Senior Fulstack Software Developer (353)

Status
Florianópolis, Brazil
Full time
Remote
Compensation is not specified
Role
Full-Stack Engineer
Description

Senior Fullstack Software Developer Role Overview

Are you looking to advance your international career? Look no further, as Ubiminds is here to support you! We are proud to be a people-first company, certified as a Great Place to Work. Our focus is on partnering with American software product companies to expand their development capabilities. By handpicking the top 5% talent from Brazil, we offer a tailored approach to support the LATAM strategy, combining staff augmentation and employer-of-record services.

We are currently assisting a company in the development of an innovative product suite for home services. As a Senior Fullstack Software Developer, your main responsibilities will include collaborating with the design team, developing, and maintaining client software mainly in PHP (Laravel) and TypeScript (React/React Native). Your role will involve optimizing these applications for high speed and SEO performance to meet the client's business objectives.

Key Responsibilities

  • Passionately building high-quality software products as a Senior Fullstack Software Developer.
  • Developing reliable, observable, resilient, and scalable code for mobile and web applications supporting providers, customers, and internal stakeholders.
  • Hands-on involvement in building rich experiences and translating design systems into functional code. Bridging the gap between designers and engineers to ensure responsive scaling across various devices.
  • Collaborating with Product Management and Product Design teams to determine efficient feature implementation and drive product development.
  • Practicing continuous integration and continuous delivery by releasing new software regularly to enhance user experiences and productivity.
  • Mentoring junior developers to facilitate their growth and development.
  • Implementing SEO best practices to enhance site visibility and ranking by optimizing site structure, meta tags, and heading tags.

Required Skills

  • Advanced/fluent English skills for effective communication.
  • Proficiency in PHP (Laravel) and React/React Native with a solid understanding of web development principles.
  • Experience with SEO best practices and modern web development frameworks.
  • Strong background in client-side web software development with expertise in libraries and frameworks like React/React Native.
  • Familiarity with CSS architecture, responsive layout, accessibility, and animation principles.
  • Sound knowledge of computer science concepts and database operations.

Preferred Qualifications

  • Familiarity with SEO, Page Speed, Funnel Types, and User Generated Content.
  • Bachelor's degree in Computer Science, Engineering, or related field is a bonus.

About Ubiminds

Our Culture

  • Focus on people first.
  • Encourage continuous self-improvement.
  • Embrace challenges with a positive attitude and commitment.
  • Teamwork is our strength for success and evolution.
  • Commitment to delivering high-quality services that exceed expectations.
  • Maintain honesty, transparency, and openness in all situations.

Perks and Benefits

  • Enjoy being part of a product-based company with full support equivalent to full-time employees.
  • Access comprehensive back-office support including career guidance, HR, and concierge services.
  • Benefit from a remote-first policy in a distributed team setup.
  • Receive a MacBook as a work device.
  • Engage in growth opportunities and networking events with tech professionals.
  • Enhance English communication skills through free lessons.
  • Refer candidates through our referral bonus program.
  • Optional access to headquarters in Florianópolis for a change of work environment, including perks like weekly massages, snacks, drinks, and games.

Recruitment Process

  1. Initial interview with our Tech Recruiter to discuss the job opening and your experiences.
  2. Client-specific recruitment process.
  3. Job offer process.

Compensation

Monthly salary range: $4,000 - $5,000.

Skills Required
Avatar
Ubiminds
Website
Not specified
Company size
Not specified
Location
United States
Description
Not specified
Status

More Full-time Jobs

Show more

Backend Engineer with hands-on blockchain experience

Full time
Remote
We are building a modern hotel booking platform enhanced with Web3 capabilities, includingtoken-based payments, on-chain verification, and decentralized identity/ownership features.We’re looking for a Backend Engineer to design and build scalable backend systems andintegrate them with blockchain infrastructure. You’ll work closely with frontend and Web3engineers to deliver a seamless and reliable platform. 
Payment in Crypto
13,000-17,000
Monthly
See details

Senior Blockchain Engineer (Cosmos SDK & IBC)

Hong Kong
Hong Kong
Full time
Remote
Merklio is expanding its cross-chain orchestration layer. We are building a sovereign app-chain (Rollup-style) that aggregates liquidity from multiple L1s via IBC. We need a Blockchain Engineer to design, implement, and maintain our Cosmos-based chain.
Expectations:
Design custom modules (x/staking, x/rewards, x/merkl)
Implement IBC light clients and relayers
Optimize block time and state pruning
Write comprehensive unit & integration tests (Go test)
Build CLI tools for validators and delegators
Monitor node health and network upgrades
Collaborate with the research team on MEV-resistant ordering
Maintain chain upgrades (v1 → v2) with migration scripts
Write technical documentation for external validators
Nice to have:
Experience with Avalanche Subnets or Polkadot Substrate
Knowledge of HSM and key management
Open-source contributions to Cosmos SDK or related repos
Chinese+English language proficiency
Payment in Crypto
7,000-10,000
Monthly
See details

Full Stack Engineer focusing on Blockchain Technologies

Full time
Remote
Worklo is building the future of professional services automation by combining our core PSA platform with a blockchain-powered salary distribution system. The platform automates compensation based on project data, time entries, role assignments, milestones, and secure on-chain payroll execution.
We are looking for a highly capable Full Stack / Blockchain Engineer who can own both SaaS product development and blockchain infrastructure. This is a high-ownership role where you will help shape Worklo PSA and our blockchain payroll architecture from the ground up.
Key Responsibilities
* Build full-stack product features using Next.js, TypeScript, Node.js/Express, Supabase, PostgreSQL, React, shadcn/ui, and Tailwind CSS
* Design secure APIs, database schemas, authentication flows, and Supabase RLS policies
* Develop Solidity smart contracts for salary calculation and automated payroll distribution
* Build blockchain integrations for wallet registry, MetaMask/WalletConnect, payroll execution, and event syncing
* Deploy and manage smart contracts on Polygon or other EVM-compatible networks
* Implement dashboards for payroll visibility, wallet management, and transaction history
* Write tests for smart contracts using Hardhat, Foundry, or similar tools
* Improve performance, security, observability, and overall system architecture
Requirements
* 5+ years of full-stack software development experience
* 5+ years of blockchain development experience with deployed smart contracts
* Strong skills in TypeScript, Node.js, React, Next.js, PostgreSQL, and REST APIs
* Strong Solidity knowledge, including access control, reentrancy protection, gas optimization, and upgradeability
* Experience with ethers.js, viem, ERC-20 tokens, stablecoins, and EVM-compatible networks
* Ability to work independently in a remote-first, async startup environment
Nice to Have
* Experience with Supabase, Next.js App Router, React Server Components, Foundry, Hardhat, OpenZeppelin, The Graph, DeFi systems, multi-sig wallets, or multi-tenant SaaS platforms
Payment in Crypto
7,000
Monthly
See details

Senior Mobile application developer

Full time
Remote
I am looking for a developer who has much experience in Mobile application development.
But specially, candidate should be native in English.
Team communication is very important.
Please bid US only
Thank you
Payment in Crypto
300-1,000
Monthly
See details

Web Developer

New York City, USA
New York City, USA
Full time
Remote
Hi,
I need a custom ebay like site for bitcoins or using stock credit on it. I need it to let you pay the user verbally, like an agreement you agree on that's it. I need the site fixed so it can be upgraded in the future.
I need it to be fixed so you can upload something to the site and sell it.
All I ask is keep the buying and selling part verbal agreements only. Like sending the user stock credit virtually.
Bid on things on the website 
Sell things on the website
Buy things on the website
All I ask is keep the programming simple and the website in a simple form.
I need a website for the web browser and one for the phone web browsers.
If you can put in a custom user admin for it also, then that will be great.
Thank you,
Chris Clark (666 Encryption, CEO)
 
Payment in Crypto
10,000-100,000
Monthly
See details