Sr. Software Engineer II, Backend (Rust)

4 days ago

Remote, United States or Chicago, IL, USASenior

Base Salary

$140k - $190k/yr

Responsibilities

Design, develop, and maintain Rust services and crates for account creation, identity verification, and KYC/CIP decisioning.
Build and test integrations with identity, fraud, and screening providers, including response modeling, deserialization, and fixture-based scenarios.
Implement pure, table-tested determination logic with authoritative definitions for business rules.
Design asynchronous task-based delivery with idempotency, retries, resumption semantics, and receipt-based completion gates.
Ensure correct and secure handling of PII and identity documents through redaction, minimal projections, encryption, secret management, and audit logging.
Represent market and product differences through policy and configuration to support new jurisdictions without refactoring.
Operate production services using instrumentation, structured logging, alerting, and incident response.
Design scalable and reliable service architecture using cloud infrastructure such as Google Cloud Platform and Kubernetes.
Lead Rust design reviews, broker technical contracts with external squads, and mentor engineers in Rust proficiency.

6+ years of professional software development experience, including substantial production Rust.
Strong production Rust skills, including ownership and lifetimes, error modeling, trait design, Tokio and the async ecosystem, Serde, and a SQL layer such as SQLx or Diesel.
Experience writing highly testable Rust with pure functions, table-driven tests, fixture-based integration tests, and strict contract tests.
Experience designing HTTP and event-driven service integrations with versioning and backward compatibility.
Experience handling sensitive data with encryption, secret management, least-privilege access, and audit requirements in containerized cloud environments such as Docker and Kubernetes.
Demonstrated use of AI coding agents such as Codex, Cursor, and Claude Code, with the ability to review and validate AI-assisted code.
Excellent communication and experience driving technical contracts across team boundaries with ownership of shipped systems.
Bachelor's or master's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
Experience with identity verification, KYC/AML, CIP, fraud, risk decisioning, fintech, trading, brokerage, crypto, or regulated financial services is a plus.
Experience with large Rust monorepos, shared crates, workspace tooling, policy-driven flow engines, YAML or JSON workflows, gRPC, protobuf, or feature-flagging platforms such as Statsig is a plus.

Salary range is $140,000.00-$190,000.00 USD with a 12% annual target bonus.
Chicago-based employees follow a hybrid schedule with in-office work Tuesday through Thursday and remote work Monday and Friday; exceptional candidates may have remote flexibility in listed states.
Employees receive 20 additional flex remote days annually and five company-wide office-optional weeks tied to major holidays.
Benefits include generous PTO, seven paid holidays plus five conditional holidays, one service day, a 401(k) with a 3.5% company match through ADP, paid parental bonding leave, health, vision, and dental coverage, and fully covered life and disability insurance.

501-1,000 employees