Senior Fullstack QA Engineer [WFM] - Global Opportunity

Join Platacard as a Senior Fullstack QA Engineer (WFM) and play a pivotal role in ensuring the quality and reliability of our innovative solutions. As part of our global team, you will leverage your expertise in both frontend and backend testing, contributing to the development of cutting-edge applications.

Hostaway is a leading SaaS scale-up revolutionizing the vacation rental sector. Our innovative solutions and strategic partnerships with industry giants like Airbnb, VRBO, and Booking.com position us as frontrunners in this competitive landscape. We pride ourselves on our customer-centric values, consistently delivering exceptional results that foster growth, learning, and innovation for our team, clients, and the entire industry.As a profitable, high-growth company and the first PMS unicorn in the short-term rental space , this is an exciting time to join us! Discover more about our recent valuation and journey here.About the RoleWe are seeking a dedicated Staff FullStack Engineer focused on delivering our Trust Accounting white label solution. This role is pivotal in shaping the financial operations for our clients, ensuring compliance and effective fund management for property owners.You will be part of a new team tasked with designing and implementing a trustworthy financial subsystem that property managers can rely on, ensuring accuracy, compliance, and reliability. Your role will not only involve delivery but also in fostering a culture of correctness and accountability from the outset. This greenfield opportunity allows you to influence architecture, processes, and delivery from day one.Responsibilities:Lead the development of a greenfield MVP and architect the initial version of the productImplement a flexible, white-label React applicationDevelop a backend system to relay data to the white-label solution and internal databasesCreate a secure, scalable, and auditable trust accounting subsystem while maintaining high-quality standardsRefine early processes to enhance delivery speed, system reliability, and team autonomyCollaborate with team members to ensure product success and customer satisfaction

Platacard is looking for a Fullstack QA Engineer to help ensure the quality and reliability of Origination Web applications. This position plays a key role in shaping and executing testing processes, working closely with cross-functional teams to maintain high product standards. Role overview The Fullstack QA Engineer partners with engineers, product managers, and designers to keep web applications performing at their best. Daily work includes identifying, documenting, and resolving defects throughout the stack. The role also involves developing and refining testing strategies to support ongoing improvements in user experience and product reliability. What you will do Collaborate with engineering, product, and design teams to uphold quality standards for web applications Spot, track, and assist in resolving defects on both frontend and backend Create and implement effective testing strategies and processes Share ideas to enhance user experience and product stability Requirements Background in quality assurance for web applications Experience with both frontend and backend testing Keen attention to detail and a focus on process improvement Comfortable working with multidisciplinary teams Location This is a worldwide role. Platacard considers candidates from any location.

#PoweringYourIngenuity At Ekumenlabs, our mission is to connect world-class technology companies with exceptional engineering talent from every corner of the globe. With a strong presence in LATAM, the USA, and Europe, we empower businesses by assembling remote engineering teams tailored to each project's unique requirements.Our teams are driven by a passion for technology and are eager to tackle challenges head-on. We value technical expertise along with a commitment to continuous learning. Each development is customized to meet project needs, and our culture encourages the exploration of new languages, tools, and frameworks. Our software engineering teams prioritize best coding practices to ensure that our system designs and developments are readable, reusable, and scalable.We are currently seeking a talented and motivated Data Engineer to join our dynamic team. In this role, you will contribute to maintaining and enhancing a critical data ingestion pipeline that supports essential decision-making processes and ensures our teams work with reliable, high-quality data.You will collaborate closely with data scientists, engineers, and various stakeholders, ensuring smooth data flow, enhancing observability, and continuously seeking ways to improve efficiency.

Are you an experienced software engineer with a passion for Java and a deep understanding of infrastructure and systems? Join us in transforming how artificial intelligence comprehends large-scale software architectures. As AI models are increasingly utilized in enterprise settings, the need for expert guidance in performance, reliability, and cloud architecture is paramount. This is where your expertise comes into play. We are looking for Software Infrastructure Specialists who are fluent in Java and possess comprehensive knowledge in systems thinking, architectural design, performance engineering, and quality assurance. In this role, you'll engage with advanced AI models, addressing complex infrastructure scenarios that involve JVM-based services, distributed systems, cloud-native environments, and enterprise-grade architectures. You will also document the challenges these models face regarding correctness, scalability, and operational behavior. Your typical responsibilities will include engaging with the model on Java-focused infrastructure and platform engineering tasks, verifying architectural decisions concerning concurrency, latency, throughput, and resource utilization. You will assess testing strategies at both the infrastructure and application levels, analyze deployment and reliability risks, capture reproducible failure modes, and provide structured feedback to enhance model evaluation and reasoning frameworks. A bachelor's, master's, or PhD in computer science, software engineering, or a related field is preferred. Hands-on experience with enterprise Java systems, cloud infrastructure, platform engineering, or roles adjacent to Site Reliability Engineering (SRE) and DevOps is highly regarded. Exceptional written communication skills and the ability to clearly articulate system behaviors and design decisions are essential for this role. Are you ready to leverage your engineering skills to build the knowledge base for the AI of tomorrow? Apply now and become a part of the team that will shape future technology.

Become a Catalyst for Change in Digital Finance with TetherAt Tether, we are at the forefront of a financial revolution, not merely developing products but creating innovative solutions that empower businesses globally. Our state-of-the-art technology facilitates the seamless integration of reserve-backed tokens across various blockchains, enabling instant, secure, and cost-effective storage, transfer, and receipt of digital tokens.Innovate and Collaborate at TetherTether Finance: We offer the world’s most reliable stablecoin, USDT, trusted by millions around the globe, alongside cutting-edge digital asset tokenization services.Tether Power: We drive sustainable growth by optimizing excess energy for Bitcoin mining through eco-friendly practices in advanced, geographically diverse facilities.Tether Data: We are pioneering advancements in AI and peer-to-peer technology to lower infrastructure costs and improve global communication with innovative solutions like KEET, our flagship app designed for secure and private data sharing.Tether Education: We are committed to democratizing access to premium digital education, empowering individuals to excel in the digital and gig economies.Tether Evolution: At the crossroads of technology and human potential, we are redefining what’s achievable, crafting a future where innovation meets human capability in transformative ways.Why You Should Work with Us?Our diverse team spans the globe, allowing you to work remotely from anywhere. If you are eager to make a significant impact in the fintech industry, this is your chance to collaborate with some of the brightest minds, challenging norms and setting new benchmarks.

Location: Fully Remote (EMEA & LATAM)Employment Type: Full-timeAbout the Company:Join a pioneering AI-powered platform that is transforming matchmaking experiences. Supported by prominent venture capitalists, our client harnesses cutting-edge technologies to create meaningful connections between individuals.Role Overview:We are on the lookout for a Senior Full Stack Engineer to become an integral part of our dynamic team. In this role, you will design, develop, and maintain scalable web applications that provide outstanding user experiences. The right candidate will possess a robust background in both frontend and backend development and will be passionate about creating intuitive and efficient systems.Key Responsibilities:Develop and implement innovative full-stack features utilizing TypeScript, Vue.js, and PostgreSQL on the Supabase platform.Collaborate with cross-functional teams to design and enhance user interfaces with Tailwind CSS.Analyze and optimize existing image and text/LLM models to improve matchmaking precision.Assess compatibility between users based on profile images and textual data.Create and maintain comprehensive software design documentation, including flowcharts, state-machine diagrams, and data models.Evaluate and enhance system performance in relation to data storage, bandwidth, and computational expenses.Participate in code reviews to ensure quality and adherence to best practices.Mentor junior developers and support their career growth.

Alt is revolutionizing the world of alternative assets, beginning with the $5 billion trading card market. We empower collectors to buy, sell, vault, and finance their cards all in one platform, supported by top-tier investors from Stripe, Coinbase, Seven Seven Six, and renowned athletes like Tom Brady and Giannis Antetokounmpo. Our next major initiative involves implementing real-time pricing at scale—the Alt Value that drives every trade, loan, and product offered on our platform. We are in search of a Senior Fullstack Engineer who is eager to construct the financial engine of our platform. Your role will extend beyond developing a checkout flow; you will be empowering the liquidity that sustains our marketplace. You will collaborate with a high-impact team responsible for our custom double-entry ledger, payment provider integrations, and key lending products.If you possess a detail-oriented mindset for backend integrity while maintaining a proactive approach on the frontend, you'll excel in this role.Your Responsibilities:Engineer Financial Integrity: Develop and uphold our custom-built double-entry ledger system to guarantee every cent is accurately tracked across the platform.Own Lending Infrastructure: Design and scale our lending products—from defining credit disbursement logic to automating the lifecycle of loan management.Architect Integrations: Create and implement robust integrations with payment gateways and banking partners, ensuring 99.99% reliability and seamless reconciliation.Own the UX of Money: Develop high-trust user interfaces for payments and lending that simplify complex financial transactions, making them feel transparent and secure.Balance Rigor with Speed: Make informed decisions between rapid feature deployment and the uncompromising accuracy needed for financial systems.Be a Multiplier: Enhance the team through thorough code reviews, technical documentation, and mentorship.This Role is Ideal For You If You…Are Obsessed with Correctness: You recognize that in payments, “mostly working” equates to failure. You deeply contemplate idempotency, race conditions, and data consistency.Think Like a Product Owner: You don’t merely build a “pay button”; you comprehend the entire flow of financial transactions and their implications.

Join Newsela as a Senior Fullstack Quality Engineer and play a pivotal role in enhancing our platform's quality and performance. You'll be part of a dynamic team focused on creating a seamless experience for educators and students across various subjects. Your expertise will help us ensure that our products meet the highest standards of quality and reliability.In this role, you will collaborate closely with developers and product managers to develop comprehensive test strategies, automate testing processes, and identify areas for improvement. If you are passionate about quality assurance and eager to contribute to an innovative educational platform, we would love to hear from you!

Join Binance, the world's foremost blockchain ecosystem that powers the largest cryptocurrency exchange by trading volume and user base. Trusted by over 300 million individuals across more than 100 countries, we prioritize industry-leading security, transparency of user funds, rapid trading engine performance, deep liquidity, and an exceptional array of digital asset products. Our diverse offerings encompass trading, finance, education, research, payments, institutional services, Web3 functionalities, and much more. At Binance, we harness the potential of digital assets and blockchain technology to foster an inclusive financial ecosystem, enhancing monetary freedom and improving financial accessibility globally.About the TeamThe Binance Cloud team provides a comprehensive exchange infrastructure solution that allows qualified entities to seamlessly launch and operate a cryptocurrency exchange. By leveraging Binance's state-of-the-art technology, Binance Cloud ensures top-tier liquidity, robust regulatory compliance, and reliable system stability, with extensive customization options available.We are in search of a mid to senior-level Java Engineer who possesses a strong background in developing trading systems. The ideal candidate will have a proven track record in designing systems that prioritize high concurrency and high availability.

Join Binance, the world's leading blockchain ecosystem and largest cryptocurrency exchange by trading volume and registered users. We empower over 300 million users across more than 100 countries with our commitment to security, transparency in user funds, rapid trading engine performance, deep liquidity, and a comprehensive array of digital asset products. Our offerings span trading, finance, education, research, payments, institutional services, Web3 functionalities, and more, as we harness the potential of digital assets and blockchain technology to create an inclusive financial ecosystem that enhances the freedom of money and broadens financial access globally.We are seeking a Senior Software Engineer with 5-7 years of robust experience in Spring Boot development to architect, build, and sustain high-performance, resilient distributed systems. The ideal candidate will possess a strong foundation in Java programming, demonstrate familiarity with microservices architecture, and thrive in a dynamic and fast-paced work environment. If you are passionate about cutting-edge technology and eager to make an impact in the financial sector, we would love to hear from you!

Join Binance, the world's premier blockchain ecosystem and the largest cryptocurrency exchange by trading volume and registered users. Trusted by over 230 million individuals across 100+ countries, we pride ourselves on our industry-leading security measures, transparency in user funds, rapid trading engine capabilities, deep liquidity, and an unparalleled range of digital asset products. Our offerings encompass trading, finance, education, research, payments, institutional services, Web3 features, and much more. At Binance, we harness the transformative power of digital assets and blockchain technology to create an inclusive financial ecosystem that champions monetary freedom and enhances financial access for people globally.About the Binance Accelerator ProgramThe Binance Accelerator Program is a unique, fixed-term opportunity tailored for early career talent to immerse themselves in the fast-paced Web3 landscape. You'll gain firsthand insight into the operations of Binance and uncover the intricacies of the world’s foremost blockchain ecosystem. In addition to your core responsibilities, the program emphasizes networking and professional development, helping you expand your professional connections while acquiring transferable skills that will advance your career trajectory. For more details, click here: HERE Who Can Apply We welcome current university students and recent graduates to apply.

Join Binance, the world’s leading blockchain ecosystem powering the largest cryptocurrency exchange globally, renowned for its cutting-edge security measures, transparency in user funds, lightning-fast trading engines, robust liquidity, and an extensive portfolio of digital asset offerings. With a customer base exceeding 300 million across over 100 countries, we are committed to leveraging digital assets and blockchain technology to foster an inclusive financial ecosystem that champions the freedom of money and enhances global financial accessibility.As a pivotal member of our KYC Technology Team, you will contribute to the development of an advanced platform designed to streamline the onboarding experience for our customers. Your role will involve creating a scalable KYC platform, spearheading innovative product launches, and seamlessly integrating with regional and global compliance vendors. We emphasize the responsible application of AI/ML technologies while ensuring adherence to both international and local regulatory standards. Step into a role that places you at the forefront of innovation and regulatory compliance within the financial technology sector.

Join Binance, the forefront of the global blockchain revolution, and be part of the team driving innovation in the world’s largest cryptocurrency exchange, recognized for its unparalleled trading volume and user base. With over 300 million users across 100+ countries, we are committed to providing industry-leading security, transparency in user funds, rapid trading engine capabilities, and a vast array of digital asset products. Our offerings encompass trading, finance, education, research, payments, institutional services, Web3 functionalities, and more. Our mission is to harness the potential of digital assets and blockchain technology to create an inclusive financial ecosystem, advancing monetary freedom and enhancing financial access for individuals globally.We are actively seeking a Senior Java Backend Engineer (Web3 Data) to spearhead the design and development of cutting-edge on-chain data processing and computation pipelines. In this pivotal role, you will architect high-performance, scalable, and reliable backend systems that efficiently parse, transform, and analyze blockchain data in real-time across multiple chains.This position demands a robust background in Java microservices, distributed systems, and data-intensive computation, coupled with a deep understanding of Web3 ecosystems and on-chain data analytics. You will collaborate closely with blockchain researchers, data engineers, and backend teams to deliver low-latency APIs and generate large-scale data insights that power our DeFi and on-chain analytics products.

Join Binance, the forefront of the global blockchain ecosystem, powering the world’s largest cryptocurrency exchange by trading volume and user registrations. Trusted by over 300 million individuals across 100+ countries, we pride ourselves on our industry-leading security, transparency of user funds, rapid trading engine speed, deep liquidity, and an unparalleled array of digital asset offerings. Our diverse services span trading, finance, education, research, payments, institutional solutions, Web3 functionalities, and beyond. At Binance, we harness the potential of digital assets and blockchain technology to create an inclusive financial ecosystem that promotes financial freedom and enhances accessibility for individuals worldwide.

About the RoleWe are seeking an experienced and motivated Senior Backend Engineer (generalist) with a robust background in Java and preferably Kotlin to join our dynamic team. In this remote position, you will play a pivotal role in developing our product from the ground up. Your responsibilities will include integrating with enterprise systems, scraping and analyzing large datasets, and creating systems that empower users to utilize LLMs for generating scalable sales insights—extracting critical information from millions of public documents.You could be the ideal candidate if you: Are an accomplished developer with experience in Enterprise B2B SaaS or Big Data processing within the JVM ecosystem, with Kotlin as a plus.Have a history of impactful engineering experience in a startup or smaller organization.Are enthusiastic about engaging in all aspects of backend development and have experience collaborating within small teams in fast-paced startup environments.Possess familiarity with the following technologies: Kotlin (Backend)Google Cloud Platform (GCP)Google Cloud SQL for PostgreSQLFirebasePythonHave experience with any of the following (not mandatory):Natural Language GenerationEnterprise API integrationsPrompt EngineeringLarge Scale Web Scraping & ParsingAre proficient in both written and spoken English.Our Work CultureCustomer-Centric Approach - We pride ourselves on putting customers at the heart of everything we do.Rapid Execution - We operate with a sense of urgency and decisiveness, always striving to gain momentum.Joy in the Journey - We intentionally create an environment that is both energizing and enjoyable, fostering camaraderie and resilience within our teams.Hands-On Engagement - We believe that the best ideas emerge from close engagement with our work, embracing challenges and complexities.

Why Join Praxent? At Praxent, we understand that you have choices. Let us share what sets us apart. Our work is revolutionizing the financial services landscape. Day after day, we collaborate with clients who have transformative ideas for their industries. They are experts in their domains and possess the vision and resources to make significant changes. All that’s needed is the right team to turn that vision into reality. If you’re a quick learner who enjoys tackling a diverse array of projects, you’ll thrive here. We assist our clients in modernizing outdated customer-facing software applications rather than starting from scratch. Our clients experience a return on investment within weeks, not months, and that’s why they partner with us. At Praxent, we empower you to work in your own way. With over 130 team members spread across the United States and Central/South America, our mission is to support and encourage you while providing the freedom necessary for you to excel. Whether you're working from home, a coffee shop, or while traveling, we strive to create an environment that allows you to live your best life—on your terms. We trust our team to bring their best selves to work. This level of autonomy and respect has resulted in the growth of a diverse and exceptional team of experts, who are also some of the finest colleagues you’ll ever work with. This position is fully remote, allowing you to work from anywhere, as long as you inform the company of your location. Team members may reside in Mexico, El Salvador, or Colombia. This position is part of our 2026 project pipeline, which means we are actively reaching out to skilled professionals for future roles instead of immediate openings. Additionally, the first step in our hiring process will involve a preliminary technical assessment with an AI-powered recruiter. This ensures an efficient, fair, and consistent experience for all candidates prior to the human-led interviews. Your Mission: Enhance the team’s ability to deliver assigned stories by the end of each sprint.

Role overview pridelogic is seeking a Senior React Native Engineer located in LATAM to lead mobile development in a remote, AI-driven environment. This role involves more than routine ticket work. The team values engineers who think independently and can build scalable mobile systems from the ground up, transforming broad product concepts into production-ready applications. Working as part of a small group, this engineer will own projects end-to-end. AI agents support research, planning, and implementation, but responsibility for technical decisions and product quality remains with the engineer. Success in this position requires quick, thoughtful decision-making and a strong focus on performance, usability, and high standards. What you will do Design and lead mobile application architecture in React Native, from setup through deployment. Make independent architectural decisions that emphasize scalability, maintainability, and speed. Develop and maintain backend services using Node.js to support mobile features. Design and optimize SQL databases, particularly Postgres, with careful attention to data modeling and performance. Establish engineering patterns for mobile, backend, and API integrations that can scale. Set and uphold standards for architecture, code quality, testing, and developer experience. Define technical direction and broad strategies, not just day-to-day implementation. Maintain quality benchmarks for both AI-generated and manually written code. Translate ambiguous product requirements into clear, actionable technical solutions. Ensure applications deliver strong performance, quality, and responsiveness. Work directly with clients to clarify needs and keep communication open. Contribute to system design, performance planning, testing strategies, and engineering productivity. Operate effectively in an AI-first workflow while maintaining high engineering standards. What sets this role apart This position is ideal for engineers who want to take full ownership of mobile architecture, work closely with backend systems, and drive technical standards in a setting that values accountability and autonomy. The work moves quickly and calls for systemic thinking and decisive action, often with minimal supervision.

About Us:Alpaca is a pioneering self-clearing broker-dealer and brokerage infrastructure provider based in the United States, offering an extensive range of financial products including stocks, ETFs, options, cryptocurrencies, and fixed income with 24/5 trading capabilities. Our recent Series D funding round has raised over $320 million, propelling our ambitious mission forward.As a licensed financial services company, Alpaca serves hundreds of financial institutions across 40 countries, providing institutional-grade APIs to broker-dealers, investment advisors, wealth managers, hedge funds, and crypto exchanges, managing over 9 million brokerage accounts.Our diverse global team consists of seasoned engineers, traders, and brokerage specialists dedicated to our goal of making financial services accessible to everyone worldwide. We are committed to open-source contributions and nurturing a vibrant community while continuously improving our award-winning, developer-friendly API.Alpaca is proudly financed by esteemed global investors including Portage Ventures, Spark Capital, Tribe Capital, Social Leverage, Horizons Ventures, Unbound, SBI Group, Derayah Financial, Elefund, and Y Combinator. Join Our Team:We are a vibrant team of over 230 globally distributed professionals who enjoy working from various locations around the world, including the USA, Canada, Japan, Hungary, Nigeria, Brazil, the UK, and beyond! We are looking for passionate individuals eager to contribute to Alpaca's rapid growth. If you share our core values—Stay Curious, Have Empathy, and Be Accountable—and are ready to make a significant impact, we encourage you to apply.Your Role:As a Sales Engineer at Alpaca, you will be a vital resource for all products and services offered to our partners. Your role will involve utilizing your technical expertise, exceptional communication skills, and innovative problem-solving abilities to enhance the sales process for Alpaca's expanding array of products and services. You will primarily focus on broadening our enterprise partnerships within your designated territory.Your Responsibilities:Act as the product and technical subject matter expert, proficiently understanding and articulating all facets of the Alpaca platform to diverse audiences and stakeholders.

About the RoleAs the Team Lead for our software development team, you will be instrumental in shaping the architecture, development, and delivery of top-tier software solutions. You will guide a talented group of developers, fostering collaboration, driving technical innovation, and ensuring robust delivery outcomes. Your role will blend hands-on coding with team leadership, empowering the team to excel in a dynamic environment.Our Tech StackLanguage: Java 17Frameworks: Spring Boot (Tomcat, Netty), Spring Data, Spring CloudArchitecture: Microservices, REST API, Message QueuesDatabase: MySQL, MyBatis, MongoDBCaching: Redis (AWS ElastiCache), ElasticSearchMessage Queue: RocketMQCloud: Kubernetes, AWSMonitoring: Grafana, Prometheus, Loki, Tempo, AWS CloudWatch, OpenTracingCI/CD: Jenkins, ArgoCDKey ResponsibilitiesLead and mentor a skilled development team across Europe, cultivating a culture of high-performance collaboration.Provide technical guidance and uphold best practices in software development, code quality, and system architecture.Engage in high-level architectural and design discussions for complex software systems.Oversee the entire development lifecycle from requirements gathering to deployment, guaranteeing timely delivery of high-quality solutions.Conduct regular code reviews, offering constructive feedback to enhance team skills and productivity.Manage team performance and support career development initiatives.Promote continuous improvement within development processes, tools, and techniques.Qualifications8+ years of software development experience, particularly in backend technologies (e.g., Java, Node.js, Python, Go, etc.).2+ years in a leadership capacity, with experience in mentoring, performance evaluations, and task allocation.Strong background in software architecture and designing scalable, reliable systems.Proven hands-on experience in backend development, with an emphasis on APIs and microservices.Exceptional communication skills in English, with the ability to manage and collaborate effectively within a diverse remote team.A passion for technology and innovation, coupled with a desire to tackle complex technical challenges.