Principal Engineer (Full Stack) — Go / GCP / AI

Synthix is building a SaaS native marketplace of financial solutions—a tech first platform that plugs into client workflows and connects them to an ecosystem of partners (banks, PSPs, ERPs, and data providers) through a single integration. We combine institutional credibility and reach with startup level engineering agility. We are deliberately strengthening our engineering capability with inspirational, hands on technical leadership—people who ship, raise the bar on quality, and deliver enterprise grade reliability at fintech speed. This is a builder role. You’ll be a Principal level engineer who codes regularly, sets technical direction through doing, and helps scale a high performance product engineering culture.

What we’ll offer you:

• Hybrid Working - we understand that employee expectations and preferences are changing. We have implemented a model that enables eligible employees to work remotely for a part of their working time and reach a working pattern that works for them.
• Competitive salary and non-contributory pension.
• 30 days’ holiday plus bank holidays, with the option to purchase additional days.
• Life Assurance and Private Healthcare for you and your family.
• A range of flexible benefits including Retail Discounts, a Bike4Work scheme and Gym benefits.
• The opportunity to support a wide ranging CSR programme + 2 days’ volunteering leave per year.

Your key responsibilities:

• Develop production ready features in Go, delivering robust backend services and APIs alongside full stack solutions spanning UI, data, performance, and operability.
• Establish and continuously improve engineering practices including service templates, libraries, developer experience (DX), and CI/CD pipelines.
• Provide technical leadership by clarifying architecture decisions, navigating trade offs, and defining clear “golden paths.”
• Mentor engineers to improve code quality, system design, debugging skills, and readiness for production deployment.
• Drive reliability and operational excellence through improved observability, incident response, resilience (SLOs, error budgets, postmortems), and scalable delivery processes.
• Build AI driven features with measurable impact, focusing on evaluation, feedback loops, safety, cost controls, and practical AI patterns such as retrieval, workflow automation, copilots, and intelligent triage.

Your skills and experience:

• Principal or Staff Engineer experience in fintech or high scale SaaS, including regulated environments, with a proven record of personally shipping core platform or product capabilities (marketplaces, integrations, partner ecosystems, developer platforms).
• Strong production expertise in Go and modern backend engineering, including APIs, microservices, event driven and distributed systems, data handling, SRE practices, IaC (e.g. Terraform), and Kubernetes.
• Extensive hands on experience running production workloads on Google Cloud Platform (GCP), covering security, networking, IAM, deployments, observability, and cloud native operations.
• Full stack capability, taking product requirements from architecture through implementation to production operations.
• Recent hands on coding experience (last 6–12 months), with deep debugging skills, systems thinking, and ownership in live environments; experience implementing AI features in production (e.g. RAG, tool integration, evaluation, monitoring, model/vendor selection).
• Clear evidence of engineering passion: curiosity, craftsmanship, continuous learning, a strong bias to build, and a focus on simplifying complexity and improving developer experience in fast paced, regulated fintech or large-scale SaaS contexts.

How we’ll support you:

• Training and development to help you excel in your career.
• A culture of continuous learning to aid progression.
• A range of flexible benefits that you can tailor to suit your needs.
• We value diversity and as an equal opportunities’ employer, we make reasonable adjustments for those with a disability such as the provision of assistive equipment if required (e.g. screen readers, assistive hearing devices, adapted keyboards).

About us:

Deutsche Bank is the leading German bank with strong European roots and a global network. Deutsche Bank in the UK is proud to be named in The Times Top 50 Employers for Gender Equality and has been awarded a Gold Award from Stonewall and named in their Top 100 Employers. We strive for a culture in which we are empowered to excel together every day. This includes acting responsibly, thinking commercially, taking initiative and working collaboratively. Together we share and celebrate the successes of our people. Together we are Deutsche Bank Group. We welcome applications from all people and promote a positive, fair and inclusive work environment.