Open to opportunities

Nicolas Miannay

@nmiannay

Message

I lead high-traffic fintech and consumer product backends with Node.js, TypeScript, React, and cloud infrastructure.

South Korea

Message

What I'm looking for

I'm looking to lead and build high-traffic products where APIs, data, cloud infrastructure, and practical architecture decisions directly improve the user experience.

I'm leading the backend architecture for Feels, a high-traffic dating application used by more than 50K daily active users. I build APIs, business rules, integrations, and data systems with Node.js, Express.js, PostgreSQL, and Redis.

I improved profile recommendation and matching relevance, optimized data architecture and queries, and shipped a predictive profile-quality scoring model using Python, Machine Learning, Vertex AI, Gemini, and GCP.

Across October, Neocredit.ch, and Credit.fr, I built lending and investment platforms, migrated legacy code to TypeScript, designed configurable borrower pipelines, and automated investment workflows with AWS Lambda and Step Functions.

I've spent 13+ years building full-stack products, including 9 years in fintech. My work spans React, Next.js, Ruby on Rails, AWS, Terraform, Docker, and scalable systems handling concurrency and growth.

Experience

Work history, roles, and key accomplishments

Current

Lead Backend Developer

Current

Feels

Oct 2023 - Present (2 years 11 months)

Led architecture and development of a high-traffic dating application backend used by more than 50K daily active users. Developed new backend features, optimized recommendation algorithms, and designed a predictive model for profile quality scoring.

TypeScript NodeJS Gemini API PostgreSQL Redis GCP

Full Stack Developer

October

Jul 2022 - Oct 2023 (1 year 3 months)

Following the acquisition of Credit.fr, contributed to the october.eu fintech platform (SME lending / crowdlending) within an international team of 20+ developers.

Lead Full Stack Developer

Neocredit.ch

Nov 2018 - Jun 2023 (4 years 7 months)

Built and developed the neocredit.ch fintech platform (investment and peer-to-peer lending) in an international environment

AWS Next.js React Terraform Docker MongoDB

Full Stack Developer

Credit.fr

Oct 2017 - Jun 2022 (4 years 8 months)

Developed and continuously improved the credit.fr fintech platform (peer-to-peer business lending)

Ruby on Rails MySQL AWS Redis

Full Stack Developer

Midrange

Jun 2014 - Oct 2017 (3 years 4 months)

Designed and developed extranets for the banking sector (CACEIS, EUROTITRISATION) and marketing websites. Set up GitLab to centralize projects and standardize team practices.

Symfony MySQL Vue.Js AngularJS

Full Stack Developer

Direct-Streams

Jul 2013 - Jun 2014 (11 months)

Enhanced a web product for the luxury hospitality industry, enabling the management and configuration of iPad and connected TV applications for hotel guests.

Ruby on Rails jQuery Bootstrap