You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Romain MasclefRM

Romain Masclef

Golang Engineer | Solution Architect | Tech Lead

EUR 750/Tag
Paris, FR
8-15 Jahre

Durchschnittliche Reaktionszeit: 1h

Über Romain

Your delivery is slowing down. Your architecture is struggling under load. Your engineering team lacks direction. I step in.


I help startups in scaling phases regain control of their technical platform. Fast, concrete, no bullshit.


What I bring:

→ Technical vision aligned with your business objectives
→ Precise diagnosis within days (org, architecture, delivery)
→ Hands-on execution when needed
→ Real uplift for your engineering teams


Stack:

- archi: Microservices · Event-driven architecture · DDD · Clean architecture/Hexagonal architecture · RestAPI · GraphQL ·

- backend: Go · Node.js/TypeScript/NestJS · PHP/Symgony

- infra: AWS · Kubernetes · Terraform

- db: PostgreSQL · MySQL · Mongo · Opensearch/Elasticsearch · Redis · S3 · Kafka

- crm: Salesforce · inhouse solutions

- observability: Datadog · CloudWatch · ELK Stack · Grafana stack · Splunk

Typical engagements:

- Flash technical & organizational audit
- Critical platform stabilization
- Engineering team structuring & upskilling
- Staff/Tech Lead embedded in your team
- Fractional / interim CTO

14 years of experience:
- TF1 (millions of users)
- Reezocar (5 years: Lead Backend → Solution Architect → EM 20+ engineers)
- Freelance CTO @ Trevee Finance

📩 Got a project? Reach out directly.
  • Französisch

    Muttersprachlich oder zweisprachig

  • Englisch

    Verhandlungssicher

Nur remote
Führt Projekte hauptsächlich remote aus

Projekt- und Berufserfahrung

  • Trevee Finance
    CTO
    HIGHTECH
    Juni 2025 - Dezember 2025 (6 Monate)
    Paris, Frankreich
    Lead all technical strategy, architecture and engineering efforts.

    My role covers both high-level product vision and hands-on implementation across backend, crypto/Web3 integrations, infrastructure and internal tooling.

    Key responsibilities:

    - Technical leadership & architecture:
    Design and maintain Trevee’s global technical architecture, ensuring security, scalability, and reliability across all systems (APIs, indexers, data pipelines, frontends, blockchain integrations).

    - Web3 & Smart Contract integrations
    Oversee all integrations with EVM chains (Sonic, Ethereum, Plasma…), RPC providers, indexers (Alchemy subgraphs, Ormilabs, Tenderly…), and blockchain data infrastructure.

    Define best practices around events handling, TVL/APR computation, and on-chain/off-chain interactions.

    - Product & platform engineering
    Supervise the development of Trevee’s core products (dashboards, APIs, data services, earning strategies systems), and ensure fast iteration cycles with strong engineering practices.

    - Cloud & DevOps ownership
    Manage infrastructure (VPS, Docker, CI/CD, monitoring, alerting, security hardening) and guarantee service reliability and cost optimisation.

    - Team enablement & tech processes
    Define standards, code quality rules, development workflows, and contribute to building a strong engineering culture.

    - Strategic involvement
    Collaborate closely with founders on product vision, roadmap prioritisation, and long-term technological positioning.

    - Stack & Domains
    Go, Node/NestJS, OVH, Docker, PostgreSQL, Nginx, Traefik, Alchemy, Ormilbas, OctavAPI, SevenseasAPI, Grafana, Loki, Tenderly, Web3/EVM, RPCs, Smart contracts, Indexers, Observability.
    Web3 Crypto Blockchain DeFi ETL
  • Reezocar
    Engineering Manager
    AUTOMOBILSEKTOR
    März 2023 - März 2025 (2 Jahre)
    Paris, Frankreich
    - Led and scaled cross-functional product & engineering teams (up to 20+
    engineers) to support business growth and strategic pivots.
    - Designed and implemented team structures, delivery processes, and rituals to
    support agility, ownership, and accountability.
    - Actively contributed to system design, code reviews, and architecture decisions
    to ensure alignment between tech and product vision.
    Partnered closely with Product, Design, and Business to co-define roadmaps and
    translate strategy into execution.
    - Drove continuous improvement initiatives in velocity, quality, and team
    autonomy.
    - Took part in company-wide org design efforts, helping shape a scalable,
    collaborative, and outcome-driven tech organization.
    - Acted as a cultural leader and change agent during phases of transformation,
    uncertainty, and reorganization.
    - Balanced operational delivery with strategic input at the leadership level.

    Engineering Management · Amazon Web Services (AWS) · Amélioration continue · Clean Architecture · Domain Driven Design · Event Driven Architecture · Extraire, transformer, charger(ETL) · Git · GitHub · Github Actions · Go · GraphQL · Intégration continue · Méthodes agiles · Leadership · Docker Products · Disponibilité continue · Deploiement continue · Jenkins · Kubernetes · MySQL · Revue de code · Scrum · SoapUI · Terraform

    Amazon Web Services GO Terraform Elasticsearch scrapping
  • Reezocar
    Solution Architect
    AUTOMOBILSEKTOR
    Januar 2022 - April 2023 (1 Jahr und 3 Monate)
    Paris, Frankreich
    - Led the strategic cloud migration from Azure to AWS, prioritizing security,
    scalability, and cost-efficiency; achieved 95% infrastructure coverage via
    Terraform (Infra-as-Code) while aligning with the AWS Well-Architected
    Framework.
    - Successfully delivered the migration of the internal CRM to Salesforce,
    improving sales workflow efficiency and reporting capabilities.
    - Replaced Aircall with AWS Connect, launching a scalable, customizable call
    center solution, reducing telephony costs by 40%.
    - Actively supported the creation of a new product team, driving the definition of
    its scope, delivery process, and its alignment with tech strategy.
    - Scaled up Data Engineering, Infrastructure, and Backend teams by +60%,
    improving autonomy and delivery throughput.
    - Mentored engineers and product managers across disciplines: Backend, Infra,
    Data Engineering, Data Science, and Product, supporting career development
    and cross-functional alignment.
    - Designed and implemented ETL pipelines with the Data Engineering team and
    exposed business KPIs through Tableau dashboards, enabling real-time
    data-driven decision-making.
    - Worked closely with product and leadership teams to ship fast, reliable solutions with measurable business impact.
    - Conducted security audits and enforced compliance policies in line with Société
    Générale's acquisition requirements, ensuring regulatory alignment.
    - Reduced overall tech spend by identifying infrastructure optimizations and
    rationalizing tool usage across teams.

    AWS · Amélioration continue · Architecture · Clean Architecture · Datadog · CI/CD · Disponibilité continue · Docker · Domain Driven Design · Event Driven Architecture · Engineering Management · Extraire, transformer, charger(ETL) · Git · GitHub · Github Actions · Golang · Go · GraphQL · Helm · Intégration continue · Jenkins · Kafka · Kanban · Kubernetes · Leadership · Scrapping · Revue de code · Restful API · Software Design · Software Infrastructure · Terraform · Terraform Cloud
    GO Amazon Web Services ETL Terraform Clean Architeture

Empfehlungen

Sei die erste Person, die Romain empfiehlt

Teile Deine Erfahrung aus der Zusammenarbeit mit diesem Freelancer.

Diese Freelancer passen auch zu Ihren Kriterien

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Ausbildung und Abschlüsse

  • Expert en Ingénierie Informatique
    Efficom
    2014
    BAC+5 en alternance chez Auchan e-commerce France
  • Licence Professionnelle
    Institut des Sciences et Techniques de Valenciennes (ISTV)
    2012
    Spécialité développement JAVA

Fähigkeiten

Kategorien