Tech Lead / Senior Golang Developer for Payments and Billing Systems

Join our dynamic team at Aghanim as a Tech Lead/Senior Golang Developer, where you will spearhead the design and development of robust backend services tailored for billing and payment processing systems.This pivotal role demands extensive expertise in Go backend architecture, paired with hands-on experience in integrating with various payment providers and financial infrastructures.You will engage in crafting systems that manage payment processing, billing logic, provider integrations, and transaction workflows, ensuring the utmost reliability, scalability, and accuracy in all financial operations.

Aghanim is looking for a Senior Golang Backend Developer to help build and refine backend services that power billing and payment processing systems. This position is based in Lisbon. What You’ll Do Design and develop backend services focused on billing and payment flows Work with Go (Golang) as the primary backend language Integrate with a range of external payment providers and financial APIs Build and maintain systems that manage transactions, retries, reconciliation, and provider communications Implement and optimize billing logic and payment processing pipelines Emphasize reliability, accuracy, and observability in all financial operations Write maintainable, well-tested production code Monitor and troubleshoot payment and transaction workflows About the Role Develop scalable backend services using Golang Integrate seamlessly with multiple payment providers Ensure financial operations are reliable and accurate Handle transaction processing, including error handling and reconciliation Location This role is based in Lisbon.

Join inetum2 as a Senior Outsystems Developer and Tech Lead, where you will play a pivotal role in shaping innovative solutions and leading a dynamic team of developers. As an integral part of our Lisbon office, you will leverage your expertise in Outsystems to design and implement high-quality applications that meet our clients' needs.

Emma Sleep is hiring a Senior Backend Engineer with expertise in Golang to help shape the technology behind its global platform. This position is based in Lisbon and centers on developing and refining backend systems that keep Emma Sleep’s operations running smoothly. Key responsibilities Design, build, and maintain backend services using Golang Improve system performance and scalability Support the reliability and efficiency of Emma Sleep’s technology platform Location This role is located in Lisbon.

Join Xsolla as a Payment Business Development Manager for Europe, where you will play a pivotal role in expanding our payment solutions across the region. In this dynamic position, you will be responsible for building and nurturing relationships with partners, identifying new business opportunities, and driving strategic initiatives to enhance our service offerings.As a part of our team, you will leverage your expertise in payments to develop strategies that align with our company's goals and the evolving needs of our clients. You will work closely with cross-functional teams to ensure seamless integration and delivery of our payment solutions.

Location: Fully Remote - NYC preferred. Open to US remote or EU remote (Must be able to overlap with EST 6+ hours daily)Employment Type: Full-timeCompensation: $200,000 - $275,000Join an exciting opportunity with our client, a pioneering leader in the blockchain industry, as a Senior Golang Engineer on their core backend team. They have developed an innovative real-time parimutuel prediction market platform on Solana, designed to seamlessly integrate rapid 60-second to 30-minute prediction markets into both livestream environments and web platforms.After successfully raising a $1M pre-seed round in April 2026, led by key venture players in the Solana ecosystem, they are expanding their infrastructure to accommodate high-concurrency traffic patterns. As one of the initial backend engineering hires, you will take ownership of essential systems that facilitate market creation, settlement, and automated payouts during high-stakes global livestream events.Key Responsibilities:System Ownership: Architect, develop, and sustain production-grade, low-latency backend systems capable of managing thousands of concurrent market resolutions.Concurrency & Performance: Implement advanced Go concurrency patterns to handle real-time data flows and high-frequency transaction processing.Infrastructure & Scaling: Oversee and optimize distributed systems, ensuring idempotency, consistent ordering guarantees, and robust failure recovery.Observability: Spearhead production debugging initiatives using logs, metrics, tracing, and profiling to ensure 24/7 system reliability.Technical Autonomy: Operate independently in a dynamic startup environment, influencing the foundational architecture of an emerging product category.

Role overview Speechify is hiring a Tech Lead in Lisbon to manage the Web Core Product and Chrome Extension. This position centers on leading a team of developers, shaping the technical direction, and maintaining a high standard for user experience and feature reliability. What you will do Guide and support a development team focused on the web core product and Chrome extension. Ensure features are reliable and user experiences meet high standards. Help define product direction in a competitive market. Requirements Strong technical background relevant to web products and browser extensions. Experience leading or mentoring developers. Ability to drive product quality and direction. Based in Lisbon, Portugal.

Role overview Speechify seeks a Tech Lead for the Android Core Product team in Lisbon, Portugal. This position centers on guiding Android app development with an emphasis on reliable performance and refined user experience. The Tech Lead provides direction and support to a talented group of developers. The team works to enhance current products and investigates new features for future releases. What you will do Lead the development of Android applications, ensuring strong performance and usability Support and mentor developers as they improve existing products Help the team explore and shape new product features Location This role is based in Lisbon, Portugal.

Why Choose VerifoneWith over three decades of excellence, Verifone has carved a prominent niche in the electronic payment technology sector. Recognized as a leading brand in electronic payment solutions, we are one of the largest global providers of electronic payment systems.At Verifone, our vibrant and diverse work environment fosters a results-driven culture where employees are empowered to excel. Collaborating with top retailers, merchants, banks, and partners worldwide, we are committed to delivering innovative payment solutions. Our obsession with excellence and customer satisfaction drives our team to lead the industry through ingenuity and an ambitious mindset. Whether it’s advancing secure payment systems or exploring new market opportunities, every Verifone employee is dedicated to the success of our customers and partners. This passion for innovation fuels personal and professional growth.We embrace an in-office culture, recognizing the immense benefits of co-location for career advancement and business outcomes. Currently, we offer a hybrid work schedule, with continual evaluations of our attendance policy.

Join Our Dynamic Team1GLOBAL is at the forefront of global mobile communications, providing innovative connectivity solutions tailored for both enterprises and consumers. Our cutting-edge telecom platform features an extensive in-house developed eSIM technology and a comprehensive array of telecom licenses, allowing us to operate as a fully regulated provider across 40 countries.We proudly serve numerous top-tier clients, including leading banks, enterprises, and digital-first businesses, enabling them to innovate confidently within the mobile ecosystem. With over 70 million connections globally, we empower our customers to launch and scale their telecommunications services effectively.1GLOBAL is a fast-growing, profitable venture with projected revenues exceeding US$200 million and profits surpassing US$25 million in the upcoming years. Our robust cash flow supports continuous investment in infrastructure, technological advancements, and global expansion.Founded in 2022 by industry veterans Hakan Koç and Pyrros Koussios, 1GLOBAL quickly established itself as a European technology leader, driving the future of telecommunications. Operating as a Mobile Virtual Network Operator (MVNO) in 12 countries and a regulated telecom operator in 28 markets, our headquarters in the Netherlands and R&D hubs in Lisbon, Berlin, and São Paulo host a talented team of nearly 500 experts across 15 countries, all dedicated to transforming global mobile connectivity.Be Part of Our Billing TeamAs a key member of our international team, you will play a crucial role in the development and enhancement of 1GLOBAL's billing system. We seek a skilled developer who is a team player, adept at designing and implementing new services, maintaining existing components, and thoroughly testing our applications.Ideal candidates will have a proven track record in bridging product and technology teams within product-led growth organizations. Join us in driving the Mediation and Billing solution's delivery and overseeing the complete life-cycle of our product offerings.

Join inetum2 as a Tech Lead specializing in Salesforce solutions, where you will lead a dynamic team dedicated to enhancing our clients' business processes through innovative technology. Your expertise in Salesforce will guide the development of tailored applications, ensuring high-quality results that meet client needs.

Join our dynamic Platform team as a Senior Python Backend Developer and take charge of the core backend systems that drive Aghanim, a pioneering direct-to-consumer (DTC) platform. Our mission is to empower mobile game developers to effectively monetize their products beyond traditional app stores. As a Merchant of Record, we manage payments, compliance, and tax obligations across over 200 territories while equipping game studios with cutting-edge tools for LiveOps automation, user segmentation, and community interaction.Our platform supports more than 100 live games through customizable Game Hubs (DTC web stores), in-game offers, subscription models, and virtual currency systems — all requiring robust real-money transaction capabilities with a focus on reliability and fraud prevention.You will be working with a sophisticated codebase that adheres to domain-driven design, encompassing over 60 business domains, strict code quality standards, and AI-assisted development processes. Our tech stack includes modern Python frameworks such as FastAPI, SQLAlchemy v2, PostgreSQL, and Redis, facilitating extensive integrations with game backends, payment gateways, and external services.

About SmartcatAt Smartcat, we are pioneering the future of work by integrating human expertise with advanced digital teammates, facilitating unprecedented productivity enhancements for top-tier global enterprises.We are at the forefront of a revolutionary category known as Agentic AI, allowing organizations to forge high-efficiency hybrid workforces composed of both skilled humans and intelligent AI agents. These AI companions are not generic assistants; they are adept digital coworkers that adapt by learning from your best talent, valuable content, and strategic business insights, ready to contribute from day one.Our platform is a seamless blend of generative AI, human-guided workflows, and a dynamic Enterprise Skill Graph that perpetually learns and evolves. Whether launching a product globally, onboarding team members, translating educational materials, or coordinating legal teams across different regions, Smartcat translates knowledge into actionable solutions and scalable outcomes.With over 1,000 organizations, including 20% of the Fortune 500, depending on Smartcat for their global business needs—swiftly and accurately, in every language—we are experiencing rapid growth as a Series C company with a remarkable 130% annual growth rate, committed to attracting individuals eager to shape the future of work alongside us.Join us on our mission to unlock global potential, one human and AI collaborator at a time.Founded in 2016, Smartcat has emerged as the essential language AI platform for global enterprises, aiding them in creating and managing multilingual content. Our client-focused language AI effortlessly translates content across various formats—from documents to videos, complex websites, and software—simplifying global operations for any corporate team. It also empowers users to generate new content by leveraging a multilingual enterprise library.Over 1,000 global companies, including 25% of the Fortune 500, trust Smartcat to broadcast their innovations and ideas worldwide.Our vision is to create a future where access to innovations and ideas is equitable for all.Supported by renowned investors such as Matrix Partners, FJ Labs, and other leading venture capital firms specializing in SaaS, marketplaces, and AI, Smartcat continues to thrive, achieving a 150% year-over-year growth despite economic challenges. We are well-funded and capital-efficient, offering a unique combination of a high-growth environment paired with long-term strategic planning.

About GoCardlessGoCardless is a pioneering global bank payment platform that empowers over 100,000 businesses, from innovative start-ups to established brands, to effortlessly manage their payments via direct debit, real-time transactions, and open banking solutions.With an impressive annual payment processing volume exceeding US$130 billion across more than 30 countries, we facilitate both one-off and recurring payments, eliminating the hassle of chasing payments while keeping costs low. Our cutting-edge AI-driven technologies enhance payment success rates and minimize the risk of fraud, while our open banking integrations with over 2,500 banks equip our customers with swift, informed decision-making capabilities.Headquartered in the UK with offices in London and Leeds, we also have a growing presence in Australia, France, Ireland, Latvia, Portugal, and the United States.At GoCardless, we prioritize supporting you! Our commitment to an inclusive and accessible hiring process is unwavering. Should you require additional support or adjustments, please reach out to your Talent Partner — we’re here for you!If you are excited about this opportunity, we encourage you to apply!Your RoleAs a Systems Engineer, your mission will be to enhance the technical and tooling capabilities of our front-line Operations teams, concentrating on optimizing and streamlining team efficiency. You will collaborate closely with Customer Operations, KYC and Compliance, and Internal Operations (Billing and Credit Control) to achieve these objectives.Our Technology StackWe are dedicated to crafting simple and dependable systems, leveraging the best technologies for each task. You will have the opportunity to work with tools such as Zendesk, Salesforce, Looker, Qualtrics, and Ruby to overcome any system limitations.While expertise in all these technologies is not a requirement, a willingness to learn and a solid foundation in other SaaS tools will be advantageous. If you possess a diverse skill set, we invite you to apply!

At Veeva Systems, we are dedicated to transforming the life sciences industry through innovative cloud solutions that accelerate the delivery of therapies to patients. As one of the fastest-growing SaaS companies globally, we achieved over $2 billion in revenue last year, with exciting prospects for future growth.Our core values of Doing the Right Thing, Customer Success, Employee Success, and Speed guide our operations. In 2021, we made headlines by becoming a public benefit corporation (PBC), which commits us to balancing the needs of our customers, employees, society, and investors.We embrace a Work Anywhere policy, allowing you the flexibility to work from home or in the office, fostering an environment where you can excel.Join us in revolutionizing the life sciences sector and making a positive difference for our clients, workforce, and communities.The RoleAs a Team Lead in our Data Operations division, you will oversee a remote team of over 50 freelancers engaged in rule-based web research. Your responsibilities will include designing and enhancing business processes as well as technological improvements.You will plan and monitor these processes, eliminating obstacles for your team to ensure smooth execution. Your primary objective will be to enhance process efficiency and minimize errors. In your capacity as a first-line manager and servant leader, you will be accountable for operational metrics and outcomes while keeping your team motivated and engaged.To succeed in this position, you must be highly driven with a proactive “can do” attitude. You should be results-oriented, analytical, organized, and possess strong interpersonal skills to facilitate effective communication with managers, analysts, and researchers.The ideal candidate will have a keen interest in people management, a process-driven mindset, and a strong work ethic.

Veeva Systems is a visionary leader in the industry cloud space, dedicated to accelerating the delivery of therapies from life sciences companies to patients. Having achieved remarkable growth as one of the fastest-growing SaaS companies, we exceeded $3 billion in revenue last fiscal year, with abundant opportunities for future expansion. Our core values drive us: Do the Right Thing, Customer Success, Employee Success, and Speed. As a trailblazer in our field, we proudly became a public benefit corporation (PBC) in 2021, committed to balancing the interests of our customers, employees, society, and investors. As a Work Anywhere company, we promote flexible working arrangements, allowing you to perform at your best in your preferred environment, whether at home or in the office. Join us as we transform the life sciences industry, enhancing the lives of our customers, employees, and communities.The RoleVeeva Link aims to create interconnected data applications that enhance research and improve patient outcomes. As a Senior Team Lead for one of our Data Operations teams, you will oversee a remote team of over 50 freelancers executing large-scale data generation pipelines. In this role, you will design and refine business processes while advocating for technology enhancements.Your responsibilities will include planning and managing these processes and removing obstacles for your team members. Your primary focus will be on enhancing process efficiency and minimizing defects. As a first-line manager and servant leader, you will deliver operational metrics linked to your processes and outcomes, all while maintaining high team engagement.To excel in this role, you should be highly motivated with a proactive attitude. You are results-driven, analytical, organized, and possess excellent interpersonal skills. Your communication with leadership, analysts, engineers, and researchers will be pivotal.The ideal candidate will have a passion for people management, a process-oriented mindset, and a strong work ethic. Whether you work from home or in our offices, you will thrive in an autonomous and international atmosphere. We take pride in our robust remote working culture where individuals are empowered to excel.

inetum2 is seeking a Billing & Finance Consultant based in Lisbon. The position centers on refining billing processes and providing support for financial operations throughout the company. Key responsibilities Collaborate with various teams to improve financial workflows and billing procedures Maintain accurate invoicing and ensure timely payment processing Assist with the preparation of financial reports Spot areas where current processes can be improved Take part in broader financial projects and initiatives Requirements Background in finance and billing systems Keen attention to detail Comfort working with colleagues from different departments

Join our innovative team at Inetum2 as a Senior Fullstack Mobile Developer. In this role, you will be responsible for designing, developing, and maintaining high-quality mobile applications across various platforms. You will work closely with our product managers and designers to create user-friendly experiences that delight our customers. Your expertise will guide the technical direction of our projects, ensuring best practices in software design and agile methodologies.

Join a pioneering global technology leader that empowers enterprises to transform their operations for the digital era. With a legacy of four decades of innovation, our cutting-edge technology solutions span across Digital, IoT, Cloud, Automation, Cybersecurity, Analytics, Infrastructure Management, Engineering, and more. Recognized globally, we have been awarded as a Top Employer by Forbes and in 17 countries, underscoring our commitment to excellence.We are currently seeking a Senior Java Developer to contribute to an exciting project in collaboration with a renowned FinTech service provider. This position offers a hybrid work model based in Lisbon, Portugal.Your responsibilities will include: Developing high-quality Enterprise Applications on time and within budget; Assisting the Lead Engineer with low-level design tasks; Providing accurate estimates for assigned tasks; Writing and executing Unit and Integration test cases; Reporting on task status accurately; Conducting peer reviews and mentoring junior developers; Participating in organization-wide process improvements and knowledge sharing.

As a Senior Front-End Developer at Cross Border Talents, you will: Develop intricate software solutions from the ground up using JavaScript/TypeScript and cutting-edge libraries; Balance both technical and interpersonal aspects of projects; Utilize your proficiency in React or Vue, along with automated testing and deployment; Occasionally venture beyond the browser, such as by establishing basic CI pipelines; Create simple HTML snippets enhanced with JavaScript, hosted on platforms like Netlify when it’s the most efficient solution.