About Symbiotic

At Symbiotic, we are building a permissionless shared security primitive that empowers network builders to shape and personalise their unique restaking implementation. Our goal is to minimise risks while maximising freedom for all you wonderful builders of crypto infrastructure networks. We have a robust developer-centric proposition and we can’t wait to share it with everyone.

You can find more information about what we’re building and how we’re doing it in our docs.

Our People

We’re a tight-knit team of experienced individuals at the forefront of crypto infrastructure. Our backgrounds range from security auditing and smart contract development to node operation, and we’re supported by Paradigm and CyberFund.

We’re on the hunt for talented professionals to join our mission and strengthen our awesome team.

The Role

We are seeking a Senior Smart Contract Engineer to work on our existing smart contract codebase, including core contracts, core extensions, and middleware SDK, as well as develop new upcoming modules.

What You’ll Do

• Work at the intersection of blockchain protocols and smart contracts, contributing to the design and development of EVM-based systems
• Write, optimize, and audit smart contracts in Solidity, with a focus on performance, clarity, and security
• Build and experiment with staking, DeFi, and other protocol-level primitives
• Leverage tools like Foundry and Hardhat for development, testing, and deployment
• Conduct and support security audits, addressing vulnerabilities and integrating best practices
• Collaborate closely with protocol engineers to support integrations across L1 and L2 chains
• Work with web3 libraries like ethers.js, viem, and web3.py for off-chain contract interactions
• Occasionally contribute to related tooling and scripting in Python and TypeScript

Who You Are

• Strong understanding of Ethereum L1/L2 architecture and PoS mechanisms
• Familiar with blockchain primitives such as consensus algorithms and cryptography
• Deep knowledge of EVM internals: execution flow, memory/storage models, gas mechanics, and precompiles
• Expert in Solidity, with exposure to Yul, Vyper, or Huff (a plus)
• Solid grasp of DeFi concepts: DEXes, lending protocols, stablecoins, and staking mechanisms
• Proficient with Foundry, Hardhat, and comfortable working with ethers.js, web3.js, viem, or web3.py
• Strong security mindset, familiar with common attack vectors and the auditing process
• Practical coding experience in Python and JavaScript/TypeScript

Nice to Have

• Experience in compilers development
• Experience in Rust, Go, C/C++
• Experience in protocol development such as L1, L2
• OP stack, Arbitrum knowledge
• Experience with ZK on EVM

Logos is a movement supporting the development of the decentralised web. Logos technologies lay the foundations for a freer internet upon which communities can evolve into network states. Each protocol in the Logos stack seeks to empower its users while upholding civil liberties and fundamental freedoms.   About Vac Vac builds public good protocols for the decentralized web. We do applied research based on which we build protocols, libraries and publications. Vac’s R&D Service Units are integral to supporting IFT projects by researching and developing base components and secure, unbiased protocols. With the IFT’s extensive use of the Nim ecosystem, the Vac Nim Service Unit focuses on the development and maintenance of Nim tooling and core libraries essential for IFT projects.The Nim unit works on critical tools in the Nim ecosystem, including the Nim compiler, Nimble (package manager), and nim-suggest, ensuring they are efficient, reliable, and up-to-date.The Nim unit further plans to maintain core libraries developed by IFT, such as Chronos.The mandate of the Nim unit also includes providing support to IFT projects regarding the use of Nim, identifying and addressing specific project needs and demands related to the Nim ecosystem. The role We’re looking for a skilled Nim developer to help drive the development and maintenance of Nimble, the Nim language server, and core Nim libraries across a range of IFT projects.In this role, you’ll work closely with project teams to consolidate, report, and resolve Nim-related issues and bugs, while also contributing to the ongoing improvement of developer tooling and the Nim ecosystem.The ideal candidate has strong experience with Nim, a solid grasp of language tooling and core programming concepts, and enjoys collaborating across teams to deliver robust solutions.If you’re passionate about open-source development, enjoy tackling complex technical challenges, and want to help shape the future of Nim at IFT, we’d love to hear from you. Key responsibilities

Contribute to the ongoing development and maintenance of Nimble, the official package manager for Nim, ensuring robust dependency management and a smooth developer experience. Address feature requests, resolve bugs, and improve documentation for Nimble to support the Nim ecosystem. Develop, maintain, and extend the Nim language server to improve IDE integration, code completion, error diagnostics, and overall tooling for Nim developers. Help maintain and evolve Nim core libraries. Collaborate with users and contributors to identify and implement enhancements that streamline the developer workflow Monitor, collect, and consolidate Nim-related issues and bugs arising in various IFT projects, and either report or directly address and resolve these issues as appropriate. Act as a liaison between IFT project teams and the Nim core development community, ensuring that feedback and requirements are clearly communicated and tracked.

You ideally will have

Proficiency in Nim programming language, with hands-on experience developing and maintaining Nim projects. Experience with C, C++, Rust, or similar, especially in systems or embedded programming contexts. Solid understanding of data structures and algorithms. Experience with concepts such as parsing, lexing, and semantic analysis, especially as they relate to compilers or language tooling. Familiarity with Nim’s standard library and ecosystem, including asynchronous programming, networking, and multi-threaded programming. Experience maintaining or contributing to package managers or similar developer tooling (e.g., Nimble). Understanding of language server protocols and experience working with or developing language servers. Proficiency in Git. Strong debugging and testing skills, with the ability to identify, report, and resolve issues across multiple projects. Effective communication skills for collaborating across teams and reporting on bugs and issues. Problem-solving ability and attention to detail

Bonus points

Experience working for an open-source organization. Knowledge of type theory and programming language foundations. Experience with peer-to-peer technologies, blockchain, or cryptography. Background in IDE tooling, language tooling, or developer experience improvements

Hiring process

Interview with our POps team Interview with team member from the Vac team Pair programming with team member from the Vac Nim unit Interview with Vac team lead

Compensation The expected compensation range for this role is $100,000 - $150,000 USD annually (negotiable, dependent on how we assess your skills and experience throughout our interview process). We are happy to pay in any mix of fiat/crypto.

Apply Now:

About Vac

Vac builds public good protocols for the decentralized web. We do applied research based on which we build protocols, libraries and publications.

Vac’s R&D Service Units are integral to supporting IFT projects by researching and developing base components and secure, unbiased protocols.

With the IFT’s extensive use of the Nim ecosystem, the Vac Nim Service Unit focuses on the development and maintenance of Nim tooling and core libraries essential for IFT projects. The Nim unit works on critical tools in the Nim ecosystem, including the Nim compiler, Nimble (package manager), and nim-suggest, ensuring they are efficient, reliable, and up-to-date.

The Nim unit further plans to maintain core libraries developed by IFT, such as Chronos.

The mandate of the Nim unit also includes providing support to IFT projects regarding the use of Nim, identifying and addressing specific project needs and demands related to the Nim ecosystem.

The role

We’re looking for a skilled Nim developer to help drive the development and maintenance of Nimble, the Nim language server, and core Nim libraries across a range of IFT projects. In this role, you’ll work closely with project teams to consolidate, report, and resolve Nim-related issues and bugs, while also contributing to the ongoing improvement of developer tooling and the Nim ecosystem.

The ideal candidate has strong experience with Nim, a solid grasp of language tooling and core programming concepts, and enjoys collaborating across teams to deliver robust solutions. If you’re passionate about open-source development, enjoy tackling complex technical challenges, and want to help shape the future of Nim at IFT, we’d love to hear from you.

Key responsibilities

• Contribute to the ongoing development and maintenance of Nimble, the official package manager for Nim, ensuring robust dependency management and a smooth developer experience.
• Address feature requests, resolve bugs, and improve documentation for Nimble to support the Nim ecosystem.
• Develop, maintain, and extend the Nim language server to improve IDE integration, code completion, error diagnostics, and overall tooling for Nim developers.
• Help maintain and evolve Nim core libraries.
• Collaborate with users and contributors to identify and implement enhancements that streamline the developer workflow
• Monitor, collect, and consolidate Nim-related issues and bugs arising in various IFT projects, and either report or directly address and resolve these issues as appropriate.
• Act as a liaison between IFT project teams and the Nim core development community, ensuring that feedback and requirements are clearly communicated and tracked.

You ideally will have

• Proficiency in Nim programming language, with hands-on experience developing and maintaining Nim projects.
• Experience with C, C++, Rust, or similar, especially in systems or embedded programming contexts.
• Solid understanding of data structures and algorithms.
• Experience with concepts such as parsing, lexing, and semantic analysis, especially as they relate to compilers or language tooling.
• Familiarity with Nim’s standard library and ecosystem, including asynchronous programming, networking, and multi-threaded programming.
• Experience maintaining or contributing to package managers or similar developer tooling (e.g., Nimble).
• Understanding of language server protocols and experience working with or developing language servers.
• Proficiency in Git.
• Strong debugging and testing skills, with the ability to identify, report, and resolve issues across multiple projects.
• Effective communication skills for collaborating across teams and reporting on bugs and issues.
• Problem-solving ability and attention to detail

Bonus points

• Experience working for an open-source organization.
• Knowledge of type theory and programming language foundations.
• Experience with peer-to-peer technologies, blockchain, or cryptography.
• Background in IDE tooling, language tooling, or developer experience improvements

Hiring process

• Interview with our POps team
• Interview with team member from the Vac team
• Pair programming with team member from the Vac Nim unit
• Interview with Vac team lead

Compensation

The expected compensation range for this role is $100,000 - $150,000 USD annually (negotiable, dependent on how we assess your skills and experience throughout our interview process). We are happy to pay in any mix of fiat/crypto.

We’re building Tonkeeper, the leading non-custodial wallet in the TON ecosystem, helping users and developers discover dApps and DeFi tools. Tonkeeper Team has also created TON API, the largest platform on TON, and Tonviewer, a top explorer for tracking transactions, tokens and NFTs. With Tonkeeper Mobile, Tonkeeper Pro, TON API and Tonviewer, we make it easy to explore and grow on The Open Network

Our team has plenty of experience in building products for mass adoption, and high-load services, as well as in applying innovative technologies in cryptography and blockchain.

We’re looking for an experienced Swift Developer to help us build and scale Tonkeeper on iOS — a core product in the TON ecosystem.

What You'll Do

• Own the full stack of iOS app development — from UI to internal libraries and APIs.
• Implement cryptographic protocols and integrate SDKs.
• Collaborate closely with a small, experienced team to continuously improve Tonkeeper’s performance, security, and usability.
• Participate in code reviews and contribute to technical documentation.
• Help define and enforce best practices in iOS development and architecture

What We’re Looking For

• 5+ years of experience in iOS development.
• Strong expertise in Swift (experience with C and Objective-C is a plus).
• Solid problem-solving abilities and independence in execution.
• High attention to detail and commitment to clean, maintainable code.
• Bonus: experience with blockchain or cryptography.

Why Join Us

• Tonkeeper is evolving into a super-app — integrating wallets, dApps, DeFi, NFTs, and more in a user-friendly, powerful platform.
• You’ll work alongside TON API and Ton Console, giving your work a strong commercial and developer-facing foundation.
• Our team is actively shaping the TON ecosystem — from open-source contributions to protocol development and community standards.
• We offer minimal bureaucracy, a tight-knit and highly skilled team, and real opportunities for ownership, growth, and ecosystem-wide impact.

What we offer:

• Non-bureaucratic management that focuses on results
• Regular performance reviews to assess your progress
• Compensation for medical expenses
• 20 working days of paid vacation annually
• 7 days off per year
• 14 days of paid sick leave to support your health and recovery when needed
• Access to internal conferences, courses and corporate events

Apply Now:

DFINITY is seeking a Senior Frontend Software Engineer to join the team building Caffeine, an innovative AI-driven no-code platform. Caffeine will empower everyday users to design, develop, and deploy software applications on the Internet Computer (IC), a revolutionary decentralized and serverless alternative to traditional cloud compute platforms. Are you new to decentralization or not an expert in blockchain or cryptography? That’s okay! We have some of the world’s foremost experts and they’re excited to share their knowledge. You bring your awesome skills and help us create something amazing. * Please note that this role requires in-office work from our amazing office in San Francisco 3 days per week. What you’ll work on: You’ll own the complete software development lifecycle for key products, including:

Caffeine: A user-friendly tool empowering both technical and non-technical users to create and deploy SaaS applications using natural language prompts ICP Ninja: A web-based IDE designed for new ICP developers, simplifying and accelerating software development and deployment on the Internet Computer

You’ll primarily work in TypeScript, Node.js, React and other modern frontend technologies. Responsibilities:

Design and develop sophisticated and user-friendly interfaces for enhanced developer and user experiences Take end-to-end ownership of features, from initial concept to final deployment, working closely with designers Play a key role in shaping UI architecture and maintaining shared component libraries Work with backend developers to create well-integrated APIs and system functionalities At times, contribute to backend development (in Rust) to ensure comprehensive product delivery

You May Be a Great Fit If You:

Possess a strong foundation in computer science (degree or equivalent) Have significant experience leading frontend or full-stack engineering initiatives Have a proven track record of shipping web applications for both B2B and B2C audiences Have strong proficiency in modern frontend development using JavaScript/TypeScript and frameworks such as React Are proactive and willing to contribute to backend development as necessary. Prioritize user experience and the creation of maintainable code Can effectively collaborate within a diverse, multi-time zone team environment. Exhibit excellent interpersonal and communication abilities Are excited by the potential of democratizing software engineering and building a more resilient internet

Bonus Points:

Experience working with the Internet Computer or other blockchains   Contributions to open-source projects Experience building products around large language models (LLMs) 

More information about what you'll be working on:

Internet Computer Read about Caffeine in the ICP 2025 Roadmap and watch Where AI Builds to learn more about what this team is working on.  Try icp.ninja to see how the Internet Computer makes developing and deploying applications a streamlined process.

Base Salary Range:  $175,000 - $235,000/yr This position can be considered across multiple levels. Total compensation at DFINITY consists of base salary + generous bonus and is determined based on multiple factors including job leveling, areas of expertise, educational background, geographic location and overall experience.   In addition to the cash components of our offers, we have generous benefits including top tier medical, dental, and vision insurance; disability insurance; life insurance; 401(k); flexible PTO policy in addition to paid holidays.About DFINITY and the Internet Computer:

DFINITY is a leading contributor to the Internet Computer Protocol (ICP), with a mission to bring the world's compute onto the secure ICP network. Built on its unique third-generation blockchain technology, ICP enables the development and operation of a new generation of unstoppable, tamper-proof, fully decentralized web applications. Its powerful technology can run entire AI models within smart contracts, representing a major advancement for secure AI. Through seamless integration with Bitcoin, Ethereum, and other networks, ICP facilitates multi-chain operations for digital assets and web3. Join our team of over 250 talented individuals, including world-renowned cryptographers, distributed systems engineers, programming language experts, and industry leaders, who are shaping the future of the internet and web3.

DFINITY was founded in 2016 by entrepreneur and crypto theoretician, Dominic Williams.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.

Apply Now:

DFINITY is seeking a Senior Backend Software Engineer to join the team building Caffeine, an innovative AI-driven no-code platform. Caffeine will empower everyday users to design, develop, and deploy software applications on the Internet Computer (IC), a revolutionary decentralized and serverless alternative to traditional cloud compute platforms. Are you new to decentralization or not an expert in blockchain or cryptography? That’s okay! We have some of the world’s foremost experts and they’re excited to share their knowledge. You bring your awesome skills and help us create something amazing.* Please note that this role requires in-office work from our amazing office in San Francisco 3 days per week. What you’ll work on: You’ll own the complete software development lifecycle for key products, including:

Caffeine: A user-friendly tool empowering both technical and non-technical users to create and deploy SaaS applications using natural language prompts ICP Ninja: A web-based IDE designed for new ICP developers, simplifying and accelerating software development and deployment on the Internet Computer CaLM (Canister Lifecycle Manager) – a build, deploy, and monitoring service for managing the entire lifecycle of IC smart contracts 

You’ll primarily work in Rust, TypeScript,Node,js, and other modern backend technologies. Responsibilities:

Develop robust, secure, and scalable backend systems and services using Rust and TypeScript Manage the entire feature lifecycle, from initial concept and design through implementation and ongoing support Collaborate with platform engineering teams to deploy and maintain production services Design and implement CI/CD pipelines for rapid product iteration as user adoption increases Collaborate with other engineers and business stakeholders to define and deliver high-impact solutions Mentor fellow engineers to promote knowledge sharing and teamwork. Contribute to frontend codebases (TypeScript) and SDKs as needed to ensure complete product delivery

You might be a great fit if you:

Possess a strong foundation in computer science (degree or equivalent) Have extensive experience leading full-stack engineering projects Demonstrate strong proficiency in modern backend development languages, including TypeScript, Go, Python, and Rust Have experience designing and building REST APIs for B2B and B2C applications Have a proven track record of building distributed systems, developer tools, or user-facing products Are curious and comfortable contributing to frontend development as needed Can effectively collaborate in a multi-disciplinary team across multiple time zones Exhibit excellent interpersonal and communication skills Are passionate about democratizing software engineering and building a more resilient internet

Bonus Points:

Proven experience developing backend applications using Rust Active contributions to open-source software projects Experience in building products leveraging large language models (LLMs) Familiarity with the Internet Computer or other blockchain technologies

More information about what you'll be working on:

Internet Computer Read about Caffeine in the ICP 2025 Roadmap and watch Where AI Builds to learn more about what this team is working on. Try icp.ninja to see how the Internet Computer makes developing and deploying applications a streamlined process.

Base Salary Range:  $175,000 - $235,000/yr This position can be considered across multiple levels. Total compensation at DFINITY consists of base salary + generous bonus and is determined based on multiple factors including job leveling, areas of expertise, educational background, geographic location and overall experience.   In addition to the cash components of our offers, we have generous benefits including top tier medical, dental, and vision insurance; disability insurance; life insurance; 401(k); flexible PTO policy in addition to paid holidays.About DFINITY and the Internet Computer:

DFINITY is a leading contributor to the Internet Computer Protocol (ICP), with a mission to bring the world's compute onto the secure ICP network. Built on its unique third-generation blockchain technology, ICP enables the development and operation of a new generation of unstoppable, tamper-proof, fully decentralized web applications. Its powerful technology can run entire AI models within smart contracts, representing a major advancement for secure AI. Through seamless integration with Bitcoin, Ethereum, and other networks, ICP facilitates multi-chain operations for digital assets and web3. Join our team of over 250 talented individuals, including world-renowned cryptographers, distributed systems engineers, programming language experts, and industry leaders, who are shaping the future of the internet and web3.

DFINITY was founded in 2016 by entrepreneur and crypto theoretician, Dominic Williams.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.

Apply Now: