The Vault

Staff Backend Engineer

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SeniorZdalnie·WarszawaFull-time

#475294·Dodano 15 dni temu·1

Źródło: The Vault

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Tech Stack / Keywords

Go Rust gRPC Kafka PostgresMPCHSMLedgerClaude CodeCursor

Podsumowanie oferty

Design and ship critical backend components for The Vault, an MPC-based crypto custody platform for institutional and retail clients. Drive technical initiatives through code, RFCs, design reviews, and mentorship, with a focus on either the security-critical core or platform integrations and APIs. The platform runs threshold signing across HSM and Ledger hardware.

Wymagania

Must-have experience:

Strong computer science fundamentals, including reasoning about concurrency, distributed systems, consistency models, networking, and operating system behaviour.
End-to-end ownership of non-trivial production systems, including design, shipping, measurement, improvement, and on-call.
10+ years of backend engineering experience, including 3+ years operating at Staff level or equivalent senior individual-contributor scope.
Strong production experience in a modern systems language such as Go, Rust, Java, or C++, or a comparable language; hands-on Go experience or readiness to ramp up on Go in the first month.
A track record of Staff-level technical leadership through code, RFCs, and influence without formal authority over teams.
A proven track record building high-load, multi-tenant SaaS in production, including HA, incident response, and SLOs.
Hands-on experience with modern backend stacks, including gRPC/HTTP, queues/streams, caching, relational databases, and Kafka/NATS or equivalent.
Strong testing discipline, including unit, integration, and contract tests, testability-first design, and deterministic CI.
Strong observability habits, including structured logging, metrics, tracing, and end-to-end production debugging.
Production-grade use of modern AI coding tools such as Claude Code, Cursor, and Codex or comparable tools; able to assess AI-generated code critically and identify what it gets wrong.

Nice to have:

Exposure to custody, wallets, or signing systems, including MPC, HSM, TEE, key management, or approvals.
Hardware wallet integration with Ledger.
Experience with multiple blockchain ecosystems, including EVM and Bitcoin; Cosmos or Solana experience is a plus.
Experience building custom agents, MCP integrations, or in-repo AI workflows.
Experience designing and running evaluations for AI-generated code, including correctness, security, and style.
Production experience with Kubernetes, service mesh, or SRE practices.
Regulated-environment experience in fintech, security audits, or compliance-driven engineering.
Threat modelling and security review participation.
Familiarity with SOC 2, ISO 27001, and DORA.

Obowiązki

Design, write, and ship critical platform components, including the policy engine, signing orchestration, key lifecycle workflows, recovery flows, approvals, audit trails, and multi-tenant wallet and account services.
Lead cross-cutting initiatives through written RFCs, design reviews, and code.
Build high-load, multi-tenant SaaS systems, including tenant isolation, quotas, rate limits, backpressure, concurrency control, and predictable latency under spikes.
Build distributed workflows using idempotency, retries, outbox/inbox, event-driven workflows, sagas and state machines, replay, and graceful degradation.
Design security-by-design systems using least privilege, secret handling, mTLS/JWT, tamper-evident logs, and audit-ready data models for SOC 2, ISO 27001, and DORA scope.
Profile and load-test systems; benchmark, analyze contention, tune GC, and work on relational modelling, migrations, indexing, and consistency boundaries using Postgres or an equivalent.
Use Claude Code, Cursor, and Codex to ship production code; build prompt and agent patterns, contribute to AI engineering practices, and determine where AI use is appropriate or unsafe.
Set patterns and shared libraries for services in the area of ownership; raise the bar through code review and example.
Own features end-to-end, from design notes and RFCs through code, tests, observability, rollout, and on-call.
Mentor senior engineers through reviews and written designs.

Benefity

Budget and autonomy for the tooling, models, and agents needed for the role.
Equity participation.

Udziały pracownicze

Inne informacje

Any time zone is possible, with reasonable overlap with EU/CIS hours.

The Vault

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