Pierre-Alexandre K.

Senior Lead Tech / Web & Data Software Architect with 12+ years of experience, including 8 years leading the tech for a startup under strong constraints. I support product teams in designing, scaling, and ensuring the reliability of data-driven SaaS platforms, particularly on complex and demanding topics (technical scoping, debt vs. time-to-market trade-offs, mentoring, delivering robust solutions in production, big data, geospatial, performance, etc.).

I have led 6 SaaS products (B2B, B2B2C, B2G) from idea to production, used nationwide.

I step in when:

- a product needs to reach a technical milestone

- a team needs a solid point of reference to structure and deliver

- an architecture becomes a bottleneck (scalability, debt, performance)

- a project needs to be taken over, clarified, and secured quickly

I can act as Lead Tech, Lead Developer, or outsourced CTO, working closely with teams and business objectives.

Technical Leadership

Scoping, roadmap management, technical trade-offs, team structuring, implementation of quality standards and pragmatic agile methodologies.

Ruby on Rails / Web

Full mastery of Rails (front, back, APIs), integration of AI tools, design of business tools, Postgres / PostGIS optimization.

Back-end & Data

Scalable architectures, complex databases, geospatial processing, ingestion and aggregation pipelines, applied AI.

Quality & CI/CD

Automated testing, CI/CD, deployment reliability, and QA cost control.

Cloud & Infra

Secure and performant deployments (AWS, Heroku, Scalingo, OVH).

I help you clarify challenges, establish a sustainable architecture, and accelerate delivery without sacrificing quality.

Direct approach, reasoned decisions, simple communication, and trust-based relationships.

Available for Lead Tech, Lead Developer, or outsourced CTO missions.