Senior QA Engineer
Status
London, United Kingdom
Full time
Hybrid
Compensation is not specified
Role
QA Engineer
Description
We are dedicated to making the digital asset world inclusive and secure for all individuals. If you are passionate about contributing to this mission, we invite you to join us.
Established in 2014, Ledger serves as a global digital asset and Web3 platform. Currently, more than 15% of the world's crypto assets are safeguarded through our Ledger Nanos. Located in Paris, Vierzon, the UK, US, Switzerland, and Singapore, Ledger boasts a team exceeding 600 professionals work on diverse products and services. Our primary focus is to enable individuals and businesses to securely purchase, store, exchange, grow, and manage crypto assets, including the famed Ledger hardware wallets — with over 5 million units sold in 180 countries.
We at Ledger embody distinctive values: Pragmatism, Audacity, Commitment, Trust, and Transparency. Our overarching goal is to deliver high-quality products that ensure customer satisfaction.
The Quality Assurance (QA) Engineering team at Ledger plays a pivotal role in safeguarding customer experience, protecting against potential pitfalls such as poor user experience, financial loss, wasted time, and damage to business reputation. The team accomplishes this through active monitoring of quality indicators, holding engineering and product teams accountable, and testing the final product to gauge user experience quality.
As a QA engineer collaborating with one or more product teams, your responsibilities will encompass formulating test strategies for upcoming features, aiding in test execution, and contributing to the development of automated tests. The key activities include estimating, prioritizing, planning, and coordinating testing activities, designing, writing, maintaining, and running functional and regression tests, managing task details and testing scope for multiple projects, performing continuous regression testing, participating in bug management, actively involving in agile meetings with product and development teams, reviewing requirement specifications and technical design documents, and staying abreast of testing tools and methodologies.
Requirements:
- Minimum 5 years of QA experience
- Practical experience with test management tools
- Familiarity with the terminal, shell script, git, and CI/CD environments
- Proficiency in writing automated tests using Playwright or Detox in Javascript
- Flexibility to learn and adapt to new technical skills
- Strong organizational and documentation skills
- Ability to handle multiple complex projects simultaneously
- Proficiency in testing on Windows, macOS, iOS, and Android platforms
- Tech-savvy, curious, and resourceful with strong communication skills
Bonus Skills:
- Background in native applications
- Interest in test automation
- Curiosity in blockchain technology and web3
Benefits:
- Equity opportunities
- Flexible hybrid work policy
- Social events and outings
- Comprehensive health insurance
- Personal development and fitness facilities
- Generous vacation days
- Access to high-performance office equipment
- Transportation reimbursement
- Employee discount on products
We are an equal opportunity employer and welcome applicants regardless of gender, ethnicity, religion, sexual orientation, social status, disability, or age.
Skills Required
Ledger
Website
www.ledger.comCompany size
Not specified
Location
United States
Description
Ledger is a leader in security and infrastructure solutions for cryptocurrencies and blockchain applications. We are constantly looking for innovative, talented people to join our team.
Status
Utopos
Job Opportunity: AI Engineer for UFO Image/video Authentication System 👽
Full time
Remote
🚀 Job Opportunity: AI Engineer for UFO Image Authentication System 👽
About Us:
We are building a cutting-edge AI-powered system to analyze and authenticate UFO images using machine learning, computer vision, and blockchain verification. Our goal is to separate fact from fiction and create a decentralized, transparent UFO sighting database. We are looking for a talented AI Engineer to help develop this groundbreaking system.
Role: AI Engineer (Computer Vision & Machine Learning)
Location: Remote
Contract Type: Freelance / Full-time
Responsibilities:
🔹 Develop and train deep learning models (CNNs, GANs) to detect manipulated, AI-generated, or authentic UFO images.
🔹 Build a real-time image analysis system capable of categorizing UFO sightings.
🔹 Implement object recognition & anomaly detection to classify spacecraft, weather phenomena, and aircraft.
🔹 Integrate blockchain & decentralized storage (IPFS) for verified image records.
🔹 Develop a user submission & verification portal that allows experts to weigh in on authenticity.
Requirements:
✅ Strong experience in TensorFlow, PyTorch, or OpenCV for image recognition.
✅ Experience with YOLO or other object detection models.
✅ Knowledge of deepfake detection and GAN analysis.
✅ Experience with blockchain for data integrity (Polygon, Ethereum, or Hyperledger).
✅ Ability to process large-scale datasets from online sources & government archives.
Bonus Skills:
⭐ Background in astronomy, aerospace, or remote sensing.
⭐ Experience working with NASA, FAA, MUFON, or other UFO databases.
⭐ Previous work in forensic image analysis & metadata authentication.
Why Join Us?
🚀 Be part of a pioneering AI research project to uncover real UFO sightings.
🔍 Work with leading experts in AI, aerospace, and blockchain.
💰 Competitive pay in crypto, UTOP.
📩 Apply Now! Send your portfolio, GitHub, and resume. Let’s reveal the truth together! 👽📡
About Us:
We are building a cutting-edge AI-powered system to analyze and authenticate UFO images using machine learning, computer vision, and blockchain verification. Our goal is to separate fact from fiction and create a decentralized, transparent UFO sighting database. We are looking for a talented AI Engineer to help develop this groundbreaking system.
Role: AI Engineer (Computer Vision & Machine Learning)
Location: Remote
Contract Type: Freelance / Full-time
Responsibilities:
🔹 Develop and train deep learning models (CNNs, GANs) to detect manipulated, AI-generated, or authentic UFO images.
🔹 Build a real-time image analysis system capable of categorizing UFO sightings.
🔹 Implement object recognition & anomaly detection to classify spacecraft, weather phenomena, and aircraft.
🔹 Integrate blockchain & decentralized storage (IPFS) for verified image records.
🔹 Develop a user submission & verification portal that allows experts to weigh in on authenticity.
Requirements:
✅ Strong experience in TensorFlow, PyTorch, or OpenCV for image recognition.
✅ Experience with YOLO or other object detection models.
✅ Knowledge of deepfake detection and GAN analysis.
✅ Experience with blockchain for data integrity (Polygon, Ethereum, or Hyperledger).
✅ Ability to process large-scale datasets from online sources & government archives.
Bonus Skills:
⭐ Background in astronomy, aerospace, or remote sensing.
⭐ Experience working with NASA, FAA, MUFON, or other UFO databases.
⭐ Previous work in forensic image analysis & metadata authentication.
Why Join Us?
🚀 Be part of a pioneering AI research project to uncover real UFO sightings.
🔍 Work with leading experts in AI, aerospace, and blockchain.
💰 Competitive pay in crypto, UTOP.
📩 Apply Now! Send your portfolio, GitHub, and resume. Let’s reveal the truth together! 👽📡
Payment in Crypto
Rivalz Network
AI Researcher (mid-level)
Full time
Remote
Rivalz Network
Rivalz Network’s infrastructure abstracts the complexities of connecting AI services and agents to various real-world resources. By orchestrating resource-backed agents, providing a decentralized data layer for secure processing and retrieval, enabling verifiable requests through an AI oracle, mapping both identity and resources seamlessly, and offering an AI x Web3 platform for fast application publishing and monetization, Rivalz empowers teams to bridge digital and physical ecosystems. Our ultimate goal is to unlock the full potential of an agent-centric future, enabling developers and no-code builders alike to harness AI-driven solutions with ease.
Working at Rivalz
We embrace a flexible, globally distributed environment that allows our team members to work from where they’re most comfortable—whether that’s at home or on the move. We leverage virtual collaboration and remote-friendly policies, enabling you to balance your personal life, family commitments, and professional goals. Wherever you are, you’ll be an integral part of our team which is shaping the future of AI, blockchain, and decentralized infrastructures. Join Rivalz’s forward-thinking AI Research team to push machine learning and agent-centric design, delivering impactful AI-Web3 solutions that empower innovators worldwide.
About the Role: AI Researcher (Mid-Level)
As a Mid-Level AI Researcher at Rivalz, you will play a key role in advancing our AI capabilities for seamless integration with real-world resources. You’ll spearhead novel research initiatives, publish findings, and architect solutions that drive our decentralized, agent-centric vision. If you’re eager to explore cutting-edge machine learning, deep learning, and blockchain, while seeing your work rapidly deployed in production, this is the perfect opportunity for you.
Key Responsibilities
Innovate & Research: Conduct advanced AI research in ML and DL to address complex challenges.
Design & Prototype: Architect and evaluate novel AI models for decentralized infrastructures.
Collaboration & Deployment: Work with cross-functional teams to develop production-ready AI solutions.
Open-Source & Community: Maintain a strong GitHub presence and engage with the broader AI/Web3 community.
Thought Leadership: Stay current with emerging AI trends to continually refine Rivalz’s infrastructure.
Real-World Integration: Expand AI’s reach into both digital and physical ecosystems for seamless interoperability.
Qualifications
Educational Background: Bachelor’s in Computer Science or related field (Master’s/PhD preferred).
Technical Expertise: Proficiency in Python, ML frameworks, and experience with LLMs/generative AI.
Blockchain Familiarity: Exposure to decentralized systems and their intersection with AI is a bonus.
Research & Publication: Track record in AI research, open-source contributions, or academic publications.
Collaboration & Communication: Strong interpersonal skills for distributed team coordination.
Adaptability & Problem-Solving: Ability to navigate evolving technologies with iterative, data-driven approaches.
Join us at Rivalz and be part of a pioneering team that’s redefining how AI agents interact with the world. Contribute your expertise, collaborate across disciplines, and help shape the agent-centric future.
How to Apply:
Submit your cover letter and resume at humaira@rivalz.ai
Rivalz Network’s infrastructure abstracts the complexities of connecting AI services and agents to various real-world resources. By orchestrating resource-backed agents, providing a decentralized data layer for secure processing and retrieval, enabling verifiable requests through an AI oracle, mapping both identity and resources seamlessly, and offering an AI x Web3 platform for fast application publishing and monetization, Rivalz empowers teams to bridge digital and physical ecosystems. Our ultimate goal is to unlock the full potential of an agent-centric future, enabling developers and no-code builders alike to harness AI-driven solutions with ease.
Working at Rivalz
We embrace a flexible, globally distributed environment that allows our team members to work from where they’re most comfortable—whether that’s at home or on the move. We leverage virtual collaboration and remote-friendly policies, enabling you to balance your personal life, family commitments, and professional goals. Wherever you are, you’ll be an integral part of our team which is shaping the future of AI, blockchain, and decentralized infrastructures. Join Rivalz’s forward-thinking AI Research team to push machine learning and agent-centric design, delivering impactful AI-Web3 solutions that empower innovators worldwide.
About the Role: AI Researcher (Mid-Level)
As a Mid-Level AI Researcher at Rivalz, you will play a key role in advancing our AI capabilities for seamless integration with real-world resources. You’ll spearhead novel research initiatives, publish findings, and architect solutions that drive our decentralized, agent-centric vision. If you’re eager to explore cutting-edge machine learning, deep learning, and blockchain, while seeing your work rapidly deployed in production, this is the perfect opportunity for you.
Key Responsibilities
Innovate & Research: Conduct advanced AI research in ML and DL to address complex challenges.
Design & Prototype: Architect and evaluate novel AI models for decentralized infrastructures.
Collaboration & Deployment: Work with cross-functional teams to develop production-ready AI solutions.
Open-Source & Community: Maintain a strong GitHub presence and engage with the broader AI/Web3 community.
Thought Leadership: Stay current with emerging AI trends to continually refine Rivalz’s infrastructure.
Real-World Integration: Expand AI’s reach into both digital and physical ecosystems for seamless interoperability.
Qualifications
Educational Background: Bachelor’s in Computer Science or related field (Master’s/PhD preferred).
Technical Expertise: Proficiency in Python, ML frameworks, and experience with LLMs/generative AI.
Blockchain Familiarity: Exposure to decentralized systems and their intersection with AI is a bonus.
Research & Publication: Track record in AI research, open-source contributions, or academic publications.
Collaboration & Communication: Strong interpersonal skills for distributed team coordination.
Adaptability & Problem-Solving: Ability to navigate evolving technologies with iterative, data-driven approaches.
Join us at Rivalz and be part of a pioneering team that’s redefining how AI agents interact with the world. Contribute your expertise, collaborate across disciplines, and help shape the agent-centric future.
How to Apply:
Submit your cover letter and resume at humaira@rivalz.ai
Jack Morty
Junior Recruiter (Startup)
Part time
Remote
Job Title: Junior Recruiter (Startup)
📌 Responsibilities:
Sourcing candidates for various roles (IT, marketing, sales, etc.).
Conducting initial screenings and interviews.
Managing candidate databases and maintaining communication throughout the hiring process.
Posting job openings on different platforms and social media.
Collaborating with department heads to identify hiring needs.
📌 Requirements:
6+ months of experience in recruitment or a strong desire to learn.
Understanding of sourcing techniques and candidate search methods.
Proficiency in job boards, and social media recruitment.
Ability to conduct interviews and assess candidates effectively.
Strong communication and organizational skills.
English at an Intermediate+ level (preferred).
📌 What We Offer:
Flexible schedule (remote).
Opportunity to grow in a dynamic startup environment.
Training and mentorship from the team.
Competitive salary.
📩 Interested? Send us your resume! 🚀
📌 Responsibilities:
Sourcing candidates for various roles (IT, marketing, sales, etc.).
Conducting initial screenings and interviews.
Managing candidate databases and maintaining communication throughout the hiring process.
Posting job openings on different platforms and social media.
Collaborating with department heads to identify hiring needs.
📌 Requirements:
6+ months of experience in recruitment or a strong desire to learn.
Understanding of sourcing techniques and candidate search methods.
Proficiency in job boards, and social media recruitment.
Ability to conduct interviews and assess candidates effectively.
Strong communication and organizational skills.
English at an Intermediate+ level (preferred).
📌 What We Offer:
Flexible schedule (remote).
Opportunity to grow in a dynamic startup environment.
Training and mentorship from the team.
Competitive salary.
📩 Interested? Send us your resume! 🚀
Payment in Crypto
Everyvote
Backend Developer
New York, USA
New York, USA
Full time
Remote
About Us:
GP Vote is an innovative startup dedicated to transforming the democratic process through a cutting-edge voting platform integrated with blockchain technology. Our mission is to empower individuals to voice their opinions and shape collective decisions in a secure and transparent environment. We believe that every voice matters, and our platform fosters inclusivity by allowing users to propose titles and suggestions.
We are seeking a talented Frontend Developer with a strong background in React and TypeScript. The ideal candidate will have experience in Web3 and blockchain technologies, enabling them to contribute to our mission of delivering high-quality digital products.
Key Responsibilities:
Lead the migration of our backend systems from Express.js to ASP.NET.
Design, develop, and maintain scalable and secure backend services.
Collaborate with front-end developers to integrate user-facing elements using server-side logic.
Implement data storage solutions and ensure data integrity.
Develop and maintain APIs for mobile and web applications.
Optimize applications for maximum speed and scalability.
Monitor and troubleshoot issues in the production environment.
Stay updated with emerging technologies and trends in backend development, Web3, and Blockchain.
Required Qualifications:
Proven experience as a Backend Developer or similar role.
Strong proficiency in ASP.NET and C#.
Deep knowledge of backend development principles and best practices.
Proficient in database management (SQL, NoSQL).
Understanding of RESTful APIs and microservices architecture.
Experience with version control systems (e.g., Git).
Preferred Qualifications:
Experience with Web3 technologies (e.g., Ethereum, smart contracts).
Familiarity with Blockchain concepts and decentralized applications (dApps).
Knowledge of containerization technologies (Docker, Kubernetes).
Familiarity with CI/CD pipelines and DevOps practices.
Understanding of security best practices in backend development.
Benefits:
Competitive salary and performance-based bonuses.
Flexible working hours and remote work options.
Generous vacation policy and paid time off.
Health, dental, and vision insurance.
Professional development opportunities and access to online courses.
Collaborative and inclusive company culture.
Opportunities to work on cutting-edge technology in the Web3 and Blockchain space.
Team-building activities and company retreats.
How to Apply:
If you are excited about the opportunity to work with a forward-thinking company and have the skills we’re looking for, please send your resume and a cover letter to larry@everyvote.xyz.
Join us in shaping the future of voting technology!
GP Vote is an innovative startup dedicated to transforming the democratic process through a cutting-edge voting platform integrated with blockchain technology. Our mission is to empower individuals to voice their opinions and shape collective decisions in a secure and transparent environment. We believe that every voice matters, and our platform fosters inclusivity by allowing users to propose titles and suggestions.
We are seeking a talented Frontend Developer with a strong background in React and TypeScript. The ideal candidate will have experience in Web3 and blockchain technologies, enabling them to contribute to our mission of delivering high-quality digital products.
Key Responsibilities:
Lead the migration of our backend systems from Express.js to ASP.NET.
Design, develop, and maintain scalable and secure backend services.
Collaborate with front-end developers to integrate user-facing elements using server-side logic.
Implement data storage solutions and ensure data integrity.
Develop and maintain APIs for mobile and web applications.
Optimize applications for maximum speed and scalability.
Monitor and troubleshoot issues in the production environment.
Stay updated with emerging technologies and trends in backend development, Web3, and Blockchain.
Required Qualifications:
Proven experience as a Backend Developer or similar role.
Strong proficiency in ASP.NET and C#.
Deep knowledge of backend development principles and best practices.
Proficient in database management (SQL, NoSQL).
Understanding of RESTful APIs and microservices architecture.
Experience with version control systems (e.g., Git).
Preferred Qualifications:
Experience with Web3 technologies (e.g., Ethereum, smart contracts).
Familiarity with Blockchain concepts and decentralized applications (dApps).
Knowledge of containerization technologies (Docker, Kubernetes).
Familiarity with CI/CD pipelines and DevOps practices.
Understanding of security best practices in backend development.
Benefits:
Competitive salary and performance-based bonuses.
Flexible working hours and remote work options.
Generous vacation policy and paid time off.
Health, dental, and vision insurance.
Professional development opportunities and access to online courses.
Collaborative and inclusive company culture.
Opportunities to work on cutting-edge technology in the Web3 and Blockchain space.
Team-building activities and company retreats.
How to Apply:
If you are excited about the opportunity to work with a forward-thinking company and have the skills we’re looking for, please send your resume and a cover letter to larry@everyvote.xyz.
Join us in shaping the future of voting technology!
Payment in Crypto
DynamicX
Full Stack Engineer
Baiern, Germany
Baiern, Germany
Full time
Remote
About Us
At DynamicX, we're revolutionizing the way sports enthusiasts invest in their passions. Founded by Nicolas Weiner, Tristan Reinthaler, and Gerd Weiner, our innovative platform merges the excitement of sports with cutting-edge financial technology.
Our mission is to empower sports fans to turn their enthusiasm into smart investments, transforming the traditional sports industry landscape. We believe that by combining sports enthusiasm with strategic financial markets, we can create new opportunities for both fans and athletes alike.
Our journey began with a simple idea: what if sports fans could invest in the very athletes and teams they cheer for? This sparked a movement to democratize access to sports investment and create a more engaging, interactive experience for sports enthusiasts worldwide.
At DynamicX, we're committed to innovation, transparency, and community engagement. Our team of passionate technologists, financial experts, and sports enthusiasts works tirelessly to develop cutting-edge solutions that bridge the gap between sports enthusiasm and smart investing.
Join us in shaping the future of sports investment and turning your passion into a career-defining opportunity.
Job Summary
We're looking for a talented Full Stack Engineer who excels in creating robust, scalable, and efficient web applications. You will play a crucial role in developing and maintaining our core platform, working closely with our cross-functional team to deliver high-quality features and improvements. Your expertise in both front-end and back-end technologies will be invaluable in shaping the future of sports investment.
Responsibilities
Design, develop, test, and deploy full-stack web applications using modern technologies
Collaborate with product managers, designers, and other engineers to understand requirements and create solutions
Implement scalable backend services using Node.js, Express, or similar frameworks
Develop responsive and performant front-end interfaces using React, Vue.js, or similar libraries
Integrate third-party APIs and services effectively
Optimize application performance and maintain high code quality standards
Participate in code reviews and contribute to improving team processes
Troubleshoot production issues and implement bug fixes promptly
Stay up-to-date with industry trends and emerging technologies
Requirements
Bachelor's degree in Computer Science or related field (or equivalent experience)
Minimum 3 years of experience in full-stack development
Proficiency in JavaScript (ES6+) and TypeScript
Experience with modern front-end frameworks (React, Vue.js, or similar)
Strong understanding of backend technologies (Node.js, Express, etc.)
Familiarity with databases (MongoDB, MySQL, etc.) and ORM tools
Knowledge of RESTful APIs and GraphQL
Experience with cloud platforms (AWS, Azure, or Google Cloud)
Version control experience with Git
Strong problem-solving skills and attention to detail
Excellent communication and teamwork abilities
Preferred Qualifications
Experience with blockchain technologies
Knowledge of sports-related APIs or platforms
Familiarity with cryptocurrency trading systems
Experience with automated trading systems
Understanding of tokenization concepts
Certification in cloud computing or DevOps
What We Offer
Competitive salary
Comprehensive health insurance package
Flexible hybrid remote work arrangement
Generous PTO policy (20 days annual leave + 10 paid holidays)
Professional development opportunities
Stock options in a growing startup
Access to cutting-edge technologies and tools
Collaborative and dynamic work environment
Opportunities for career growth and advancement
At DynamicX, we're revolutionizing the way sports enthusiasts invest in their passions. Founded by Nicolas Weiner, Tristan Reinthaler, and Gerd Weiner, our innovative platform merges the excitement of sports with cutting-edge financial technology.
Our mission is to empower sports fans to turn their enthusiasm into smart investments, transforming the traditional sports industry landscape. We believe that by combining sports enthusiasm with strategic financial markets, we can create new opportunities for both fans and athletes alike.
Our journey began with a simple idea: what if sports fans could invest in the very athletes and teams they cheer for? This sparked a movement to democratize access to sports investment and create a more engaging, interactive experience for sports enthusiasts worldwide.
At DynamicX, we're committed to innovation, transparency, and community engagement. Our team of passionate technologists, financial experts, and sports enthusiasts works tirelessly to develop cutting-edge solutions that bridge the gap between sports enthusiasm and smart investing.
Join us in shaping the future of sports investment and turning your passion into a career-defining opportunity.
Job Summary
We're looking for a talented Full Stack Engineer who excels in creating robust, scalable, and efficient web applications. You will play a crucial role in developing and maintaining our core platform, working closely with our cross-functional team to deliver high-quality features and improvements. Your expertise in both front-end and back-end technologies will be invaluable in shaping the future of sports investment.
Responsibilities
Design, develop, test, and deploy full-stack web applications using modern technologies
Collaborate with product managers, designers, and other engineers to understand requirements and create solutions
Implement scalable backend services using Node.js, Express, or similar frameworks
Develop responsive and performant front-end interfaces using React, Vue.js, or similar libraries
Integrate third-party APIs and services effectively
Optimize application performance and maintain high code quality standards
Participate in code reviews and contribute to improving team processes
Troubleshoot production issues and implement bug fixes promptly
Stay up-to-date with industry trends and emerging technologies
Requirements
Bachelor's degree in Computer Science or related field (or equivalent experience)
Minimum 3 years of experience in full-stack development
Proficiency in JavaScript (ES6+) and TypeScript
Experience with modern front-end frameworks (React, Vue.js, or similar)
Strong understanding of backend technologies (Node.js, Express, etc.)
Familiarity with databases (MongoDB, MySQL, etc.) and ORM tools
Knowledge of RESTful APIs and GraphQL
Experience with cloud platforms (AWS, Azure, or Google Cloud)
Version control experience with Git
Strong problem-solving skills and attention to detail
Excellent communication and teamwork abilities
Preferred Qualifications
Experience with blockchain technologies
Knowledge of sports-related APIs or platforms
Familiarity with cryptocurrency trading systems
Experience with automated trading systems
Understanding of tokenization concepts
Certification in cloud computing or DevOps
What We Offer
Competitive salary
Comprehensive health insurance package
Flexible hybrid remote work arrangement
Generous PTO policy (20 days annual leave + 10 paid holidays)
Professional development opportunities
Stock options in a growing startup
Access to cutting-edge technologies and tools
Collaborative and dynamic work environment
Opportunities for career growth and advancement
Payment in Crypto