Backend Software Engineer I

Are you passionate about building high-performance backend systems? Join Affirm as a Senior Backend Software Engineer, where you will play a critical role in developing our Merchant Data Platform for the EU market. In this remote position, you will work with a talented team to design, implement, and maintain scalable solutions that enhance the experience for our merchants.

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.

About Tripadvisor The Tripadvisor Group connects people to unforgettable experiences and aspires to be the world's most trusted source for travel advice. Leveraging our brands, technological innovations, and extensive capabilities, we connect our global audience with partners through engaging content, travel guidance, and comprehensive marketplaces for experiences, accommodations, restaurants, and various travel categories. Our portfolio includes well-known brands such as Tripadvisor, Viator, and TheFork. The Tripadvisor Experiences Engineering team, which operates across Europe, is responsible for our platform, mobile applications, and their supporting infrastructures. We manage systems that empower operators to grow their businesses while enabling third parties to utilize our inventory effectively. Moreover, we equip our customer service team with the tools necessary to deliver exceptional support to travelers and operators worldwide. We are seeking a Software Engineer II to join our rapidly expanding team. This role is open to candidates located within a reasonable commuting distance (generally within 1.5 hours) of our office hub in Kraków. While we advocate for flexible work arrangements, we also appreciate the value of meaningful in-person interactions for collaboration. Expect a predominantly remote work model, complemented by periodic in-person gatherings at your nearest office for team connection, strategic planning, or significant events. Within Tripadvisor Experiences, we cultivate a fun and collaborative environment focused on achieving results. Our engineers collaborate closely with product managers and designers, participating in the entire development process from software design to coding, testing, deployment, and iteration. Most of our engineers deploy code to production every few days, following a daily release cycle. Our engineers are adaptable and enjoy tackling diverse technical challenges. This position is primarily backend-focused, though you will occasionally engage in frontend projects. While a willingness to learn is essential, you do not need to be a frontend expert right away—training will be provided during onboarding, and frontend skills will not be assessed during interviews. Our technology stack includes Java, React, TypeScript, GraphQL, Kubernetes, SQL, and NoSQL databases, all hosted on AWS. You do not need to have experience with every technology listed, but a strong desire to learn is crucial. You should have experience in a statically typed, object-oriented language such as Java, C#, or C++.

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.

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.

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.

Are you an aspiring software engineer eager to kickstart your career in backend development? Join dev2, where you'll immerse yourself in innovative projects, collaborate with a dynamic team, and enhance your skill set in a supportive environment.Your role will involve designing and implementing robust backend systems, optimizing performance, and ensuring the security and scalability of applications. You will also have the opportunity to engage in code reviews and contribute to the overall architecture of our solutions.

Fandom is looking for a Software Engineer II focused on backend development with PHP to join the Wiki Platform team. This role is based in Poznań, with the option to work remotely from anywhere in Poland. The position reports to the Director of Engineering. Role overview This role centers on building and maintaining backend systems that support Fandom’s wiki platform, which serves 350 million fans and handles 4 billion page events each month. The work involves collaborating with cross-functional teams to plan, design, and develop scalable web applications and user experiences. What you will do Maintain and enhance the wiki platform built on PHP 8.3 and MediaWiki Work with a system supported by over 100 microservices written in Java and GoLang Focus on improving reliability, observability, stability, and fault resilience Develop and refine tools, services, and infrastructure components for internal teams Oversee the full lifecycle of features, from development to post-release maintenance Write maintainable, future-ready code that avoids unnecessary complexity Participate in development processes and team meetings Identify critical systems needing change and architectural issues to address Help shape the team’s roadmap and work across departments to resolve challenges Team and impact The Wiki Platform team prioritizes reliability and performance, handling both direct challenges and broader platform improvements. As a Software Engineer II, contributions will influence the strategic direction of the team and support large-scale projects across the company. To learn more about Fandom’s engineering culture, visit the team blog: https://medium.com/fandom-engineering

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.

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.

Project ObjectiveThe primary aim of this project is to gather comprehensive imagery of streets, key landmarks, and public spaces throughout EU countries. Utilizing vehicles equipped with 360-degree cameras, collectors will capture and store high-quality images of the surrounding environment. This valuable data will contribute to the enhancement of one of the world's most widely used online mapping services.Data collectors will follow designated routes through public streets and areas, focusing on vibrant commercial districts and historically significant sites. Due to potential adverse weather conditions, certain regions may require multiple visits to ensure the highest quality of imaging. The project is projected to last a minimum of three months and will span various city and state zones.The ideal candidate will possess a passion for driving, be familiar with local areas and traffic patterns, and demonstrate high levels of responsibility and dependability.The expected work schedule is from Monday to Friday, 8 hours per day, totaling 40 hours per week. Those interested in working additional hours are welcome to do so.

ABOUT THE ROLEJoin our dynamic team as a Backend Software Engineer dedicated to enhancing the e-commerce experience at Peloton. We seek an innovative engineer who is eager to develop scalable and high-performing backend services. Your contributions will help strengthen Peloton's online and retail presence, allowing our passionate community to engage with our products in exciting new ways. This role is pivotal in crafting the infrastructure that powers delightful interactions on our e-commerce platform.YOUR DAILY IMPACT AT PELOTONMaintain superior engineering standards to ensure our systems are reliable, performant, and scalable.Design and implement new backend features that enhance user experiences across Peloton’s offerings.Collaborate daily in an agile environment with engineers, designers, and product managers to realize our product strategy.Foster a positive and inclusive culture that prioritizes engineer growth and continuous learning.

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.

Welcome to PrimerAt Primer, we are pioneering the world's first unified payment infrastructure, empowering businesses globally to harness their payment capabilities. Our platform allows merchants to take charge of their payment stack, craft unique commerce experiences, accelerate their development timelines, and enhance payment success rates. We aim to simplify the complexities of payment processing, making it intuitive and user-friendly. Our vision to transform payments and commerce has attracted leading investors, including Accel, Balderton, Iconiq, and Tencent.Join us as we redefine the future of payments and commerce.Please note: We are currently unable to provide sponsorships or relocation packages.Your TeamYou will be a part of our Partners team, which is innovating how third-party payment service providers can leverage Primer’s unified payment infrastructure, creating a scalable and flexible platform for growth.Reporting directly to an Engineering Manager, you will collaborate with a diverse team of backend, full-stack, and frontend engineers, working closely with our Product team.Our team embraces a ‘you build it, you own it’ philosophy, engaging with infrastructure and overseeing their own testing and QA processes.Our technology stack includes: Python, Typescript, React, AWS, Kubernetes, and Terraform, among many other tools. Your RoleDevelop and implement core backend services designed for high performance in complex distributed systems.Utilize modern development methodologies, including Behavior-Driven Development (BDD) and Test-Driven Development (TDD).Write clear, modern, and thoroughly tested code.Collaborate effectively across teams in a product-driven atmosphere.Take responsibility for pivotal technology decisions, ensuring scalability and optimization.Conduct code reviews and seek continual improvement in our processes.Produce comprehensive internal documentation for your projects. Our Ideal CandidateProficient in Python coding within modern, complex technical environments.Familiarity with testing frameworks and a solid approach to writing testable, maintainable code.

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 our dynamic team at dev2 as a Lead Software Engineer specializing in backend development. You will play a pivotal role in designing and implementing robust, scalable, and high-performance software solutions. Your expertise will drive innovation and help shape the future of our products while mentoring junior engineers and collaborating with cross-functional teams.