Staff Backend Engineer – Rust (533)
Ubiminds Staff Backend Engineer – Rust / Ruby
Remote · Full-time
About Ubiminds
Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development teams. They connect Brazil’s top 5% talent with innovative U.S. companies through a unique combination of staff augmentation and employer-of-record services.
They are supporting a U.S.-based healthcare technology company that is building and expanding a healthcare data platform and member management solution used by health insurance carriers and technology partners.
Challenge
Ubiminds is seeking a Staff Backend Engineer who brings together profound technical expertise with robust ownership and leadership skills.
This position is perfect for individuals who relish in deciphering complex and unstructured problems, architecting scalable backend systems, and influencing both technical direction and engineering culture. The successful candidate will play a key role in constructing the next generation of healthcare infrastructure, contributing to AI-powered initiatives, and offering mentorship to other engineers.
As a senior technical contributor, this role provides substantial autonomy and the chance to shape architecture, engineering standards, and product evolution.
Responsibilities
Enhance a large-scale healthcare data platform and member management solution.
Architect, develop, and sustain high-performance backend services and APIs.
Collaborate closely with Product and Engineering teams to deliver scalable solutions.
Manage projects from inception through deployment and continued operation.
Contribute to AI-powered endeavors and assist in designing and launching AI-driven products and features.
Scale infrastructure connecting healthcare insurance carriers and technology partners.
Elevate engineering standards, development practices, and technical processes.
Mentor junior and mid-level engineers through technical guidance and code reviews.
Engage in architecture discussions and long-term technical planning.
Write clean, maintainable, well-tested, and production-ready code.
Required Skills & Qualifications
Minimum of 8 years of professional software engineering experience.
Firm hands-on experience with Rust in production environments.
Competence in designing, building, and maintaining APIs.
Proven track record in building and launching AI-powered products or projects.
Strong grasp of software architecture and backend system design.
Dedication to software craftsmanship and high-quality engineering practices.
Capability to take charge of complex, unstructured problems independently.
Experience working in highly collaborative engineering teams.
Strong communication skills emphasizing transparency and positive collaboration.
Proficient in English, written and verbal, at C1 level.
Nice to Have
Familiarity with Ruby and Ruby-based applications.
Experience with Docker, Kubernetes, Helm, and Terraform.
Exposure to observability and monitoring platforms such as Datadog.
Experience in performance monitoring and optimization.
Competency in handling production incidents and enhancing operational excellence.
Knowledge of CI/CD optimization and deployment automation.
Background in large-scale distributed systems or infrastructure-intensive products.
Experience in healthcare, insurance, or highly regulated industries.
Team & Environment
Highly collaborative engineering culture with a focus on ownership and autonomy.
Opportunity to influence technical direction and engineering standards.
Focus on innovation, scalability, and AI-driven solutions.
Modern cloud-native environment supporting large-scale healthcare technology platforms.
Emphasis on mentorship, knowledge sharing, and continuous improvement.
Why Join
Contribute to impactful healthcare technology that affects millions of users.
Help steer the future of AI-powered healthcare solutions.
Influence architecture, engineering culture, and technical strategy.
Collaborate with highly skilled international engineering teams.
Full support from Ubiminds, including career guidance, HR, and administrative services.
Remote-first culture providing professional growth opportunities and global exposure.
Perks and Benefits
As a Staff Backend Engineer at Ubiminds, you offer:
- Placement in a product-based company, receiving the same treatment as their full-time employees.
- Back-office support from career guidance to HR and concierge services.
- Remote-first policy for a distributed team.
- Provided MacBook for work.
- Access to growth opportunities by connecting with other professionals in tech through tech talks and more.
- Improvement of English skills through free lessons with a native English speaker.
- Common amenities provided at headquarters for in-office work.
How the Process Works
- Interview with Tech Recruiter.
- Technical Assessment.
- Client Interview.
- Offer Decision.
Artificial intelligence (AI) tools may be utilized to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses, in order to assist recruitment teams. However, final recruitment decisions are made by humans.', ])
Chief Technology Officer (CTO) / Senior Full-Stack Developer (Web3)
We are building a next-generation Web3 social platform designed to redefine how digital communities connect, collaborate, and grow.
Backed by years of experience within the cryptocurrency, blockchain, and digital asset ecosystem, our team has developed deep insights into how founders, developers, investors, creators, and communities interact. This understanding inspired us to create a platform that goes beyond financial applications and focuses on empowering meaningful social engagement.
Our mission is to build a transparent, community-driven social network where users can share ideas, collaborate on projects, discover opportunities, and create lasting relationships. We believe the next evolution of social media will be powered by decentralized technologies while maintaining an exceptional user experience, simplicity, and long-term sustainability.
We are seeking an experienced Chief Technology Officer (CTO) or Senior Full-Stack Developer who is passionate about Web3 and capable of leading the technical vision, architecture, and execution of our platform from the ground up.
Responsibilities
Lead the technical strategy and product architecture.
Design and build scalable backend systems and modern frontend applications.
Develop high-performance APIs and real-time features.
Integrate blockchain technologies, wallets, and Web3 authentication where appropriate.
Build secure, reliable, and maintainable infrastructure.
Collaborate closely with product, design, and leadership teams.
Establish engineering best practices, code quality standards, and development workflows.
Mentor engineers and help grow the technical organization.
Evaluate emerging technologies and implement solutions that improve scalability, security, and user experience.
Requirements
5+ years of professional software development experience.
Strong experience with modern JavaScript/TypeScript ecosystems.
Experience with React, Next.js, Node.js, or similar technologies.
Solid understanding of system architecture, cloud infrastructure, databases, and API design.
Experience building scalable consumer-facing products.
Familiarity with blockchain technologies, Web3 infrastructure, wallets, smart contracts, or decentralized applications.
Strong knowledge of security best practices and application performance optimization.
Excellent problem-solving and communication skills.
Ability to work independently in a fast-paced startup environment.
Preferred Qualifications
Experience building Web3 or crypto products.
Understanding of decentralized identity, token ecosystems, or on-chain social applications.
Experience leading engineering teams or serving in a technical leadership role.
Background in DevOps, CI/CD, Docker, Kubernetes, or cloud platforms such as AWS or GCP.
Experience with real-time messaging, social platforms, or community products.
What We Offer
Competitive full-time compensation.
Opportunity to build a product from an early stage with significant technical ownership.
Flexible and remote-friendly work environment.
Collaborative team focused on innovation and long-term impact.
Work on cutting-edge Web3 technologies and help shape the future of digital communities.
Opportunity for career growth and leadership as the platform scales.
If you are excited about building the next generation of Web3 social experiences and want to make a meaningful impact from the earliest stages, we'd love to hear from you.
Senior Blockchain Engineer (Cosmos SDK & IBC)
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
Smart Contract Engineer (Solidity / Rust)
Expectations:
Design and deploy upgradeable proxy contracts (UUPS)
Write high-assurance tests with invariant testing (Foundry)
Implement access control (Ownable2Step, roles)
Integrate with Chainlink Automation and CCIP
Write Natspec docs and deployment scripts
Participate in internal security reviews and bug bounties
Optimize storage layouts to reduce gas costs by >15%
Collaborate with the research team on novel staking mechanisms
Nice to have:
Experience with LayerZero or Hyperlane
Published audit reports or contest wins (Code4rena / Sherlock)
Knowledge of ZK-proofs (basic)
Chinese language proficiency
Senior Blockchain Engineer - Low-Latency Execution Infrastructure (HyperEVM / Hyperliquid)
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.
Senior Rust Developer
We're looking for a Senior Rust Developer to join our core engineering team and own the systems that sit closest to the market. This means low-latency order execution engines, high-throughput market data pipelines, real-time streaming infrastructure, and integrations with both centralized and decentralized exchanges. Every millisecond and every line of code matters here, and you'll be the person making sure it all holds up under pressure. This is not a role for someone who wants to write Rust adjacent to trading. You'll be building the backbone of live production systems where correctness, safety, and raw performance have direct P&L consequences. You'll work alongside quantitative researchers and other engineers to implement and deploy strategies, and you'll have meaningful input into the infrastructure decisions that shape how we build and scale. If you've spent years pushing Rust to its limits in high-performance environments and you want that work to matter in real markets in real time, this is the role.
Responsibilities
Design, build, and maintain high-throughput, low-latency trading systems in Rust
Develop and optimize order execution engines, market data feeds, and real-time processing pipelines
Build reliable integrations with centralized and decentralized exchanges across CEX and DEX environments
Architect systems for real-time streaming data and WebSocket communication at scale
Write safe, well-tested concurrent code leveraging async runtimes including Tokio and async-std
Collaborate with quantitative researchers to implement and deploy trading strategies into production
Profile, benchmark, and eliminate performance bottlenecks across critical system paths
Contribute to infrastructure decisions around deployment, observability, and fault tolerance
Requirements
5+ years of professional software engineering experience
2+ years building and maintaining production systems in Rust, and you will be tested on it
Deep command of Rust's ownership model, lifetimes, traits, and async patterns
Experience with high-performance networking including TCP/UDP, WebSockets, and gRPC
Strong understanding of concurrency primitives and lock-free data structures
Familiarity with financial systems, trading platforms, or real-time data pipelines
Linux systems programming and performance tuning experience
Comfortable working independently in a fast-paced, remote-first environment
Nice to Have
Experience with cryptocurrency exchanges, DeFi protocols, or blockchain RPC nodes
Knowledge of FIX protocol or other financial messaging standards
Open-source Rust contributions
Experience with FPGA or kernel-bypass networking such as DPDK or io_uring
Familiarity with quantitative trading concepts including order books and market microstructure
Infrastructure experience with Docker, Kubernetes, Terraform, or Prometheus/Grafana