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- Tasks: Design and develop Go-based services for innovative payment gateway solutions.
- Company: Join COLIBRIX ONE, a leader in AI-powered payment technologies.
- Benefits: Competitive salary, flexible work arrangements, and continuous learning opportunities.
- Why this job: Shape the future of fintech while making a real impact on the digital economy.
- Qualifications: 3-5 years of Go development experience and strong collaboration skills.
- Other info: Dynamic team culture that values your ideas and expertise.
The predicted salary is between 48000 - 72000 £ per year.
Join COLIBRIX ONE – Innovating the Future of Payments. At COLIBRIX ONE, we’re building advanced, AI-powered payment technologies that support Payment Service Providers (PSPs), Electronic Money Institutions (EMIs), and neobanks across the EU and the UK. We provide comprehensive, real-world financial solutions that include:
- Global card processing
- Digital wallet infrastructure
- Cross-border merchant accounts
- Alternative payment methods (APMs)
- Corporate accounts for legal entities
We’re a fast-growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact - and we’re looking for talented professionals who are ready to shape the future of fintech. If you’re eager to solve meaningful challenges and build with purpose, we’d love to hear from you.
We’re seeking an experienced Go Engineer to join our team and contribute significantly to our payment gateway product. The ideal candidate will bring deep technical expertise, a collaborative mindset, and the ability to influence and mentor team members through knowledge and experience rather than formal authority.
About the project: Payment gateway solutions - fintech product that securely connects merchants and financial institutions to process online payments in real time. It handles transaction routing, encryption and tokenization, fraud and risk checks, and integration with acquirers, payment aggregators and alternative payment methods. The Payment Gateway supports high availability, scalability, and compliance with PCI DSS and PSD2.
Tech stack: Go, PostgreSQL/MySQL, MongoDB/Redis, Kafka, NATS, REST/gRPC, AWS, GitLab CI/CD, Prometheus, Grafana.
Key responsibilities:
- Design and develop Go-based services for the payment gateway and related fintech systems, focusing on stability, fault tolerance, and correct handling of financial operations.
- Translate business requirements into clear technical specifications and propose concrete solutions at the service and module level, including API design, data models, and integrations with external providers.
- Build solutions in compliance with security requirements, including PCI DSS, proper handling of sensitive data, and secure inter-service communication.
- Analyze and optimize service performance, including code profiling, concurrency handling, and efficiency of data storage and network interactions.
- Participate in the architecture of microservices: service boundaries, communication patterns, load balancing, error handling, queues/streaming, and data storage approaches.
- Produce maintainable, testable code with appropriate unit and integration test coverage, following team development standards.
- Participate in code review as part of the development process: evaluate implementations, identify issues, and provide constructive feedback aligned with technical requirements.
- Contribute to technical discussions by offering concrete, practical solutions within the current architecture and development processes.
Requirements:
- 3–5 years of Go development experience focused on backend systems, and around 5 years of experience working with fintech applications.
- Understanding of distributed systems, microservices architecture, and API design, including REST/RPC transports.
- Experience working with SQL and NoSQL databases, message brokers (Kafka, NATS), and caching systems.
- Familiarity with CI/CD practices and tools, preferably GitLab.
- Experience working with the AWS cloud platform.
- Ability to contribute expertise and collaborate with the team on technical solutions.
- Strong communication skills and the ability to explain complex technical ideas to colleagues with varying levels of technical background.
- Fluency in written and spoken English.
- Experience in the fintech domain.
- Security-by-design mindset: ability to design solutions with security considerations built in at every stage.
- Understanding of regulatory requirements in the fintech space (e.g., PCI DSS, GDPR).
- Experience in performance optimization and building high-availability systems.
- Experience with observability tools: logging, metrics, tracing (Prometheus, Grafana, OpenTelemetry).
- Experience integrating with external payment providers, processors, or anti-fraud systems.
What We Offer:
- Opportunity to shape the future of fintech solutions within a growing company.
- Collaborative, horizontal team structure that values your expertise and ideas.
- Continuous learning and development opportunities to enhance your skills and career growth.
- Competitive salary and benefits package.
- Flexible work arrangements to support work-life balance.
Salary Range: 60,000 - 90,000 EUR gross annually.
Employment will be offered through one of the group’s legal entities - Mellifera Kartiera Ltd, Colibrix Ltd, or Mellifera Operations Ltd - depending on the role, location, and applicable legal framework.
Golang Engineer - Payment Gateway Solutions in London employer: COLIBRIX ONE
Contact Detail:
COLIBRIX ONE Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Golang Engineer - Payment Gateway Solutions in London
✨Tip Number 1
Network like a pro! Reach out to folks in the fintech space, especially those who work at COLIBRIX ONE. A friendly chat can open doors and give you insights that a job description just can't.
✨Tip Number 2
Show off your skills! If you've got a GitHub or portfolio showcasing your Go projects, make sure to share it. Real-world examples of your work can speak volumes more than just words on a CV.
✨Tip Number 3
Prepare for the tech interview! Brush up on your knowledge of distributed systems and microservices architecture. Be ready to discuss how you've tackled challenges in past projects, especially in fintech.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you're genuinely interested in joining the COLIBRIX ONE team.
We think you need these skills to ace Golang Engineer - Payment Gateway Solutions in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Golang Engineer role. Highlight your experience with Go, fintech applications, and any relevant projects you've worked on. We want to see how your skills align with our needs!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Share your passion for fintech and how you can contribute to our payment gateway solutions. Be sure to mention specific technologies from our stack that you’re familiar with.
Showcase Your Problem-Solving Skills: In your application, give examples of how you've tackled challenges in previous roles. We love candidates who can think critically and come up with innovative solutions, especially in a fast-paced environment like ours.
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 don’t miss out on any important updates about your application status!
How to prepare for a job interview at COLIBRIX ONE
✨Know Your Tech Stack
Make sure you’re well-versed in the tech stack mentioned in the job description, especially Go, PostgreSQL/MySQL, and Kafka. Brush up on your knowledge of microservices architecture and API design, as these are crucial for the role.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous projects, particularly in fintech. Be ready to explain how you approached these problems and the solutions you implemented, focusing on stability and security.
✨Understand Compliance and Security
Familiarise yourself with PCI DSS and GDPR regulations. During the interview, demonstrate your understanding of how to build secure systems and why security-by-design is essential in fintech.
✨Communicate Clearly
Practice explaining complex technical concepts in simple terms. The interviewers will appreciate your ability to communicate effectively with team members who may not have a deep technical background, so be prepared to adapt your explanations.
