Senior Go Developer (IAM)

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.
Responsibilities
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
Requirements
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
What We Offer
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

Work arrangement
Yes