challenges. The role is well suited to early-career engineers who want to deepen their technical skills while working on real-world projects. Main responsibilities Design, implement, and maintain embedded Linux software for IoT hardware. Develop and support an API framework used by multiple R&D teams. Analyze and integrate new technologies into existing systems. Collaborate with colleagues from different countries to address complex problems. Requirements At least 1 year of experience programming in C. Minimum 1 year working with APIs. Proficient in Shell and Python scripting. Familiarity with Git version control. Experience working with Linux-based systems. Strong English communication skills, both written and spoken. Preferred qualifications Technical degree in a relevant field. Understanding of computer networking concepts. Experience with Lua programming. Knowledge of OpenWrt. Benefits Opportunities for growth within a growing company. Work on ambitious projects focused on industrial networking devices. Private medical care (Medicover Premium) and Multisport card. Hybrid work model with flexible arrangements. Extra day off for your birthday. Team-building activities to support collaboration.

Apr 23, 2026
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Complexio logo
Full-time|On-site|Warsaw, Masovian Voivodeship, Poland

Join Complexio, where we are revolutionizing enterprise AI by developing an intelligence layer that automatically connects and enhances understanding of an organization’s personnel, processes, and systems. Our innovative platform processes both structured and unstructured data to create a dynamic Event Knowledge Graph, orchestrating a variety of AI models to discover hidden workflow enhancements and facilitate autonomous actions.As a Senior Full Stack Engineer, you will be at the forefront of shaping the user experience for thousands of enterprise users. Collaborating with a talented team of software engineers, data scientists, product specialists, and business analysts, you will help design next-generation web applications that bring our state-of-the-art automation capabilities to life. Your contributions will be vital in transforming complex data insights into user-friendly, efficient, and scalable interfaces, connecting advanced AI infrastructure with tangible business results.If you have a passion for integrating sophisticated front-end engineering, full-stack product development, and cutting-edge enterprise AI solutions, and thrive in a fast-paced, highly technical environment, we invite you to apply!

Dec 2, 2025
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Rydoo logo
Full-time|Hybrid|Warsaw, Masovian Voivodeship, Poland

At Rydoo, we transform the way businesses manage expenses, allowing teams to concentrate on what truly matters instead of tracking receipts. With over one million users, we empower organizations to submit, approve, and oversee expenses in a streamlined and intelligent manner.Our partner, Semine, shares this vision. Since its inception in 2015, Semine has been pioneering AI-driven solutions that eliminate tedious accounting tasks, enabling finance teams to operate more efficiently.In July 2025, Semine united with Rydoo to innovate the future of financial automation. Together, we are developing a comprehensive AI-powered platform that simplifies accounts payable and expense management, facilitating faster, easier, and more intelligent financial operations for businesses.Our diverse global team of over 200 professionals is driven by the belief that exceptional technology should enhance life. If you have innovative ideas and a desire to contribute to meaningful solutions, you will excel in our environment.

Mar 9, 2026
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Telemedi logo
Full-time|Remote|Remote — Warsaw, Masovian Voivodeship, Poland

Join Our Growing IT Team!At Telemedi, we are in search of enthusiastic Junior Developers eager to grow their skills in the dynamic world of software development. With a strong focus on integrating AI technologies into our workflow, we encourage candidates who are ready to embrace innovation.Embrace the Future of Software DevelopmentGone are the days of traditional programming; the new era is here, and we are at the forefront of change. By leveraging the latest technologies and our commitment to excellence, we aim to build faster, better, and stronger solutions than ever before.Collaborate with Cutting-Edge ToolsOur developers work with Cursor AI (cursor.com), an innovative IDE that transforms programming paradigms. We expect you to be able to achieve in hours what others might take days to complete.What We’re Looking For:Desire to work in a product-based company where your contributions directly impact business outcomes.Ambition to grow through hands-on experience rather than just courses.Solid foundational knowledge in modern programming practices.A passion for a fast-paced environment where innovation is key.A sense of accountability for your work and that of your team.Openness to constructive feedback to improve your craft.A willingness to tackle challenges and navigate complex applications.A knack for understanding business needs and effective communication across departments.Ability to swiftly and efficiently create quality applications and features.A proactive attitude towards improving processes within your team.Your Responsibilities:Participate in the end-to-end development of IT solutions (we believe in collaborative efforts).Enhance web applications through new features, bug fixes, and refactoring.Engage in the design of new architecture and development infrastructure.Contribute to code reviews and ensure the quality of developed solutions.Consistently elevate development process standards.Work closely with the team (Developers, PMs/POs, QAs) to achieve high-quality outcomes.Maintain high programming standards and a swift delivery pace, both individually and as a team.

Jul 18, 2025
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Box Inc. logo
Full-time|On-site|Warsaw, Poland

About Box:Box (NYSE:BOX) stands at the forefront of Intelligent Content Management, creating an environment where organizations can enhance collaboration, oversee the entire content lifecycle, safeguard vital information, and revolutionize business workflows using enterprise AI. Established in 2005, Box simplifies operations for prominent global enterprises such as JLL, Morgan Stanley, and Nationwide. Our headquarters are located in Redwood City, California, with a presence across the United States, Europe, and Asia.By joining Box, you will play a pivotal role in propelling our platform into the future. Content is the heartbeat of business operations, encompassing countless files and information exchanged among teams and departments daily—ranging from contracts and invoices to employee records and product specifications. Our mission is to infuse intelligence into content management, enabling clients to reshape workflows throughout their organizations. With the fusion of AI and enterprise content, this is an unprecedented opportunity to redefine collaborative work, and at Box, you will be at the forefront of this transformation.As an AI-first company, we expect you to adopt a growth-oriented mindset and explore innovative ways to harness AI for quicker, more informed decision-making that amplifies your impact at Box.Why We Need You:Numerous leading enterprises depend on Box for secure content storage, and we are unlocking the potential of their data by developing essential capabilities such as Box Relay. We are enhancing Relay with new features and supporting products.Our Relay Experience team in Poland is dedicated to delighting users by automating routine tasks, thereby saving time and ensuring consistent results. As our team expands and embarks on new product development, we seek an experienced engineer capable of owning significant system components and working independently. In this capacity, your contributions will impact millions of users who utilize Relay to accomplish their daily tasks.Your Responsibilities:Draft detailed specifications and documentation for software projects.Plan and execute effectively...

Apr 9, 2026
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Sigma Software Group logo
Full-time|On-site|Warsaw

Role Overview Sigma Software Group is seeking a Lead Principal Software Engineer with a focus on Interior Design software. This position is based in Warsaw. The role centers on leading software development efforts that improve both the user experience and the core functionality of interior design applications. What You Will Do Guide and oversee software projects aimed at enhancing interior design tools. Collaborate with cross-functional teams to define technical requirements and deliver high-quality solutions. Ensure development meets rigorous quality standards throughout the project lifecycle. Mentor junior engineers and encourage adoption of best practices within the team. Shape the technological direction of projects, influencing how designers interact with and benefit from Sigma Software Group’s products. Impact Your leadership will help designers create visually impressive and efficient spaces. The solutions developed will support both ease of use and strong functionality for end users.

Apr 15, 2026
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altersolutions logo
Full-time|On-site|Warsaw

We are seeking an experienced Senior Backend Engineer to become a vital member of our dynamic, cross-functional product teams. This role demands extensive technical expertise, exceptional communication abilities, and a proactive, collaborative approach. The successful candidate will be deeply involved in ongoing client projects and seamlessly integrated into our established workflows.

Nov 14, 2025

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