Architecture & performance audit
- Typical duration
- 2 to 4 weeks
- You get
- Measurements from your system
- A written diagnosis
- A ranked roadmap with effort estimates
- A debrief with your team
- Best for
- A system that is slow, fragile or about to change.
Approach
How we work
Measurements before opinions, written decisions, and tests that describe what the business needs. The same arc applies to a two-week audit and to a two-year engagement.
The engagement arc
Diagnose
We map the flows, read the code and measure what matters: latency, throughput, error rates and cost. Opinions come after the numbers.
Design
We compare options against your constraints and write the decision down, trade-offs included, so it survives team changes.
Prove
The riskiest part is built first, as a prototype or a benchmark, so uncertainty is resolved early and cheaply.
Build
Production code with tests, CI/CD and monitoring. Benchmarks run in the pipeline, so a performance regression fails the build.
Hand over
Documentation, runbooks, pairing and internal talks. Your team owns the result.
Engagement models
Pick the format that fits the problem. Many clients start with an audit and continue with one of the other two.
Senior engineer or tech lead in your team
- Typical duration
- 3 months or more
- You get
- Hands-on delivery from the first week
- Technical leadership and code review
- Knowledge transfer throughout
- Best for
- A roadmap that needs senior capacity now.
Component delivery
- Typical duration
- Agreed per project
- You get
- A production-ready component
- Tests, CI/CD and monitoring
- Documentation and handover
- Best for
- A well-defined service such as a market data collector, a price broker or a data pipeline.
Principles
Measure first
No optimisation without a profile, and no architecture claim without a benchmark.
Write decisions down
Architecture decision records explain the reasoning, so the next engineer can challenge it with evidence.
Tests describe behaviour
TDD and BDD turn requirements into executable checks that protect the business while the code changes.
Senior from day one
Founder-led means the engineer in the first meeting is the one who writes the code.
Leave the team stronger
Pairing, reviews and internal talks are part of the job. Success is a team that no longer needs us.
Practicalities
Location
Paris and Île-de-France, on site or hybrid. Remote for clients elsewhere in France and in Europe.
Languages
French and English, in writing and in meetings.
Contracting
Directly with Quansight Consulting, or through your approved supplier panel.
Confidentiality
NDAs signed before any access to code or data. Case studies describe clients by sector unless they agree to be named.