Senior SDET (f/m)
Status
London, United Kingdom
Full time
Hybrid
Compensation is not specified
Role
QA Engineer
Description
Company Overview:
Ledger, founded in 2014, is a global platform for digital assets and Web3. The company is headquartered in Paris and Vierzon, with offices in the UK, US, Switzerland, and Singapore. Ledger's team of over 600 professionals is dedicated to developing products and services that enable individuals and businesses to securely buy, store, swap, grow, and manage crypto assets, including the Ledger hardware wallets line.
The company values pragmatism, audacity, commitment, trust, and transparency, as showcased in its Origins video.
Role Overview:
As an SDET at Ledger, you will work with a team of QA Automation Engineers to create tools and processes that empower product squads to autonomously manage test automation and uphold the quality of their outputs.
Responsibilities include:
- Designing and developing tools to enhance the quality assurance process across all stakeholders of the software development life cycle (SDLC).
- Establishing new and maintaining existing workflows for continuous integration and continuous deployment (CI/CD) pipelines.
- Crafting and evolving test automation frameworks.
- Developing and implementing effective automation testing processes and methodologies.
- Integrating automated testing into Quality Assurance practices.
- Collaborating with various teams through workshops and pair-programming sessions.
- Engaging with product squads to communicate enhancements, share strategies, best practices, and lessons learned.
Requirements:
- Demonstrated experience in developing test automation solutions using TypeScript.
- Proficiency in a web automation testing framework like Playwright, Detox, or Selenium.
- Strong knowledge of front-end and back-end testing tools and methodologies.
- Understanding of development processes, design patterns, and programming principles.
- Previous experience in designing workflows and constructing CI/CD pipelines.
- Excellent analytical and problem-solving capabilities.
- Collaborative team player with strong communication skills in English.
- Innovative mindset with the ability to embrace new trends and drive beneficial changes.
Bonus Skills:
- Experience in testing and automating blockchain products.
- Familiarity with Java or other programming languages.
- Proficiency with AWS, Docker containers, Kubernetes.
- Fluency in French.
Benefits:
- Equity opportunities to share in the company's success.
- Hybrid work policy for flexibility.
- Social events and outings for team building.
- Comprehensive health insurance coverage.
- Personal development and fitness partnerships.
- Five weeks of paid leave annually.
- Access to high-quality office equipment and gadgets.
- Transportation reimbursement.
- Employee discounts on company products.
Ledger is dedicated to fostering a diverse and inclusive work environment, welcoming individuals of all backgrounds without any form of discrimination.
Skills Required
Ledger
Website
www.ledger.comCompany size
Not specified
Location
United States
Description
Not specified
Status
Astra Byte Sync
Web3 Gaming Platform Development Team
Full time
Remote
Company Overview
A fastest growing Blockchain company is looking to create a decentralized gaming platform that empowers players and developers alike. We are currently seeking to build a talented team to bring their vision to life.
Position Overview
We are looking for skilled professionals to join our development team for a Web3 gaming platform. The ideal candidates will be passionate about blockchain technology and gaming, and possess the expertise to contribute to various aspects of our project. We are hiring for the following roles:
1. Frontend Developers
Responsibilities: Design and implement user interfaces for the gaming platform using modern frameworks (e.g., React, Vue.js). Collaborate with UX/UI designers to create engaging and intuitive user experiences.
Qualifications: Proficiency in HTML, CSS, JavaScript, and relevant frameworks. Experience with Web3 technologies is a plus.
2. Backend Developers
Responsibilities: Develop and maintain server-side logic, database management, and API integration. Ensure the platform's performance, security, and scalability.
Qualifications: Strong knowledge of Node.js, databases (e.g., MongoDB, PostgreSQL), and experience with cloud services. Familiarity with blockchain technology is advantageous.
3. Blockchain Developers
Responsibilities: Design and implement smart contracts, manage blockchain integrations, and ensure the security of decentralized applications. Collaborate with the team to optimize blockchain performance.
Qualifications: Expertise in Solidity, JavaScript, Rust, or Python. Experience with Ethereum and other blockchain platforms is essential.
4. Technical Leader
Responsibilities: Oversee the technical direction of the project, mentor team members, and ensure best practices in development. Collaborate with stakeholders to align technical goals with business objectives.
Qualifications: Proven experience in leading development teams, strong problem-solving skills, and a deep understanding of blockchain technologies.
5. Project Manager
Responsibilities: Manage project timelines, resources, and deliverables. Facilitate communication between team members and stakeholders, ensuring that the project stays on track and within budget.
Qualifications: Strong organizational and leadership skills, experience in project management methodologies (Agile, Scrum), and familiarity with the gaming and blockchain industries.
What We Offer
Competitive salaries and benefits
A dynamic and collaborative work environment
Opportunities for professional growth and development
The chance to be part of an innovative project that shapes the future of gaming
How to Apply
If you are passionate about gaming and blockchain technology and are excited to contribute to a groundbreaking project, we would love to hear from you! Please submit your resume and a cover letter detailing your relevant experience and why you would be a great fit for our team.
Join us in creating the next generation of gaming experiences!
A fastest growing Blockchain company is looking to create a decentralized gaming platform that empowers players and developers alike. We are currently seeking to build a talented team to bring their vision to life.
Position Overview
We are looking for skilled professionals to join our development team for a Web3 gaming platform. The ideal candidates will be passionate about blockchain technology and gaming, and possess the expertise to contribute to various aspects of our project. We are hiring for the following roles:
1. Frontend Developers
Responsibilities: Design and implement user interfaces for the gaming platform using modern frameworks (e.g., React, Vue.js). Collaborate with UX/UI designers to create engaging and intuitive user experiences.
Qualifications: Proficiency in HTML, CSS, JavaScript, and relevant frameworks. Experience with Web3 technologies is a plus.
2. Backend Developers
Responsibilities: Develop and maintain server-side logic, database management, and API integration. Ensure the platform's performance, security, and scalability.
Qualifications: Strong knowledge of Node.js, databases (e.g., MongoDB, PostgreSQL), and experience with cloud services. Familiarity with blockchain technology is advantageous.
3. Blockchain Developers
Responsibilities: Design and implement smart contracts, manage blockchain integrations, and ensure the security of decentralized applications. Collaborate with the team to optimize blockchain performance.
Qualifications: Expertise in Solidity, JavaScript, Rust, or Python. Experience with Ethereum and other blockchain platforms is essential.
4. Technical Leader
Responsibilities: Oversee the technical direction of the project, mentor team members, and ensure best practices in development. Collaborate with stakeholders to align technical goals with business objectives.
Qualifications: Proven experience in leading development teams, strong problem-solving skills, and a deep understanding of blockchain technologies.
5. Project Manager
Responsibilities: Manage project timelines, resources, and deliverables. Facilitate communication between team members and stakeholders, ensuring that the project stays on track and within budget.
Qualifications: Strong organizational and leadership skills, experience in project management methodologies (Agile, Scrum), and familiarity with the gaming and blockchain industries.
What We Offer
Competitive salaries and benefits
A dynamic and collaborative work environment
Opportunities for professional growth and development
The chance to be part of an innovative project that shapes the future of gaming
How to Apply
If you are passionate about gaming and blockchain technology and are excited to contribute to a groundbreaking project, we would love to hear from you! Please submit your resume and a cover letter detailing your relevant experience and why you would be a great fit for our team.
Join us in creating the next generation of gaming experiences!
Liza BlockDAG
Blockchain Go Developer
Cape Town, South Africa
Cape Town, South Africa
Full time
Remote
BlockDAG Network is revolutionizing the world of distributed ledger technology through Directed Acyclic Graph (DAG)-based infrastructures. Our goal is to create secure, scalable, and high-throughput decentralized networks. We uphold a culture of innovation, excellence, and continuous collaboration, providing an environment where forward-thinking professionals can thrive.
About the Role:
We are seeking an accomplished Lead Go Developer & DevOps Engineer to take on a strategic, cross-functional leadership position. This unique role sits at the intersection of software development and infrastructure operations. You will not only design and implement cutting-edge, Go-based components for our DAG-powered blockchain but also oversee the cloud infrastructure and automation frameworks that keep our platform resilient, secure, and scalable. As a team leader, you will collaborate closely with product, security, and data teams, championing best practices and ensuring cohesive execution across the engineering organization.
Key Responsibilities:
Technical Leadership & Strategy:
Drive architectural decisions, code quality standards, and performance optimizations across Go-based services.
Serve as the technical lead on initiatives that impact the entire platform stack—both software components and cloud infrastructure.
Advocate for and implement industry best practices, guiding team members and stakeholders to adopt efficient, secure, and scalable approaches.
Cross-Team Collaboration & Coordination:
Interface with product managers, security experts, data teams, and other engineering groups to ensure alignment on priorities, timelines, and deliverables.
Mentor and coach junior and mid-level engineers, fostering a culture of learning, professional development, and continuous improvement.
Communicate complex technical concepts clearly to non-technical team members, ensuring that strategic decisions are well-informed and broadly understood.
Infrastructure & DevOps Ownership:
Architect and maintain robust cloud infrastructure for distributed ledger operations, ensuring high availability, low latency, and optimal resource utilization.
Refine and scale CI/CD pipelines, observability systems, and automation scripts to support rapid feature delivery without compromising reliability or security.
Rapidly diagnose and resolve production incidents, proactively implementing preventative measures and incident response best practices.
Qualifications:
Development Expertise:
7+ years of professional software development experience, with at least 3+ years focused on Go in production environments.
Deep understanding of concurrency, memory management, profiling, and optimization in Go.
Proven track record designing, building, and maintaining large-scale, distributed systems.
Infrastructure & Operations Expertise:
5+ years in SRE, DevOps, or infrastructure roles, with demonstrated success managing complex cloud-native systems (AWS, GCP, or Azure).
Proficiency with container orchestration (Kubernetes), infrastructure-as-code tools (Terraform, Ansible), and modern CI/CD pipelines.
Strong observability skill set, including hands-on experience with monitoring, logging, and alerting frameworks (e.g., Prometheus, Grafana, ELK).
Domain Knowledge & Leadership Skills:
Familiarity with blockchain, DAG-based networks, or advanced distributed system concepts is highly desirable.
Exceptional communication skills, with experience facilitating cross-team collaboration and consensus-building.
A proven leader who can mentor engineers, set clear objectives, and cultivate an environment of transparency, accountability, and continuous improvement.
Preferred:
Exposure to cryptographic primitives, P2P networking, and consensus protocols in decentralized systems.
Hands-on experience with performance testing, capacity planning, and advanced debugging in complex, distributed environments.
Experience driving security best practices and governance across application and infrastructure components.
Benefits:
Competitive compensation and comprehensive benefits.
Influence on groundbreaking blockchain technology and the evolution of decentralized networks.
A supportive, dynamic environment that values leadership, innovation, and professional growth.
About the Role:
We are seeking an accomplished Lead Go Developer & DevOps Engineer to take on a strategic, cross-functional leadership position. This unique role sits at the intersection of software development and infrastructure operations. You will not only design and implement cutting-edge, Go-based components for our DAG-powered blockchain but also oversee the cloud infrastructure and automation frameworks that keep our platform resilient, secure, and scalable. As a team leader, you will collaborate closely with product, security, and data teams, championing best practices and ensuring cohesive execution across the engineering organization.
Key Responsibilities:
Technical Leadership & Strategy:
Drive architectural decisions, code quality standards, and performance optimizations across Go-based services.
Serve as the technical lead on initiatives that impact the entire platform stack—both software components and cloud infrastructure.
Advocate for and implement industry best practices, guiding team members and stakeholders to adopt efficient, secure, and scalable approaches.
Cross-Team Collaboration & Coordination:
Interface with product managers, security experts, data teams, and other engineering groups to ensure alignment on priorities, timelines, and deliverables.
Mentor and coach junior and mid-level engineers, fostering a culture of learning, professional development, and continuous improvement.
Communicate complex technical concepts clearly to non-technical team members, ensuring that strategic decisions are well-informed and broadly understood.
Infrastructure & DevOps Ownership:
Architect and maintain robust cloud infrastructure for distributed ledger operations, ensuring high availability, low latency, and optimal resource utilization.
Refine and scale CI/CD pipelines, observability systems, and automation scripts to support rapid feature delivery without compromising reliability or security.
Rapidly diagnose and resolve production incidents, proactively implementing preventative measures and incident response best practices.
Qualifications:
Development Expertise:
7+ years of professional software development experience, with at least 3+ years focused on Go in production environments.
Deep understanding of concurrency, memory management, profiling, and optimization in Go.
Proven track record designing, building, and maintaining large-scale, distributed systems.
Infrastructure & Operations Expertise:
5+ years in SRE, DevOps, or infrastructure roles, with demonstrated success managing complex cloud-native systems (AWS, GCP, or Azure).
Proficiency with container orchestration (Kubernetes), infrastructure-as-code tools (Terraform, Ansible), and modern CI/CD pipelines.
Strong observability skill set, including hands-on experience with monitoring, logging, and alerting frameworks (e.g., Prometheus, Grafana, ELK).
Domain Knowledge & Leadership Skills:
Familiarity with blockchain, DAG-based networks, or advanced distributed system concepts is highly desirable.
Exceptional communication skills, with experience facilitating cross-team collaboration and consensus-building.
A proven leader who can mentor engineers, set clear objectives, and cultivate an environment of transparency, accountability, and continuous improvement.
Preferred:
Exposure to cryptographic primitives, P2P networking, and consensus protocols in decentralized systems.
Hands-on experience with performance testing, capacity planning, and advanced debugging in complex, distributed environments.
Experience driving security best practices and governance across application and infrastructure components.
Benefits:
Competitive compensation and comprehensive benefits.
Influence on groundbreaking blockchain technology and the evolution of decentralized networks.
A supportive, dynamic environment that values leadership, innovation, and professional growth.
Payment in Crypto
Ale Ortiz
Crypto Customer Support Specialist
Mexico City, Mexico
Mexico City, Mexico
Full time
Remote
Job Overview
Sequence is seeking a dedicated Crypto Customer Support Specialist to join our remote team, working European or Asian hours.
As we empower traders worldwide with our trading algorithms.
We need an experienced professional who can deliver exceptional customer service while navigating the dynamic world of cryptocurrency and blockchain technology.
About Sequence
Sequence is a cutting-edge cryptocurrency trading system designed for simplicity and efficiency.
We offer algorithmic trading, low fees, and customizable strategies to traders of all levels.
Responsibilities
Customer Interaction and Support
- Respond promptly to customer inquiries via email (Zendesk).
- Guide users through account setup, verification, and platform navigation.
- Troubleshoot issues related to transactions, deposits, withdrawals, and account security.
- Resolve customer complaints or disputes in line with company policies.
Technical Knowledge and Application
- Simplify complex cryptocurrency trading, exchange issues and blockchain concepts for users of all experience levels.
- Stay informed on crypto market trends, platform updates, and industry developments.
- Assist with transaction verification and compliance-related tasks.
- Identify recurring issues in customer inquiries to inform platform improvements.
Compliance and Security
- Flag and escalate suspicious activities to the compliance team.
- Ensure customer interactions comply with regulatory and company standards.
- Maintain detailed records of customer interactions and follow up on open cases.
- Contribute to creating FAQs, knowledge base articles, and support resources.
Requirements
Experience and Education
- Minimum 3 years of customer support experience in cryptocurrency, fintech, or financial services.
- Strong knowledge of blockchain technology, crypto trading, and digital assets.
- Bachelor’s degree preferred but not required with relevant experience.
Technical Skills
- Deep understanding of cryptocurrency markets and blockchain mechanics.
- Experience with customer service platforms, ticketing systems, or CRM tools.
- Basic troubleshooting skills for crypto transaction issues.
- Proficiency with computers and ability to adapt to new systems quickly.
Personal Qualities
- Fluent in written and verbal English; additional languages are a plus.
- Strong problem-solving skills and attention to detail.
- Ability to explain technical concepts clearly and concisely.
- Empathy, patience, and professionalism when handling customer concerns.
- Adaptability to thrive in a fast-paced, evolving environment.
- Passion for cryptocurrency and trading.
Compensation and Benefits
- Competitive base salary starting at $18,000 USD annually, with higher compensation based on experience and performance - paid in BTC / USDT
- Performance-based bonuses.
- Fully remote work with flexible scheduling for European or Asian hours.
- Collaborative, innovative, and supportive team culture.
Location
- Fully remote position, with a preference for candidates available to work North America / EMEA time zones.
How to Apply
Submit your resume, a cover letter detailing your passion for cryptocurrency and customer support, and any relevant certifications to support@tradewithsequence.com with the subject line "Crypto Customer Support Specialist Application." Applications are reviewed on a rolling basis, and qualified candidates will be contacted for interviews.
Sequence is an equal opportunity employer dedicated to fostering diversity and inclusion in the workplace.
Sequence is seeking a dedicated Crypto Customer Support Specialist to join our remote team, working European or Asian hours.
As we empower traders worldwide with our trading algorithms.
We need an experienced professional who can deliver exceptional customer service while navigating the dynamic world of cryptocurrency and blockchain technology.
About Sequence
Sequence is a cutting-edge cryptocurrency trading system designed for simplicity and efficiency.
We offer algorithmic trading, low fees, and customizable strategies to traders of all levels.
Responsibilities
Customer Interaction and Support
- Respond promptly to customer inquiries via email (Zendesk).
- Guide users through account setup, verification, and platform navigation.
- Troubleshoot issues related to transactions, deposits, withdrawals, and account security.
- Resolve customer complaints or disputes in line with company policies.
Technical Knowledge and Application
- Simplify complex cryptocurrency trading, exchange issues and blockchain concepts for users of all experience levels.
- Stay informed on crypto market trends, platform updates, and industry developments.
- Assist with transaction verification and compliance-related tasks.
- Identify recurring issues in customer inquiries to inform platform improvements.
Compliance and Security
- Flag and escalate suspicious activities to the compliance team.
- Ensure customer interactions comply with regulatory and company standards.
- Maintain detailed records of customer interactions and follow up on open cases.
- Contribute to creating FAQs, knowledge base articles, and support resources.
Requirements
Experience and Education
- Minimum 3 years of customer support experience in cryptocurrency, fintech, or financial services.
- Strong knowledge of blockchain technology, crypto trading, and digital assets.
- Bachelor’s degree preferred but not required with relevant experience.
Technical Skills
- Deep understanding of cryptocurrency markets and blockchain mechanics.
- Experience with customer service platforms, ticketing systems, or CRM tools.
- Basic troubleshooting skills for crypto transaction issues.
- Proficiency with computers and ability to adapt to new systems quickly.
Personal Qualities
- Fluent in written and verbal English; additional languages are a plus.
- Strong problem-solving skills and attention to detail.
- Ability to explain technical concepts clearly and concisely.
- Empathy, patience, and professionalism when handling customer concerns.
- Adaptability to thrive in a fast-paced, evolving environment.
- Passion for cryptocurrency and trading.
Compensation and Benefits
- Competitive base salary starting at $18,000 USD annually, with higher compensation based on experience and performance - paid in BTC / USDT
- Performance-based bonuses.
- Fully remote work with flexible scheduling for European or Asian hours.
- Collaborative, innovative, and supportive team culture.
Location
- Fully remote position, with a preference for candidates available to work North America / EMEA time zones.
How to Apply
Submit your resume, a cover letter detailing your passion for cryptocurrency and customer support, and any relevant certifications to support@tradewithsequence.com with the subject line "Crypto Customer Support Specialist Application." Applications are reviewed on a rolling basis, and qualified candidates will be contacted for interviews.
Sequence is an equal opportunity employer dedicated to fostering diversity and inclusion in the workplace.
Payment in Crypto
ghed santos
Founding Head of Engineering
San Francisco, USA
San Francisco, USA
Full time
Remote
About The Project:The project is a venture-backed stealth mode project having raised $2 million and building a Social Intelligence Engine designed to power smarter, faster crypto trading. We're combining advanced data infrastructure and real-time intelligence to unlock new trading possibilities. About the Role:We're looking for a tech-savvy, investor-facing leader with an engineering background to represent us on the frontlines. This is not a research role it's about amplifying our voice, building relationships, and being the bridge between our technology and the world. Key Responsibilities:1）Represent us externally at hackathons, pitch events, conferences, and investor meetings.2）Be our lead evangelist clearly explaining our tech vision to both technical and non-technical audiences.3）Drive fundraising efforts with compelling presentations, clear strategy narratives, and investor Q&A.4）Partner closely with engineering/product to demo the platform, shape the roadmap, and turn market feedback into action. Requirements:1）Strong engineering background (AI, blockchain, data infrastructure, or similar).2）Proven experience in investor-facing roles, including fundraising and pitching.3）Excellent presentation and communication skills, with a track record of representing projects publicly.4）Experience participating in or leading hackathons, demos, and tech events.5）Understanding of consumer behavior data in gaming and apps is a plus.6）Familiarity with Web3, crypto, and developer communities. Compensation:Competitive salary + equity + team token + and performance-based incentives.
Payment in Crypto
Velora
NFT Lore Weaver/Character Architect (Web3 Storytelling Expert)
Dubai, United Arab Emirates
Dubai, United Arab Emirates
Full time
Remote
We seek a crypto-proven storyteller to craft NFT characters that shape our multichain MMO economy. Your lore will live on-chain, your creations will trade like assets, and your ideas will govern factions across 11+ blockchains.
Responsibilities:
- Design dynamic NFTs with traits tied to DAO votes, token prices & player behavior
- Embed DeFi mechanics into character backstories (e.g., liquidity pools as "magic reservoirs")
- Collaborate with devs to implement ERC-6551 narrative systems
Requirements:
- Shipped 2+ NFT collections (>1 ETH volume) – share contract addresses
- Fluency in Web3 concepts (MEV, bonding curves, ERC-721A)
- Active in NFT communities (Discord roles as proof)
Rewards:
- 3-7% royalties from your NFT sales
- Governance over plotlines via Lore DAO
- 0.5% of all in-game trades involving your work
Responsibilities:
- Design dynamic NFTs with traits tied to DAO votes, token prices & player behavior
- Embed DeFi mechanics into character backstories (e.g., liquidity pools as "magic reservoirs")
- Collaborate with devs to implement ERC-6551 narrative systems
Requirements:
- Shipped 2+ NFT collections (>1 ETH volume) – share contract addresses
- Fluency in Web3 concepts (MEV, bonding curves, ERC-721A)
- Active in NFT communities (Discord roles as proof)
Rewards:
- 3-7% royalties from your NFT sales
- Governance over plotlines via Lore DAO
- 0.5% of all in-game trades involving your work
Payment in Crypto