Senior Full Stack Engineer – Platform

At Samba TV, we redefine the global viewing experience through our innovative data and technology that tracks streaming and broadcast video worldwide. Join us on our mission to revolutionize how audiences connect with media, enhancing the engagement between viewers and advertisers through actionable insights derived from our vast data pools.We invite a passionate Full Stack Software Engineer to join our dynamic core team in Warsaw, Poland. In this pivotal role, you will be responsible for developing and refining our core systems, including those being re-engineered to leverage cutting-edge Large Language Models (LLMs). You will work on intricate, large-scale systems that analyze audio and data signals from hundreds of channels globally and various streaming platforms, enabling effortless extraction of valuable insights.

At CreatorIQ, we are revolutionizing the way brands engage with creators, trusted by over 1,300 global brands and agencies. Our mission is to humanize businesses and amplify human impact. We embody our core values: intentionality, excellence, collaboration, and kindness.Recognized as one of the best companies to work for by BuiltIn LA and NY, we have also been named a Fastest-Growing Company in North America by Deloitte Technology Fast 500™ for four consecutive years. Our accolades include being recognized as a leader in IDC MarketScape: Worldwide Influencer Marketing Platforms for Large Enterprises in 2025, and achieving high ratings from G2 and Influencer MarketingHub.Join us in our flexible work environment that promotes both in-person and remote collaboration, fostering innovation and accommodating diverse work styles.Position OverviewWe are on the lookout for a Senior Full Stack Developer to contribute to our exciting new project, Gifting. This innovative solution allows brands to send products to creators seamlessly, manage fulfillment, and track outcomes, propelling the future of creator commerce.In this high-impact role, you will work across the entire technology stack to design and build scalable systems from scratch. Collaborating closely with product and design teams, you will define the architecture, deliver quickly, and enhance a completely new user experience.Technical StackFrontend: React, TypeScript, JoyUI/MUIBackend: Python (Django), Node.js (TypeScript)Infrastructure: AWS (Lambda, EC2)Key Responsibilities:Lead end-to-end feature development across both frontend and backend (equal contribution)Contribute to the architecture and design of our greenfield product, influencing technical direction from the outsetCreate scalable APIs and services leveraging Django and Node.jsDevelop user-friendly, high-performance interfaces with React and modern component libraries

Join the dynamic team at altersolutions as a Full-Stack Developer. In this role, you will be responsible for designing and implementing robust web applications. You will work closely with cross-functional teams to create streamlined solutions and ensure optimal user experience.

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!

Join Our Team!We are on the lookout for a highly skilled Senior Full Stack Software Engineer to be a pivotal part of our innovative teams in Warsaw. At Bolt, our engineering teams tackle unique product challenges that involve sophisticated algorithms for demand forecasting, real-time pricing optimization, routing logistics, fraud detection, and distributed systems, among others.About UsWith a customer base exceeding 200 million across more than 50 countries, Bolt stands as one of the fastest-growing tech firms in Europe and Africa. This remarkable growth is a testament to the dedication and talent of our team members.We foster an inclusive culture where every individual is valued, regardless of race, color, religion, gender identity, sexual orientation, national origin, age, or disability. Our ultimate aim is to create urban environments that prioritize people over vehicles, and we would love for you to help us realize this vision!

Waymo, the leader in autonomous driving technology, is dedicated to becoming the world's most trusted driver. Originating from the Google Self-Driving Car Project in 2009, our focus has been on developing the Waymo Driver—The World’s Most Experienced Driver™. Our mission is to enhance mobility access and significantly reduce traffic-related fatalities. The Waymo Driver currently powers our fully autonomous ride-hail service, having successfully completed over ten million rider-only trips, utilizing its extensive experience from more than 100 million miles driven on public roads and tens of billions of miles in simulation across 15+ states in the U.S.Are you ready to shape the future of transportation with cutting-edge infrastructure for driverless cars?Join our Waymo Simulation team and contribute to the development of groundbreaking systems that will enhance our core simulation capabilities. We are searching for a dedicated Senior Software Engineer who is passionate about creating impactful solutions.

As a Senior Software Engineer focusing on AI Retrieval at Asana, you will play a pivotal role in designing and implementing cutting-edge solutions that enhance our AI capabilities. You will collaborate with cross-functional teams to build scalable systems that improve information retrieval and user experience. Your expertise in software engineering and artificial intelligence will help drive innovation and set new standards for efficiency and performance.

Join Universe Group, the innovators behind an ambitious AI-first web product in the visual content generation and editing space. As we transition into a phase of rapid scaling, we are on the lookout for a talented Full-Stack Developer to tackle architectural challenges and implement cutting-edge technologies into our product.Your future team includes: CEO, Full Stack Developer, Product Designer, PPC Specialist, Growth Product Manager, Product Manager, Data Analyst.Technology stack you will work with: React.js, Node.js, Nest.js, TypeScript, Redux, PostgreSQL, MongoDB, Redis, AWS, Kubernetes.Why you should join us:Collaborate closely with Ruslan — an experienced CEO with a proven track record. His previous startup, Eventmate, quadrupled its revenue within a year, secured $150K in investments (including from Google), and expanded into international markets including Europe and Brazil.Impact on business development — As a core team member, you will play an essential role in shaping the product while delving into architectural solutions and integrating the latest technologies into a product built from the ground up.A team of like-minded professionals — You will work alongside motivated individuals who support one another. We closely collaborate with technical teams across other businesses within the Universe Group, sharing insights and expertise.Opportunities for professional and career growth. We believe that the success of our business depends on the motivation and potential of each team member, so we continually invest in learning and development. You will also have the chance to advance to the Tech Lead position and contribute to team expansion and mentorship of junior specialists.Your future tasks will include:Defining and developing the product architecture, including technology selection, project structuring, and building scalable infrastructure to support a large number of users.Developing and maintaining...

Join Saily, where we simplify connectivity for travelers by eliminating roaming fees and plastic SIM cards, providing secure mobile data at over 200 destinations. With millions of paying customers and countless travelers accessing our services, your contributions will truly matter.We embrace an AI-native Product Engineering culture, where:The Engineer is a builder, tackling customer challenges from concept to implementation.AI Agents assist in coding and automating repetitive tasks, enabling Engineers to focus on impactful work.Everyone is encouraged to identify improvement opportunities and implement solutions.Curiosity and knowledge sharing are core to our team dynamics.Our ultimate goal is to ensure a comfortable and hassle-free journey for our customers.At Saily, we prioritize growth over comfort, contribution over hierarchy, and impact over process. We empower talented individuals with context, autonomy, and AI to enhance their productivity.We are excited to welcome motivated junior engineers to our team. Here, your impact is defined not by years of experience, but by your passion for learning, discipline, and innovative thinking. You'll have the opportunity to shape your environment, and Saily will provide the platform for you to do just that.Expect hands-on experience with AI-driven software development, full access to learning resources tailored to your growth, and the chance to work on a successful and technically challenging product that you will be proud to build.Bring your skills and vision, and become part of the Saily journey!

About Saily Saily, part of nordsec, helps travelers stay connected without roaming fees or physical SIM cards. Our platform delivers fast, secure mobile data in more than 200 destinations. With millions of paying users and hundreds of thousands online at any moment, we focus on making travel easier and more enjoyable. Our Product Engineering Culture Engineers own the entire product lifecycle, from initial concept through deployment. AI tools support coding and automate repetitive work, so engineers can focus on meaningful problems. Team members regularly suggest, discuss, and implement improvements together. We value curiosity, ongoing learning, and sharing knowledge across the team. Our main goal is to keep the travel experience smooth and stress-free for our users. We put growth ahead of comfort, impact above process, and contribution before hierarchy. Saily provides context, autonomy, and AI-driven tools to help people do their best work. About the Internship This is a 3-month, full-time paid internship based in Warsaw. Trainee Engineers work with experienced team members from day one, tackling real product challenges and building practical skills. Guidance is available, but interns are encouraged to take ownership and grow into their responsibilities. We use AI as a standard part of our workflow and emphasize strong engineering habits from the start. Outstanding interns may receive an offer for a full-time position at the end of the program. Who We’re Looking For Clear thinkers who learn quickly and take responsibility for their work Curious, self-disciplined individuals ready to contribute in a collaborative setting People eager for hands-on experience with real products, not just theoretical tasks If this sounds like the right fit, apply now to join the Saily team in Warsaw.

Join our vibrant team at Capital, a premier trading platform that is ambitiously expanding its reach globally. Recognized for our award-winning products, we pride ourselves on leveraging cutting-edge technology to provide an unparalleled client experience. We are constantly seeking exceptional talent to help us maintain our high standards of quality.We are currently on the lookout for a skilled QA Engineer with a strong background in both manual and automated testing. If you thrive in a fast-paced environment and enjoy collaborative teamwork, we invite you to contribute to the excellence of Capital.com’s trading platform.

Join our dynamic team at Talan as a Senior Full Stack Developer! In this role, you will leverage your expertise in both front-end and back-end technologies to create innovative solutions for our clients. You will collaborate with cross-functional teams to design, develop, and deploy applications that meet business requirements and enhance user experiences.Your proactive approach and commitment to quality will be essential as you tackle complex challenges in a fast-paced environment. If you are passionate about technology and eager to make a significant impact, we want to hear from you!

Join our dynamic team at Nordsec as a Senior Full Stack Product Engineer. In this role, you will leverage your expertise across the stack to design, develop, and deploy cutting-edge solutions that enhance user experiences and drive business success. You will work collaboratively with cross-functional teams to bring innovative product features to life.

Join our team as a Senior Full Stack Engineer and contribute to cutting-edge projects that push the boundaries of technology. You will work in a collaborative environment, utilizing your expertise in both front-end and back-end development. We're looking for someone who is not only technically proficient but also passionate about delivering high-quality solutions.

Role overview Sigma Software Group seeks a Principal Full-Stack Engineer with deep frontend expertise for its Warsaw office. The position involves designing and building web applications that put user experience at the center. Collaboration is essential, as the role works closely with colleagues from different disciplines to ensure software solutions meet client expectations. What you will do Design and implement web applications with a strong emphasis on frontend quality and usability Collaborate with cross-functional teams to deliver reliable, high-quality software Lead technical projects and set direction for development efforts Mentor junior engineers and help shape team best practices Requirements Extensive experience in both frontend and backend development Demonstrated ability to lead projects and guide teams Proven track record of mentoring and supporting junior developers Strong commitment to building user-centric software This Warsaw-based role offers the opportunity to influence client projects and contribute to the growth of the team.

At Saily, we are revolutionizing the way people stay connected while traveling. With no roaming fees and no plastic SIM cards, we provide lightning-fast and secure mobile data across over 200 destinations. Our platform is trusted by millions of paying customers and frequented by hundreds of thousands of travelers daily.To deliver the best possible product, we have cultivated an AI-native Product Engineering culture that empowers:The Engineer as a builder, owning the customer problem-solving process from inception to production.AI Agents that assist by writing significant portions of code and automating repeatable tasks, enabling Engineers to amplify their contributions.A collaborative environment where everyone plays a role in enhancing Saily by proposing new areas for agent delegation and executing those improvements.A culture of curiosity, continuous learning, and knowledge sharing, ensuring that the customer experience, marked by comfort and connectivity, remains our primary focus.We prioritize growth over comfort, contribution over hierarchy, and impact over process. At Saily, we trust in giving talented individuals the context, autonomy, and AI tools they need to do their best work.We are excited to welcome motivated junior engineers to our team because we believe that true impact is not defined by years of experience, but rather by your eagerness to learn, discipline, and innovative mindset. Saily offers you the space to shape and enhance your surroundings.What can you expect from us? You will gain hands-on experience in AI-assisted software development, access to various learning resources, and the chance to work on a successful, impactful, and technically stimulating product that you will be proud to build.Bring your skills, your vision, and join Saily!Main ResponsibilitiesContribute to delivering tools and features with guidance from the team.Collaborate effectively with product managers, designers, and fellow engineers.Work within small, independent teams.Learn to leverage AI agents for specifications, coding, analysis, testing, and iterative processes.Participate in enhancing our internal agent network and development workflows.Focus on achieving user and business outcomes rather than just output.

What is Box?Box (NYSE: BOX) stands at the forefront of Intelligent Content Management. Our innovative platform empowers organizations to enhance collaboration, oversee the entire content lifecycle, secure vital information, and revolutionize business workflows through enterprise AI. Established in 2005, Box simplifies operations for leading global entities like JLL, Morgan Stanley, and Nationwide. With headquarters in Redwood City, CA, and offices across the United States, Europe, and Asia, we are committed to helping companies thrive in the era of AI.Joining Box offers a unique opportunity to drive our platform's evolution. Content is the backbone of our work processes, encompassing the billions of files and pieces of information exchanged daily—contracts, invoices, employee records, financials, product specifications, marketing assets, and beyond. Our mission is to bring intelligence to content management, empowering our customers to transform workflows comprehensively. With the integration of AI and enterprise content, the potential for changing how organizations collaborate has never been greater, and at Box, you’ll be at the heart of this significant transition.About the Team:As a Lead Full-Stack Engineer on the Content Creation team, you will be a key player in the development of real-time applications within Box. This team is critical as it represents one of the first points of engagement for customers using our platform. Your contributions will shape the future of content generation within Box.The Content Creation team manages Box's Notes and Canvas products, delivering functionality utilized by our largest user groups, extending beyond just administrative users. This team operates as the sole true real-time service at Box, employing web sockets to facilitate real-time editing. It’s a complex area where we excel, making this a fantastic team to join if you want to impact one of Box's most essential products. The team primarily works with Front-End technologies like React.js, while Back-End tasks are predominantly handled with Node.js.Why Box Needs You?We are looking for you to be a transformative force in developing Box's Core Experiences as part of the broader Build organization, prioritizing value delivery alongside high-tech quality standards.

CreatorIQ develops an AI-native operating system that enables creator-led growth for more than 1,300 brands and agencies worldwide. The platform connects businesses with audiences through genuine creator partnerships. CreatorIQ has been recognized by BuiltIn LA and NY as a top workplace and was named a Leader in Influencer Marketing Solutions by The Forrester New Wave™. The company has also received multiple G2 awards, including Best Customer Relationship and Top 100 Fastest-Growing Products. The team values intentionality, excellence, collaboration, and humanity, and offers a flexible work model to accommodate different work styles. Role overview The Senior Full Stack Engineer (Creator Recruit) will join the Creator Tools team in Warsaw. This team is responsible for shaping the creator experience on the platform, including payments, social authentication, e-commerce, and campaign workflows. The role focuses on building scalable features and improving user experiences that directly impact creators who use CreatorIQ’s tools for their work and income. What you will do Design, build, and maintain features across the stack to create a seamless experience for creators Collaborate with product and design teams to deliver solutions that address real user needs Take ownership of projects from initial concept to deployment Contribute to architectural decisions and help define the technical direction of the Creator Tools platform Maintain high standards for code quality and long-term maintainability Requirements Extensive experience with modern frontend frameworks Strong background in backend development Proven ability to collaborate effectively within a team Comfort working in an environment where priorities and projects can change Impact This position offers the opportunity to make a clear difference for creators who depend on the platform to grow their businesses and support their livelihoods. The work will help shape the future of the creator economy.

About Us:Planner 5D serves as a leading global platform for home design, engaging over 100 million users across 230 territories, including two users from Antarctica each month! Our innovative software streamlines the home renovation journey from ideation to execution, making it simpler than ever. You don't need to be a design expert to transform your living or working space. We are committed to enhancing the design experience and making the dream of customizing homes accessible to everyone.Our platform is available across various devices, including Web, iOS, Android, Windows, and MacOS, ensuring seamless synchronization for our users. Planner 5D is not merely software; it is a vibrant community of passionate and product-driven professionals from diverse backgrounds, collaborating across time zones with a common ambition to transform the home design industry.We are continuously on the lookout for talented individuals who are eager to take initiative and drive innovation within our expanding suite of tools. Join us in shaping the future of home design.We seek a skilled Senior Full-Stack Developer to join our web team, focusing on developing new features and enhancing our existing solutions.Our Tech Stack: PHP 8.4, Symfony, PHPUnit, MySQL, Redis, MongoDB, RabbitMQ, Git, Docker for back-end development. For front-end development: native JavaScript, jQuery (legacy code), TypeScript, React, Three.js (OpenGL), Webpack, WebSocket, Jest (unit tests), Docker, SVG.Note: Candidates should be prepared to work as a Contractor under a B2B service agreement.