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Crypto JavaScript Jobs
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Latest Web3 JavaScript Jobs:
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Backend Engineer @ Symphony (prev Cadence)
- 4+ years of backend engineering
- DeFi experience
- Proficiency in Javascript/Typescript
- Microservices experience
- Front end and smart contract experience is a plus
- A passion for shaping the future of finance
- Opportunity. We believe DeFi should be fast AND accessible. You’ll do high-impact work to enhance scalability, shaping the future of crypto
- Flexibility. We are a remote-first company, and collaborate synchronously and asynchronously, via daily all-hands meetings
- Culture. As an early member of our team, you’ll have a unique opportunity to help shape our culture. We value intellectual honesty, bias towards action, and believe every member plays a key role in achieving our ambitious goals
- Compensation. We offer a competitive salary + equity + benefits package
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Senior Backend Engineer @ Calyptus
- had demonstrable full-stack technical skills in frontend as well as web3 backend and infrastructure, ideally via open-source code, or strong referrals if failing that.
- has a good conceptual understanding of the architecture of EVM nodes, as well as the architecture of L2 rollups (in particular optimistic rollups), and understands EVM transaction lifecycles, including issues around transaction inclusion, nonce management, gas estimation, etc.
- knows the best practices around building, hosting & securing traditional cloud/server software.
- is able to read & write Javascript, Typescript, as well as at least one low-level language (Go & Rust preferred). Must be willing to pick up new languages if we decide to use them.
- is well-read and knowledgeable in new blockchain infra-side technology like account abstraction, gas sponsorship, MPC wallets, …
- likes reviewing code and strive for continuous improvement of our codebase and engineering practices. This will be one of the biggest parts of the job on the technical side, so make sure you’re up for it.
- has experience leading technical teams as a tech lead or engineering manager, preferably in web3.
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Staff Backend Engineer @ P2P.org
- Architecting and developing high-performance, secure backend services for our Platform
- Implementing robust monitoring and alerting systems to maintain high standards with reliability and operational excellence
- Collaborating with product managers and blockchain engineers to translate complex blockchain-specific requirements into scalable technical solutions
- Mentoring engineers and driving the adoption of best practices in software engineering
- Lead the design and implementation of scalable backend systems for our Platform, focusing on high performance, security, and reliability
- Architect and develop APIs for our Platform API product, ensuring seamless integration for institutional clients
- Drive the adoption of best practices in software development, including code reviews, testing, and continuous integration/deployment
- Collaborate with cross-functional teams to align technical solutions with business goals and client needs
- Mentor engineers and promote a culture of knowledge sharing and engineering excellence
- 8+ years of experience in backend architecture design and development, with a focus on distributed systems and high-load applications.
- Expertise in TypeScript/JavaScript and Go for building scalable and maintainable backend applications
- Experience with containerization technologies like Docker and orchestration tools like Kubernetes
- Proficiency in both SQL and NoSQL databases, with experience in design data storages and optimizing database performance
- Familiarity with cloud platforms (GCP, AWS) and ability to design cloud-native applications.
- Excellent problem-solving skills and ability to diagnose complex system issues
- Strong communication skills and experience working in distributed teams
- Bachelor’s or higher degree in Computer Science, Engineering, or related field
- Fluent English (C1 level or above)
- Experience with blockchain technologies
- Familiarity with cryptography and blockchain security principles
- Experience with smart contract development and auditing
- Experience with modern frontend frameworks like Next.js, React, or Angular
- Contributions to open-source blockchain projects
- Remote working from any part of the world
- Work from anywhere in the world: an international distributed team
- Competitive salary level in $
- Well-being program
- Mental Health care program
- Compensation for education, including foreign language study programs & professional growth courses
- Equipment & co-working reimbursement program
- Overseas conferences, community immersion
- Positive and friendly communication culture
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Senior UI Developer @ Fidelity Investments
- Experience developing and maintaining applications written using modern JavaScript frameworks (Angular, Vue, React JS), Angular experience is preferred
- A proven, practical understanding of JavaScript and TypeScript
- Proficiency using HTML and CSS, including an understanding of accessibility needs and cross-browser compatibility
- Experience working with Git/Version control
- Ability to work with a variety of individuals and groups, both in person and virtually, in a constructive and collaborative manner
- Ability to apply a long-term mentality to help produce scalable, maintainable solutions
- Experience developing and designing your own user interfaces using wireframes, visual designs and UX specifications & principles
- Commitment to quality and high standards
- Be excited about collaborating and communicating closely with teams and other partners
- The desire to learn and grow. To seek out ways to challenge yourself and expand your knowledge of both the business and the technology you work with
- Good communication (written and verbal) and interpersonal skills
- Able to understand a complex and global systems environment
- Working knowledge of basic investment terms and practices is desirable
- Experience working with CI/CD pipelines and driving automation
- 5+ years of professional software development experience
- You adopt customer-first mentality and enjoy developing user-friendly web applications that solve real life problems
- An understanding or familiarity with financial technology and the stock market
- Experience using Figma or similar tools to design user interfaces
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Software Engineer, Frontend @ Goldsky
- Develop User Interfaces: Create and maintain intuitive and responsive user interfaces that allow users to easily interact with complex data-driven applications. You’ll be building the frontend for our cutting-edge Web3 data products.
- Collaborate with Design and Product Teams: Work closely with our design and product teams to translate wireframes and prototypes into high-quality code. You’ll ensure that the user experience is cohesive, accessible, and performant.
- Optimize Performance: Identify bottlenecks and ensure our web applications are fast, responsive, and optimized for all users. This includes optimizing load times and managing state efficiently.
- Problem-Solve on the Fly: We’re building sophisticated tools in a completely new industry, where there are many things to discover. Problems will arise that have never been solved, and you’ll be able to figure out the “good enough” solution consistently as we run into lots of novel technical challenges. You have the drive to work through hard problems, the curiosity to dig deeper and understand the root cause of a problem, and the grit to iterate through first attempts that lead to the right solution over time.
- Build Systems Incrementally: As we grow, we are looking to build incrementally but with a strong vision for the future architecture. While we actively embrace ‘throw-away work’ when the situation demands, we’re at a point where sustainable scaling is important, and we’re looking for someone who can walk that balance.
- You are passionate about building clean, scalable, and maintainable frontend architectures. You should have experience with modern frontend frameworks such as JavaScript, TypeScript, React, Svelte, and other tools.
- You enjoy the high-level strategy work as well as the implementation, and you get excited about seeing users interact with the interfaces you’ve built.
- You’re curious, low ego, and always looking to improve. You experiment with strategies, tactics, and tools in order to identify what works, and you adjust to find repeatable success. You’re open to feedback and collaborating with others to get to the best approach.
- You’re hungry and excited to join a high-growth, fast-paced startup where you’ll get your hands dirty across a range of challenges. You’re comfortable in an ambiguous, remote environment without much structure.
- You enjoy building long-term relationships with teammates and customers.
- You’re open and curious to learn more about this wacky world of crypto :)
- You also feel comfortable with backend or data engineering. Though not explicitly required, the more you can get your hands on — the better!
- You’ve worked with highly technical products and customers; even better if you’ve worked in B2B SaaS.
- You’re crypto native, familiar with the broader ecosystem, and understand why Goldsky will unlock new experiences and applications in Web3.
- Competitive salary and equity in Goldsky.
- Fully paid health plans for U.S. based employees — This includes medical, dental, and vision coverage for you and your family at no cost to you.
- Unlimited vacation - Take time to recharge as you need it. We’re serious.
- Home office setup fund - Expense up to $2,000 for home office equipment (e.g. desk, chair)
- Company provided laptop - we’ll make sure you’ve got the hardware to keep up with you
- Wellness stipend - Expense up to $100/mo on whatever helps you stay healthy.
- Connectivity stipend - Expense up to $75/mo on phone or internet.
- Regular self-care days - Every other Friday is a company holiday to decompress. We go hiking, learn to cook, or trade jpegs.
- Paid travel - We’ll cover any costs for work-related conferences and quarterly company offsites all around the globe.
- Nice swag - We have a free internal Shopify store set up!
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CTO @ Seedefy
- Lead the design and development of our token ecosystem using Solidity
- Oversee the technical aspects of our ICO, ensuring security and compliance
- Manage and mentor our development team
- Collaborate with the executive team to align technology strategy with business goals
- Stay current with blockchain trends and implement cutting-edge solutions
- Work closely with the Business Development and Events team to support technical aspects of marketing strategies and events
- Contribute to market research efforts to identify new business opportunities in the blockchain space
- Participate in virtual networking events and workshops as a technical representative
- Collaborate with sales, product, and design teams to deliver project outcomes effectively
- 5+ years delivering software to real users, ideally in a fast-paced startup environment
- Expert-level Solidity experience, including the design and optimization of advanced smart contract systems
- Familiarity with or contributions to Ethereum EIPs
- Proven experience as a CTO or similar leadership role in a blockchain company
- Successful track record of leading ICOs and token launches
- Excellent communication and team leadership skills
- Excellent English and technical communication - both written and oral
- Understanding of how to work in an agile environment
- Google workspace (Docs, Drive, Slides), and familiarity with online marketing software (e.g., CRM tools, Online analytics)
- Degree in Computer Science, Software Engineering, or a related technical field
- Experience working with or in Southeast Asian markets, particularly Vietnam
- Strong foundation in smart contract security, with a history of successful audits and knowledge of common vulnerabilities
- Demonstrated experience using Go or Rust
- Remote position (preferably based in CET or SGT timezone)
- Flexible working hours, with an expectation of 24-32 hours per week dedicated to Seedefy
- Collaborative work with a cross-functional, global team
- 80% in Seedefy tokens
- 20% in cash salary
- Competitive total package commensurate with experience
- Note: Exact compensation details to be discussed during the interview process
- Opportunity to work at the forefront of blockchain and venture capital technology
- Attend industry-specific virtual conferences and events
- Networking opportunities with global venture capital firms and startups
- Potential for expanded role and responsibilities as the company grows
Symphony (prev Cadence) is hiring a Backend Engineer 
Come join the team as one of our very first employees! You will be working alongside the founding team and play a crucial role in reshaping the future of DeFi. Our team is composed of former Consensys, MetaMask, Kraken, and Axelar veterans and we’re backed by top investors and angels, with a mission to make DeFi accessible and scalable to all.
Qualifications
The total compensation package (base salary and equity) for this role ranges from $80,000 up to $200,000, with additional company benefits. The pay range provided reflects individual compensation based on factors such as work location, assessed job-related skills, experience, and relevant education or training.
Join the Symphony team
Symphony is the world’s first vertical infrastructure stack that enables anyone to execute anything across all chains and protocols without being burdened by bridges, multiple wallets, gas fees, etc, with a goal to unify the hundreds of chains, thousands of protocols and billions of scattered liquidity. On top of this innovative infra we are launching our first consumer focused app in the perpetuals space, which you will be building with us.
We are looking for an innovative and passionate engineer who is excited about building the future of accessible crypto applications, feels comfortable challenging opinions, and most importantly who shares with us the same desire to make DeFi useable.
Apply with email
admin@cadenceprotocol.ioPlease let Symphony (prev Cadence) know you found this position on CryptoJobster.com as a way to support us so we can keep providing you with quality crypto jobs.
Calyptus is hiring a Senior Backend Engineer
As a non-exhaustive list of desirable traits, the ideal candidate:
The ideal candidate:
Apply now
Please let Calyptus know you found this position on CryptoJobster.com as a way to support us so we can keep providing you with quality crypto jobs.
P2P.org is hiring a Staff Backend Engineer
As a Staff Backend Engineer at P2P.org, you will be responsible for the technical leadership of our Platform backend. Your role involves:
Your work will directly impact the reliability, performance, and security of P2P.org’s Platform services, playing a crucial role in our position as a Top-3 Non-Custodial staking provider in the global market.
Responsibilities
Requirements
Nice to have:
Conditions
At P2P.org we have a team of experts with their own unique approach and ownership culture. Together we gain experience and make dreams come true! 🌟
P2P.org is an equal opportunity employer. All applicants will be considered for employment without regard to race, color, national origin, religion, sex, sexual orientation, gender identity, veteran status, or disability.
Apply now
Please let P2P.org know you found this position on CryptoJobster.com as a way to support us so we can keep providing you with quality crypto jobs.
Fidelity Investments is hiring a Senior UI Developer
The Purpose of This Role
As part of the Green Meadows program within the Fidelity Center for Applied Technologies (FCAT), the candidate will be part of a team which is focused on building a modern brokerage platform from scratch. FCAT is embarking upon a unique journey which typically happens only once every 20-30 years within an organization to build a new Brokerage platform from the ground up. This new platform will be completely on the cloud and will provide various new additional & improved features to the end customer.
The Value You Deliver
The ideal candidate will play the role of a Senior Developer for the squad that builds the web applications for Operations users and end customers. The candidate is expected to design and develop features, manage code reviews & deployments, and coordinate with various collaborators for development. The candidate will have an opportunity to work in fast paced core-brokerage financial industry domain along with an opportunity to learn new functionality and technology.
The Skills that are Key to this role
Your experience with the following will be a plus:
How Your Work Impacts the Organization
At Fidelity, we are focused on making our financial expertise broadly accessible and effective in helping people live the lives they want— from the 23 million people investing their life savings, to the 20,000 businesses managing their employee benefits programs, to the10,000 advisors and institutions needing innovative technology solutions to invest their clients’ money. To do this well, as a privately held company, we place a high degree of value in nurturing a work environment that attracts the best talent and reflects our commitment to being an employer of choice.
FCAT – Fidelity Center of Applied Technology – is a centralized function whose mandate is to catalyze innovation across the firm. Our FCAT teams’ prototype and pilot new businesses and capabilities that continue to distinguish our brand as the best customer experience in the financial services industry. These teams focus on exploring big industry game-changing technologies such as crypto currencies, artificial intelligence, virtual/augmented reality & cloud computing. Additionally, FCAT’s world class research team identifies trends and works with partners across the innovation ecosystem to “bring the outside in.” We collaborate with MIT, Harvard, Stanford and other academic institutions, and partner with Accelerators, Start Ups and other industry leaders to drive new ideas and innovation practices across the firm.
Company Overview
Fidelity Investments is a privately held company with a mission to strengthen the financial well-being of our clients. We help people invest and plan for their future. We assist companies and non-profit organizations in delivering benefits to their employees. And we provide institutions and independent advisors with investment and technology solutions to help invest their own clients’ money.
Apply now
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Goldsky is hiring a Software Engineer, Frontend
About Goldsky
At Goldsky, our vision is simple: Build the most powerful data platform for Web3 ☀️.
Blockchains will enable a new era of unique onchain experiences and applications. However, today it’s impossible to build high-quality products due to the difficulties of processing onchain data effectively. This complexity is only increasing as more chains and smart contracts are deployed across the ecosystem. Teams are forced to build complex data infrastructure in-house, distracting them from focusing on their core product.
Goldsky bridges this gap by making it seamless for developers to power their applications with realtime onchain data. Our infrastructure powers hundreds of projects across the industry building rich, instant, data-driven experiences.
We’ve raised over $20M from Dragonfly Capital, Felicis Ventures, prominent players in the industry such as 0x Labs, Uniswap Labs, and Protocol Labs, and angel investors including Elad Gil, Plaid founders Zach Perret and William Hockey, and Zhuoxun Yin of Magic Eden. Our team members have previously built mission-critical, scalable infrastructure at Meta, Google, Shopify, Activision, and more.
We’d love for you to join us in our mission to unlock the full potential of data in Web3.
About the Role
We launched our first product, Subgraphs, last year. Since then, we’ve onboarded hundreds of customers to the platform, including Zora, Optimism, POAP, NounsDAO, 0x Labs, Immutable, Hashflow, Arweave, and Polymarket, among others.
Recently, we began rolling out access to Mirror, an end-to-end data pipeline solution for streaming onchain data directly to an existing offchain database.
As we continue to grow, we are looking to bring on a Frontend Engineer who will be pivotal in crafting intuitive, dynamic, and high-performance user interfaces. This role involves working closely with our product and design teams to deliver a seamless user experience, ensuring our platform is both powerful and user-friendly.
You’ll be working with a world-class data engineering team with experience in architecting (not just building or using) the production streaming systems at companies like Shopify, Activision, and more. We regularly present at data engineering conferences and merge changes back into upstream projects, so a love of open-source could be helpful.
Experience with Blockchain and Web3 is not required, but having proficiency in modern frontend frameworks and a keen eye for design will definitely make a candidate stand out.
Responsibilities:
We’re excited to talk with you if:
Bonus points for:
Benefits
Apply now
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Seedefy is hiring a CTO
About Seedefy
Seedefy Pte Ltd is a Singapore-registered company and the leading institutional investment platform dedicated to bridging the cross-border funding gap by connecting ecosystems worldwide. Our mission is to empower startups in accessing global venture capital opportunities. We have successfully onboarded over 100 global venture capital firms, managing a collective capital of $1.3B.
Role Overview
As CTO, you’ll spearhead our technological initiatives, focusing on token development and ICO processes. You’ll be instrumental in shaping our product roadmap and technical architecture, while also collaborating with our global team to align technology strategy with business goals.
What do we expect from a CTO?
Requirements
Preferred Qualifications
Work Environment
Compensation
Benefits
Apply with email
rick@seedefy.comPlease let Seedefy know you found this position on CryptoJobster.com as a way to support us so we can keep providing you with quality crypto jobs.
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