Senior Blockchain Engineer (Cosmos SDK & IBC)

I am Sadr, CEO of Oferli. We are building a high-performance, elite technical team, and I am looking for 5 to 10 dedicated founding technical partners to join me in this mission.
​The Vision:
Oferli is a 100% decentralized ecosystem. While we are rooted in Web3, our expertise spans across professional web and mobile application development. We are not just another agency; we are crafting the next generation of digital solutions. Our goal is to set a new standard for excellence, transparency, and decentralization.
​What I am looking for:
I am building a professional, senior-level "Elite Team." I am looking for partners who are truly passionate about the vision—not just short-term gains. By combining our individual expertise and portfolios, we will establish Oferli’s collective professional reputation.
​Requirements:
​Proven Expertise: You must be a senior-level professional. Please provide your portfolio showcasing your best work in web and mobile development.
​Commitment: This is a founding partnership. We are looking for those who believe in the mission and are ready to tackle complex challenges together.
​Professionalism: We operate with high standards. Communication and efficiency are key.
​How We Work:
​Collaboration: We use professional, secure channels for all communications. Qualified candidates will be contacted via email to be invited to our private workspace on Notion to align on our roadmap and launch our upcoming projects.
​Decentralized Operations: We leverage Web3 tools for collaboration and compensation, maintaining a fully decentralized environment.
​Growth: We are launching with a core team of at least 5 founding partners, scaling to 10, to deliver high-impact results for our clients.
​Application Process:
If you are a senior professional ready to build a world-class, decentralized ecosystem, apply here on LaborX. Qualified candidates will be contacted via email for further professional vetting and onboarding.
​Let’s build the future, together.
​Sadr B
CEO, Oferli

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

 
 
we’re looking for a senior blockchain engineer to build low-latency execution infrastructure around hyperevm and hyperliquid-related trading systems.
 
this is not a frontend or dapp role. the focus is on real-time execution systems, chain-native infrastructure, and market-aware backend engineering where latency, ordering, and state correctness directly impact execution outcomes.
 
you will work on systems that operate under noisy, adversarial, and highly dynamic conditions, including delayed or missing websocket events, rpc inconsistencies, transaction lifecycle complexity, state desynchronization, retries, and recovery logic.
 
core responsibilities include building and maintaining realtime blockchain data pipelines, websocket and rpc streaming systems, execution orchestration layers, liquidity-aware routing logic, transaction lifecycle management, and integration with orderbook and market data systems.
 
we are specifically looking for engineers who think in systems rather than features. meaning understanding how data flows through pipelines, how state evolves over time, how failures propagate, and how to design systems that recover automatically without manual intervention.
 
areas of work include:
 
- realtime blockchain data ingestion
- mempool-aware execution flows
- transaction lifecycle handling
- execution sequencing and routing
- websocket and rpc infrastructure
- state synchronization systems
- liquidity and orderbook integration
- performance and latency optimization
 
you should be comfortable working with distributed systems, asynchronous event processing, and latency-sensitive backend architectures.
 
strong experience in one or more of the following areas is highly relevant:
 
- exchange infrastructure
- trading systems
- execution engines
- blockchain indexers
- realtime event systems
- arbitrage systems
- rpc/node infrastructure
- defi backend systems
- low-latency backend engineering
 
preferred technical stack:
 
- typescript / node.js
- go
- rust
- python
- postgres
- clickhouse
- redis
- kafka or similar messaging systems
- docker
- linux environments
- evm rpc internals
- websocket infrastructure
 
ecosystem familiarity:
 
- ethereum, arbitrum, base, optimism, bsc
- hyperliquid / hyperevm
- foundry
- ethers.js / viem
- geth / erigon / nethermind
- dex and amm mechanics
- liquidity math, slippage, gas strategy, routing logic
 
this role is not suitable for:
 
- frontend-only developers
- nft or basic dapp experience only
- tutorial-level web3 developers
- candidates without production systems experience
 
we value engineers who have built real systems where correctness, latency, and reliability matter under load. we care less about buzzwords and more about concrete systems you have personally built and operated.
 
ideal candidates can clearly explain:
 
- system architecture decisions
- bottlenecks and tradeoffs
- failure modes and recovery strategies
- latency considerations in real systems
- production debugging experience
 
working style:
 
- remote
- async-first
- low bureaucracy
- high ownership
- engineering-driven team
- direct technical communication
 
we strongly prefer practical engineering depth over polished presentation. if you have built or worked on systems involving realtime data, trading infrastructure, blockchain execution, or latency-sensitive backend systems, please include details of those systems when applying.
 

We are currently seeking a skilled professional to join our team as a Full-time Hackintosh iOS Developer. In this role, you will be responsible for developing iOS applications for our Hackintosh platform. The ideal candidate will have a strong background in Web, Mobile, and Software Development, Engineering & Architecture, Customer Service, and Accounting and Consulting Specialist.
Responsibilities:
- Designing, developing, and implementing iOS applications for our Hackintosh platform
- Collaborating with cross-functional teams to define, design, and ship new features
- Troubleshooting application bugs and implementing solutions
- Ensuring the performance, quality, and responsiveness of applications
- Staying up-to-date with the latest industry trends and technologies
- Providing technical support and guidance to users as needed
Requirements:
- Proven work experience as an iOS Developer or similar role
- Proficient in Objective-C, Swift, and Xcode
- Strong understanding of iOS development best practices
- Excellent problem-solving skills
- Ability to work independently and as part of a team
- Strong communication and interpersonal skills
- Knowledge in web, mobile, and software development, engineering & architecture, customer service, and accounting and consulting specialist
If you are passionate about iOS development and eager to work on innovative projects in the Hackintosh space, we'd love to hear from you. Please apply with your resume and portfolio to be considered for this exciting opportunity.

Are you ready to advance your international career? If so, we are here to guide you!

Ubiminds is a forward-thinking company that prioritizes its people and collaborates with American software product enterprises to expand their global teams. We carefully select top talent from Latin America and match professionals with enduring, impactful opportunities while delivering full support as an employer-of-record.

We are currently seeking a skilled Senior Fullstack Developer who enjoys tackling complex technical hurdles, constructing robust backend systems, and developing responsive web applications. As a key contributor in this role, you will be instrumental in the design, expansion, and upkeep of essential platform features and web interfaces utilized by millions of learners and institutions worldwide.

Job Challenges:

In this position, you will embark on significant career-enhancing endeavors, refining your expertise and contributing to a team that values continuous improvement, technical ownership, and ongoing learning.

As a Senior Developer, your responsibilities will entail designing, constructing, and maintaining high-capacity backend services and user interfaces throughout the product ecosystem. Leading technical initiatives spanning across multiple sprints, producing precise technical specifications, coding in C# and JavaScript/TypeScript, and utilizing AWS infrastructure to ensure platform reliability will be part of your daily tasks.

Additionally, you will have the chance to mentor team members, collaborate with product and support teams, and actively engage in projects that embody our core values and raise engineering standards across all departments.

Responsibilities:

Software Engineering & Architecture: Produce top-tier code in C# for backend services and JavaScript/TypeScript for web applications, emphasizing scalable and fault-tolerant component architectures and APIs.

Technical Design & Planning: Craft detailed technical specs for multi-sprint projects, including cost estimations and architectural assessments, while actively seeking peer feedback during technical design evaluations.

Cloud Architecture & Integration: Develop and deploy services leveraging Amazon Web Services (AWS), working alongside DevOps and Cloud teams to ensure optimal performance and security.

Code Quality & Technical Standards: Participate in code reviews, enforce coding standards, and maintain robust test coverage across the codebase.

Mentorship & Collaboration: Guide mid-level and junior developers, promote a culture of technical rigor, and collaborate across departments to deliver customer-centric features.

Customer Empathy & Operational Support: Collaborate with support teams to address complex technical escalations, maintaining a deep understanding of customer needs and product usage.

Mandatory Skills:

Proficiency in Advanced English level

Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent industry experience

4+ years of professional software engineering experience in delivering complex customer-facing applications

Strong skill set in C# or Java, with a good transition capability to C#, and proficiency in object-oriented design principles

Proficiency in JavaScript and contemporary frameworks like TypeScript, Node.js, React

Strong knowledge of Amazon Web Services (AWS) core services and cloud infrastructure

Deep understanding of core CS fundamentals

Effective communication skills, both written and verbal

Nice to Have:

Experience with modern front-end frameworks like React and building single-page applications

Proven experience in developing and maintaining public or enterprise RESTful APIs and microservices

Background in high-scale SaaS or cloud platform environments

Familiarity with educational software ecosystems and enterprise integration standards like SAML, OAuth2, LTI

Team & Environment:

International, distributed engineering team

Ownership-driven culture, where engineers lead solutions from start to finish

Focus on modernization, automation, and enhancing developer experience

Ample autonomy to suggest and implement enhancements

Collaborative setting with significant impact on engineering efficiency.

About Ubiminds:

Our Culture:

People-First: Focus on people as the top priority

Challenge Yourself: Embrace continuous improvement and self-challenge

Make It Happen: Ready to tackle challenges with a dedicated attitude

We're in This Together: Teamwork, growth, and evolution as a collaborative entity

Averaging on Awesome: Commitment to exceeding expectations with high-quality service

Keep It Real: Guaranteeing honesty, transparency, and openness across all scenarios

Perks and Benefits:

Placed within a product-based company with equivalent employee treatment

Full back-office support, from career guidance to concierge services

Remote-first policy for a distributed team

MacBook provided, no need for a personal device

Access to growth opportunities through technology-focused events and interactions

English improvement programs for free

Candidate referral bonus opportunity

On-site headquarters available for use, equipped with amenities for a comfortable workspace.