Role overview Affirm, Inc. is seeking a Software Engineer II to join the Merchant Data Platform team. This backend-focused position is fully remote and based in Poland. The role centers on developing systems that support merchant services and improve data access for businesses using the Affirm platform. What you will do Collaborate with cross-functional teams to design and build systems supporting merchant services. Develop backend features that enable businesses to access and utilize data more effectively. Contribute to projects aimed at enhancing interactions between merchants, users, and Affirm’s platform. Requirements Background in backend software engineering. Interest in building scalable and efficient systems for data platforms. Ability to work collaboratively with engineering, product, and business teams.

At Affirm, we are redefining credit to make it more transparent and consumer-friendly, empowering individuals with the ability to buy now and pay later without hidden fees or compounding interest.The Communications Platform team plays a pivotal role in managing essential services that contribute to the success and sustainability of our organization. We are responsible for facilitating transactional communications with our customers through email, SMS, and push notifications. Our services require meticulous attention to detail, proactive maintenance, and prompt response times to guarantee seamless operations.Our current high-priority initiatives involve modernizing our platform architecture, enhancing availability, and expanding our international reach. These efforts are crucial for our growth and competitiveness in the market and necessitate dedicated expertise and resources for effective execution. Insufficient capacity may lead to delays, decreased quality, and missed strategic opportunities; above all, our customers deserve timely and high-quality communications!

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.

Senior Software Engineer, Data Foundations ABOUT THE ROLE At Peloton, we view Data as a Product—a vital asset that drives every member interaction and influences business decisions. Our Datastores team is committed to offering a dependable, secure, and high-performing data persistence layer for application services throughout the organization. Our core principles include: 1. Safeguard the data, 2. Optimize for scalability, speed, and reliability, and 3. Minimize manual effort. We are seeking a Senior Software Engineer with extensive experience in constructing and managing data-intensive systems to join our Datastores team. This position is perfect for a backend engineer who has developed and maintained production systems heavily reliant on databases, caching layers, and data pipelines, and who is eager to advance their knowledge in scalable, cloud-native data infrastructures. You will collaborate at the intersection of application engineering and data platform reliability, working alongside service teams to enhance the storage, access, scalability, and observability of data across Peloton’s ecosystem. YOUR DAILY IMPACT AT PELOTON Your responsibilities will include: Designing, building, and maintaining backend systems that depend on scalable and highly available data persistence layers. Collaborating with service teams to refine database design, enhance query performance, and optimize data modeling. Contributing to automation efforts surrounding infrastructure provisioning using tools like Terraform and Backstage, while improving developer experience by creating self-service tools for databases and caching systems. Focusing on observability, performance insights, and autoscaling strategies for production datastores. Participating in architectural discussions regarding multi-regional data persistence and global scalability. This role merges hands-on backend engineering with significant exposure to cloud data systems and platform reliability challenges. WHAT YOU BRING We are looking for proficient backend engineers who are data-centric—those who have built systems where data performance, reliability, and modeling are crucial. 5+ years of software engineering experience in developing production backend systems. Strong familiarity with relational databases such as PostgreSQL or MySQL, including schema design, indexing, and query optimization. Experience with NoSQL datastores like DynamoDB, Redis, Elasticsearch, or Memcache. Exposure to data pipelines, event-driven architectures, and cloud technologies.

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.

Join our dynamic team at dev2 as a Senior Backend Software Engineer. In this critical role, you will design, develop, and maintain robust backend systems that empower our applications. You will work closely with cross-functional teams to ensure the seamless integration of user-facing elements with server-side logic. This is an exciting opportunity to contribute to cutting-edge projects in a collaborative environment.

Join Our Team as a Software Engineer!We are seeking a talented Software Engineer to become a key member of Bolt’s Data Platform Insights team. In this role, you will be responsible for developing and enhancing the platform that empowers Bolt teams to create and manage high-quality data products. Your contributions will ensure that data is both reliable and accessible, driving impactful decisions at a massive scale.About BoltWith more than 200 million customers across over 50 countries, Bolt stands as one of the fastest-growing tech companies in Europe and Africa. Our success is attributed to our dedicated team members, and we are committed to fostering an inclusive environment where every individual is welcomed, irrespective of race, color, religion, gender identity, sexual orientation, age, or disability.Our vision is to transform cities into spaces designed for people rather than vehicles. We need your expertise to help us achieve this mission!About the RoleAs a Software Engineer in the Insights team, you will play an essential role in shaping the data ecosystem at Bolt. You will deliver frameworks, libraries, and automations that facilitate the seamless building, testing, and deployment of thousands of data models, metrics, and BI reports. Collaborating closely with data producers, you will tackle their toughest challenges and develop scalable, elegant platform solutions. We are committed to solving complex engineering problems at scale, ensuring that Bolt’s data modeling ecosystem remains reliable, cost-effective, and high-performing.

Role overview Dropbox is hiring a Senior Backend Product Software Engineer to join the Payments team. The focus is on designing and building backend systems that power Dropbox’s payment platform. Work in this role shapes how users interact with payments and billing features. What you will do Design and build scalable backend solutions for payment processing Work closely with engineers, product managers, and other stakeholders to launch new features Prioritize reliability and efficiency across all payment systems Help drive improvements to the user experience around payments Location This is a remote role based in Poland.

People.ai is a cutting-edge AI-driven foundational data platform designed to empower businesses in achieving market success and growth. By delivering tailored solutions, we enhance pipeline visibility, provide actionable insights, and establish a single source of truth for all sales activities. People.ai boasts a unique dataset comprised of trillions of sales activities, millions of deals, 160 million business contacts, and holds 69 granted patents related to AI-driven business insights, differentiating us in the marketplace. Major corporations such as Verizon, Red Hat, and Palo Alto Networks trust our enterprise-ready, patented AI technology.At People.ai, we recognize the immense value that individuals bring to the world through their creativity, resourcefulness, and critical thinking. We strive to allow our team members to dedicate their time to impactful activities, thereby enhancing professional effectiveness. Our diverse and outspoken team comprises creative thinkers focused on driving transformation and growth. We celebrate diversity of thought and experience, encouraging non-traditional career paths and individuals who make processes their own.As a Senior Software Engineer within the XCore team, you will play a pivotal role in one of the most significant projects at People.ai — Forecasting. You will be responsible for developing and refining a live product that serves numerous daily users, collaborating closely with both business teams and clients through discovery and exploration calls. Your contributions will directly affect company revenue by defining and implementing features rooted in genuine customer feedback, thereby influencing how clients plan, forecast outcomes, and make critical business choices.Furthermore, you will engage in cross-functional collaboration with Engineering and R&D teams to enhance core Admin Platform services, including authentication, user management, settings, and configurations. By leveraging customer insights and data analytics, you will design and construct high-performance, low-latency systems and APIs that scale effectively while optimizing our operational costs.Ownership is a core value at People.ai, emphasizing the ability to shepherd ideas from conception to product launch. This principle resonates throughout our organization, particularly in engineering. As an engineer at People.ai, you will join a highly independent and autonomous team, contributing to the establishment of a robust data layer essential for our ongoing success.

Addepar is seeking a Senior Software Engineer to focus on Platform Services. This position centers on designing, building, and maintaining software systems that strengthen the platform's core features. Role overview As a Senior Software Engineer, the main responsibility is to improve and expand Addepar’s platform services. The role involves working with other teams across the company to ensure that solutions align with client needs and support ongoing growth. What you will do Design and implement software systems that support the platform’s capabilities Maintain and improve existing services to ensure reliability and performance Collaborate with cross-functional teams to deliver solutions for evolving client requirements Location This role is based in Poland.

Join ActiveCampaign as a Senior Data Software Engineer, where your expertise in high-quality software engineering will shape our data management landscape. In this pivotal role, you will architect advanced data systems and uphold stringent best practices to ensure our platforms are both resilient and scalable. Your responsibilities will encompass designing and developing the software necessary for seamless data movement and management across our organization.

Position: Senior Full-Stack Engineer (Data Platform & Tooling)Working Hours: 9am - 5pm Eastern Standard TimeMonthly Salary: Competitive and negotiable based on experienceJoin our dynamic team at lago-1 as a Senior Full-Stack Engineer, where you will play a pivotal role in the development of our cutting-edge data platform. As the ideal candidate, you will be instrumental in constructing reliable data pipelines from diverse external sources, collaborating closely with our talented team to deliver a solution that is not only fast and scalable but also genuinely impactful.If you thrive on the challenge of building complex products from the ground up and value the freedom of end-to-end project ownership, this opportunity is perfect for you!Key ResponsibilitiesDevelop and sustain both web and mobile iterations of the platform.Establish backend systems, APIs, and database architectures optimized for performance and scalability.Convert UI designs into responsive, high-quality implementations.Integrate with external tools and data sources.Oversee deployment, testing, and performance enhancements.Essential QualificationsMust-Have Skills:At least 5 years of experience in building production systems using Python.Expertise in SQL and database design, including schema design, query optimization, and data modeling.Proven experience with ETL and data pipelines.Strong web scraping skills, including browser automation, API reverse-engineering, anti-bot strategies, and rate limiting.Self-driven with a results-oriented mindset.Pragmatic coding approach, balancing clean code with timely deliverables.Open-mindedness and eagerness to learn new domains and adapt based on data insights.Experience working in small teams or startup environments (fewer than 20 people).Preferred QualificationsBackground in e-commerce or marketplace data (Amazon, Keepa, SP-API).Frontend skills for dashboards, internal tools, and reports.Experience with caching strategies, incremental data updates, and API token management.Familiarity with cloud deployment (AWS/GCP).A mindset focused on data validation and quality assurance.BenefitsFlexible Remote Work: Connect with a high-performing team from anywhere.Career Advancement: Enhance your skills in digital marketing and client management.Collaborative Culture: Work alongside passionate professionals who prioritize innovation and teamwork.We encourage all candidates to review and agree to Lago’s Confidentiality and Non-Circumvention Agreement, fostering a respectful and professional recruitment experience.

Role overview Renesas Electronics Corporation seeks a Senior Backend Software Engineer based in Wroclaw. The position centers on designing, developing, and optimizing backend systems that power a variety of advanced Renesas products. Contributions in this role have a direct effect on the reliability and performance of the company’s solutions. Key responsibilities Design and build backend systems supporting Renesas products Develop and enhance backend features to strengthen reliability and performance Collaborate with cross-functional teams to achieve project objectives Collaboration This position involves working closely with engineers and specialists from other areas. The goal is to deliver dependable systems that align with Renesas standards.

Join Renesas Electronics, a global leader in advanced semiconductor solutions, as a Senior Backend Software Engineer. In this pivotal role, you will design and develop innovative backend systems, contributing to the next generation of smart technology. Collaborate with cross-functional teams to deliver high-quality software solutions that meet customer needs.

At Affirm, we're on a mission to transform credit into a transparent and user-friendly experience, empowering consumers to make purchases now and pay later, all without hidden fees or compounding interest.We are seeking a passionate Senior Software Engineer to join our Furnishing Platform team. In this role, you will develop scalable systems and data pipelines that are critical to our consumer credit reporting. You will collaborate closely with our Product, Compliance, Servicing, and Credit teams to create reliable reporting systems that ensure the timely and accurate transmission of data from Affirm’s financial product offerings to Consumer Reporting Agencies.As Affirm experiences rapid growth, your work will be essential in scaling our products tenfold and beyond, helping us to fulfill our commitment to providing honest financial solutions that enhance lives.Join us as we embark on this exciting journey to establish a trusted and beloved financial services brand rooted in integrity. The adventure awaits!What You’ll DoOwn and deliver strategic outcomes: Lead the definition and execution of quarterly and long-term goals, ensuring alignment with company-wide objectives. Guide engineers through complexities and ambiguities, providing clarity and purpose.Shape architecture and technical strategy: Influence the design of large-scale data and backend systems across various teams, ensuring solutions are scalable, extensible, and adhere to engineering standards.Collaborate cross-functionally: Work with product, analytics, and design teams to define data-driven solutions. Proactively identify risks, communicate trade-offs, and ensure technical decisions support long-term product and business goals.Champion operational excellence: Guarantee the high availability and reliability of data pipelines and services by implementing robust monitoring, alerting, and recovery practices. Drive enhancements to minimize system fragility and operational demands.Mentor and grow talent: Support engineers within and outside your team through mentorship, code and design reviews, and technical leadership. Establish high standards for engineering practices and cultivate a culture of ownership and continuous improvement.Scale impact beyond your team: Write technical proposals, share best practices through documentation and tech talks, and advocate for enhancements that elevate the standards of the broader data engineering community.

About the TeamJoin the Sell Online Tribe, a dynamic group that empowers merchants to establish their presence online. We create innovative tools that enable millions of entrepreneurs, from barbers to bakers, to market their products and services effortlessly. Our core focus lies in the Online Store and Bookings products, which form the backbone of SumUp’s ecosystem, allowing merchants to manage appointments, highlight their offerings, and process payments—all from their mobile devices.We are a collaborative, cross-functional team of Product Managers, Designers, and Engineers dedicated to delivering exceptional mobile experiences. As a part of this team, you will play a crucial role in expanding into new sectors, bridging the gap between web and mobile, and making digital selling seamless for small businesses worldwide.About the RoleAs a Senior Backend Engineer, you will be instrumental in enhancing SumUp's major merchant-facing online products within the Bifrost team. You will contribute to the development and scaling of key products such as Payment Links, Virtual Terminal, and Unified Gift Cards, while also working on integration solutions that are vital for numerous other SumUp offerings.We are looking for a developer who prioritizes reliability, teamwork, and continuous growth. Your backend expertise will thrive in a high-impact environment where your contributions directly influence merchant success and team scalability.What You’ll DoEnsure scalability and continuous growth of high-priority online products at SumUpDrive the implementation, development, and integration of Online Checkouts across SumUpEngage actively in planning and review sessions at quarterly and sprint levels, providing constructive feedback and estimationsMonitor existing services, applying necessary fixes to maintain platform reliabilityDevelop new features with maintainable and testable codeEnhance application performance for scalabilityParticipate in code reviews to uphold high coding standardsYou Will Excel in This Role If:You have 5+ years of experience in backend engineering with GolangYou possess a robust understanding of fundamental system architecture, design principles, data modeling, and API designYou have substantial experience with distributed and fault-tolerant systemsYou have a passion for delivering high-quality software solutions

Asana is seeking a talented Senior Platform Reliability Engineer to join our dynamic team. In this pivotal role, you will utilize your strong software engineering expertise and profound understanding of system behavior under load and stress. You will take ownership of reliability as a core priority, developing foundational systems that ensure the protection and resilience of Asana's platform rather than merely reacting to failures. Your responsibilities will include creating essential platform systems such as load shedding, rate limiting, circuit breakers, and traffic controls, all aimed at safeguarding Asana during real-world operational demands. This is a significant role that influences the stability and performance of our entire infrastructure, allowing you to collaborate closely with various platform teams to embed reliability into our systems, rather than treating it as an afterthought. Our technology stack comprises: AWS, Kubernetes (EKS), CloudFront, Istio, Cilium, MySQL (RDS), OpenSearch, DynamoDB, Redis, Terraform, Datadog, TypeScript, Scala, Go, and Python. We understand that this list might sound like buzzword bingo, but we want to ensure that this position appears in your searches effectively. Why Join Us? Reliability as a Key Feature: You will develop systems that inherently make Asana resilient. Foundational Work: Manage critical elements like load shedding and traffic controls that underpin our platform. Collaborative Environment: Work alongside teams in Warsaw and Reykjavik, fostering collaboration without the hassle of timezone differences. Growth Opportunities: Be part of a new team and influence the direction of Platform Reliability Engineering at Asana. Success in this role means delivering systems that are relied upon by other teams by default, enhancing platform safety rather than merely fulfilling requirements. We are particularly interested in candidates who think like backend engineers, with a keen focus on failure modes, capacity planning, and developing systems that gracefully handle pressure. This position is based in our Warsaw office, with a hybrid work schedule that requires in-office attendance on Mondays, Tuesdays, and Thursdays. We offer a Contract of Employment (UoP) for our Polish employees.

Join our innovative team at dev2 as a Backend Software Engineer where you will play a crucial role in developing scalable backend solutions. Your expertise will help shape our technology stack and improve system performance. You will collaborate with cross-functional teams to design, implement, and maintain high-quality applications.

About the RoleJoin Logz.io as a Backend Software Engineer and be part of a dynamic team that is reshaping the observability landscape. In this role, you will design and develop robust backend systems that scale effectively, ensuring seamless integration and exceptional performance.Key ResponsibilitiesDevelop and maintain scalable backend services and APIs.Collaborate with cross-functional teams to define, design, and ship new features.Troubleshoot and optimize existing systems for performance and scalability.Participate in code reviews and contribute to team knowledge sharing.