Senior developer - Lead engineer - Software architect

Unblock a critical technical subject. Ship it cleanly.

A module to ship, an AI integration, an architecture bottleneck or a performance issue that has become visible to users. I work either as a short Product Sprint or a longer hands-on mission.

In your repo

Code, tests, PR, architecture notes and decisions stay in your tools.

Clear scope

A 30-minute scoping call validates the expected deliverable.

Hands-on

Architecture and implementation move together, not in separate silos.

Handover included

Demo, explanation and team takeover are planned from the start.

What the engagement covers.

Useful delivery is not only code. It also clarifies the need, chooses the architecture, integrates with the existing system, tests, deploys and transfers knowledge.

Scope

need, criteria

Architecture

justified choices

Code

maintainable implementation

Delivery

tests, deploy, handover

Product SprintShort fixed-scope delivery

10 days to ship a first usable deliverable.

Useful for starting a feature, validating an AI integration or unblocking a module without launching a long engagement.

Fixed-scope sprint

Product Sprint - 10 days

One module, feature or AI integration delivered in usable form.

Who it helps

CTO, founder or product lead with a clear need that is too important to stay in the ticket backlog.

What you get

A concrete deliverable running in staging or production.
Code in your repository: PR merged, tests and architecture note included.
A real base for iteration, not a prototype that must be rebuilt.
Monitoring connected when the scope reaches production.
Oral handover to your team.

Format

10 full days, spread over up to 3 weeks. Scope negotiated during scoping.

Pricing

EUR 4,500 ex. VAT - payable in two steps. Negotiable depending on scope.

Start

Can start this week.

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Long missionDay rate - 3 to 12 months

Need a hands-on technical lead over time?

I work across scoping, architecture, implementation, production and team enablement. A permanent role can also be discussed.

Full Product Build - from zero to production

A hands-on senior profile to build, stabilize and transfer.

Who it helps

Founder or CTO who needs someone able to decide, build and document without multiplying intermediaries.

What you get

A product in production, not only a POC.
Documented architecture, tests and CI/CD in place.
Decision records so the team understands why it is built that way.
Team handover included, without dependency on my presence after delivery.

Format

3 to 12 months - permanent Senior C#/.NET/GenAI role or full-time freelance mission.

Pricing

Day rate EUR 450-650 ex. VAT depending on scope. Permanent role open to discussion.

Start

Within one week after product scoping.

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Native GenAI integration in .NET

LLM, RAG, agents or scoring integrated cleanly in your .NET product.

Who it helps

.NET teams that want LLM, RAG, agents or ML while keeping a maintainable stack.

What you get

Production integration in a few weeks.
One maintainable .NET stack.
Evaluation pipeline to catch regressions before users do.
Skill transfer to your .NET team.

Format

2 to 8 weeks for a POC/integration, 3 to 9 months for a full build.

Pricing

Day rate EUR 450-650 ex. VAT. Two-week POC packages from EUR 5,500.

Start

Within 5 days after scoping.

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Architecture audit and optimization

Find the real bottleneck, fix the first causes, leave measurable ground.

Who it helps

CTO or product team whose system is slowing down, scaling poorly or consuming too much infrastructure.

What you get

Fixes implemented in your repo, not only documented.
Before/after baselines that can be verified.
Prioritized optimization backlog for your team.
Anti-pattern documentation to train the team that continues.

Format

1 to 4 weeks - fixed price or day rate depending on scope.

Pricing

Day rate EUR 450-650 ex. VAT. One-week diagnosis plus fixes from EUR 3,500.

Start

Within 3 days after scoping.

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Real-time performance and high-load compute

Latency, throughput and memory when the technical constraint becomes visible in the product.

Who it helps

Simulation, gaming, trading, high-frequency IoT - systems where latency and throughput define the product.

What you get

Measured gains with before/after benchmarks.
Architecture stable under sustained load.
Skill transfer to your team.

Format

2 to 8 weeks - fixed price or day rate depending on deliverable.

Pricing

Day rate EUR 450-650 ex. VAT. Two-week POC from EUR 5,500.

Start

Within 5 days.

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IoT, embedded firmware and cloud telemetry

Firmware, cloud telemetry and dashboard: an operable chain end to end.

Who it helps

Industrial companies, hardware manufacturers and teams shipping connected devices at scale.

What you get

Fleet scaling that stays predictable.
Controlled cloud cost.
Remote diagnosis for devices in the field.

Format

3 to 9 months - full-time freelance or recurring consulting.

Pricing

Day rate EUR 450-650 ex. VAT. Fixed price possible for firmware/cloud POCs.

Start

Within 1 to 2 weeks depending on hardware and production access.

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First call - 30 minutes

Have a risky technical topic?

.NET architecture, GenAI, backend, TypeScript frontend, IoT or performance - I will quickly tell you whether I am the right fit.

Describe the need

Un instant...

Unblock a critical technical subject. Ship it cleanly.

A module to ship, an AI integration, an architecture bottleneck or a performance issue that has become visible to users. I work either as a short Product Sprint or a longer hands-on mission.

In your repo

Code, tests, PR, architecture notes and decisions stay in your tools.

Clear scope

A 30-minute scoping call validates the expected deliverable.

Hands-on

Architecture and implementation move together, not in separate silos.

Handover included

Demo, explanation and team takeover are planned from the start.

10 days to ship a first usable deliverable.

Useful for starting a feature, validating an AI integration or unblocking a module without launching a long engagement.

Fixed-scope sprint

Product Sprint - 10 days

One module, feature or AI integration delivered in usable form.

Who it helps

CTO, founder or product lead with a clear need that is too important to stay in the ticket backlog.

What you get

A concrete deliverable running in staging or production.
Code in your repository: PR merged, tests and architecture note included.
A real base for iteration, not a prototype that must be rebuilt.
Monitoring connected when the scope reaches production.
Oral handover to your team.

Format

Fleet scaling that stays predictable.
Controlled cloud cost.
Remote diagnosis for devices in the field.

Format

3 to 9 months - full-time freelance or recurring consulting.

Pricing

Day rate EUR 450-650 ex. VAT. Fixed price possible for firmware/cloud POCs.

Start

Within 1 to 2 weeks depending on hardware and production access.

Discuss this topic Detailed sheet