Senior Software Engineer - Engagement Product Line (339)
** Reinvented:**
Are you eager to advance in your international career journey?
Ubiminds, a GPTW-certified, people-centric organization, collaborates with American software product firms to expand their development reach. Leveraging the top 5% talent from Brazil for their LATAM strategy, Ubiminds provides a distinct blend of staff augmentation and employer-of-record services.
Currently, Ubiminds is supporting a company revolutionizing talent acquisition processes for organizations worldwide. Through an end-to-end hiring platform featuring video interviewing, assessments, and conversational AI, this company paves the way for seamless connections between businesses and candidates, anytime, anywhere. With a focus on using science-backed, modern hiring solutions driven by ethical AI, this company has conducted over 70 million video interviews and engaged in 200 million chat interactions with candidates for more than 1,200 pioneering clients globally.
Primary Responsibilities:
As a pivotal Senior Software Engineer, you will play a crucial role in the software development lifecycle, working from conceptual design to user implementation, where you can shape the real-world impact of our products significantly.
You will have a hands-on development role, working collaboratively with your team to enhance and extend our cutting-edge platform. Your responsibilities will include designing solutions, coding with a focus on quality and unit testing, mentoring fellow engineers, and tackling technical obstacles to enhance user experiences further.
Success in ensuring timely and quality software delivery to our customers will depend greatly on your ability to identify and tackle challenges faced by the initiatives you lead.
Key Duties:
- Drive the development of the client Interviewing Product Line, ensuring optimal utilization of development techniques and frameworks
- Analyze Product Requirements and draft Technical Designs
- Develop clear, secure, and resilient code
- Review peers' code and provide mentorship
- Participate in Research and Planning of new Initiatives
- Own resolution of complex system issues
- Expertise in outputting thorough automated testing
- Communicate concepts and solutions effectively through documentation and tech presentations
Preferred Experience:
- Full-stack software engineering background
- SaaS product design, deployment, and support experience within a cloud-based environment
- Proficiency in key tech areas such as Cloud Services, C#/.NET, Python, React, RESTful APIs, MVC Web Patterns, Docker, and more
- Strong understanding of Computer Science fundamentals
- Proficient in SQL and overall database management
- Ability to collaborate with Product and UX teams to drive customer-centric solutions
Necessary Requirements:
- Excellent English communication skills (written and verbal)
- Degree in Computer Science or equivalent field, or relevant professional experience
- Hands-on experience in software engineering
- Proficiency across various languages and technologies
- Skilled in working effectively in a global virtual setup
- Background in designing scalable and reliable cloud applications
- Familiarity with microservices architecture and containerization
- Knowledge of best security practices
Technologies Used:
A combination of HTML, CSS, Node.js, TypeScript, React, Git, Python, Django, AWS services, Postgres, SQL Server, RDS, Docker, Splunk, Jenkins, and more are common tools and technologies used by the organization.
Nice-to-have Qualifications:
- AWS or Software Development certifications
- Experience in mentoring others or building software on complex platforms
About Ubiminds:
Our culture is rooted in valuing people, seeking continuous improvement, embracing challenges, teamwork, striving for excellence, and maintaining transparency regardless of circumstances.
Perks and Benefits:
- Operating in a product-based company environment
- Access to comprehensive back-office support in career guidance, HR services, and concierge services
- Remote-friendly work policy
- Provided with your own MacBook
- Opportunities for personal and professional growth through engaging with tech professionals and activities like tech talks and remote social events
- English learning opportunities with native speakers
- Referral bonus for recommending qualified candidates
- Office facility available in Florianópolis, with added perks like weekly quick 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.