Software Engineer in City of London

This range is provided by Synexus. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $130,000.00/yr - $160,000.00/yr.

At Synexus, we’re helping advertisers rethink how they show up in the news ecosystem. After a successful investment round, we are now in the process of launching a new brand and product to the Ad tech market. Blunt keyword blocking causes brands to avoid entire news sites—even when the content is high‑quality, balanced, and aligned with their values. Instead of just scanning keywords, Synexus analyzes how topics are being discussed, allowing advertisers to safely reintroduce premium journalism into their media plans—driving better reach, performance, and efficiency without added risk. We model positivity, respect, accountability, and outcomes focus and surround ourselves with people who want to improve everything and support everyone around them.

Key Responsibilities

• Enhance and maintain our open web crawling system, solving edge cases such as paywalled or obfuscated content to ensure reliable and comprehensive data collection.
• Build and optimise internal tools and infrastructure that empower data scientists and analysts to access and explore large‑scale data with speed and minimal friction.
• Support our transition from batch to real‑time data processing, including the design and implementation of queue‑based pipelines and event‑driven architectures.
• Develop and maintain data integrations with key demand‑side platform (DSP) partners, ensuring reliable and secure data delivery at scale.
• Contribute to core engineering practices such as code reviews, testing, observability, and CI/CD to help grow a robust, maintainable codebase.
• Work across the stack as needed, whether improving backend performance, helping with API design, or optimizing data workflows.

Essential Experience And Behaviours

• 3+ years of experience building and maintaining production systems.
• Strong proficiency in Python, with experience writing clean, maintainable, and well‑tested code.
• Experience working with AWS services (e.g., EC2, S3, Lambda, CloudWatch, ECS/Fargate), focusing on reliable and scalable infrastructure.
• Solid understanding of relational databases, particularly PostgreSQL, and experience writing efficient queries and managing schema changes.
• Familiarity with data pipelines or event‑driven architectures, including tools like message queues (e.g., SQS, Kafka, or similar).
• Strong debugging and problem‑solving skills, with the ability to navigate ambiguity and prioritise effectively.
• Experience with CI/CD pipelines and version control systems, like Git, to ensure smooth development workflows.
• Excellent communication and collaboration abilities, to work effectively within a small, cross‑functional team.

Desirable Experience And Behaviours

• Experience working as part of a remote/virtual team.
• Experience building or working with web crawlers, especially at scale or in complex environments (e.g., dynamic or paywalled content).
• Exposure to data engineering or supporting analytics workflows (e.g., building internal APIs, data tooling, or orchestration systems).
• Interest in or experience with ad tech ecosystems or API integrations with external partners.
• Experience using project and task management tools for agile development (e.g., Jira, Asana, etc.).
• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Successful experience working with team members across countries and time zones.
• Comfortable working in rapid response and in on‑call rotations.

Additional Information

• Competitive salary (Gross annual salary in the region of USD130k‑160k).
• Health, dental, and vision benefits (US‑based team only).
• Flexible working hours and remote options. Full‑time, 1.0 FTE (37.5 per week).
• Some national/international travel may be required on occasion.
• As a global organization, some flexibility for cross‑time‑zone communication to be available for limited virtual meetings outside of office hours is required.
• Professional development opportunities.
• We celebrate diversity and are committed to creating an inclusive environment for all employees. Our employees are central to our mission and to our impact and we know that having varied perspectives helps generate better ideas to solve the complex challenges.