Senior Software Engineer
About Immunefi
At Immunefi, we are dedicated to safeguarding the future of digital currency by serving as Web3's primary defense against catastrophic hacks. We are a leading bug bounty platform that identifies and prevents security vulnerabilities before user funds are compromised. Our team consists of highly skilled professionals focused on protecting Web3, and we are seeking individuals who are eager to utilize their expertise to contribute to our mission. If you are drawn to a fast-paced, problem-solving environment at the core of decentralized finance (DeFi), please read on.
Summary
As Immunefi continues to expand, we are seeking to grow our software engineering and development teams. These teams work diligently to ensure the functionality, security, and usability of the Immunefi platform for our Project Clients and our Whitehat Hacker Community. The successful candidates will be experienced JavaScript Developers responsible for designing, developing, and maintaining the intricate web applications that form the Immunefi platform.
This position entails a comprehensive involvement in the software development lifecycle, from gathering requirements from the Product Department to conducting feasibility studies, creating engineering reviews, refining with Product, devising engineering plans, and collaborating in building, delivering, and deploying code in sprints.
If you are a proficient JavaScript developer adept in NextJS, React, Remix, and related frameworks, and eagerly seeking a new challenge, this role might be the perfect fit for you.
Please be sure to include your Github profile link on your CV.
Note: While our organization operates globally and is fully remote, applicants are expected to be within 4 hours on either side of GMT-6 (preference for GMT-6 to GMT-2) to align effectively with the engineering and development team.
Role Responsibilities
- Develop and implement high-performance, scalable web applications using JavaScript and related technologies
- Collaborate with Engineering, Development, and Product teams to fulfill platform functionality requirements
- Write clean, efficient, and maintainable code
- Explore and adopt new technologies to enhance development efficiency
- Contribute to technology development, suggest improvements, and iterate on ideas
- Troubleshoot and resolve issues throughout the full stack
- Implement automated tests to ensure code quality and sustainability
- Participate in code reviews and provide constructive feedback
- Stay updated on the latest web development trends and technologies
- Contribute to technical documentation development
Applicant Requirements
- Extensive software development experience, especially as a Full Stack JavaScript developer
- Proficiency in JavaScript, Next.js, React, and related technologies (extensive experience required)
- Background in transforming product design requirements into user interfaces
- Proficiency in TypeScript and PostgreSQL
- Solid understanding of web application architecture and design patterns
- Familiarity with unit testing and integration testing frameworks like Playwright, Cypress, or Jest
- Experience with Git and version control best practices
- Strong debugging and troubleshooting skills
- Prior experience in a fully remote company (preferred)
- Knowledge of Google Cloud, Docker, shell scripting, and Agile methodologies (preferred)
- Bachelor's degree in computer science or a related field (preferred but not mandatory)
Working at Immunefi
Immunefi acts as the premier Bug Bounty Marketplace in the crypto/Web3 realm, offering a platform that safeguards billions of user funds. We continuously aspire for excellence while building a team of adept professionals to drive our company's growth and scale. Successful candidates will work in a collaborative, cross-functional environment valuing ideas, feedback, and effective communication. Given our fully remote and globally dispersed team, individuals must excel in autonomous, self-driven work and adept at managing communication across various time zones.
Our Core Values
- Customer-centric approach laying the foundation for the best customer outcomes
- Constant vigilance ensuring high security standards for customer safety and success
- Bias for action to drive impactful decisions proactively
- Commitment to excellence, building a culture of discipline and accountability
- Think ambitiously and innovatively by setting audacious goals
- Act as an owner, driving outcomes till completion in service of the company's mission
- Build trust and maintain integrity in dealings with team members, customers, and community
What We Offer
- Remote-first work environment with flexible schedules
- Autonomous setting with trustworthy, smart team members
- Opportunity to contribute to an early-stage company in a dynamic industry
- Path to build your career within the evolving company
- Exposure to a global market and diverse individuals
- Chance to impact and secure the ecosystem for smart contracts and the future of finance, protecting over $100B in user funds
Senior web3 engineer
We’re building a SocialFi platform combining real estate and DeFi. After launching our MVP, we’re now progressing to version 2.
Role:
Join our remote team to develop website, smart contracts, integrate blockchain features, and ensure platform security.
Responsibilities:
- Develop and deploy smart contracts on Ethereum or Layer 2.
- Integrate wallet connect and decentralized features.
- Collaborate and direct contribute with frontend/backend teams.
- Conduct security audits.
Requirements:
- Experience with React, Ethers.js, Web3.js.
- Familiarity with wallet extensions and DeFi protocols.
- Ability to fix errors within 1 hour during tests.
- Comfortable working independently in a remote setup.
Nice to Have:
- Knowledge of cross-chain protocols or cryptography.
- Experience in social finance or real estate blockchain projects.
Application:
Send your resume and Linkedin profile. Selected candidates will do a quick coding test.
Contact: contact@hubsai.net
Join us to help shape the future of SocialFi!
Junior / Middle Metaverse Developer (Unity / Web3 / VR)
You will work with Unity, WebGL, and blockchain technologies to create engaging metaverse features and optimize them for performance across different devices. The developer will collaborate with designers and backend engineers to deliver scalable and stable products.
Requirements include experience with Unity and C#, understanding of 3D development, Web3 or blockchain basics, and familiarity with Git and API integration. Experience with VR/AR, NFTs, or multiplayer systems is a plus.
We offer remote work, flexible hours, crypto payments, and the opportunity to build innovative metaverse products.
Junior/Mid Decentralized Infrastructure Engineer
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements:
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects)
Solid Python / Rust / Go skills
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Web3 Fullstack Developer
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.
Junior AI Engineer
Join one of our fast-growing portfolio startups and help build simple AI features. You’ll work with large language models, create basic automations and chat tools, test ideas, fix small bugs, and integrate AI into everyday products.
Skills & Requirements:
0–2 years of experience (fresh graduates or self-taught welcome)
Basic Python knowledge
Interest in AI, LLMs or chatbots (personal projects are a big plus)
Quick learner who enjoys trying new things
Good English for team communication
Salary: $95,000 – $135,000 USD base + equity in the startup + full benefits
Description:
Sirex.vc not only invests — we actively help our portfolio companies hire great people. This Junior AI Engineer role is inside one of our AI-native startups. You’ll get real hands-on experience, learn from the best, and build things users actually use — all with full support from the Sirex team.
High risk. Zero apologies.