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William DA SILVA
William DA SILVA
Full-Stack Developer

Team reinforcement

Full-Stack Freelance Developer — Vue.js, Node.js, TypeScript

Autonomous senior full-stack developer, I intervene to reinforce your product or technical team, on a fixed-price or long-term mission basis.

Your team needs competent and autonomous reinforcement

You're a CTO, lead developer or product manager. Your team is under pressure, a technical scope requires specific expertise, or you're looking to accelerate delivery without extending the recruitment process. A senior freelance developer can intervene quickly, without hiring delays, and bring operational competence from day one.

Who this service is for

Suitable if

  • You're a CTO or lead developer and need quick technical reinforcement
  • Your team is in transition and you need to maintain velocity
  • You have a specific technical scope (migration, redesign, deployment)
  • You're looking for an autonomous profile, capable of handling a module or service alone

Not suitable if

  • You're looking for a junior profile for simple execution
  • The need doesn't exceed a few days and can be covered internally

Expected results

  • An operational developer from day one, without a long integration period
  • Ability to handle complex technical scopes autonomously
  • A direct contact who communicates effectively with the existing team
  • Engagement flexibility, from fixed-price to long-term mission

Deliverables

  • Frontend and backend feature development
  • Code review and existing quality improvement
  • Technical migration, modernization or deployment
  • Technical documentation and team handover
  • Participation in agile ceremonies if relevant
  • Regular async communication and short meetings if needed

Scope examples

Short mission — development sprint

Targeted intervention on a defined scope: feature, fix or migration.

Long mission — team reinforcement

Integration into the product team for several weeks or months.

Technical mission — redesign or migration

Taking over a module, stack migration or progressive modernization.

Work method

After an exchange to understand the team, context and expectations, I integrate into your organization. Communication is mainly asynchronous, with short meetings when they genuinely help move forward. I adapt to the existing tools and processes of the team.

Pricing

Starting at €450 / day

Depending on duration and context

The rate depends on mission duration, technical complexity and integration context. Direct mission or via Malt.

Frequently asked questions

How do I contract a mission?

Two options: direct mission with service contract, or through the Malt platform for companies that prefer it.

Do you work on-site or remotely?

Mainly remotely, which allows me to work on projects throughout France. Occasional on-site visits are possible depending on context.

How long does it take to start?

Generally 1 to 2 weeks after scope validation and contracting.

Do you work with non-French-speaking teams?

Yes. I've worked with international teams. Technical communication is in French or English depending on your context.

Discuss a mission

Describe your need, team and context. I'll respond within a business day.

Contact me