Engineer
Barcelona, Spain
Full time
Office
Compensation is not specified
Role
Backend Engineer
Description
Who we are
We are dedicated to simplifying wealth creation. Our company was established in 2014 in Vienna, Austria, with a mission to empower individuals to achieve financial freedom, both in the present and for the future. At the core of our offerings is a user-friendly platform that allows first-time investors and seasoned professionals alike to invest in a variety of assets such as cryptocurrencies, stocks, precious metals, and commodities, regardless of budget, on a 24/7 basis. Operating globally, our diverse team, spread across different geographical locations, serves over 4 million customers, positioning us as one of the most secure and reliable platforms for contemporary investment solutions.
Based in Austria, our products are developed by a dynamic team of individuals who embody a proactive and collaborative work ethic. Through embracing diverse perspectives and fostering innovation, we remain at the forefront of the industry. If you are someone who is innovative, efficient, and eager to make a significant impact, consider joining our transformative team today.
Your role
At Bitpanda Custody, we are creators of Trust Vault, a secure platform for storing crypto assets that provides access to the world of DeFi. As the preferred asset custodian for crypto institutions, we are witnessing growing interest from traditional financial institutions venturing into the crypto space. Via the TrustVault Metamask extension, customers can seamlessly connect their funds for interaction with DeFi applications and exchanges. As a member of the Custody team, you will engage directly with systems responsible for generating, managing, authorizing, signing, and recording transactions on the blockchain. Our focus extends to building wallets for various chains including Bitcoin, Ethereum, Cardano, Ripple, and Solana among others. Consequently, your work will involve delving into the intricacies of constructing and transmitting blockchain transactions and establishing the essential infrastructure to facilitate such processes.
Expect to contribute to tasks such as chain support, blockchain system interaction, design and execution of event-driven and distributed environments on AWS, as well as the implementation of feature roadmaps for internal and external platform users. You will be engaged in the entire software development lifecycle, from conceptualization and design to testing and deployment.
Key responsibilities
- Directly contribute to enhancing features and services related to Bitpanda’s Custody product offerings.
- Develop efficient, scalable, and sustainable solutions for high-performance backend systems employing an event-driven architecture hosted on AWS.
- Collaborate on loosely-coupled microservices that underpin the organization’s core business functions.
- Work alongside a motivated team of adept developers who can guide and support your professional development journey.
Qualifications
- Proficiency in intermediate or advanced Javascript with proficiency in API development.
- Experience with relational and/or NoSQL databases, along with familiarity with API design, websockets, and network communication.
- Basic understanding of event-driven design principles like event streams and message brokers such as Apache Kafka, RabbitMQ, or AWS Event Bridge.
- Familiarity with any of the following areas is advantageous: Typescript, AWS services, trading/markets, blockchain technology, DevOps infrastructure, Infrastructure-as-Code, AI, smart contracts, Cryptonodes, Web3.
Benefits
- Hybrid working model offering 60 Work From Anywhere days.
- Comprehensive compensation package inclusive of participation in our Bitpanda stock option plan.
- Competitive benefits programs and policies guided by a flexibility-centered approach.
- Exclusive perks when engaging in trading activities on Bitpanda.
- Participation in company-wide and team events, both in-person and virtually.
- Access to Bitpanda branded merchandise.
Above all, you will have the invaluable opportunity to learn and advance within Bitpanda to be a part of our journey towards becoming Europe’s leading investment platform.
Bitpanda is deeply committed to fostering an environment characterized by fairness, equality, trust, and mutual respect. We firmly believe that diversity and inclusivity are pivotal to our success, and we are devoted to building a team that reflects a wide array of backgrounds, viewpoints, and competencies.
Skills Required
Bitpanda
Website
www.bitpanda.comCompany size
Not specified
Location
Austria
Description
Not specified
lynn feldman
Senior Frontend Developer
Full time
Remote
At Tenderly, we're not just shaping the future of blockchain technology – we're defining it. As a full-stack Web3 infrastructure platform, we provide multi-network support and a comprehensive ecosystem that covers every aspect of the blockchain journey, from initial encounters to advanced Node solutions and serverless cloud compute functions.Our mission is crystal clear: to empower developers worldwide to harness the full potential of blockchain technology for creating innovative products. With our robust Web3 infrastructure platform, we've already enabled tens of thousands of developers to work more efficiently with blockchain. We thrive on tackling complex challenges head-on, crafting solutions that push the boundaries of what's possible in the blockchain world. From developing bespoke Ethereum Virtual Machine (EVM) implementations to designing proprietary storage layers optimized for our advanced blockchain node solutions, our team is at the forefront of industry innovation. About the RoleAre you ready to revolutionize the user experience in blockchain technology? As a Frontend Engineer at Tenderly, you will play a key role in shaping our platform’s user experience while ensuring the highest standards of quality and performance. Your role will be pivotal in driving excellence in our frontend development. What you’ll do✦ Develop and Maintain: Create and sustain frontend components and features using JavaScript, TypeScript, and React.✦ Collaborate: Work closely with across engineering and product teams to align technical solutions with company objectives, ensuring seamless integration of design and functionality.✦ Architect: Contribute to architectural decisions that drive scalability, performance, and alignment with business priorities, keeping us at the forefront of Web3 innovation.✦ Contribute: Provide technical expertise and support testing and validation efforts to ensure the success of our platform. Our Technology StackAt Tenderly, we leverage a sophisticated technology stack to deliver cutting-edge solutions. As a Frontend Engineer, you’ll work extensively with:- JavaScript- TypeScript- React- Golang (for full-stack collaboration)- Google Cloud Platform- Amazon Web Services- Supporting technologies including PostgreSQL, Kafka, Cassandra, and more About YouWe’re looking for a highly skilled and innovative frontend developer with a passion for creating exceptional user experiences. You should have:✦ Proven Experience: Demonstrated experience in technical roles, showcasing your ability to deliver high-quality software products.✦ Technical Expertise: Mastery of JavaScript, TypeScript, and React, with a deep understanding of modern frontend development practices and tools.✦ Architectural Vision: Strong decision-making skills to drive scalability, extensibility, and performance in our platform.✦ Effective Communication: Excellent communication and teamwork abilities, ensuring effective collaboration and transparent communication channels.What we offerWhy Tenderly?Join us at Tenderly, where our values are not just words on a page but the driving force behind our innovative journey.Fanatic DriveWe're passionately driven to solve our users' problems, tackling challenges with intensity and speed. Our work is our obsession, and we thrive on the fast-paced world of Web3.Underdog MentalityWe love defying the odds, rejecting the status quo, and achieving the impossible. We're on a mission to revolutionize blockchain technology, constantly pushing boundaries.Inward ResponsibilityWe hold ourselves accountable, always striving to improve. We embrace feedback, knowing it drives personal growth and collective success.Intentional CollaborationOur success relies on individual contributions and mutual support. We share ideas openly, trust each other completely, and continuously push each other to excel.Tenderly Transparency™️We believe in open, honest communication. We share knowledge and opinions freely, fostering a culture of accountability and trust.Tenderly is committed to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. To find out more: https://tenderly.co/careers
Winnables
Full Stack Developer (Front End Leaning)
Full time
Remote
Job Description:
Winnables.com is looking for a creative front-end-leaning Full Stack Developer who loves bringing slick, engaging user experiences to life while still caring about the behind-the-scenes details.
You’ll collaborate closely with designers and product leads, iterate quickly on new ideas, and see the direct impact of your work in the hands of players around the world.
If you enjoy mixing imaginative front-end polish with just enough back-end know-how to make the magic happen, we’d love to hear from you.
Key Responsabilities:
Transform design mock-ups and product concepts into polished, responsive game screens, animations, and flows.
Collaborate daily with designers, product leads, and blockchain engineers to prototype, ship, and iterate on new games or new features.
Continuously test, debug, and optimize for performance across devices and network conditions.
Review code, share best practices, and help keep our small codebase clean, secure, and easy to extend.
Use player feedback and analytics to refine existing features and guide new ideas from concept to launch.
Champion accessibility and web-standards compliance, ensuring every player—regardless of device or ability—has a first-class experience.
What You’ll Be Building
Build interactive mini-games that deliver smooth, responsive gameplay.
Create real-time multiplayer features and live game mechanics.
Develop pack-opening systems with eye-catching, engaging animations.
Engineer raffle and lottery-style games that are fully on-chain and provably fair.
Implement Plinko and other physics-based games, tuned for fun and balance.
Craft user-friendly interfaces that perform flawlessly across mobile, tablet, and desktop.
Qualifications:
Tech Stack:
Core: TypeScript · React & Next.js · Node.js · Zustand · WebSockets & REST
Data & Infra: PostgreSQL (Supabase) · Redis · Docker · GitHub
Observability: Grafana · PostHog
Design & Web3: Figma · viem / wagmi
What We're Looking For
Strong experience with TypeScript and modern JavaScript
Solid understanding of React and Next.js ecosystem
Experience building real-time applications with WebSockets
Familiarity with Node.js backend development
Knowledge of PostgreSQL and database design
Experience with responsive design and mobile-first development
Understanding of state management patterns (Zustand experience preferred)
Understanding of web security fundamentals (CSRF protection, secure authentication flows, input validation)
Interest in gaming mechanics and interactive user experience.
Nice to Have
Experience with gaming or interactive application development
Knowledge of blockchain technologies and Web3 integration
Familiarity with monitoring tools (Grafana, PostHog)
Experience with Docker and containerization
Understanding of real-time multiplayer game architecture
Company Description:
Winnables.com is on a mission to re-imagine iGaming through full on-chain transparency. We believe players deserve provably fair odds, transparent math, and no black-box RNGs. Every spin and ticket purchase is recorded immutably on Ethereum, so anyone can audit the outcome, track prize pools, or even build their own analytics on top of our contracts.
All of our games are designed and engineered 100% in-house by a small, senior team that blends game design, cryptography, and smart-contract security. We currently operate two flagship experiences:
Raffles – transparent prize drawings where every ticket lives on-chain, letting players verify fairness before and after the draw.
Loot Packs – blockchain-powered loot boxes that reveal randomized rewards with engaging pack-opening animations.
We’re still just getting started. The roadmap is full of green-field challenges—and real, measurable impact on an industry ripe for change. Join us and help craft the next generation of fair, fun, and truly player-owned gaming.
Winnables.com is looking for a creative front-end-leaning Full Stack Developer who loves bringing slick, engaging user experiences to life while still caring about the behind-the-scenes details.
You’ll collaborate closely with designers and product leads, iterate quickly on new ideas, and see the direct impact of your work in the hands of players around the world.
If you enjoy mixing imaginative front-end polish with just enough back-end know-how to make the magic happen, we’d love to hear from you.
Key Responsabilities:
Transform design mock-ups and product concepts into polished, responsive game screens, animations, and flows.
Collaborate daily with designers, product leads, and blockchain engineers to prototype, ship, and iterate on new games or new features.
Continuously test, debug, and optimize for performance across devices and network conditions.
Review code, share best practices, and help keep our small codebase clean, secure, and easy to extend.
Use player feedback and analytics to refine existing features and guide new ideas from concept to launch.
Champion accessibility and web-standards compliance, ensuring every player—regardless of device or ability—has a first-class experience.
What You’ll Be Building
Build interactive mini-games that deliver smooth, responsive gameplay.
Create real-time multiplayer features and live game mechanics.
Develop pack-opening systems with eye-catching, engaging animations.
Engineer raffle and lottery-style games that are fully on-chain and provably fair.
Implement Plinko and other physics-based games, tuned for fun and balance.
Craft user-friendly interfaces that perform flawlessly across mobile, tablet, and desktop.
Qualifications:
Tech Stack:
Core: TypeScript · React & Next.js · Node.js · Zustand · WebSockets & REST
Data & Infra: PostgreSQL (Supabase) · Redis · Docker · GitHub
Observability: Grafana · PostHog
Design & Web3: Figma · viem / wagmi
What We're Looking For
Strong experience with TypeScript and modern JavaScript
Solid understanding of React and Next.js ecosystem
Experience building real-time applications with WebSockets
Familiarity with Node.js backend development
Knowledge of PostgreSQL and database design
Experience with responsive design and mobile-first development
Understanding of state management patterns (Zustand experience preferred)
Understanding of web security fundamentals (CSRF protection, secure authentication flows, input validation)
Interest in gaming mechanics and interactive user experience.
Nice to Have
Experience with gaming or interactive application development
Knowledge of blockchain technologies and Web3 integration
Familiarity with monitoring tools (Grafana, PostHog)
Experience with Docker and containerization
Understanding of real-time multiplayer game architecture
Company Description:
Winnables.com is on a mission to re-imagine iGaming through full on-chain transparency. We believe players deserve provably fair odds, transparent math, and no black-box RNGs. Every spin and ticket purchase is recorded immutably on Ethereum, so anyone can audit the outcome, track prize pools, or even build their own analytics on top of our contracts.
All of our games are designed and engineered 100% in-house by a small, senior team that blends game design, cryptography, and smart-contract security. We currently operate two flagship experiences:
Raffles – transparent prize drawings where every ticket lives on-chain, letting players verify fairness before and after the draw.
Loot Packs – blockchain-powered loot boxes that reveal randomized rewards with engaging pack-opening animations.
We’re still just getting started. The roadmap is full of green-field challenges—and real, measurable impact on an industry ripe for change. Join us and help craft the next generation of fair, fun, and truly player-owned gaming.
berttha walker
UI/UX Designer
Full time
Remote
UI/UX Designer for SaaS Dashboard (Figma)
Job Summary:
We're building ClearTrack, a lightweight SaaS tool for tracking tasks and performance in remote teams. We're looking for a UI/UX designer to design 6–8 clean, modern dashboard screens (desktop + mobile).
Scope of Work:
1. Design dashboard UI (Task List, Time Tracker, Reports, Settings)
2. Create responsive mockups in Figma
3. Deliver clickable prototype + style guide
4. Collaborate with our developer for smooth handoff
Budget:
Fixed: $800–$1200 (negotiable based on experience)
Requirements:
1. SaaS/dashboard UI design experience
2. Proficiency in Figma
3. Strong communication & fast turnaround
To Apply:
If you're interested, please:
1. Send a short proposal letter explaining why you're a good fit
2. Share your portfolio (SaaS/dashboard preferred)
3. Include your email address
4. Mention your availability and estimated delivery time
Bonus if you have:
Experience designing admin panels or productivity tools
Job Summary:
We're building ClearTrack, a lightweight SaaS tool for tracking tasks and performance in remote teams. We're looking for a UI/UX designer to design 6–8 clean, modern dashboard screens (desktop + mobile).
Scope of Work:
1. Design dashboard UI (Task List, Time Tracker, Reports, Settings)
2. Create responsive mockups in Figma
3. Deliver clickable prototype + style guide
4. Collaborate with our developer for smooth handoff
Budget:
Fixed: $800–$1200 (negotiable based on experience)
Requirements:
1. SaaS/dashboard UI design experience
2. Proficiency in Figma
3. Strong communication & fast turnaround
To Apply:
If you're interested, please:
1. Send a short proposal letter explaining why you're a good fit
2. Share your portfolio (SaaS/dashboard preferred)
3. Include your email address
4. Mention your availability and estimated delivery time
Bonus if you have:
Experience designing admin panels or productivity tools
Payment in Crypto
AXERAT
Back End Developer in AI projects
Singapore
Singapore
Full time
Remote
We are seeking a skilled and proactive AI Integrator to join our team and lead the integration of artificial intelligence technologies into our business operations, products, and services. This role is pivotal in bridging the gap between data science, engineering, and business units, ensuring the seamless deployment, scaling, and optimization of AI-driven solutions.
You will work closely with stakeholders across product, engineering, data science, and operations to identify opportunities for AI integration, manage implementation, and maintain AI systems post-deployment.
Key Responsibilities:
Collaborate with cross-functional teams to identify and prioritize opportunities for AI integration.
Evaluate and select appropriate AI/ML tools, APIs, and frameworks that align with business objectives.
Deploy and integrate AI models into production environments and existing systems (e.g., CRM, ERP, customer support platforms).
Develop automation workflows using AI tools (e.g., ChatGPT, Claude, Azure AI, Google Vertex AI).
Ensure data pipelines, model outputs, and integrations are reliable, secure, and scalable.
Translate business needs into technical requirements for AI systems.
Monitor, troubleshoot, and optimize deployed AI systems for accuracy, performance, and ethical alignment.
Maintain documentation and provide training or support to internal teams on AI tools and capabilities.
Stay current with AI trends, emerging technologies, and best practices.
Required Qualifications:
Certified specialist in AI or Bachelors or Masters degree in Computer Science, Engineering, Data Science, or a related field.
Familiarity with cloud platforms (AWS, GCP, Azure) and their AI services.
Strong understanding of APIs, microservices architecture, and RESTful integration.
Excellent communication skills and ability to translate complex AI concepts for non-technical stakeholders.
Preferred Qualifications:
Experience with GenAI tools like OpenAI (GPT-4), Anthropic Claude, or Google Gemini.
Knowledge of prompt engineering and small language model (SLM) orchestration.
Experience integrating AI into SaaS or enterprise software products.
Background in data security, compliance, and AI ethics.
You will work closely with stakeholders across product, engineering, data science, and operations to identify opportunities for AI integration, manage implementation, and maintain AI systems post-deployment.
Key Responsibilities:
Collaborate with cross-functional teams to identify and prioritize opportunities for AI integration.
Evaluate and select appropriate AI/ML tools, APIs, and frameworks that align with business objectives.
Deploy and integrate AI models into production environments and existing systems (e.g., CRM, ERP, customer support platforms).
Develop automation workflows using AI tools (e.g., ChatGPT, Claude, Azure AI, Google Vertex AI).
Ensure data pipelines, model outputs, and integrations are reliable, secure, and scalable.
Translate business needs into technical requirements for AI systems.
Monitor, troubleshoot, and optimize deployed AI systems for accuracy, performance, and ethical alignment.
Maintain documentation and provide training or support to internal teams on AI tools and capabilities.
Stay current with AI trends, emerging technologies, and best practices.
Required Qualifications:
Certified specialist in AI or Bachelors or Masters degree in Computer Science, Engineering, Data Science, or a related field.
Familiarity with cloud platforms (AWS, GCP, Azure) and their AI services.
Strong understanding of APIs, microservices architecture, and RESTful integration.
Excellent communication skills and ability to translate complex AI concepts for non-technical stakeholders.
Preferred Qualifications:
Experience with GenAI tools like OpenAI (GPT-4), Anthropic Claude, or Google Gemini.
Knowledge of prompt engineering and small language model (SLM) orchestration.
Experience integrating AI into SaaS or enterprise software products.
Background in data security, compliance, and AI ethics.
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