Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.
We are growing and looking for a new team member to join as a
Senior Rust Engineer Backend (80–100%)
The Role
We’re looking for a senior engineer to help design and build the core services behind our messaging backend. You will work on the systems that handle message delivery, real-time presence, and end-to-end encryption at scale. Most of our backend is written in Rust, and we’re expanding it further.
You will join a small team of engineers who care about correctness, performance, and keeping things simple. Expect to write production code, review other people’s code, and have a say in architecture decisions from day one.
What You Will Do
Design and build backend services in Rust that handle high-throughput, low-latency messaging traffic
Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
Debug and optimize systems under real production load, not just in benchmarks
Review code and mentor other engineers on Rust patterns and systems design
Take ownership of a service end to end, from design through deployment and maintenance
What We’re Looking For
More than ten years of professional software engineering experience, with at least two years writing Rust in production
Solid understanding of concurrency, memory management, and systems programming
Experience with distributed systems: what happens when a network partitions, a node dies, or a queue backs up
Comfort working close to the metal when needed, whether that’s networking, storage engines, or protocol design
Experience in working on scalable, low-latency, high-throughput systems
Good communication skills: you will need to explain trade-offs to people who don’t write Rust
A degree in computer science or equivalent experience; we care more about what you’ve shipped than where you studied
Nice to Have
Experience with async Rust (Tokio or similar)
Background in messaging protocols, telecom, or real-time systems
Contributions to open source Rust projects
Experience with encryption or security-critical systems
What We Offer
A young, motivated team with straightforward communication
Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.
We are growing and looking for a new team member to join as a
Senior Rust Engineer Backend (80–100%)
The Role
We’re looking for a senior engineer to help design and build the core services behind our messaging backend. You will work on the systems that handle message delivery, real-time presence, and end-to-end encryption at scale. Most of our backend is written in Rust, and we’re expanding it further.
You will join a small team of engineers who care about correctness, performance, and keeping things simple. Expect to write production code, review other people’s code, and have a say in architecture decisions from day one.
What You Will Do
Design and build backend services in Rust that handle high-throughput, low-latency messaging traffic
Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
Debug and optimize systems under real production load, not just in benchmarks
Review code and mentor other engineers on Rust patterns and systems design
Take ownership of a service end to end, from design through deployment and maintenance
What We’re Looking For
More than ten years of professional software engineering experience, with at least two years writing Rust in production
Solid understanding of concurrency, memory management, and systems programming
Experience with distributed systems: what happens when a network partitions, a node dies, or a queue backs up
Comfort working close to the metal when needed, whether that’s networking, storage engines, or protocol design
Experience in working on scalable, low-latency, high-throughput systems
Good communication skills: you will need to explain trade-offs to people who don’t write Rust
A degree in computer science or equivalent experience; we care more about what you’ve shipped than where you studied
Nice to Have
Experience with async Rust (Tokio or similar)
Background in messaging protocols, telecom, or real-time systems
Contributions to open source Rust projects
Experience with encryption or security-critical systems
What We Offer
A young, motivated team with straightforward communication
Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.
We are growing and looking for a new team member to join as a
Senior Rust Engineer Backend (80–100%)
The Role
We’re looking for a senior engineer to help design and build the core services behind our messaging backend. You will work on the systems that handle message delivery, real-time presence, and end-to-end encryption at scale. Most of our backend is written in Rust, and we’re expanding it further.
You will join a small team of engineers who care about correctness, performance, and keeping things simple. Expect to write production code, review other people’s code, and have a say in architecture decisions from day one.
What You Will Do
Design and build backend services in Rust that handle high-throughput, low-latency messaging traffic
Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
Debug and optimize systems under real production load, not just in benchmarks
Review code and mentor other engineers on Rust patterns and systems design
Take ownership of a service end to end, from design through deployment and maintenance
What We’re Looking For
More than ten years of professional software engineering experience, with at least two years writing Rust in production
Solid understanding of concurrency, memory management, and systems programming
Experience with distributed systems: what happens when a network partitions, a node dies, or a queue backs up
Comfort working close to the metal when needed, whether that’s networking, storage engines, or protocol design
Experience in working on scalable, low-latency, high-throughput systems
Good communication skills: you will need to explain trade-offs to people who don’t write Rust
A degree in computer science or equivalent experience; we care more about what you’ve shipped than where you studied
Nice to Have
Experience with async Rust (Tokio or similar)
Background in messaging protocols, telecom, or real-time systems
Contributions to open source Rust projects
Experience with encryption or security-critical systems
What We Offer
A young, motivated team with straightforward communication
Threema is the world’s best-selling secure messenger for both private users and businesses. Since 2012, we have been working tirelessly to ensure that our users can communicate freely without worrying about their privacy. Our growing user base includes millions of private customers and thousands of businesses and organizations from all over the world.
We are growing and looking for a new team member to join as a
Senior Rust Engineer Backend (80–100%)
The Role
We’re looking for a senior engineer to help design and build the core services behind our messaging backend. You will work on the systems that handle message delivery, real-time presence, and end-to-end encryption at scale. Most of our backend is written in Rust, and we’re expanding it further.
You will join a small team of engineers who care about correctness, performance, and keeping things simple. Expect to write production code, review other people’s code, and have a say in architecture decisions from day one.
What You Will Do
Design and build backend services in Rust that handle high-throughput, low-latency messaging traffic
Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
Debug and optimize systems under real production load, not just in benchmarks
Review code and mentor other engineers on Rust patterns and systems design
Take ownership of a service end to end, from design through deployment and maintenance
What We’re Looking For
More than ten years of professional software engineering experience, with at least two years writing Rust in production
Solid understanding of concurrency, memory management, and systems programming
Experience with distributed systems: what happens when a network partitions, a node dies, or a queue backs up
Comfort working close to the metal when needed, whether that’s networking, storage engines, or protocol design
Experience in working on scalable, low-latency, high-throughput systems
Good communication skills: you will need to explain trade-offs to people who don’t write Rust
A degree in computer science or equivalent experience; we care more about what you’ve shipped than where you studied
Nice to Have
Experience with async Rust (Tokio or similar)
Background in messaging protocols, telecom, or real-time systems
Contributions to open source Rust projects
Experience with encryption or security-critical systems
What We Offer
A young, motivated team with straightforward communication
