Network- & Security Engineer 80-100%

PrivaSphere
is a Swiss technology company building a secure, scalable platform for encrypted email and online applications. To support our international growth, we are looking for a technically ambitious
Full-Stack Software Engineer
who enjoys building reliable, secure, user-focused systems end to end.

Tasks

• Development of the PrivaSphere Technology and Platform (Front- and Backend), in particular

- Enable and execute the scaling of the current mid-sized special service to a

mass-calibrated, commercial global service (“Single Page”)

- Add new features and eventually new product lines

• Maintenance of a world-class automated security testing framework for quality assurance and efficient regression testing

• Documentation of the technology for a growing development organization and

due-diligence/audits

• Project Management

- Assist Sales in Offering new functionality to customers

- Support COO in all technical matters

- Advance DevOps, continuous deployment, hardening

Requirements

• Software development skills: Java / RDBMS / JavaScript + TypeScript / Angular / CSS / Docker / Kubernetes

• Solid knowledge of Java-related frameworks and technologies (e.g. Tomcat/JSP, JDBC, JavaMail)

• Team Player, Team Leader

• Ready to settle in the Zürich area with a long-term commitment

• Capable of conceptual advancement of the technology

• Self-starter, relentless personality fitting into a growth environment, motivated for highest performance in particular in the area of security, end-user focus.

Nice to haves

• Background in IT security and cryptography (JSSE/JCE, openssl, gnupg, BouncyCastle)

• Experience with automated testing frameworks (e.g. JUnit, Cypress)

• Understanding of messaging topics (basic experience with MTAs such as Postfix advantageous) and operating systems (basic Linux/Windows admin skills)

Benefits

Take the opportunity to co-shape a leading Swiss IT Security platform in its growth phase, working closely with senior leadership and influencing both technology and product direction.

We are looking for someone to bring in new ideas and show new ways to deliver to our customers the best experience possible as well as a fun addition to the team.

We are looking forward to your application and resume.

Senior Software Engineer, Block Production - Anza

Who We Are
Anza is a Solana R&D lab pushing the boundaries of blockchain performance and scalability. Anza was founded by experienced executives and core engineers solving the toughest problems in Web3. Crypto ecosystems rely on robust protocols, and we believe those are best built out in the open, with multiple contributors. We pioneer advanced solutions to meet the evolving demands of decentralized applications.

The Role
As a Software Engineer specializing in block production, scheduling, and verification, you will play a critical role in fortifying Anza's Agave client and the broader Solana network. This team owns the core pipeline between networking and the runtime, responsible for processing ingested transactions and coordinating block-production and verification.

Your work will directly contribute to the efficiency and reliability of our blockchain infrastructure, ensuring seamless and timely block production, scheduling, and verification. You will focus on optimizing the processes that underpin the generation and propagation of blocks, ensuring they are secure, performant, and scalable to meet the demands of future growth.

Responsibilities

• Develop and Optimize Block Production: Design, implement, and optimize the mechanisms for block production to enhance the throughput and stability of the Solana network
• Efficient Scheduling: Develop and refine scheduling mechanisms for both block production and block verification, enabling efficient transaction processing, fair resource allocation, and predictable performance.
• Ensure Security and Integrity: Identify and mitigate potential security vulnerabilities within the pipeline, ensuring robust protection against emerging threats
• Scalability and Performance: Work on improving the scalability of the pipeline to handle increasing transaction volumes and validator participation without compromising on performance
• Testing and Validation: Create and execute comprehensive tests to validate the reliability and efficiency of the block production, block verification, and scheduling mechanisms, including stress tests, fault injection, and performance benchmarking
• Collaboration: Collaborate with cross-functional teams, including core protocol engineers, security experts, and infrastructure teams, to ensure the seamless integration and functioning of the block production components
• Documentation and Code Review: Maintain thorough documentation of the block production and scheduling protocols and conduct peer code reviews to uphold high standards of code quality and consistency
• Shared-Memory Systems: Design and maintain high-performance shared-memory interfaces between scheduling and execution stages, enabling low-latency coordination and efficient data movement across the validator pipeline

Requirements
What You'll Bring

• Experience: A Bachelor's degree in Computer Science, Engineering, or equivalent practical experience and 3+ years of hands-on experience with core infrastructure software and distributed systems
• Technical Expertise: Strong proficiency in systems programming languages such as Rust, C or C++. Experience with distributed systems, and blockchain technology is highly desirable
• Problem-Solving Skills: Ability to analyze complex systems, identify potential issues, and develop effective solutions
• Security Mindset: Knowledge of common security threats and best practices in securing block production processes
• Performance Optimization: Experience with performance profiling and optimization techniques
• Collaboration and Communication: Excellent teamwork and communication skills, with the ability to work effectively in a collaborative environment

Preferred Qualifications

• Familiarity with Linux, systems automation tools, and systems architecture
• Deep understanding of , architecture, and principles underlying distributed systems
• A knack for designing secure protocols, software, and algorithms that minimize trust requirements
• Active participation in Bitcoin/Ethereum/Blockchain projects or the open-source community is highly desirable

Benefits
Why Join Anza?
We offer a dynamic, fast-paced environment where innovation and problem-solving are at the heart of everything we do. Here, your work will have a direct impact on the security and scalability of blockchain technology, contributing to the foundation of decentralized applications worldwide.

We're excited to welcome individuals who share our passion for pushing the boundaries of blockchain technology. If you're ready to take on the challenge and contribute to the next generation of blockchain infrastructure, we'd love to hear from you.

The salary range for US-based candidates will be determined throughout the interview process depending on experience, skill, and location. Candidates should anticipate an annual base salary (not including incentive compensation or other benefits) of $180,000 USD to $300,000 USD.

Auterion builds a cutting-edge operating system for autonomous robotic systems that empower a diverse range of platforms to perform surveillance, reconnaissance, defense, inspection, mapping and logistics tasks. Our industry-leading software drives the adoption of robotic fleets and is recognized by the U.S. government as the future standard for its drone programs.

You'll join our Computer Vision team, working on AuterionOS at the application level: camera data streaming, multi-sensor synchronization, and pipeline architecture. You'll work daily with Linux on embedded hardware, C++, Python and Bash, alongside a friendly, engaged engineering team.

Responsibilities

• Work within the Computer Vision Team and collaborate with other teams (hardware development & customer-facing).
• Design, build and maintain camera data pipelines on AuterionOS - streaming, multi-sensor sync, and pipeline architecture.
• Add features, solve bugs, write tests and improve the performance of software components running on AuterionOS, Auterion's custom embedded Linux distribution.
• Ensure that the team's products work reliably in platforms used by internal and external customers.
• Propose new software solutions and take ownership of the implementation. Your technical expertise will have a huge impact on bringing Auterion's drone products to market.
• Contribute to internal documentation and the public knowledge base; join stand-ups and release planning.

Qualifications and Skills

• B.Sc./M.Sc. in Computer Science, Software Engineering, or related fields.
• 2+ years of experience writing object-oriented C++ and/or Python code in a professional setting.
• Extensive experience working with embedded architectures, including cross-compilation, debugging, and performance optimization.
• Solid Linux fundamentals — kernel basics, systemd, device drivers, device tree, bootloaders (u-boot).
• Comfortable managing Docker environments and Debian packaging.
• Experience with video streaming technologies (MIPI CSI, gstreamer).
• Bonus: electrical engineering experience, familiarity with schematics and the instrumentation required to debug communication over I2C, SPI, UART, CAN bus.
• Bonus: experience with NXP i.MX and NVIDIA Jetson platforms.
• Bonus: ROS1/ROS2 experience
• A product-oriented and hands-on mindset, with an eagerness to drive forward project initiatives, pulling in resources from across the organization.

Benefits

• Flexible working hours & hybrid workplace
• Stock Options
• Generous holiday allowance
• Pension plan
• Car parking
• Enhanced maternity & paternity leave
• Mental health and wellbeing support
• Flyday Friday - Fly a drone (1/x month)
• Regular team social

About Auterion
We are building the leading software platform for AI-powered autonomous systems for enterprise and government customers. Our team is supporting the most important missions and solving the most challenging problems.

At Auterion, we bring together the sharpest minds who love to solve the hardest problems. Join a vibrant team built on innovation, openness, and excellence, where you'll be empowered to develop ideas, collaborate across all levels, and make an impact that matters.

Role Overview

Citadel Securities is seeking an exceptional Platform Engineer to join our Research Platform Engineering team in Miami, Zurich or New York. Our Research Platform teams are at the forefront of designing and developing the distributed systems, data platforms, and research infrastructure that power large-scale simulations, analytics, and model development across the firm. These systems are critical in allowing researchers to transform data into actionable insights and alpha-generating trading strategies.

Locations

New York, Miami, Zurich

Responsibilities

• Design and build distributed platforms and services that support quantitative research, simulations, AI-powered applications, and large-scale analytics workflows
• Develop scalable platform services and data systems for ingestion, transformation, storage, and lifecycle management of large datasets
• Build and maintain backend services, APIs, and SDKs that improve researcher productivity and self-service capabilities
• Improve performance, reliability, and scalability of critical research systems operating in high-throughput environments
• Collaborate closely with researchers and engineers to translate research requirements into production-read systems

Qualifications

• Bachelor’s degree in Computer Science or a related field
• 3+ years of professional software engineering experience
• Strong programming skills in Python, Go, or C++, or similar systems-oriented languages
• Experience building and operating distributed systems in production environments
• Experience designing scalable backend services, APIs, and data-intensive applications
• Strong understanding of distributed systems, data-intensive applications, and system design fundamentals
• Experience with cloud platforms (AWS, GCP, Azure) and modern infrastructure technologies
• Experience with technologies such as Kafka, Kubernetes, Spark, Airflow, distributed databases, or similar systems is a plus

Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.

About Citadel Securities

Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing and seamless front-to-back execution in a broad array of financial products. Our teams of engineers, traders and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com.