Senior Software Engineer (371)
Are you seeking an opportunity to advance your international career with support every step of the way?
Ubiminds, a GPTW certified company, partners with American software product companies to expand their development capabilities by handpicking the top 5% of Brazilian talent for their regional strategies.
Currently, Ubiminds is collaborating with a company working on an innovative Public Safety product suite.
Responsibilities
Collaborate with Tech Lead and Engineering Manager to contribute to development projects primarily focused on Node.js, Express, React, and Next.js.
Contribute to backend development and integration to ensure delivery of reliable and scalable solutions.
Manage and optimize CI/CD pipelines to facilitate automated and efficient deployment processes.
Execute deployments and comprehensive testing procedures to ensure high-quality code and system stability.
Own projects entirely by actively participating in daily scrum meetings, liaising with cross-functional teams, and aligning project objectives and deadlines.
Required Qualifications
Over 5 years of experience in FullStack development, evidencing a track record of delivering top-notch solutions.
Proficiency in Node.js, Express, React, and Next.js, showcasing the ability to construct and maintain scalable applications.
Strong communication skills enabling effective collaboration across teams and clear presentation of ideas.
Preferred Qualifications
Background in software architecture with expertise in scalable system design and best practices.
Experience in the automotive industry or payments sector, providing domain-specific knowledge and insights.
Familiarity with Firebase and AWS, utilizing cloud services to enhance performance, reliability, and scalability.
About Ubiminds
Culture
Emphasis on prioritizing people within the organization.
Encouragement for self-improvement and continuous growth.
Directive to tackle challenges with a positive attitude.
Team-oriented work environment fostering collaboration and progress.
Dedication to delivering high-quality services and exceeding expectations.
Commitment to honesty, transparency, and openness in all situations.
Perks and Benefits
Opportunity to work for a product-focused company with equivalent benefits as full-time employees.
Full back-office support covering career guidance, HR, and concierge services.
Remote-friendly environment with company-wide remote-first policy.
Provision of company-issued MacBook for work.
Access to networking opportunities with tech professionals through tech talks and remote social events.
Free English lessons with a native speaker to enhance communication skills.
Candidate referral bonus program available.
Work-from-office option in Florianópolis headquarters with additional amenities like massages, snacks, soft drinks, and games.
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.