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

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 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

About us

Ambush is an AI company developing AI research & products that accelerate onchain adoption.

We’re building Web3’s first autonomous AI agents to simplify wealth creation & onchain safety.

We’re a lean & hyper performance-oriented team; we are competitive, we like moving fast, and we run head-first towards seemingly impossible ideas. Our entire team is crypto-native & we have a shared North Star of solving web3’s hardest challenges.

Our team is led by one of crypto’s prominent anons, Psycho.

About the role:

We’re hiring a crypto-native backend engineer with proven experience building performant backends & infra for high-growth products that have achieved massive scale.

As our lead backend engineer, you will work directly alongside the CTO to help ensure that our infrastructure & backend is being built to support demanding requirements for performance, security, and scalability.

Because we are an AI company building onchain products, the ideal candidate has a strong general interest in DeFi, and uses LLMs such as GPT, Cursor, Co-pilot, or similar in their daily engineering work flow.

Requirements:

• 4+ years using Golang in production environment
• Crypto-native with prior experience building products in web3
• Experience working with AWS cloud services (e.g., SQS, SNS, RDS, Aurora, Cloud Functions, Lambda)
• Experience with microservices architectures and event-driven systems
• Experience in infrastructure as code using Terraform
• Solid understanding of PostgreSQL
• Hands-on experience with software engineering principles covering automation, testing, CI/CD pipelines, containerization, and cloud technologies
• Familiarity with monitoring and analytics tools like Grafana
• Experience in designing, developing, and maintaining scalable, resilient large-scale production applications in distributed environments

Responsibilities:

• Write well-documented APIs for cross-functional teams to consume
• Contribute to in-depth architectural decisions
• Design, develop, and maintain microservices-based systems
• Manage infrastructure using Terraform in AWS environments
• Maintain a high-quality production environment using AWS services

Not required, but a strong bonus:

• Prior commercial experience as a smart contract dev or security auditor
• Strong Python skills

Why join Ambush?

• Industry leading pay: strong base salary + uncapped profit share + equity
• Lean & high-impact team; we hate bureaucracy & will not grow past ~10 people
• One of the fastest growing AI companies in crypto
• Proven leadership team with several acquisitions under their belt

Internal full-time hires only, no contractors or agencies

Cryptio

Cryptio is an enterprise-grade crypto back-office platform. Our software helps financial institutions, corporates and crypto-native companies navigate the fragmented digital-asset landscape with confidence. We are a Series-A company, backed by tier-1 crypto and non crypto investors: Point Nine, BlueYard, Tim Draper, Alven, Aave, Consensys, Outlier Ventures. Some of our clients include top crypto companies like Uniswap or Metamask as well as banks and governments.

We're tackling one of the biggest challenges in crypto right now - building the infrastructure to help institutional adoption. And we're playing to win.

Location

This is a fully remote position, ideally located in the UK or France but we're open to exploring Europe for the right candidate depending on location. You should be able to easily join one of our hubs from time to time. Our hubs are Paris, London, and New-York.

Summary

Cryptio is looking for a Lead Software Engineer interested in working on crypto / finance / accounting related products.

You will join a team of talented engineers working on Cryptio’s Integrations Squad. The mission of this team is to integrate our suite of products with external systems like third party exchanges (eg. Coinbase), digital assets custodians (eg. BitGo), order management systems (eg. Wyden) and internal databases (eg. Snowflake).

Technologies used:

• Languages: Typescript (key dependencies: Axios, Zod, Nest.js)

• Infrastructure: Kubernetes, Docker, Gitlab, Grafana, Redis, S3

• Cloud: AWS

• And more!

Overview

You will play a crucial role in creating reliable, scalable connections between our platform and an ever-evolving network of exchanges, custodians, and financial systems. This role requires tackling the complexities of integrating with dynamic, often fragmented data sources and protocols unique to the cryptocurrency industry.

The crypto ecosystem is fast-paced, with constant changes in APIs, regulatory standards, and platform-specific data structures. Our customers rely on Cryptio to have seamless, accurate data connections to help them navigate their financial operations confidently. As part of our integration team, you’ll be responsible for designing and implementing robust solutions to handle real-time data syncing, overcoming challenges like data discrepancies, and building systems that are both secure and compliant with financial regulations.

Responsibilities

• Lead the design, development, and maintenance of back-end services for integration with third-party crypto exchanges, custodians, and financial platforms

• Drive architectural decisions to ensure scalability, reliability, and security, supporting the rapid growth of Cryptio’s integration capabilities.

• Oversee code quality by conducting code reviews, providing feedback, and ensuring adherence to best practices

• Mentor and support the technical growth of engineers on the team

• Work closely with product and engineering leadership to align integration projects with Cryptio’s strategic goals

• Monitor and troubleshoot integration issues, proactively implementing improvements and maintaining data accuracy

Requirements

• 5+ years of experience in software engineering, including 1+ year of experience as a Team Lead

• Deep knowledge of Typescript

• Extensive experience dealing with third party APIs (REST, GraphQL)

• Knowledge of OAuth, JWT, signature mechanisms and other authorization and authentication methods often used with APIs

• Impeccable spoken and written English

• Exceptional communication skills and a passion for mentoring and developing engineering talent

• Thriving when working with others - collaboration is paramount for this role

• An analytical mindset, a passion for solving complex problems, and an interest in the crypto and fintech industry

Benefits

✨ Fully-Remote / Hybrid – The choice is yours! 🌍🏡

🎉 25 Days Paid Holiday + Bank Holidays + Your Birthday Off 🎂

💰 4% Pension Contributions towards your future! 💼

🏥 Private Medical & Dental Insurance with Allianz! 🦷💊

👶 Attractive Maternity and Paternity Policies for your growing family 👨‍👩‍👧‍👦

💪 Gym Classes or Spa Treatments with ClassPass! 🧘‍♂️🧖‍♀️

💻 Apple MacBook Pro – The best tech at your fingertips! 💻✨

💵 $200 Workplace Budget to create your perfect home office! 🏠💼

📚 Training and Development Budget – Invest in yourself and grow! 🚀

Apply Now:

Cryptio

Cryptio is an enterprise-grade crypto back-office platform. Our software helps financial institutions, corporates and crypto-native companies navigate the fragmented digital-asset landscape with confidence. We are a Series-A company, backed by tier-1 crypto and non crypto investors: Point Nine, BlueYard, Tim Draper, Alven, Aave, Consensys, Outlier Ventures. Some of our clients include top crypto companies like Uniswap or Metamask as well as banks and governments.

We're tackling one of the biggest challenges in crypto right now - building the infrastructure to help institutional adoption. And we're playing to win.

Location

This is a fully remote position, ideally located in the UK or France but we're open to exploring Europe for the right candidate depending on location. You should be able to easily join one of our hubs from time to time. Our hubs are Paris, London, and New-York.

Summary

Cryptio is looking for an intermediate Software Engineer interested in working on crypto / finance / accounting related products.

You will join a team of talented engineers working on Cryptio’s Integrations Squad. The mission of this team is to integrate our SaaS platform with third party exchanges (Coinbase, Binance…), custodians (BitGo, Fireblocks…) or order and execution management systems (Talos, Wyden…).

Technologies used:

• Languages: Typescript (key dependencies: Axios, Zod, Nest.js)

• Infrastructure: Kubernetes, Docker, Gitlab, Grafana, Redis, S3

• Cloud: AWS

• And more!

Overview

You will play a crucial role in creating reliable, scalable connections between our platform and an ever-evolving network of exchanges, custodians, and financial systems. This role requires tackling the complexities of integrating with dynamic, often fragmented data sources and protocols unique to the cryptocurrency industry.

The crypto ecosystem is fast-paced, with constant changes in APIs, regulatory standards, and platform-specific data structures. Our customers rely on Cryptio to have seamless, accurate data connections to help them navigate their financial operations confidently. As part of our integration team, you’ll be responsible for designing and implementing robust solutions to handle real-time data syncing, overcoming challenges like data discrepancies, and building systems that are both secure and compliant with financial regulations.

Responsibilities

• Write production-grade Typescript code

• Implement new integrations and maintain existing ones

• Document and test your code

• Work closely with product teams to ensure new integrations meet user needs

• Tackle data inconsistencies and map various data structures to a unified data model

• Monitor integrations health, identify issues proactively, and implement fixes and improvements to maintain data accuracy and availability

• Collaborate with other engineers and contribute to architecture decisions to enhance scalability and reliability

Requirements

• 3+ years of experience writing software

• Production experience with Typescript

• Some experience dealing with third party APIs (REST, GraphQL)

• Knowledge of OAuth, JWT, signature mechanisms and other authorization and authentication methods often used with APIs

• Impeccable spoken and written English

• Great communication, with both technical and non-technical stakeholders

• Thriving when working with others - collaboration is paramount for this role

• An analytical mindset, a passion for solving complex problems, and an interest in the crypto and fintech industry

Benefits

✨ Fully-Remote / Hybrid – The choice is yours! 🌍🏡

🎉 25 Days Paid Holiday + Bank Holidays + Your Birthday Off 🎂

💰 4% Pension Contributions towards your future! 💼

🏥 Private Medical & Dental Insurance with Allianz! 🦷💊

👶 Attractive Maternity and Paternity Policies for your growing family 👨‍👩‍👧‍👦

💪 Gym Classes or Spa Treatments with ClassPass! 🧘‍♂️🧖‍♀️

💻 Apple MacBook Pro – The best tech at your fingertips! 💻✨

💵 $200 Workplace Budget to create your perfect home office! 🏠💼

📚 Training and Development Budget – Invest in yourself and grow! 🚀

Apply Now: