Senior Python/AI Developer

Ocho People; Belfast; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A global cybersecurity firm is seeking a Senior Python/Rust Engineer for a hybrid role in Belfast. You will design and deliver high-performance services for mission-critical encryption products, working in an Agile team. The ideal candidate possesses experience in Python and a strong interest in Rust, along with a background in developing scalable distributed systems. This position offers a competitive salary and benefits, including a bonus, share options, and private healthcare from day one.

Benefits

Up to 20% bonus

Share options

Private healthcare for you + your family

Hybrid working

Collaborative engineering culture

Qualifications

• Significant commercial experience developing enterprise-grade software in Python.
• Strong interest in Rust for systems-level development.
• Experience building scalable distributed systems and cloud services.

Responsibilities

• Develop robust services in Python for enterprise-scale distributed systems.
• Collaborate with architects and QA to design and deploy solutions.
• Engage in Agile rituals and continuously improve the engineering process.

Skills

Python development

Rust (or interest in Rust)

Distributed systems

Database skills (SQL & NoSQL)

Problem-solving

OO design principles

Tools

AWS

Azure

GCP

CI/CD pipelines

Job description

Senior Python / Rust Engineer- Hybrid role - Exciting new global cybersecurity business to Belfast.

About the Company

Ocho are delighted to be partnering exclusively with a fast-scaling global cybersecurity business building encryption technology to secure critical data and communications across finance, defence, telecoms, and national infrastructure. The company combines cutting-edge encryption intelligence with cloud-scale engineering to stay ahead of today's and tomorrow's cyber threats.

This is your chance to work with a team of exceptional engineers, architects, and DevOps specialists tackling some of the most complex challenges in cloud security and distributed systems.

Ocho recently placed with this client with fantastic feedback from both the client and candidate. They have 5 other hires joining over the next month so now is a very exciting time to come on board.

The Role

We're looking for a Senior Python /AI Developer who is passionate about building scalable, resilient software and excited to broaden into Rust (or bring Rust experience with them).

You’ll be designing and delivering high-performance services that underpin mission-critical encryption products, working across the full delivery lifecycle - from architecture through to deployment - in an Agile team where autonomy and ownership are encouraged.

Key Responsibilities

• Develop robust services in Python for enterprise-scale distributed systems.
• Apply best practices in OO design, refactoring, and scalable architecture.
• Contribute to Rust components and cross-train in modern systems languages.
• Collaborate with architects, DevOps, and QA to design, review, test, and deploy solutions.
• Deliver horizontally scalable, cloud-native applications (AWS, Azure, GCP).
• Triage and resolve complex issues in distributed systems.
• Engage in Agile rituals, mentoring peers, and continuously improving the engineering process.

Essential Criteria

• Significant commercial experience developing enterprise-grade software in Python.
• Exposure to (or strong interest in) Rust for systems-level development.
• Experience building scalable distributed systems and cloud services (SaaS, PaaS).
• Database skills (SQL & NoSQL).
• Competence in multiple languages (Python, plus ideally Rust, C++, or TypeScript).
• Experience with design patterns, OO principles, and software best practice.
• Strong analytical, problem-solving, and debugging skills.
• Track record of delivering results with autonomy and accountability.
• Right to live and work in the UK.

Desirable (Nice to Have)

• Prior exposure to cybersecurity or encryption.
• Startup / scale-up engineering experience.
• Experience with Rust, Angular, or C++.
• CI/CD pipelines (Azure DevOps, Helm, Flux).
• Linux and Windows development experience.
• Experience mentoring or supporting junior developers.

Why Join

• Work on cutting-edge quantum-safe encryption systems.
• Core focus on Python development with opportunity to grow into Rust.
• Hybrid/remote flexibility with a Belfast base.
• Be part of a collaborative, ambitious engineering culture that values innovation.
• Competitive salary, bonus, and strong benefits which includes:
• Up to 20% bonus
• Share options (valued at ~20% of salary over 4 years)
• Private healthcare for you + your family (from day one, covering even pre-existing conditions)
• Hybrid circa 2 days working from a modern Belfast HQ
• Small, collaborative, "no-ego" engineering culture
• The chance to work on cutting-edge encryption tech with real-world global impact

How to Apply

If you're a Senior Python Engineer with an interest in Rust, distributed systems, and cybersecurity, this is the perfect opportunity. Apply via this link, or reach out directly to Phil Gamble at Ocho for an informal chat via LinkedIn or WhatsApp.