At a Glance
- Tasks: Design and build high-performance financial systems using Go (Golang) in a dynamic environment.
- Company: Join Delio, a leading fintech innovator in Cardiff with a collaborative culture.
- Benefits: Enjoy competitive salary, hybrid working, 25 days holiday, and private medical insurance.
- Other info: Be part of a supportive team with excellent growth opportunities.
- Why this job: Tackle complex data challenges and shape the future of financial infrastructure.
- Qualifications: Strong Go development skills and experience in data-intensive environments required.
The predicted salary is between 60000 - 75000 € per year.
Location: Cardiff, Wales (Flexi - 3 days in office)
About Us
The Delio Core OS platform supports the full private markets lifecycle, from deal origination and execution through to ongoing portfolio monitoring and reporting. The role sits specifically within the portfolio monitoring and analytics layer, focused on building high-performance systems that process complex financial data at scale. Our platform handles large volumes of capital, positions, and holding with strict requirements around accuracy, auditability, and performance, and we are investing heavily in scalability, reliability, and long-term architectural growth.
The role
We are looking for a highly skilled Go (Golang) Developer to design and build large-scale financial calculation services that power our platform. This is not a typical web development role; this role is for someone who thrives in high-performance, data-intensive backend systems. You will play a key role in building and scaling a core calculation engine that supports portfolio analytics and financial modelling.
Key responsibilities
- Design and develop high-performance services in Go (Golang)
- Build and optimise large-scale financial calculation engines
- Build systems that accurately process and reconcile high volumes of capital, positions, and holdings
- Architect systems for scalability, reliability, and low latency
- Work with complex, high-volume datasets and portfolio logic
- Collaborate with frontend/backend teams to integrate services
- Contribute to system design, performance tuning, and infrastructure decisions
Technical Requirements
- Strong commercial experience with Go (Golang)
- Proven experience working within a high-data environment (e.g. fintech or similar data-intensive industries)
- Experience building scalable backend systems
- Strong understanding of data processing, performance optimisation, and system design
- Experience designing and working with APIs
- Experience in financial systems or portfolio management platforms
- Familiarity with microservices architecture
- Knowledge of distributed systems and Go concurrency patterns
- Experience with cloud infrastructure (AWS, GCP, or similar)
- Ability to leverage AI tools to improve development workflows and efficiency
- Experience supporting integration with a PHP Laravel-based presentation layer
- Ability to help bridge backend calculation services with frontend delivery
What We’re Not Looking For
- CRM-focused developers
- Generalist engineers without deep backend or data experience
This is a high-skill role focused on core system performance and scalability.
Ideal Candidate Profile
- Backend-first engineer with experience in data-heavy systems
- Strong problem solver with a focus on performance and scale
- Comfortable working in complex, high-volume data environments
- Interested in leveraging modern tooling, including AI-assisted development
- Able to take ownership of critical system components
Why Join Delio
- Work on mission-critical financial infrastructure
- Solve complex scaling and data challenges
- Be part of a high-calibre engineering environment
- Opportunity to shape the architecture of a growing platform
What We Offer
- Competitive salary based on experience
- Hybrid working – based in or around Cardiff. We operate a hybrid working model with a minimum 3 days per week in the office - with Wednesday and Thursday being obligatory office days
- A friendly, supportive and innovative team culture
- Opportunities for professional growth and training
What You Can Expect:
- 25 days holiday (plus bank holidays), increasing with length of service
- Extra day off for your birthday
- Private medical insurance and Death-in-service benefit
Senior Go Developer - Financial Systems in Cardiff employer: Delio
Delio is an exceptional employer that fosters a high-calibre engineering environment in Cardiff, offering a unique opportunity to work on mission-critical financial infrastructure. With a strong focus on professional growth, a supportive team culture, and a hybrid working model, employees can thrive while tackling complex scaling and data challenges. The company also provides competitive salaries, generous holiday allowances, and comprehensive benefits, making it an attractive place for skilled developers seeking meaningful and rewarding employment.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Go Developer - Financial Systems in Cardiff
✨Tip Number 1
Network like a pro! Reach out to folks in the fintech space, especially those who work with Go. Attend meetups or online events, and don’t be shy about asking for informational chats. You never know who might have a lead on that perfect role!
✨Tip Number 2
Show off your skills! Create a GitHub repo showcasing your Go projects, especially those related to financial systems. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for technical interviews by brushing up on your Go knowledge and system design principles. Practice coding challenges that focus on performance optimisation and data processing. We want you to shine when it comes to those tricky questions!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who are genuinely interested in joining our team at Delio.
We think you need these skills to ace Senior Go Developer - Financial Systems in Cardiff
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the role of Senior Go Developer. Highlight your experience with Go (Golang) and any relevant projects that showcase your skills in building high-performance systems. We want to see how your background aligns with our needs!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you're passionate about working with financial systems and how your expertise can contribute to our platform. Keep it concise but impactful – we love a good story!
Showcase Your Problem-Solving Skills:In your application, don’t forget to mention specific examples where you've tackled complex data challenges or optimised system performance. We’re looking for someone who thrives in high-data environments, so let us know how you’ve made a difference!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen on joining our team at Delio!
How to prepare for a job interview at Delio
✨Know Your Go
Make sure you brush up on your Go (Golang) skills before the interview. Be ready to discuss your experience with building high-performance services and how you've tackled challenges in data-intensive environments. They’ll want to see your depth of knowledge, so prepare some examples of your past projects.
✨Understand Financial Systems
Since this role is focused on financial calculation services, it’s crucial to have a solid understanding of financial systems and portfolio management. Familiarise yourself with concepts like capital, positions, and holdings, and be prepared to discuss how you’ve worked with these in previous roles.
✨Showcase Problem-Solving Skills
This position requires a strong problem solver, so think of specific instances where you’ve had to optimise performance or scale systems. Be ready to explain your thought process and the impact of your solutions. They’ll appreciate your ability to tackle complex challenges head-on.
✨Familiarise with Microservices and Cloud Infrastructure
Get comfortable discussing microservices architecture and cloud infrastructure, especially if you have experience with AWS or GCP. They’ll likely ask about how you’ve integrated services and managed distributed systems, so having concrete examples will help you stand out.
