At a Glance
- Tasks: Join a dynamic team to develop and maintain scalable Ruby on Rails applications.
- Company: Innovative tech company focused on operational SaaS platforms.
- Benefits: Competitive salary, hybrid work model, and opportunities for professional growth.
- Other info: Collaborative culture with excellent career advancement opportunities.
- Why this job: Make an impact by solving complex backend challenges in a fast-paced environment.
- Qualifications: Strong Ruby on Rails experience and a passion for backend engineering.
Location: London (Hybrid – 2 days per week onsite)
Salary: £65,000 to £85,000 (DOE)
The opportunity: We’re looking for a Mid / Senior Ruby Engineer to join a growing technology business building operational SaaS platforms used within large-scale, real-world environments. This role sits within a backend engineering team responsible for maintaining and evolving systems that support live operational workflows. You’ll work on modern Ruby on Rails applications that process high volumes of transactional activity, integrate with external systems, and support business-critical operational processes.
The environment is fast-paced and product-focused, with a strong emphasis on reliability, scalability, and engineering quality. You’ll work closely with Product, Platform, and Engineering teams to improve backend systems, strengthen operational stability, and support ongoing platform growth. This is a hands-on engineering role with ownership across backend services, integrations, and production systems. It would suit someone who enjoys solving complex backend challenges, improving platform reliability, and working collaboratively across technical teams.
What you’ll be doing: As a Senior Ruby Engineer, you’ll help maintain and evolve backend systems that support operational workflows and live production environments.
- Maintaining and improving Ruby on Rails applications supporting core operational processes
- Designing, building, and maintaining scalable backend services and APIs
- Writing clean, maintainable, and well-tested code
- Supporting platform reliability, scalability, and long-term maintainability
- Managing and improving integrations with third-party systems and APIs
- Optimising PostgreSQL database performance and background job processing
- Supporting AWS-based deployments and CI/CD processes alongside Platform teams
- Investigating, troubleshooting, and resolving production issues
- Improving monitoring, observability, and deployment confidence
- Collaborating closely with frontend, mobile, and product teams
- Contributing to backend architecture improvements and technical documentation
- Supporting continuous improvement across engineering standards and delivery practices
- Taking ownership of systems that directly support live operational environments
What we’re looking for:
Essential experience:
- Strong commercial experience with Ruby on Rails within production environments
- Strong understanding of object-oriented programming and Rails architecture
- Experience building and maintaining scalable backend systems and APIs
- Strong PostgreSQL experience, including complex queries and performance optimisation
- Experience with Redis and Sidekiq for background job processing
- Experience working with REST APIs, JSON serialisation, and authentication methods such as JWT or SSO
- Experience working with AWS-based infrastructure
- Experience using Docker within development or production environments
- Experience troubleshooting and supporting live production systems
- Strong debugging and problem-solving capabilities
- Experience working within existing codebases and improving legacy functionality
- Strong communication and collaboration skills
- Experience working within Agile environments using Git/GitHub
Desirable / bonus experience:
- Experience working with SOAP/XML integrations
- Experience migrating serverless components into Rails applications
- Familiarity with Vue.js
- Experience supporting mobile applications or mobile-focused backend services
- Experience within regulated industries or operational B2B SaaS environments
- Experience improving CI/CD pipelines and deployment reliability
- Open-source contributions or technical blogging experience
About you:
- You enjoy solving complex backend engineering challenges
- You’re comfortable working across live production systems and operational platforms
- You care about reliability, scalability, and maintainability
- You take ownership and communicate proactively
- You enjoy collaborating across engineering, product, and platform teams
- You’re pragmatic, adaptable, and delivery-focused
- You thrive in fast-moving environments where engineering quality matters
Core technology stack:
- Ruby
- Ruby on Rails
- PostgreSQL
- Redis
- Sidekiq
- REST APIs
- AWS
- Docker
- Git / GitHub
- Vue.js (desirable)
Ruby On Rails Engineer employer: Fynity
Join a dynamic technology business in London as a Senior Ruby on Rails Engineer, where you'll be part of a collaborative and fast-paced environment focused on building scalable SaaS platforms. With a strong emphasis on employee growth, you will have the opportunity to work on challenging backend systems while enjoying a hybrid work model that promotes work-life balance. The company fosters a culture of innovation and continuous improvement, ensuring that your contributions directly impact operational success and platform reliability.
StudySmarter Expert Advice🤫
We think this is how you could land Ruby On Rails Engineer
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work with Ruby on Rails. A friendly chat can lead to referrals or insider info about job openings that aren't even advertised yet.
✨Tip Number 2
Show off your skills! Create a GitHub profile showcasing your Ruby on Rails projects. Potential employers love to see real examples of your work, so make sure to highlight any complex backend challenges you've tackled.
✨Tip Number 3
Prepare for technical interviews by brushing up on your problem-solving skills. Practice coding challenges and be ready to discuss your past experiences with backend systems, especially how you’ve improved reliability and scalability.
✨Tip Number 4
Don’t forget to apply through our website! We’re always on the lookout for talented Ruby Engineers, and applying directly can give you a better chance of standing out. Plus, it shows you're genuinely interested in joining our team!
We think you need these skills to ace Ruby On Rails Engineer
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your Ruby on Rails experience and any relevant projects you've worked on. We want to see how your skills align with the role, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you’re passionate about backend engineering and how you can contribute to our team. Keep it concise but engaging – we love a good story!
Showcase Your Problem-Solving Skills:In your application, mention specific challenges you've faced in previous roles and how you tackled them. We’re all about solving complex problems, so let us know how you’ve done this in the past!
Apply Through Our Website:We encourage you to apply directly through our website for a smoother process. It helps us keep track of applications and ensures you get the attention you deserve. Plus, it’s super easy!
How to prepare for a job interview at Fynity
✨Know Your Ruby On Rails Inside Out
Make sure you brush up on your Ruby on Rails knowledge before the interview. Be prepared to discuss your experience with building and maintaining scalable backend systems, as well as your understanding of Rails architecture. They’ll likely ask you about specific projects you've worked on, so have some examples ready that showcase your skills.
✨Showcase Your Problem-Solving Skills
Since this role involves troubleshooting live production systems, be ready to share how you've tackled complex backend challenges in the past. Think of specific instances where you identified a problem, implemented a solution, and improved system reliability. This will demonstrate your hands-on experience and ability to think critically under pressure.
✨Familiarise Yourself with Their Tech Stack
Take some time to understand the core technologies they use, such as PostgreSQL, Redis, and AWS. If you have experience with Docker or CI/CD processes, make sure to highlight that too. Showing that you’re not only familiar with these tools but also have practical experience using them will give you an edge.
✨Emphasise Collaboration and Communication
This role requires working closely with various teams, so it’s important to convey your collaboration skills. Prepare examples of how you’ve successfully worked with product, frontend, or platform teams in the past. Highlight your ability to communicate effectively and take ownership of projects, as this will resonate well with their team-oriented culture.
