Senior Python Engineer (CX) at altersolutions | Warsaw

Location: Poland About Us: RTB House stands at the forefront of marketing technology, delivering cutting-edge solutions to leading brands and agencies around the globe. Our proprietary ad-buying engine is the world's first to utilize Deep Learning algorithms exclusively, empowering advertisers to achieve remarkable results at every stage of their marketing funnel. We are on the lookout for a Backend Python Developer to become an integral part of our internal team at RTB House. In this role, you will engage in the development of applications and tools that directly enhance our real-time bidding operations. Collaborating with seasoned engineers and product teams, this position offers a fantastic opportunity for developers eager to expand their skill set, tackle real-world challenges, and create robust software that makes a tangible impact.

Location: Poland About Us: RTB House is an innovative global leader in marketing technology, dedicated to developing cutting-edge solutions for esteemed brands and agencies around the globe. Our unique ad-buying engine, driven entirely by advanced Deep Learning algorithms, empowers advertisers to achieve remarkable results and meet their objectives across all stages of the marketing funnel. Since our inception in 2012, we have expanded our operations to over 90 markets while maintaining a steadfast commitment to first-party advertising and continuous innovation. RTB House provides comprehensive, Deep Learning-powered AdTech products and solutions designed to enhance conversion rates, drive customer acquisition, foster engagement, and stimulate long-term demand for a diverse clientele worldwide. Your Role: We are seeking a Senior Software Engineer to join our team in designing, developing, and fine-tuning high-performance backend systems that facilitate real-time bidding (RTB) and machine learning at scale. You will be instrumental in creating software that manages billions of daily transactions, ensuring adherence to stringent latency and reliability requirements within a distributed, low-latency environment.

Location: Poland About Us:RTB House is a pioneering global technology company specializing in innovative marketing solutions for leading brands and advertising agencies around the globe. Our proprietary ad-buying engine stands out as the first in the world to utilize Deep Learning algorithms entirely, empowering advertisers to achieve exceptional results and meet their objectives throughout every stage of the marketing funnel. Your Role:As a Senior Technical Researcher/Engineer on our AdTech Technical Research Team, you will be instrumental in investigating and mastering the latest advancements in the advertising technology landscape. Your responsibilities will include conducting comprehensive research, testing novel technologies, and collaborating across various teams to determine their viability for integration into our systems. This position requires a unique combination of programming, research, and analytical skills to assess the effectiveness and practicality of diverse ad tech solutions. Qualifications: Minimum of 5 years of experience in a research or engineering role. Technical Proficiency: Strong programming skills with the ability to comprehend large-scale and intricate systems and architectures. Curiosity and Willingness to Learn: Eagerness to embrace new challenges and technologies while continuously enhancing knowledge in the ad tech sector. Independence & Proactiveness: Capability to take initiative and make informed decisions with minimal oversight while upholding high standards. Goal-Oriented Mindset: Focused on achieving specific project objectives and adaptable in a fast-paced environment. Collaborative Communication: Proficient in effectively sharing knowledge and working alongside team members and external partners (e.g., major browser vendors, W3C, GitHub). Prototyping Skills: Ability to develop Proof of Concepts (PoCs) and experimental solutions to evaluate their effectiveness. Technologies & Projects You May Work With: Python, Java, Scala, TypeScript/JavaScript PyTorch, NumPy, Pandas Jupyter Notebooks BigQuery, GCP Browser Engines

About WPP MediaWPP is the creative transformation company, harnessing creativity to shape a brighter future for our people, planet, clients, and communities. For further details, visit wpp.com.WPP Media operates as WPP’s global media collective, where we unify the best platforms, talent, and partnerships to unlock boundless growth opportunities in an ever-evolving media landscape. Visit wppmedia.com for more information.At WPP Media, we value the strength of our culture and our people, which empowers us to provide exceptional experiences for our clients and each other. In this role, you will play a vital part in upholding WPP and WPP Media’s core values:Be Extraordinary by Leading Collectively to Inspire Transformational Creativity.Create an Open environment by Balancing People and Client Experiences while Cultivating Trust.Lead Optimistically by Championing Growth and Development to Mobilize the Enterprise.Role Summary and ImpactAs a key member of the Global Operations Centre (GOC), you will collaborate with diverse teams across the United States, Europe, and Asia to deliver impactful solutions in a vibrant, multicultural setting. We are on the lookout for a skilled Backend Engineer to join our Data & Technology Solutions team. In this role, you will be essential in designing, developing, and maintaining scalable backend systems that drive our innovative marketing technologies, including the WPP Open AI platform. If you are passionate about crafting high-performance APIs, engaging with large datasets, and shaping the future of AdTech, we would love to connect with you.

Join Larian Studios as a Backend Developer, where you'll play a pivotal role in creating immersive gaming experiences. We are looking for innovative thinkers passionate about backend technologies to help design and implement scalable systems that enhance our gaming platforms.

Company Overview:Twisto, a Param Company, is a forward-thinking financial services provider revolutionizing payment methods in Central and Eastern Europe. Our innovative app empowers users with complete control over their financial transactions, enabling them to defer or split purchases, share expenses, pay invoices, and shop using both virtual and physical cards. We are committed to providing transparency, convenience, and competitive exchange rates both locally and globally. Our mission is to continuously innovate and expand our offerings to simplify everyday financial tasks for our customers.Your Future Responsibilities:We are seeking a dedicated Python Engineer to join our dynamic team! In this role, you will collaborate with Engineering Managers, Product Analysts/Managers, and fellow engineers to enhance user stories, define requirements, and assist in prioritizing and executing tasks throughout the software development life cycle.Key Responsibilities:Design, develop, and maintain Python applications with an emphasis on writing clean, reliable, and maintainable code.Transform business requirements into viable technical solutions.Implement new features, conduct code reviews, provide technical support, and resolve bugs.Contribute to system architecture design and ensure that technical documentation remains current.Engage actively in code reviews and promote high engineering standards within the team.Effectively communicate with stakeholders and team members regarding technical solutions and project updates, both verbally and in writing.Our technology stack is constantly evolving, but currently includes the following tools: Languages: Python.Tools: Kubernetes, Terraform, Docker, AWS Cloud, Grafana, Firebase.Methodologies: Agile, Scrum; we operate on 14-day sprints, with stand-ups conducted online via Slack.

We are seeking a talented Python Developer to join our dynamic team at SoftwareMind in Warsaw. As a mid-senior level developer, you will be instrumental in designing and implementing innovative solutions that leverage Python technologies. You will collaborate with cross-functional teams to deliver high-quality software that meets our clients' needs.If you are passionate about software development and eager to work in a fast-paced environment, we want to hear from you!

Join HelloFresh in Warsaw as part of our HelloTech organization, a vital segment of our global technology team comprising over 1000 professionals. We are dedicated to developing digital products that enhance the end-to-end food experience, encompassing meal kits, ready-to-eat meals, and even specialty items like pet food and premium meat & seafood. Our technology platforms empower millions of customers with personalized food solutions every month.Our direct-to-consumer subscription model is fueled by cutting-edge technology that optimizes every customer interaction—from engaging applications and personalization algorithms to pricing strategies and supply chain management. Although our brands operate independently to cater to diverse customer needs, they are unified by shared platforms, data, and operational excellence crafted by HelloTech.At HelloTech, we work in autonomous, cross-functional teams that take ownership of specific products and domains. By collaborating with our Warsaw office, you will contribute to scalable, data-driven products used across various markets, leveraging a modern tech stack and working with international teams to continuously enhance how our customers discover, order, and enjoy HelloFresh products now and in the future.

softwaremind seeks a Senior Python Developer for its Warsaw office. This position centers on designing and building software solutions in Python, with a strong emphasis on teamwork and collaboration across different disciplines. The goal is to deliver applications that align with client needs and project objectives. Key responsibilities Develop and implement software solutions using Python Collaborate with cross-functional teams to deliver applications Mentor junior developers and share technical expertise Contribute to improvements in development processes and practices Requirements Extensive experience in Python programming Ability to work effectively with colleagues from diverse backgrounds Interest in mentoring and supporting less experienced team members Dedication to producing high-quality software Location This role is based in Warsaw.

Role overview SoftwareMind seeks a Python Developer with an infrastructure focus to support the systems behind core software products. The position centers on building and maintaining technical foundations that keep products reliable and integrations seamless. Collaboration is key in this role. You will work alongside teams from different parts of the company to ensure infrastructure remains strong and operations run without disruption. What you will do Develop and maintain infrastructure using Python Support systems that enable core product functionality Work with other teams to ensure smooth integrations Location This position is based in Warsaw.

Join our dynamic team at Evolution as a Backend Developer specializing in Scala. In this role, you will be responsible for designing, implementing, and maintaining high-performance backend systems that are scalable and robust. You will collaborate with cross-functional teams to deliver innovative solutions that meet our clients' needs.

Join MyDr, a pioneering team of technology enthusiasts dedicated to revolutionizing the healthcare sector. We develop sophisticated software solutions for Electronic Medical Documentation and holistic clinic management, bringing the Polish healthcare system into the modern age for both practitioners and patients.Our flagship solution, MyDr EDM, is trusted by over 10,000 clinics, including those partnering with the National Health Fund (NFZ). It delivers a comprehensive suite of functionalities that enhances daily operations in medical facilities—from advanced scheduling and essential appointment tools (e-prescriptions, e-referrals, and e-sick leaves) to cutting-edge telemedicine solutions and seamless integration with the government P1 Platform.Additionally, we proudly offer dr100, a specialized program tailored for dental practices, featuring unique tools such as interactive dental diagrams and dedicated modules for periodontal, prosthetic, and orthodontic needs.Since our founding in 2017, MyDr has established itself as a leader in cloud-based EDM solutions within Poland's medical software market, consistently innovating to meet the evolving needs of healthcare providers.

Join Euronet Worldwide, a leader in electronic payments and transaction processing, as a Financial Analyst. In this role, you will play a critical part in analyzing financial data, preparing reports, and supporting strategic decision-making processes. This is an exciting opportunity to contribute to the financial health of a dynamic and growing organization.

Join Altersolutions as a Python Developer and become a key player in our dynamic team. You will work with cutting-edge technology to develop robust and efficient applications that enhance our services. If you are passionate about coding and eager to tackle challenges, we want to hear from you!

Join Hostinger as a Pricing Manager and play a pivotal role in shaping our pricing strategies. You will work alongside a dynamic team to analyze market data, set competitive prices, and enhance our revenue models. Your insights will drive our pricing decisions, ensuring we remain competitive while maximizing profitability.

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.

Location: Warsaw, Poland — Hybrid (4 days on-site / 1 day remote)Contract: B2B · 25–40 k PLN net / month + RSUsFresha: Innovating the Beauty & Wellness SectorBecome a part of Fresha, the premier marketplace platform revolutionizing the beauty and wellness industry on a global scale. With a network of over 120,000 businesses and 450,000 stylists who trust our platform, we've facilitated more than 1 billion appointments worldwide. Fresha provides an integrated platform for bookings, point-of-sale, marketing, and more, connecting consumers with local services.Your Role as a Backend EngineerAt Fresha, we harness the power of AI not merely as a coding assistant, but as a catalyst for feature delivery. We equip every engineer with cutting-edge tools (Claude, GitHub Copilot, Cursor) to eliminate technical burdens—allowing you to dedicate your efforts to delivering high-impact product features. We seek engineers who can adeptly utilize these tools to propel our 6-week development cycles, accelerating the transition from concept to code, while ensuring the technical integrity and security of the final user experience.Are you poised to make a tangible impact in a dynamic, self-directed environment? We invite you to join our exceptional cross-functional product team in Warsaw as a Backend Engineer.Key Responsibilities:* Collaborate intimately with Product, Design, Frontend, Infrastructure, and Mobile engineers to transition features from discovery to deployment and beyond.* Take ownership of features from concept to observability: encompassing technical design, implementation, testing, and deployment.* Design, develop, and sustain efficient, scalable, and robust Ruby/Elixir code.* Work within a polyglot technology stack (Ruby, Elixir, GraphQL, TypeScript, gRPC) and modern messaging systems (Kafka).* Operate within a Kubernetes-driven framework as we progress towards a microservices architecture.* Apply Domain-Driven Design principles to build high-quality, impactful products from inception to delivery.

Join TechBiz Global, where we connect top talent with leading companies. We are currently in search of a Senior JavaScript Engineer to become a vital part of our client’s dynamic team in Warsaw. If you aspire to thrive in a cutting-edge environment and embrace growth, this opportunity is tailored for you.Role OverviewKey Responsibilities:Tackle essential problem domains crucial to our client’s objectives, with the flexibility to transition between teams as our fast-paced environment evolves.Leverage cloud solutions, especially AWS, to engineer, deploy, and enhance scalable services.Engage in the entire project lifecycle—from ideation and design to deployment and maintenance—ensuring timely and top-quality outcomes.Work collaboratively with diverse teams to synchronize integrations and enhance overall system architecture.Promote a robust engineering culture prioritizing code quality, best practices, innovation, and continuous improvement.Proactively identify, troubleshoot, and address potential challenges in distributed financial systems.Participate in small, autonomous teams with rapid release cycles, fostering a strong sense of ownership.Ideal Candidate:Demonstrates expertise in JavaScript, with substantial experience in backend development using Node.js (e.g., Express, NestJS, or similar frameworks).Possesses experience with PostgreSQL and has expertise in designing, architecting, and building reliable, scalable backend systems.Is proficient in working with cloud technologies, particularly AWS

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.