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Kast
$98k - $105k estimated
Brazil
We're looking for a hands-on Senior Backend Engineer to help build and scale KAST's LATAM domestic payment rails.

You'll be a core contributor on the effort to onboard additional fiat payment providers as redundant, hot-swappable rails. You'll work closely with Product, Compliance/Risk, L3 production support, and provider partners to ship reliable, auditable payment systems that meet the LATAM Central Banksโ€™ requirements.

Location: remote from Brazil.
Department
Engineering
Employment Type
Full Time
Location
Brazil
Workplace type
Fully remote

What Youโ€™ll Be Doing

  • Design and build production-grade backend microservices and APIs in Go
  • Implement resilient fallback and routing logic across providers (limits, uptime, KYC eligibility) with feature-flagged rollout and safe rollback paths
  • Partner with the fraud detection flow and onboarding/KYC integration to keep transaction and onboarding flows compliant and observable
  • Contribute to FSDs, technical design docs, and delivery estimates; break down work into forward-compatible increments and track open dependencies/pendencies
  • Design reliable, auditable, and secure systems with strong observability and operational workflows
  • Help raise the bar on backend engineering standards through code review, technical guidance, and mentorship of squad members

What You'll Bring

  • 5+ years of software engineering experience
  • Strong backend engineering expertise, particularly with Go
  • Experience building production-grade APIs and distributed systems, including event-driven / webhook-based integrations with third-party providers
  • Solid understanding of system reliability, security, and auditability, especially for money-movement or transactional systems
  • Ability to work through ambiguity: reverse-engineer existing flows, freeze interfaces early, and design for parallel delivery when dependencies aren't fully built yet
  • Comfortable working cross-functionally with product, compliance, operations, and external provider/partner teams
  • Startup mindset with strong ownership and execution ability
  • Experience with cloud infrastructure and modern engineering workflows (AWS, containers, relational databases, streaming/messaging)

Nice to have

  • Experience integrating payment providers / payment rails and reasoning about redundancy, provider failover, and reconciliation
  • Familiarity with PIX and the Brazilian payments landscape, including Central Bank regulatory requirements and named virtual accounts
  • Experience with KYC/KYB, AML, transaction monitoring, sanctions screening, or fraud/risk tooling
  • Experience in crypto, stablecoins, or Web3 infrastructure (e.g. BRL โ†” USDC / stablecoin conversion flows)
  • Experience decoupling tightly-coupled systems into provider-agnostic, adapter-based architectures
  • Spanish language skills to coordinate with local providers
  • Experience with AWS (ECS Fargate, Aurora/PostgreSQL), Kafka, Redis, Kubernetes, or Terraform

About KAST

KAST is redefining stablecoin banking for global citizens, crypto professionals, Web3-native businesses, and high-inflation markets hungry for USD-backed banking. Backed by top-tier global investors and led by the ex-APAC CEO of Circle, our leadership team spans Circle, Airwallex, Revolut, Wise, Grab, Zoom, AWS, and leading OTC desks. Weโ€™ve scaled from zero to nearly a million users at ridiculous speed.
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Is Kubernetes high demand?

Yes, Kubernetes is currently in high demand in the technology industry

Kubernetes is an open-source container orchestration platform that is widely used for deploying, scaling, and managing containerized applications

It provides a standardized way to manage and automate the deployment of containerized applications across multiple hosts and provides benefits such as reliability, scalability, and flexibility

As more and more organizations move towards containerized architectures, Kubernetes has become a critical component of their infrastructure

Kubernetes is used by companies of all sizes, from startups to large enterprises, and across various industries, including finance, healthcare, and e-commerce

According to various job market and salary surveys, Kubernetes-related skills are in high demand, and job positions related to Kubernetes are growing at a rapid pace

In fact, Kubernetes is often listed as one of the top skills that are in high demand by technology companies

Overall, Kubernetes is a highly sought-after skill in the technology industry, and it's likely to remain in high demand in the foreseeable future as more and more organizations adopt containerization and cloud-native architectures.