Senior Backend Engineer

1 semana atrás

Rio de Janeiro, Brasil Spheric Tempo inteiro

3thixRemote-First (Global) | Full-TimeAbout 3thix3thix is a next-generation fintech platform bridging traditional payments with blockchain rails. We power seamless, low-cost, and compliant transfers using stable tokens, smart contracts, and hybrid on/off-ramp infrastructure. Backed by top-tier VCs, we process millions in daily volume and are expanding into new corridors and asset classes.The RoleWe're hiring a Senior Backend Engineer with deep expertise in fintech payment systems, blockchain protocols, and stable token ecosystems (USDC, USDT, EURC, etc.). You'll design, build, and scale the core transaction engine that routes fiat crypto, settles on-chain, and ensures regulatory compliance at every step.What You'll DoArchitect and maintain high-throughput payment orchestration services handling fiat deposits, crypto swaps, stable token mint/burn, and instant settlements.Build reconciliation systems that sync on-chain events (EVM, Solana, Stellar) with off-chain ledgers and banking rails (ACH, SEPA, SWIFT, SPEI).Implement risk, fraud, and AML controls in real-time transaction pipelines.Design idempotent, event-driven microservices using Kafka / Pulsar and domain-driven patterns.Own blockchain node infrastructure (Geth, Solana RPC, custom indexers) and write secure smart-contract interaction layers.Scale systems to 10k+ TPS with sub-100ms latency for cross-border flows.Collaborate with compliance and product teams to embed KYC/KYT, travel-rule data, and sanction screening.Lead incident response for payment disputes, rollbacks, and chain re-orgs.Must-Have Skills5+ years backend engineering in high-scale environments.Production experience in fintech / payments (acquiring, issuing, remittance, or payout systems).Deep blockchain knowledge:EVM-compatible chains (Ethereum, Polygon, Arbitrum)Stable token standards (ERC-20, SPL, CCTP)MEV, gas optimization, and on-chain data indexing (The Graph, Dune, custom subsql)Mastery of Go, Rust, or TypeScript/Node.js (we primarily use Go).Event sourcing, CQRS, and distributed transaction patterns.Secure handling of HSMs, key management (KMS, MPC), and cryptographic signing.Observability stack: Prometheus, Grafana, OpenTelemetry, ELK.Experience with regulated environments (PCI-DSS, SOC2, PSD2, FinCEN travel rule).Nice-to-HaveBuilt or audited stablecoin issuance/redemption systems.Contributed to open-source blockchain tooling or payment protocols.Worked with layer-2 networks (Optimism, Base, zkSync) or cross-chain bridges.Familiarity with ISO 20022, FedNow, or RTP rails.Tech StackCore: Go, Rust, PostgreSQL, Redis, KafkaBlockchain: Solidity, Hardhat, Foundry, ethers.js, viem, Solana SDKInfra: Kubernetes, Terraform, GCP/AWS, Grafana TempoSecurity: HashiCorp Vault, AWS KMS, Fireblocks MPCWhy Join 3thixEquity in a rocket-ship startup.Unlimited PTO + global off-sites.Top-tier health, dental, and remote workspace stipend.Work directly with ex-Stripe, Circle, and Coinbase engineers.Shape the future of programmable money.

  • Senior Backend Engineer

    3 semanas atrás

    Rio de Janeiro, Brasil GigEasy AI Tempo inteiro

    Senior Backend Engineer at GigEasy AI This role will earn you a competitive salary range of $36,000 – $42,000 per year, with pay based on skills and experience. Base pay range $36,000.00/yr - $42,000.00/yr About GigEasy GigEasy is revolutionizing insurance for the gig economy. We’re building an AI‑powered insurance marketplace platform that connects...

  • Senior Backend Engineer

    4 semanas atrás

    Rio de Janeiro, Brasil Valor Software Tempo inteiro

    About Valor Valor is an international IT company specializing in software development, consulting, and modern technology solutions. We build scalable applications and platforms using Node.js , cloud-native architectures, and DevOps practices . Senior Backend Engineer We are looking for a Senior Backend Engineer to join our global team and take ownership of...

  • Senior Backend Engineer

    Há 7 dias

    Rio De Janeiro, Brasil Spheric Tempo inteiro

    3thixRemote-First (Global) | Full-TimeAbout 3thix3thix is a next-generation fintech platform bridging traditional payments with blockchain rails. We power seamless, low-cost, and compliant transfers using stable tokens, smart contracts, and hybrid on/off-ramp infrastructure. Backed by top-tier VCs, we process millions in daily volume and are expanding into...

  • Senior Full Stack Engineer

    Há 3 dias

    Rio De Janeiro, Brasil Sky Systems, Inc. (SkySys) Tempo inteiro

    Role: Senior Full Stack EngineerPosition Type: Full-Time Contract (40hrs/week)Contract Duration: Long TermWork Hours: US TimeWork Schedule: 8 hours/day (Mon-Fri)Location: 100% RemoteWe’re looking for a Senior Full Stack Engineer (Backend Focused) to design, develop, and scale backend systems and APIs using Node.Js,

  • Backend Engineer

    Há 2 dias

    Rio de Janeiro, Brasil AgileEngine Tempo inteiro

    AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. WHY JOIN US  If you're looking for a place to grow, make an...

  • Senior Backend

    Há 8 horas

    Rio de Janeiro, Brasil Kake Tempo inteiro

    Senior Backend (Node+Python) EngineerSummary We're looking for a Senior Backend Engineer to join one of our key partners in building the next generation of digital commerce infrastructure. This role is focused on creating high-performance, scalable backend services that power mission-critical features for large-scale retailers and digital platforms. You will...

  • Senior Backend

    3 semanas atrás

    Cabo De Santo Agostinho, Brasil Kake Tempo inteiro

    Senior Backend (Node+Python) EngineerSummaryWe’re looking for a Senior Backend Engineer to join one of our key partners in building the next generation of digital commerce infrastructure. This role is focused on creating high-performance, scalable backend services that power mission-critical features for large-scale retailers and digital platforms. You...

  • Senior Backend Engineer

    Há 4 dias

    Patos de Minas, Brasil Foldspace Ai Tempo inteiro

    Job Title: Senior Backend Engineer Location: Remote (LATAM) Type: Full-timeReports to: CTOAbout Foldspace AIFoldspace AI is reimagining how users interact with software.We embed a real-time AI agent directly into SaaS applications—not just to chat, but to act.Our agent understands user behavior, triggers features, and renders UI components...

  • Senior Backend Engineer

    2 semanas atrás

    Fazenda Rio Grande, Brasil Sphise Tempo inteiro

    Senior Backend Engineer (PHP/Laravel)Location: Brazil (Remote)Our trusted high-growth healthcare technology partner is seeking a talented Senior Backend Engineer (PHP/Laravel) to join their dynamic team.This innovative company is dedicated to revolutionizing the healthcare industry through cutting-edge technology solutions.Position Overview:As a Senior...

  • Senior Integrations Engineer

    4 semanas atrás

    Rio de Janeiro, Brasil Kake Tempo inteiro

    Senior Integrations EngineerSummary We’re looking for a Senior Integrations Engineer to join one of our partners focused on delivering intelligent, data-driven e-commerce solutions. You’ll be responsible for building and maintaining backend services and data integrations using NestJS and Python, ensuring smooth data flows between systems and scalability...