Senior Ruby on Rails Developer – Freelance

We’re looking for a pragmatic, experienced Senior Ruby on Rails Developer to take ownership of key backend systems across our platform. In this freelance role, you’ll play a pivotal part in ensuring the performance, scalability, and reliability of our e-commerce infrastructure. From designing robust APIs to refining data models and optimizing performance at scale, you’ll be central to the continued growth and stability of our tech stack.

Join us and help shape the backend foundation of a fast-moving, product-focused e-commerce business.

Contract: Freelance (6 months, renewable)

Location: Remote (with CET timezone overlap)

Start: ASAP

Contact: Armand Fardeau, Head of IT

Mission Focus

We're Looking For a Senior Ruby On Rails Developer To Join Our Core Backend Team As An Independent Contractor. This Mission Is Central To Our Platform’s Performance, Scalability, And Reliability. You’ll Contribute To Key Backend Initiatives Focused On

• API development for internal and external clients
• Data modeling and business logic in support of our e-commerce and operational features
• Performance optimization, ensuring robust response times and system throughput at scale
  
  

You’ll be embedded in a backend team of 5 and collaborate closely with our frontend engineers and product managers.

Key Deliverables

• API Services: Design, build, and maintain scalable RESTful APIs
• Domain Modeling: Extend and optimize business logic using ActiveRecord and PostgreSQL
• Performance Tuning: Optimize queries, background jobs (Sidekiq), and caching strategies (Redis)
• Code Quality & Testing: Ensure high-quality, maintainable code with RSpec, RuboCop, and SimpleCov
• Security by Design: Apply secure coding practices and data protection principles
  
  

Success Metrics & Reporting

• Performance: Fast, reliable APIs (response times, throughput)
• Velocity: Timely delivery of scoped tasks with minimal bugs
• Stability: Low downtime, high availability, and resilient code Team Feedback: Strong collaboration and communication across product and frontend teams
  
  

Weekly check-ins and async updates are expected.

Collaboration & Tools

• Team: Backend team (5 developers), Frontend team, Product managers
• Stack: Ruby on Rails, PostgreSQL, Sidekiq, Redis, REST APIs, ActiveRecord
• Tooling: Bitbucket, CircleCI, Heroku, Docker
• Testing & Quality: RSpec, RuboCop, SimpleCov
• Workflow: Jira, Slack, Figma
  
  

Contract & Payment

• Invoicing: Monthly
• Legal: NDA required
• Timezone: Must maintain at least 5 hours overlap between 08:00–18:00 CET
• Remote: Fully remote, European time zone preferred but not mandatory
  
  

Next Steps

If You’re Interested, Please Share

• Your availability (start date)
• Your hourly or daily rate (in EUR)
• A few relevant project examples or references
• Your GitHub or portfolio
  
  

Department IT department Remote status Fully Remote

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Workplace and culture

Hey there! 👋 We’re GOLD AVENUE, and we’re here to shake up the world of precious metal investment. If you think gold is just an old and dusty metal, well, our goal is to prove you wrong.

Do Most Precious Metals Online Resellers You Know Have a 1990’s Looking Website, a Long List Of Hard-to-understand Products, Somewhat Cheap And Obscure Prices, And No Solution To Store Or Resell Your Gold? Well, We Have The Opposite

• A UX-friendly website: making it as simple as buying socks (are socks easy to buy?)
• a brand new mobile app: putting gold investment at your fingertips
• Clean and crisp design: we like it easy on the eye
• Transparent and simple pricing: because we hate complexity, don’t you?
• The best all-in-one solution on the market: or should we say… in Europe?
• A multilingual and expert customer service: did we say we like to make things simple?
• Enjoyable educational content: helping you understand what makes gold tick
  
  

That’s because we’re on a mission to do things different, and make gold investment accessible to everyone.

Why You’ll Love Working With Us

• 💥 To make an impact: Your work will directly help people across Europe invest smarter and feel more secure about their future.
• 🌱 To grow with us: We’re all about learning and growing together. Whether you’re a newbie or a pro, there’s always room to level up here.
• 🌴 To send you great vibes: We believe work should be fun and fulfilling. Join a team that’s friendly, supportive, and ready to celebrate every win, big or small.
• 😎 To enjoy a flexible work life: Need to work from home sometimes? No problem. We value balance and understand life’s demands.
  
  

Why we love working here ❤️

We might be 7 years old but we keep the positive startup mentality that's been with us from the start. Our company culture mixes a keep pushing attitude with a focus on our team's well-being in this fast-paced and often remote world.

In other words, we care about being flexible, caring, and human with our team, and we welcome anyone who brings a unique perspective, some cool ideas and skills, and most importantly a sense of ownership and hard work to accomplish great things together!

Want more perks? Well, we’ve got more! Office in Geneva’s old town with a shaded courtyard for summer lunches, showers for those who like a run around the lake, ping-pong table to show your skills, free snacks, coffee, tea, fruits, in the kitchen, etc. And because it’s not only about work, we also like to organize a yearly summer company retreat to enjoy a few days all together in a nice location, and of course company parties and afterworks throughout the year.

Who we are? We’re a diverse crew with a shared passion for making precious metals accessible to everyone. We’re proud to be leaders in the market, but we’re even prouder of our awesome team. If you’re looking for a place where your ideas matter and your work makes a difference, GOLD AVENUE is the spot for you.

Join us in shaping the future of precious metal investments. Let’s create something great together!

About GOLD AVENUE

With more than 60 years in the industry, MKS PAMP GROUP has always searched for innovative ways to move across the value chain to better serve our customers. With the creation of GOLD AVENUE, we wanted to get closer to our end clients in order to serve them straight from the source and directly share with them our passion for precious metals.

Co-workers about 30

IT department

• Geneva
• Fully Remote
  
  

Senior Ruby on Rails Developer – Freelance

Join our core backend team to build scalable APIs, optimize performance, and power a growing e-commerce platform. Own impactful features, fast, stable, secure.

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@pamp.com

GOLD AVENUE is a company that aims to make precious metal investment accessible to everyone. They have a user-friendly website, a mobile app, and transparent pricing. The company has a multilingual and expert customer service, and provides enjoyable educational content to help customers understand the gold market.