About Twinstake

Twinstake is a leading institutional staking provider which offers unrivalled knowledge and experience of the institutional market from on our founding heritage coupled with deep crypto expertise and technology from our team of core devs and industry veterans.

We stand out in:

• Compliance and Risk Mitigation
• Non-custodial Solution
• Enhanced Reporting and Data
• Optimised Performance
• Premier Service

About the role

We are seeking a proactive and skilled Senior QA Engineer to maintain and elevate the quality of our backend services, APIs, and frontend applications. This role is crucial in implementing Twinstake’s high standards for security, performance, and user experience, combining hands-on testing with strategic quality management. Key responsibilities include writing and maintaining robust test cases, leading QA for pre-release checks, building testing infrastructure for team-wide use, and providing first-line support for external quality issues reported.

What you’re good at:

• Implementing comprehensive test cases and scenarios that cover functional and non-functional aspects of the backend, API, and frontend services
• Performing detailed pre-release QA to identify defects and validate fixes
• Building and maintaining scalable testing frameworks and tools, including automation where applicable, that support the team’s ability to implement tests
• Developing test environments that are easily accessible and integrated into CI/CD pipelines for a smooth development workflow
• Serving as the primary point of contact for external quality issues, triaging, reproducing, and troubleshooting reported issues to resolution
• Working with the development and product teams to implement continuous improvements based on findings

What you bring:

• Proven experience as a Senior QA Engineer
• Experience in the crypto industry with an understanding of blockchain technologies, experience in staking mechanisms would be a plus
• Expertise with API testing tools (e.g., Postman, SoapUI) and frameworks (e.g., REST Assured, pytest), alongside familiarity with frontend testing tools (e.g., Selenium, Cypress)
• Proficient in scripting for test automation (e.g., Python, JavaScript) and knowledgeable in backend architecture for comprehensive API and database testing
• Experience with CI/CD pipeline integration and test automation within environments like GitHub Actions
• Demonstrated experience in designing and maintaining test automation frameworks that can scale. Ability to set up and document testing environments for easy adoption by the wider team
• Strong analytical skills with a systematic approach to identifying edge cases and building reliable test cases that ensure high-quality software releases
• Excellent problem-solving skills and the ability to work in a fast-paced, dynamic environment
• Strong communication skills and the ability to collaborate effectively with cross-functional teams

What makes you stand out:

• Strong background in setting up, managing, and optimizing metrics which later can be monitored using dashboards, visualizations and alerting tools (e.g. Grafana)
• Deep understanding and hands-on experience with AWS services, including but not limited to EC2, S3, RDS, Lambda, CloudWatch
• Interest in DevOps practices and experience with infrastructure as code (IaC) tools (e.g., AWS CDK, Terraform, Ansible)
• Contributions to open-source projects or active participation in the software development community
• Experience with containerization and orchestration technologies (e.g., Docker, Kubernetes)

What we offer:

• Exposure to innovative technologies in cryptocurrency and blockchain technology
• Great internal growth and development
• Competitive compensation, benefits, and perks
• Flexible hybrid working

About Twinstake

Twinstake is a leading institutional staking provider which offers unrivalled knowledge and experience of the institutional market from on our founding heritage coupled with deep crypto expertise and technology from our team of core devs and industry veterans.

We stand out in:

• Compliance and Risk Mitigation
• Non-custodial Solution
• Enhanced Reporting and Data
• Optimised Performance
• Premier Service

About the role

We are seeking a back-end software engineer for our platform team who is passionate about developing robust and scalable back-end systems. This role is pivotal in building and maintaining the technological backbone of our services, including API development, database management, and CI/CD processes. Your expertise will ensure our platform’s reliability, performance, and alignment with our compliance and risk mitigation strategies.

What you’re good at:

• Design and implement back-end services, including APIs, microservices, and database schemas, to support front-end applications and enhance user experience
• Lead the development and maintenance of CI/CD pipelines to streamline deployment and ensure high-quality code releases
• Manage database migrations and optimizations to ensure data integrity, performance, and scalability
• Collaborate with front-end developers and product managers to define and meet project requirements, creating a seamless workflow between back-end and front-end components
• Advocate for and implement best practices in back-end development, including code reviews, testing, and security measures
• Participate in the planning and execution of DevOps strategies, working towards improving infrastructure automation and monitoring
• Troubleshoot, debug, and upgrade existing systems, ensuring they meet the latest security and technology standards
• Stay abreast of emerging technologies and methodologies in back-end development, CI/CD, DevOps, and the crypto industry to continuously improve our platform

What you bring:

• Proven experience as a back-end developer, with a strong background in developing scalable and secure web applications
• Experience in the crypto industry with an understanding of blockchain technologies and ideally staking mechanisms
• Expertise in back-end languages and frameworks, Python preferred but will also consider other technologies (e.g. Java)
• Solid experience with database design, management, and migration strategies for relational (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB, Cassandra)
• Deep understanding and hands-on experience with AWS services, including but not limited to EC2, S3, RDS, Lambda, CloudWatch
• Proficient in implementing CI/CD pipelines using tools like GitHub Actions
• A strong understanding of API development principles and experience building RESTful services
• Interest in DevOps practices and experience with infrastructure as code (IaC) tools (e.g., AWS CDK, Terraform, Ansible) is highly desirable
• Excellent problem-solving skills and the ability to work in a fast-paced, dynamic environment
• Strong communication skills and the ability to collaborate effectively with cross-functional teams

What makes you stand out:

• Contributions to open-source projects or active participation in the software development community
• Experience with containerization and orchestration technologies (e.g., Docker, Kubernetes)

What we offer:

• Exposure to innovative technologies in cryptocurrency and blockchain technology
• Great internal growth and development
• Competitive compensation, benefits, and perks
• Flexible hybrid working

About Twinstake

Twinstake is a leading institutional staking provider which offers unrivalled knowledge and experience of the institutional market from on our founding heritage coupled with deep crypto expertise and technology from our team of core devs and industry veterans.

We stand out in:

• Compliance and Risk Mitigation
• Non-custodial Solution
• Enhanced Reporting and Data
• Optimised Performance
• Premier Service

About the role

We are seeking a full stack software engineer for our platform team with proven experience in front-end development. This role is essential in creating and maintaining a seamless user experience, contributing to both the client-side and the server-side of our applications. Your expertise will be key in enhancing our platform’s visual appeal and usability, while your backend skills will support our overall system reliability and efficiency.

What you’re good at:

• Design and implement user-friendly front-end applications for both internal team use and external customer interaction.
• Design and implement back-end services, including APIs, micro-services, and database schemas, to support front-end applications and enhance user experience.
• Utilize modern front-end technologies and frameworks to create innovative staking solutions that align with our technical and business requirements.
• Advocate for best practices in front-end development, including code reviews, testing, and continuous integration.
• Stay up-to-date with emerging trends in front-end development, crypto technologies, and blockchain to continuously improve our offerings.

What you bring:

• Proven experience as a front-end developer or similar role, with a strong portfolio of developed applications.
• Expertise in front-end languages and frameworks (e.g., HTML, CSS, JavaScript, React, Vue.js) and working with APIs to serve data from the back-end
• Experience in building applications with a focus on user experience and performance.
• Proven experience in back-end languages and frameworks, Python preferred but will also consider other technologies (e.g. Java)
• Understanding of good software architecture (including cloud-native and serverless architectures).
• Interest in DevOps practices and experience with infrastructure as code (IaC) tools (e.g., AWS CDK, Terraform, Ansible).
• Experience in the crypto industry, with an understanding of blockchain technologies and staking mechanisms.
• Excellent problem-solving skills and the ability to work in a fast-paced, dynamic environment.
• Strong communication skills and the ability to collaborate effectively with cross-functional teams.

What makes you stand out:

• Contributions to open-source projects or active participation in the software development community
• Experience with containerization and orchestration technologies (e.g., Docker, Kubernetes)

What we offer:

• Exposure to innovative technologies in cryptocurrency and blockchain technology
• Great internal growth and development
• Competitive compensation, benefits, and perks
• Flexible hybrid working

ChainLabo is a newly-born, dynamic and innovative company operating at the forefront of blockchain services, specializing in staking services and bare metal validators maintenance. Our starting goal emerged from the need to provide a non-custodial, bare-metal staking service hosted in Swiss data centers (DC). The company’s mission is to ensure the highest levels of security and contribute to the decentralization of blockchain protocols. We also became a verified operator on the SSV Network and SafeStake (currently in testnet) and we are also an operator on Eigenlayer.

As the Senior DevOps Engineer at ChainLabo, you will work closely with the CTO to support us in enhancing our infrastructure with a focus on security, automation, and monitoring. The ideal candidate will bring experience in managing scalable and secure environments, in driving improvements in efficiency through automation and will have the opportunity to explore new blockchain protocols, run testnets, and develop robust infrastructure to support them.

Key Responsibilities:

• Creating, overseeing, and organizing the maintenance of our hosted systems.
• Develop and support tools for automating processes, rolling out updates, tracking performance, and managing operations.
• Oversee and sustain blockchain systems and nodes to guarantee peak efficiency.
• Diagnose and fix problems related to infrastructure and network systems.
• Perform regular on-call shifts and handle emergency situations.
• Deploy and supervise safeguards to secure confidential information.
• Keep informed and enhance security protocols for peer-to-peer networking.
• Develop, update, and share risk evaluations and threat models for all the systems we manage.
• Collaborate with Sales and Business Development on customer-focused projects.
• Preserving both internal and external documentation, as necessary.

Required Competencies:

• 3-5 years of experience in infrastructure or engineering, along with at least 2+ years in a DevOps position
• Genuine interest in crypto
• Strong experience in managing and configuring Debian-based Linux systems
• Practical knowledge of Raspberry Pi
• Proficiency in configuring and maintaining OPNsense Firewall and knowledge of cybersecurity best practices
• Solid background in Docker
• Experience in deploying and managing lightweight Kubernetes (K3s)
• Expertise in developing and maintaining code using Golang
• Knowledge of Ruby-based applications, particularly using Ruby on Rails and deployment tools like Kamal
• Experience with PostgreSQL for managing and optimizing databases
• Familiarity with Grafana and Prometheus for system monitoring and visualization
• Hands-on experience with Terraform, Packer, Ansible, and Molecule for infrastructure automation and orchestration
• Familiarity with GitHub and GitHub Actions for version control and CI/CD pipelines.
• Experience managing blockchain nodes with Eth-Docker, Geth, Nimbus, Nethermind, Lighthouse, and Web3Signer
• An understanding of the SSV protocol for decentralized staking
• Proficiency in English

What We Offer:

• Competitive salary
• Be part of an innovative and dynamic project in one of the most cutting-edge markets today
• Gain valuable experience and grow within the blockchain industry
• Work in a supportive and transparent environment
• Actively contribute to spreading a new and forward-thinking company culture

Join us at ChainLabo and help shape the future of blockchain staking services!

About us:

We’re a forward-thinking team of seasoned professionals committed to pioneering development of the next generation of Web3 infrastructure and tooling products.

With a strategic blend of expertise in cryptography, blockchain, fintech, telecommunications and cybersecurity - we’re commited to driving the innovation and setting new standards in the vibrant Web3 space.

We’re a globally distributed team of 60+ dedicated members coming from diverse cultures and backgrounds, united by a shared purpose and mission of shaping the world as a slightly more autonomous, gentler place.

What we do:

We’re the team behind Presto, a robust platform for seamless deployment and management of zkEVM and optimistic rollups, abstracting away complexity for sustainable mainstream blockchain adoption. In addition, our reliable Stakeway infrastructure and deep expertise - secures $1B of digital assets, helping unlock non-custodial staking opportunities for institutional players.

Join us on our mission!

We’re seeking a dilligent Senior DevOps Engineer to join our Stakeway team and help us on the mission of accelerating staking and digital asset adoption at the institutional level.

Roles and Responsibilities:

• Take ownership of managing the existing Stakeway infrastructure, CI/CD set-up, workload deployment tools, and other in-house tooling
• Work on technical product and solutions roadmaps to devise and implement secure and scalable performance improvements.
• Continuously evaluate and adopt new technologies, tools, and systems to streamline operations and increase infrastructure efficiency
• Monitor system and server performance and health, as well as troubleshoot and report on issues with data centers
• Participate in the operational on-call rotations
• Provide mentorship to junior developers, participate in the hiring process as per the team’s needs, and eventually assume a leadership position within the team

Requirements and needed skills:

• Strong proficiency in deploying and managing container orchestration systems like Kubernetes and Nomad on bare-metal machines
• Familiarity with programming languages, such as Python, Go, and Typescript; demonstrated ability to develop and deploy new features in applications.
• Comprehensive understanding (or resonating passion to learn) of Ansible, Terraform, and Terragrunt
• Exceptional drive and proactive mindset. You are not afraid to step up and take ownership.
• Demonstrated experience in leading engineering teams and concurrent management of multiple high-value projects
• Excellent verbal and written communication skills, with the ability to transfer knowledge in a seemless and engaging manner
• Comfort with Agile framework (Scrum/Kanban)

Nice to have:

• Experience with multi-region, multi-data center setup
• Experience with implementing ISO27001, SOC2 compliance framework
• Experience leading a small DevOps team
• Familiarity and/or strong passion for PoS blockchain ecosystems (e.g. Ethereum, Cosmos, Avalanche, etc.)
• Direct experience with deploying, managing, and troubleshooting in the context of blockchain infrastructure
• Experience working in fast-paced, remote-first startup environments

What we offer:

• Competitive salary and performance-based bonus structure
• High degree of autonomy and opportunity for long-term career growth
• Close collaboration with the teams working on fundamental research and cutting-edge innovation products in Ethereum scaling and broader blockchain technology
• Fully remote and flexible working hours

About us:

We’re a forward-thinking team of seasoned professionals committed to pioneering the development of the next generation of Web3 infrastructure and tooling products.

With a strategic blend of expertise in cryptography, blockchain, fintech, telecommunications, and cybersecurity, we’re committed to driving innovation and setting new standards in the vibrant Web3 space.

We’re a globally distributed team of 60+ dedicated members coming from diverse cultures and backgrounds, united by a shared purpose and mission of shaping the world as a slightly more autonomous, gentler place.

What we do:

We’re the team behind Presto, a robust platform for seamless deployment and management of zkEVM and optimistic rollups, abstracting away complexity for sustainable mainstream blockchain adoption. In addition, our reliable Stakeway infrastructure and deep expertise - secures $1B of digital assets, helping unlock non-custodial staking opportunities for institutional players.

Join us on our mission!

We’re seeking an experienced Blockchain Platform Engineer to join our Presto team and help actively develop our cutting-edge platform product for seamless roll-up deployment and management. In addition to honing your engineering skills (70% coding, 30% DevOps), in this role, you will have the opportunity to learn and excel at the inner workings of different L2 stacks, including Polygon, Optimism, Arbitrum, and more!

Roles and Responsibilities:

• Drive the development (Python, Django) and optimization of the ever-evolving Presto product platform, ensuring pristine performance and customer experience
• Take an active part in contributing to the overall product architecture and propose new functionalities to support innovation at scale
• Deploy smart contracts and devise automation solutions for complex deployment scenarios and utility tasks
• Participate in code reviews and improve code quality by refactoring and increasing test coverage
• Build containerized solutions running in AWS / on bare metal servers, orchestrated by HashiCorp Nomad
• Monitor and upgrade existing rollups to the latest versions
• Participate in (additionally compensated) on-call procedures

Requirements and needed skills:

• Mandatory knowledge of blockchain and smart contract concepts both at the theoretical and code level
• Backend proficiency with Python, Django, REST API, and Celery
• Demonstrated “automate first” mindset with a track record of development/deployment optimization
• Experience designing and deploying containerized applications running in Nomad/Consul cluster; experience working with Docker and cluster management tools
• Experience utilizing monitoring solutions, such as: creating and managing Grafana dashboards, advanced set-up and configuration of Prometheus, etc.
• Excellent verbal and written communication skills, with the ability to transfer knowledge in a seemless and engaging manner

Nice to have:

• Active involvement and contributions to open-source developer communities
• DevOps experience and knowledge of AWS, Terraform, Terragrunt, and Ansible
• Experience developing blockchain platforms and a good understanding of cloud/bare metal infrastructure
• Experience working in fast-paced, remote-first startup environments

What we offer:

• Competitive salary and performance-based bonus structure
• High degree of autonomy and opportunity for long-term career growth
• Close collaboration with the teams working on fundamental research and cutting-edge innovation products in Ethereum scaling and broader blockchain technology
• Fully remote and flexible working hours