Senior Software Engineer I - Payment Processing Platform

Join Wise as a Senior Software Engineer I, where you will play a vital role in enhancing our payment processing platform. Collaborate with a talented team of engineers to develop innovative solutions that streamline financial transactions worldwide. Your expertise will contribute to the growth and efficiency of our systems, ensuring a seamless experience for users.

About Checkout.com Checkout.com powers online payments for major brands including eBay, ASOS, Klarna, Uber Eats, and Sony. Each time someone makes a digital purchase with these companies, Checkout.com works in the background to process the transaction smoothly. The company handles billions of transactions every year, helping businesses move money efficiently and securely. With nearly two decades of experience, Checkout.com has built a global payments network that aims to be invisible to end users but essential for merchants. The company’s reach spans 19 offices on six continents, with its headquarters in London. Team members work both remotely and onsite, united by a focus on performance and ongoing improvement. Role Overview: Engineer I, Payments Engineering Operations (Tallinn) Checkout.com’s software engineers develop technology that supports merchants in increasing payment acceptance, lowering processing costs, preventing fraud, and delivering smooth customer experiences. The team values curiosity, new ideas, and a strong engineering mindset. Collaboration is central, with engineers working across product lines to support a customer-first approach. This Technology Operations Engineer role is based in Tallinn. The position connects engineering teams with operational excellence, offering broad exposure to Checkout.com’s technology and business logic. The focus is on ensuring the reliability and ongoing improvement of core systems through a mix of data analysis, programming, and automation. Key Responsibilities Operational Excellence: Perform daily system health checks and manage technical tasks handed off from engineering to maintain system stability and smooth operations. Collaboration: Partner with engineering teams to implement improvements and solve operational issues. Data-Driven Insights: Analyze data to spot trends and optimize system performance.

At Veriff, we empower businesses to connect with trustworthy individuals online through our advanced identity verification technology. We verify over 10,000 government-issued documents from more than 190 countries, scaling our operations rapidly. This translates to millions of verified identities annually, ensuring online safety for countless users globally. We are committed to setting a new standard for trust on the internet.As a Senior Software Engineer, you will play a pivotal role beyond coding; you will design scalable architectures, mentor emerging engineers, and significantly impact our business performance. We seek innovative problem solvers to help us achieve our goals.The Platform Area addresses cross-domain business requirements via a unified platform infrastructure. The advancement of the Veriff Platform is essential to our sustained success. This platform enables us to swiftly adapt our technology to the fast-paced identity verification landscape while meeting the demands of our teams and clients for innovative solutions. The Veriff platform presents numerous technical challenges and opportunities for scalability, which are critical to maintaining our leadership in the industry.

Join Wise as the Head of Payment Operations for Global Platforms, where you will lead our payment strategy and operations across diverse markets. You will be responsible for optimizing payment processes, enhancing user experience, and ensuring compliance with regulations. Your leadership will drive innovation and efficiency in our payment systems, contributing to our mission of making international money transfers instant, easy, and affordable.

Role overview Wise is seeking a Senior Product Engineer in Tallinn to focus on the Rules Platform. This position involves designing, building, and maintaining software that supports Wise's products and shapes how users interact with them. The work aims to strengthen the platform and improve the overall product experience. What you will do Develop and maintain software solutions for the Rules Platform Collaborate with cross-functional teams to deliver improvements and introduce new features Optimize systems to enhance user experience Share ideas and technical expertise to help guide the evolution of the technology stack What we value Creative approaches to solving technical challenges Strong collaboration across teams and disciplines Dedication to maintaining high standards in software quality

Join our innovative Engineering team at Veriff, where we are addressing the online identity crisis with cutting-edge solutions. As a Senior Software Engineer on our Data Platform team, you will play a pivotal role in managing our database infrastructure while ensuring the performance and reliability of our systems. Collaborate with a passionate team to develop tools that enhance the experience of Software Engineers interacting with our database platform. Your expertise will be crucial in navigating the complex challenges of our fast-paced market. Your impact will include:Enhancing and maintaining our database infrastructure management tools primarily using Python.Contributing to the development of background processing infrastructure.Improving database deployment tools to streamline operations.Ensuring an excellent developer experience for all database users.Guaranteeing the scalability and reliability of our data architecture.Writing Terraform modules and configuring infrastructure.Participating in on-call shifts to support our systems.You are the ideal candidate if you possess:Proficiency in Python.Experience with cloud infrastructure, ideally AWS.Networking expertise.Familiarity with Terraform.Experience with large databases, especially PostgreSQL, and complex replication patterns.Fluency in English, both written and spoken.Additional qualifications that will make you stand out:Experience with Ansible and/or Database CI.

The Machine Learning (ML) Platform team at Veriff is at the forefront of creating a robust foundation for the rapid and compliant development of machine learning products. We deliver scalable, observable, and user-friendly systems that are essential for managing data, training models, evaluating performance, and deploying models on a large scale.Having laid the groundwork with our core platform capabilities, we are now poised for significant growth, emphasizing systemic excellence. Our focus includes institutionalizing world-class observability, maximizing cost efficiency, and accelerating our experimentation processes. In this role, you will play a crucial part in aligning our architectural vision with a seamless developer experience for our data science teams.Your Contributions will Drive ML Innovation by:Implementing Observability Frameworks: Crafting tools and templates that enhance visibility into model performance, data drift, and training metrics, ensuring our continuous retraining processes are robust.Engineering for Efficiency: Designing systems to monitor and optimize computing costs and training performance, enabling sustainable scaling of our ML initiatives.Building Experimentation Tooling: Executing the roadmap for internal tools that empower Data Scientists and ML Engineers to iterate and deploy experiments with ease.Developing SaaS-grade ML Services: Writing high-quality, maintainable Python code to construct and automate services integral to our ML lifecycle.Bridge-Building: Collaborating with our Staff Engineer to execute architectural designs and partnering with SRE/DevXP teams to ensure our solutions are production-ready and manageable.

Join Wise as a Senior Software Engineer I in our Fincrime Requests team, where you'll play a crucial role in building and enhancing our systems to combat financial crime. You will work collaboratively with cross-functional teams to deliver innovative solutions, ensuring compliance with regulatory requirements while maintaining a seamless user experience.

Lightspark is revolutionizing the global payment landscape by developing an open payment protocol for the Internet, enabling money to transfer as quickly and easily as data. Through our innovative enterprise tools such as Grid, Node, and Spark, businesses can facilitate instantaneous, secure money transactions at a significantly reduced cost, from anywhere in the world.Headquartered in Los Angeles, California, Lightspark is committed to pioneering the future of payments by harnessing the potential of the Bitcoin network and exploring the depths of the Lightning Network. Our mission is to create a secure and robust payment infrastructure that seamlessly connects traditional finance with cryptocurrency. This exciting role is part of Striga, a Lightspark company located in Tallinn, Estonia, where we are developing Lightspark's European payments platform to link fiat and crypto systems for efficient cross-border transactions.We are on the lookout for a Senior Fullstack Engineer who thrives in dynamic startup environments, relishes the challenge of rapid coding and deployment, and is eager to contribute to a culture of engineering excellence. As a key member of our Lightspark Payments Europe team, you will be responsible for designing, leading, and enhancing the user experience for our enterprise products, automating our Connect SDKs, and implementing new features for our APIs and websites.

Join Wise as a Senior Software Engineer I, where you will play a pivotal role in enhancing our Europe Risk and Controls team. You will leverage your expertise in software development to create robust solutions that safeguard our operations against financial risks. Collaborate with cross-functional teams to design, implement, and maintain high-quality software systems that meet industry standards and regulatory requirements.

Wise is looking for a Senior Software Engineer to help improve the Screening Engine in Tallinn. This role centers on building and refining systems that support effective, reliable screening processes. What you will do Work on software development projects that strengthen and streamline the Screening Engine Collaborate with colleagues from different disciplines to design and deliver solutions Focus on performance, reliability, and usability in every aspect of your work Who you are Experienced in software engineering, with a track record of building dependable systems Comfortable working across teams to solve complex problems Motivated to keep systems efficient and user-friendly This position is based in Tallinn and centers on Wise’s Screening Engine platform.

We are seeking an innovative Engineering Manager to spearhead our Payments User Experience (UX) team. In this role, you will influence the payment experiences of millions of users across multiple platforms, including Rider and Driver apps, Food delivery, Courier services, and Business solutions. You will be instrumental in creating a cohesive and high-quality payments UX platform, ensuring that transactions are seamless, intuitive, and trustworthy at scale.As an Engineering Manager, you will oversee a cross-functional engineering team that encompasses mobile (iOS, Android, React Native), web, and backend technologies. You will engage closely with architecture and critical technical decisions, defining how payment flows are developed and integrated within Bolt to build scalable solutions that function effortlessly across various platforms and use cases. Collaboration with product, design, and engineering teams across diverse verticals will be key to aligning on a unified strategy and ensuring consistent, high-quality payment experiences.

The Engineering team at Veriff is dedicated to developing the innovative software that addresses the online identity crisis effectively and at scale. As we navigate a fast-paced and challenging market, we are excited to invite a talented Senior Software Engineer to join our Customer Portal team. This essential team is responsible for building and maintaining a robust self-service platform utilized by thousands of SaaS and Enterprise clients. Our product empowers customers to seamlessly procure, manage, and control their identity verification services efficiently within their daily operations.In this pivotal role, you will collaborate closely with stakeholders to ensure an exceptional experience for our users. We are not just looking for an engineer; we seek a visionary leader ready to elevate the team and tackle challenges head-on. Join us in this thrilling journey!Your contributions will include:Architecting a Multi-Product Engine: Transitioning from a single-product tool to a self-service platform catering to 10+ services, developing billing and configuration logic that enables customers to launch without manual assistance.Balancing Enterprise & Scale: Resolving the challenges between custom requirements of large accounts and a high-volume self-serve funnel, designing abstractions to meet complex SLAs while maintaining platform performance.Modernizing while Shipping: Strategically overhauling legacy systems to keep our core infrastructure contemporary and ensuring new features are delivered effectively.Engineering Cross-Team Alignment: Coordinating with Identity, Fraud, and Trust teams to ensure architectural consistency and code quality across all products in the portal.Amplifying Delivery with AI: Leading the initiative to integrate AI-enhanced workflows, transforming ambitious goals into tangible outcomes.

As a Multicloud Platform Engineer at jobgether, the focus is on building and supporting cloud solutions that span several platforms. The role involves working closely with teams from different disciplines to design architectures that scale and perform reliably. Security and efficiency remain central to every project. What you will do Develop and maintain cloud infrastructure across multiple providers Collaborate with colleagues to design scalable, secure systems Apply best practices to ensure strong performance and safety in cloud deployments Integrate new technologies as part of the ongoing cloud strategy Who thrives in this role Engineers with experience in multicloud environments Those who enjoy working with cross-functional teams People who stay current with cloud technologies and best practices This position is based in Estonia and centers on delivering reliable, high-quality solutions for clients.

About Checkout.com Checkout.com supports online payments for global brands such as eBay, ASOS, Klarna, Uber Eats, and Sony. The company’s technology handles billions of transactions each year, helping businesses deliver smooth payment experiences for their customers. With 19 offices spanning six continents, Checkout.com operates on a global scale, while its roots remain in London. Role Overview: Software Engineer I Based in Tallinn, the Software Engineer I will contribute to projects that shape the future of digital payments. The role offers the chance to work across different teams and initiatives, adapting to changing business priorities and personal growth. This position is well-suited to engineers who enjoy new challenges and want to make an impact in fintech. What You Will Do Design, build, test, deploy, maintain, and improve software solutions Manage project priorities, schedules, and deliverables Work across the full technology stack as needed Contribute to projects that respond to evolving business needs Who We’re Looking For Adaptable engineers who are eager to take on new challenges Individuals who demonstrate leadership qualities Team members interested in growing within a global fintech company About the Team Checkout.com’s teams are collaborative and focused on continuous improvement. The company values performance and supports employees as they develop their careers in the fintech industry. Learn more about the company at Checkout.com.

Join wise as a Senior Business Process Manager and lead our initiatives in optimizing and streamlining business processes. In this pivotal role, you will collaborate with cross-functional teams to identify areas for improvement, implement innovative solutions, and drive efficiency across the organization.

Join our dynamic team as a Senior Full Stack Software Engineer in Tallinn. At Bolt, our engineering teams tackle exciting product challenges, including advanced algorithms for demand forecasting, optimal real-time pricing, routing, fraud detection, and the development of distributed systems, among others.As a Senior Full Stack Engineer, you will play a crucial role in architecting, designing, developing, and deploying both backend and frontend systems. Your expertise will primarily be applied through coding in Node.js and TypeScript, although prior experience with Node.js is not a requirement.

Join our innovative team at Wise as a Senior Software Engineer specializing in Finance Core Accounting. In this role, you will develop scalable and efficient software solutions that enhance our financial operations.Your contributions will directly impact how we manage our accounting processes, ensuring accuracy and compliance within a fast-paced environment.

About Speechify Speechify aims to remove barriers to reading and expand access to learning for people everywhere. Over 50 million users rely on our text-to-speech tools to turn PDFs, books, Google Docs, articles, and websites into audio. This helps users read more efficiently and remember more of what they learn. Our product lineup covers iOS, Android, Mac, a Chrome Extension, and a Web App. We are proud to have earned recognition as Chrome Extension of the Year from Google and to have received Apple’s 2025 Design Award for Inclusivity. Our Team Speechify’s team includes nearly 200 professionals around the world. We have no central office, our engineers, AI researchers, and other specialists collaborate remotely from many locations. Team members have backgrounds at Amazon, Microsoft, Google, Stanford, Stripe, Vercel, and other top organizations and startups.

Join Restream as a Senior Backend Software Engineer within our AI Clips Team, where you'll tackle intricate challenges while developing top-tier products. Your role involves crafting new features, designing innovative services, and enhancing the reliability of our systems as we expand our product offerings and grow our team. You appreciate the value of simplicity and dependability, carefully weighing the impact of each decision.Key ResponsibilitiesDevelop and sustain features in Restream's web services.Design and implement backend APIs and business logic for both new and existing features.Participate in code reviews, providing constructive feedback to team members.Stay informed about emerging technologies to identify opportunities for innovation.Ensure the redundancy and resilience of Restream's production infrastructure.Desired QualificationsA proactive, entrepreneurial mindset that drives high-quality project completion.Proficiency in at least one general-purpose programming language.Experience with Node.JS (TypeScript) or Rust is advantageous but not mandatory.Expertise in database design, particularly with relational and NoSQL databases (Scylla, Redis).Proven experience in creating, testing, consuming, and supporting APIs for web services.Comfortable working with AWS, Linux, Docker, Kubernetes, and a diverse tech stack.Basic front-end development skills are valued.Experience with modern front-end frameworks is a plus.Excellent written and verbal communication abilities.Self-motivated, analytical, and an effective team player.Founded in 2015 in Ukraine, Restream is driven by a passion for empowering creators to amplify their voices. As the leading multistreaming solution, we support over 10 million individuals worldwide in sharing their stories through live video. We believe that a small, focused team can make a significant impact in people's lives.