\nWho is Serotonin\nSerotonin is the premier go-to-market firm for transformative technologies, specializing in marketing, strategy, recruiting, and legal services. Since 2020, we’ve partnered with over 300 clients across AI, consumer tech, digital assets, venture capital, and web3 infrastructure. With a global team of 90+ spanning 15 countries, we provide end-to-end services across public relations, growth marketing, analytics, content, design, and more. At the heart of our operations is the Serotonin Platform, a hub that connects founders and innovators to the resources they need to scale.\n\n\nAbout the Role\nWe are seeking a Workflow Engineer with a sharp focus on leveraging best-in-class AI tools to streamline and elevate operational processes across Serotonin’s global business. In this role, you will be responsible for identifying opportunities, architecting intelligent workflows, and deploying advanced AI-driven solutions that scale with our operations.\nThis role will report directly to the General Partner and collaborate closely with senior leadership to drive automation, reduce manual tasks, and empower Serotonin’s teams with smarter systems and processes.\n\n\n\nResponsibilities\n* Analyze and audit cross-functional workflows to identify automation and optimization opportunities.\n* Research, evaluate, and implement cutting-edge AI tools (e.g., GPT-based systems, RPA, intelligent document processing) to enhance operations.\n* Design, develop, and maintain intelligent workflows using low-code/no-code automation platforms and custom code where needed.\n* Fine-tuning existing LLMs (e.g., GPT models) on internal data to improve performance on specific tasks like summarization, classification, or chatbot interactions.\n* Integrate disparate systems via APIs to ensure seamless data flow and interoperability.\n* Translate business requirements into scalable technical solutions that reduce friction and increase team velocity.\n* Establish metrics and dashboards to monitor workflow performance, reliability, and ROI.\n* Document all systems, integrations, and processes to ensure operational clarity and knowledge sharing.\n* Train and support team leads in adopting new workflows and tools, ensuring long-term sustainability.\n* Stay current on emerging AI and automation technologies and provide recommendations for continuous improvement.\n\n\n\nRequirements\n* 2+ years in a workflow automation, systems engineering, or business process role, with a demonstrated focus on AI tools and technologies.\n* Hands-on experience with AI-powered platforms (e.g., OpenAI, Zapier, Make, UiPath, Retool, LangChain, or similar).\n* Proficiency in scripting languages such as Python or JavaScript, especially for building or customizing AI integrations.\n* Strong understanding of business process modeling, system architecture, and data flow.\n* Proven ability to evaluate tools and technologies to solve operational challenges.\n* Excellent communication skills and the ability to collaborate across technical and non-technical teams.\n* Experience with CRM (e.g., Salesforce, HubSpot), ERP systems, and project management platforms (e.g., Asana, Jira).\n* Familiarity with data visualization and reporting tools (e.g., Looker, Power BI, or Tableau).\n* Self-motivated, highly organized, and excited by the opportunity to help scale a fast-moving, high-impact organization.\n\n\n\nBenefits\n* Competitive Salary\n* Health Insurance - (US Only) \n* Remote Work Environment\n\n\n\n\n\n$60,000 - $90,000 a year\n\nBonus Points – Video Prompt for Workflow Engineer Applicants\nTo significantly strengthen your application, we invite you to record a short video (2–4 minutes) and share it via Loom or a private YouTube link, answering the following prompt:\n\n\nWalk us through a workflow or system you built (or significantly improved) using automation or AI tools.\n\n\nPlease cover:\n- What was the core problem or opportunity you identified?\n- How did you architect the solution and decide which AI tools to use?\n- What results or impact did your solution achieve?\n\n\nThis is a great opportunity to showcase your problem-solving approach, technical thinking, and ability to drive meaningful outcomes through automation. \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Web3, Python, Video, Senior, Legal and Engineer jobs that are similar:\n\n $62,500 — $105,000/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n

\nFlow is a layer one blockchain designed from the ground up as a platform for a new generation of Web3 apps, games, and the digital assets that power them. Flow is home today to millions of users and apps from top tier creators including Genies, Cryptoys, Doodles, and Dapper Labs (NBA, NFL, Disney) as well as industry leaders such as Mattel (Barbie, Hot Wheels), LiveNation / Ticketmaster, and many more.\n\n\nWe're looking for an experienced Senior Software Engineer to help us build the best decentralized computer in the world, and make it ready for mainstream web3 adoption with 1M transactions processed per second and petabytes of non-sharded on-chain state.\n\n\nIn this role you will be working on the core components of Flow protocol, contributing to evolving it’s architecture and design to improve performance, scalability and reliability, ensure autonomous operation and interoperability with wider web3 ecosystem. Flow Execution node is the CPU of Flow - it is responsible for execution of a purpose-designed programming language for writing smart contracts - Cadence. It also stores the on-chain state and generates proofs for verifying correctness of the execution.\n\n\nAs the ideal candidate you are interested in and passionate about pushing the boundaries in development of high-performance decentralized permissionless systems development, working with a fully remote, global team and on open-source software.\n\n\nYou are comfortable with solving ambiguous problems in a rapidly evolving environment and can pivot quickly when necessary. You understand the value of clear, well-tested, documented, easily maintainable and performant code. You understand that working on a high-availability product needs quick problem-solving when things don’t go as planned. You appreciate direct communication.\n\n\n\nWhat we will accomplish together:\n* Build an innovative blockchain as the foundation for an entire ecosystem of consumer applications, starting with games, collectibles, and the apps that interact with them\n* Defy accepted wisdom on the scalability of blockchain platforms\n* Design, develop, and deploy new systems that enhance throughput, latency, availability, and security\n* Maintain, improve and optimize existing systems\n* Support Flow network operations and incidents\n* Ensure that our work is ethical and values-driven to create a positive impact on the world \n\n\n\nAbout you:\n* You are capable of applying your skills across a variety of use cases\n* We believe in processes and the power of planning, but you will often have to roll with the punches and prioritize the most impactful tasks on the fly\n* Experience with distributed systems, scalability, and algorithm engineering experience, preferably in Golang\n* Experienced in building a path to successful delivery from situations with high technical ambiguity, including writing Software Design proposals and building consensus with key stakeholders\n* Experience with building scalable solutions in a resource-constrained environment, performance optimization and profiling\n* Ability to maintain and operate high-availability service\n* Experience with web3 ecosystem and smart contract development\n* Enjoys and understands the nuances of working with a developer community in public\n* Knowledge of byzantine-fault-tolerant system design\n\n\n\n\n\n\nFlow is a remote-first team of seasoned technologists dedicated to our mission of mainstream Web3 adoption. Founded in Vancouver, Canada, Flow’s team is now spread primarily across the US and Canada – with small presences in Europe, Asia, and the Middle East. Less than 6 months from now, Flow delivers Crescendo, its biggest technical upgrade since launching the network. Included in the Crescendo release is Cadence 1.0, a major upgrade of the Cadence programming language which enables fully immutable smart contracts on Flow; as well as full EVM equivalence, allowing Flow to host EVM-based smart contracts, platforms, tooling, and utilities natively and fully composable with the Cadence environments. With Crescendo, Flow will be as easy to deploy onto as any EVM-based Layer 2, while preserving the full capabilities of the rest of the protocol. Crescendo upgrade will catalyze a massive improvement in liquidity on Flow including on- and off-ramps as well as a native DeFi ecosystem that serves as a liquidity backbone for the entire network.\n\n\nAt Flow Foundation, we prioritize recruiting top talent and cultivating an empowering environment for our team. This entails fostering a workplace that is characterized by diversity, inclusivity, and open-mindedness. We enthusiastically welcome applicants from all walks of life, regardless of race, color, religion, sexual orientation, gender identity, national origin, or disability. \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Design, Web3, Node, Senior and Engineer jobs that are similar:\n\n $70,000 — $120,000/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n
\n\n#Location\nRemote, USA Remote, Canada

\nChainSafe is a leading blockchain research and development firm specializing in infrastructure solutions for the decentralized web. Alongside its contributions to significant ecosystems such as Ethereum, Polkadot, Filecoin, Mina, and more, ChainSafe creates solutions for developers and teams across the web3 space utilizing our expertise in bridging, gaming, NFTs, and decentralized storage. As part of the mission to build innovative products for users and better tooling for developers, ChainSafe embodies an open-source and community-oriented ethos.\n\nTo learn more about ChainSafe, look at our Discord, GitHub, and website.\n\nHere’s what you need to know before reading on:\n\n\n* Our progressive tech stack includes Go, Rust, and TypeScript\n\n* We spearhead ecosystem projects like Lodestar, Web3.js, Forest, Mina-rs, and Gossamer\n\n* We are global, remote-friendly, and open to contractors\n\n* You’ll form part of the Sygma Engineering team, our bridging protocol\n\n* At Sygma we believe that cross-chain interoperability is the fundamental enabler for the next wave of growth in the blockchain industry. Sygma will empower builders to create streamlined experiences where users are not confined to one ecosystem. By enabling elaborate cross-chain functionality and putting most of the steps under the hood, Sygma will enable smooth, web2-like user experiences. For more information about Sygma please visit buildwithsygma.com\n\n\n\n\nAt ChainSafe, you’ll be part of a team that believes in the community's vital importance and contributes to advancing humanity with open-source and decentralized technology.\nAbout the role\n\nAs our Senior BlockOps engineer for Sygma, our cross-chain interoperability protocol, you will play a vital role in our dedicated BlockOps team, defining and implementing best-practice strategies and guides to manage and optimize our infrastructure.\n\nThe BlockOps team supports the critical systems, services, and tooling at the foundation of Sygma’s mission, to abstract away all the complexities of cross-chain interoperability to enable users to ‘deposit from anywhere’. We enable Sygma’s engineers to design, develop, and operate services quickly, safely, securely, and reliably. BlockOps teams build and maintain the platforms critical to the existence of Sygma.\n\nYour expertise will undoubtedly contribute to the sophistication of blockchain applications and redefine the boundaries of what's possible within this emerging technological sphere. All work across Sygma will be open-source, ensuring expansive opportunities for deep contribution and collaborative efforts across various web3 blockchains and ecosystems.\nResponsibilities\n\nWhat you will be doing\n\n\n* Ensure reliable operation of the company’s distributed Relayer nodes operations across various blockchain networks (EVM, Substrate, Cosmos SDK) while adhering to internal SLAs and committed KPIs\n\n* Design and implement procedures related to Sygma’s Relayer node operations (deployment and upgrade, incident response, and key management)\n\n* Build monitoring and observability for various Sygma services including a distributed set of relayers and various blockchain full nodes.\n\n* Provide training and guidance for other members of the infrastructure team, ensuring round-the-clock node operation and incident response.\n\n* Document and communicate technical details via open-source documentation\n\n* Collaborate with various internal teams and the wider community to build, expand, and scale Sygma’s architecture, by tapping into new trends and opportunities highlighted by internal data, blockchain research, and the wider blockchain ecosystem\n\n\n\nRequirements\n\n\n* Solid dev. experience with Golang\n\n* Experience working with AWS services\n\n* Demonstrable experience with modern Infrastructure as Code (IaC) tools (Terraform, Helm, Ansible, etc), automating deployment, and best CI/CD practices and tools.\n\n* Experience with monitoring and alerting tools (DataDog, Grafana, Prometheus, etc.)\n\n* Experience implementing distributed tracing, monitoring, and logging systems using OpenTelemetry Protocol\n\n* Experience building and participating in incident response systems (PagerDuty, etc) and handling the emergency response to production environment failures.\n\n* In-depth knowledge of distributed systems and blockchain technology.\n\n* Excellent communication skills with the ability to document and convey technical details clearly\n\n* Ability to work autonomously as well as with the wider team\n\n\n\nAs a plus:\n\n\n* TypeScript, Solidity, or Rust is a big plus\n\n* Experience with specifying, procuring, and setting up infrastructures for Blockchain validator nodes, and managing them across several blockchain networks.\n\n* Experience automating network deployment and testing of SmartContracts with various tools (Truffle, HardHat, Foundry, Anvil)\n\n* Understanding at least two of the following domains - Web Security, Web3 Security, Cloud Security, Systems Security, and Applied Cryptography.\n\n\n\nHiring Steps\n\n\n* Selected candidates will be invited to a 30–to–45–minute screening call with one of our tech recruiters\n\n* Next, candidates will be invited to a 60-minute values interview with one of our team members\n\n* Technical 60-minute interview with one of our engineers\n\n* Then, candidates will be asked to complete a technical task in under 10-15 hours, but we provide up to 5 business days to complete it\n\n* After the completion of the test assignment call with Engineering team to discuss the results, for 60 minutes.\n\n* Lastly, candidates will be invited to a 60-minute interview with the hiring team members\n\n\n\n\nWhy Join ChainSafe\n\nFounded by developers for developers, ChainSafe is a remote-first company with an international team. We continue to provide opportunities for personal and professional growth, value autonomy and responsibility, have a results-driven environment, and offer flexible work hours.\n\nWe care deeply about our values and look for these attributes in every new team member. In addition, we recognize the benefits of cultivating a diverse team and aspire to embed respect for all people into our culture. We encourage women, the LGBTQIA+ community, people of colour, and members of any other group underrepresented in the blockchain space (or tech in general) to apply.\n\nHow to Apply\n\nPlease fill out the Greenhouse application form below and ensure that you attach your resume and link your Github/Gitlab profile or any software project you have contributed to (if applicable).\n\n\n\n\n\n  \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Web3, Testing, Cloud, Node, Senior and Engineer jobs that are similar:\n\n $60,000 — $97,500/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n
\n\n#Location\nBerlin, Berlin, Germany