Senior Go Engineer - Cloud Trust Platform (Remote EU)

castaigroupinc; United States; Remote; USD 80,000 - 111,000; Full time

Benefits offered by this job

Remote-first (EU eligibility)

Equity options

Equipment budget

Learning budget

Team-building budget

Extra days off

Personal project time (10%)

Annual hackathon

Fast-paced project cycles

Travel covered onboarding

Job summary

castaigroupinc is seeking a remote-first senior engineer to own end-to-end back-end services in Go, focusing on trust, authentication, billing, and telemetry within a cloud-native platform. You will work across domains, drive design decisions, and participate in on-call rotations as needed.

The role emphasizes system correctness, scalability, and security, with a strong emphasis on collaboration and proactive problem-solving in a fast-paced startup environment.

Qualifications

• Strong fundamentals in software engineering with clean abstractions.
• Production Go experience or similar systems programming language.
• Background building trust-critical systems at scale (auth, billing, or data).
• Solid API design with versioning, auth, idempotency, and async patterns.
• Hands-on Kubernetes experience with deployment or debugging on a cluster.
• Debugging and performance tuning across large data stores.
• Experience with AI coding agents and agentic development workflows.
• Excellent written and spoken English; startup mindset and adaptability.
• Willingness to participate in on-call rotation.

Responsibilities

• Design, build, and operate backend services in Go used by customers.
• Own features end-to-end from design to production rollout.
• Debug complex production issues in security-, billing-, or trust-critical flows.
• Collaborate with product and other engineering teams to solve non-textbook problems.
• Contribute to product direction and backlog planning.

Skills

Go

Kubernetes

API design

Performance tuning

Distributed systems

On-call readiness

English communication

Tools

Prometheus

Grafana

OpenTelemetry

PostgreSQL

Job description

castaigroupinc is seeking a remote-first senior engineer to own end-to-end back-end services in Go, focusing on trust, authentication, billing, and telemetry within a cloud-native platform. You will work across domains, drive design decisions, and participate in on-call rotations as needed.

The role emphasizes system correctness, scalability, and security, with a strong emphasis on collaboration and proactive problem-solving in a fast-paced startup environment.