Senior Go Developer

EMCD is a global crypto ecosystem building products across mining wallets payments custody and digital asset infrastructure.

We are looking for a Senior Go Developer to join the IAM team and take ownership of the services behind authentication registration MFA identity and user access across EMCD products.

The role combines hands-on backend development with technical ownership of the IAM domain including Keycloak-based infrastructure and legacy Go services.

• Own the architecture of the IAM domain including Keycloak-based infrastructure and legacy Go services
• Make architectural decisions and document them through ADRs
• Break down larger initiatives into repository-level tasks estimate delivery and take ownership of key milestones
• Review code and support the technical development of engineers within the team
• Own production reliability for authentication and registration flows: investigate incidents write postmortems and drive follow-up actions to completion
• Work closely with CISO Compliance Support and product teams including Coinhold Mining and Backoffice
• Improve existing IAM services while reducing technical debt and simplifying legacy components

• 4 years of production development experience with Go
• Strong understanding of OAuth 2.0 and OpenID Connect at protocol level: Authorization Code PKCE refresh token rotation token exchange Direct Grant and its risks JWT signing claims and resource-side validation
• Production experience with Keycloak: realms clients authentication flows required actions identity brokering with Google Apple or external OIDC providers and major-version upgrades
• Strong experience with MFA: TOTP SMS and email OTP push authentication passkeys and WebAuthn including origin / RP ID specifics for web and mobile
• Understanding of step-up authentication and trust levels using LOA / ACR
• Experience managing user sessions and devices session revocation session hijacking protection and secure cookie configuration
• Strong Go backend experience. Our stack includes echo pgx goose Redis Kafka (segmentio/kafka-go) gRPC protobuf and OpenTelemetry
• Strong PostgreSQL knowledge: schema design indexes JSONB query performance at scale and zero-downtime migrations
• Experience with event-driven systems and patterns such as transactional outbox idempotency retries and DLQ
• Experience with hexagonal architecture and integration testing using testcontainers

• Fully remote work from anywhere in the world
• Flexible working hours focused on results
• 20 paid vacation days 12 additional bonus days
• 100% paid sick leave
• Paid English lessons
• Support for courses certifications and professional training
• Technical ownership of a core IAM domain used across multiple EMCD products