OPSWAT

Protects critical infrastructure from malware

Rust Engineer

Backend EngineeringConfirmed live in the last 24 hours

Full-timeBudapest, HungaryNo salary listedIn-person

About the Job

Requirements

A good foundation in software engineering principles is required.
Knowledge of Rust ownership, borrowing, lifetimes, traits, generics, and idiomatic error handling with Result is required.
Familiarity with Cargo and the Rust toolchain, including rustup, clippy, and rustfmt, is required.
Understanding of Rust concurrency, including threads, Send/Sync, atomics, and synchronization primitives such as Mutex, RwLock, and channels, is required.
Understanding of thread pools and producer-consumer patterns is required.
Understanding of common approaches to avoiding lock contention and race conditions is required.
Experience with Docker or containerization is required.
Knowledge of Semantic Versioning and dependency management with Cargo, including workspaces, crates, and feature flags, is required.
Experience or familiarity with CI/CD pipelines is required.
A solid grasp of design patterns, trait-based composition, and writing clean, readable code is required.
Proficiency in English is required.

Responsibilities

Work with the Engineering Manager and Hungary-based team to plan, design, implement, and maintain Rust components and applications.
Work with the Hungarian Data Science team to build a unified SDK that wraps AI-based models so the features can be integrated into Aether.
Review requirements, contribute to feature design, and implement clean, idiomatic, maintainable Rust code.
Write and maintain unit and integration tests and participate in code reviews to ensure quality and best practices.
Create and update technical documentation, including rustdoc for public APIs.
Identify opportunities for code improvements and participate in discussions on enhancements.
Collaborate with global engineers to deliver secure, reliable, and performant software.
Support junior engineers through code reviews and pair programming, and continue developing expertise in advanced systems topics.

Desired Qualifications

Experience with TeamCity is preferred.
Understanding of operating-system-level file and process behavior on Windows and/or Linux.
Experience designing SDKs or library APIs, or packaging machine-learning models for inference, such as with ONNX Runtime.
Experience with asynchronous Rust, such as Tokio, or unsafe Rust and foreign-function interface boundaries.
Hands-on performance experience, such as profiling with flamegraph, benchmarking with criterion, or awareness of memory allocation.
Familiarity with AWS basics, including S3, API Gateway, and DocumentDB, or similar cloud services.
Background in cybersecurity, including antivirus, endpoint detection and response, or sandboxing; compression; parsers; SIMD; or machine-learning concepts.

OPSWAT, a global leader in IT, OT, and ICS critical infrastructure cybersecurity, delivers an end-to-end platform that gives public and private sector organizations and enterprises the critical advantage needed to protect their complex networks, secure their devices, and ensure compliance. Over the last 20 years our commitment to innovative technology has earned the trust of more than 1,700 organizations, governments, and institutions globally, solidifying our role in protecting the world’s critical infrastructure and securing our way of life.

The Position

We are excited to welcome an experienced Software Engineer (Rust) to our expanding Technology Office team in Budapest.

In this mid-level position, you will contribute to the development and enhancement of high-performance Rust software that supports our products across on-premise, cloud, and hybrid deployments. You'll work with the modern Rust ecosystem and supporting tools to build reliable, safe, and efficient code as part of impactful projects. A key focus of the role is helping the Data Science team build a unified SDK that makes their AI-based features easy to integrate into Aether.

Joining a collaborative global team (with members in Vietnam, Spain, Romania, UK, US, Georgia, and Hungary), you'll work closely with senior engineers — both locally and remotely — in a supportive, international environment that values growth and innovation.

What You Will be Doing

Work with the Engineering Manager and Hungary-based team to plan, design, implement, and maintain Rust components and applications

Work closely with the Hungarian Data Science team, helping them build a unified SDK that wraps their AI-based models so these features can be integrated easily into Aether

Review requirements, contribute to feature design, and implement clean, idiomatic, maintainable Rust code

Write and maintain unit and integration tests; participate in code reviews to ensure quality and best practices

Create and update technical documentation for your work, including rustdoc for public APIs

Help identify opportunities for code improvements and participate in team discussions on enhancements

Collaborate with global engineers to deliver secure, reliable, and performant software

Support junior engineers through code reviews and pair programming, and keep growing into advanced systems topics

What We Need from You

Good foundation in Software Engineering principles

Good knowledge of Rust: ownership, borrowing and lifetimes, traits and generics, and idiomatic error handling with Result

Familiarity with Cargo and the Rust toolchain (rustup, clippy, rustfmt)

Good understanding of:

Concurrency in Rust: threads, Send/Sync, atomics, and synchronization primitives (Mutex, RwLock, channels)

Thread pools and producer-consumer patterns

Common approaches to avoiding lock contention and race conditions

Has experience with Docker/containerization

Good knowledge of Semantic Versioning (SemVer) and dependency management with Cargo (workspaces, crates, feature flags)

Experience or familiarity with CI/CD pipelines (TeamCity preferred)

Solid grasp of design patterns, trait-based composition, and writing clean, readable code

Proficiency in English

It Would be Nice if You Had

Understanding of OS-level file and process behavior on Windows and/or Linux

Experience designing SDKs or library APIs, or packaging ML models for inference (e.g., ONNX Runtime)

Experience with async Rust (e.g., Tokio) or with unsafe Rust and FFI boundaries

Hands-on experience with performance work (e.g., profiling with tools like flamegraph, benchmarking with criterion, memory allocation awareness)

Familiarity with AWS basics (S3, API Gateway, DocumentDB) or similar cloud services

Any background in cybersecurity (AV, EDR, sandboxing), compression, parsers, SIMD, or ML concepts

Why You’ll Love Working Here

Stable, growing international company with a strong global customer base

Supportive, professional, and diverse team spanning multiple continents

Real challenges and meaningful ownership on cutting-edge projects

Modern Rust technology stack with opportunities to learn advanced systems programming

Mentorship, career growth, and exposure to international collaboration

OPSWAT is an equal opportunity employer. We celebrate diversity and are committed to providing an environment where equal employment opportunities are extended to all employees and applicants, free of discrimination and harassment of any type. All employment decisions are based on individual qualifications, job requirements, and business needs without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other category protected by federal, state, or local laws.

Recruiting Agencies: we do not accept unsolicited resumes from third party agencies for any of our open positions. To submit resumes for our jobs, there must be a recruiting contract approved by our legal team and endorsed by both parties. We are currently not accepting additional 3rd party agencies at this time.

About the Company

OPSWAT

Protects critical infrastructure from malware

OPSWAT provides cybersecurity solutions that protect critical infrastructure from malware and zero-day attacks by focusing on threat prevention and secure data transfer. Its products secure files and devices at all stages—entry, exit, and rest—ensuring secure access and safe data exchange. The company differentiates itself through deep specialization in high-risk sectors like energy, finance, and government, and by achieving widespread trust (notably 98% of U.S. nuclear power facilities) for its compliance-driven approach. Its goal is to help organizations maintain secure, compliant operations and minimize the risk of cyber compromise while keeping systems productive.

Company size: 1,001-5,000
Company stage: Growth Equity (Venture Capital)
Total funding: $125M
Headquarters: Tampa, FL
Founded: 2002

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