--- title: "Quality Assurance & Performance Optimization" date: 2026-03-04T11:43:00+01:00 author: Santiago Melluso canonical_url: "https://www.takefortytwo.com/en/services/quality-assurance-performance-optimization/" section: Services --- [Services](https://www.takefortytwo.com/en/services/)[Back to listing](https://www.takefortytwo.com/en/services/)Development # Quality Assurance & Performance Optimization QA is not the last step. It’s built into every phase of our process. We test across devices, browsers, user journeys, and edge cases — before your customers find the problems. Beyond bug-free, we obsess over performance. Page speed, Core Web Vitals, image optimization, code efficiency — because a slow site loses sales, and a fast site compounds them. **This is for you if:** - You’ve launched projects before that had embarrassing bugs in the first week. - Your site’s performance scores are hurting your SEO and your conversion rate. - You’re about to launch something significant and want independent QA before it goes live. **What you’ll get from this:** - A comprehensive QA process covering functionality, responsiveness, browser compatibility, and user flows. - Core Web Vitals audit with specific, actionable optimizations. - Performance benchmarking before and after, so the improvement is measurable. - A post-launch monitoring plan so nothing breaks quietly after you ship. [Get in touch](https://www.takefortytwo.com/en/contact/) ## Frequently Asked Questions We already run QA internally before launch. Why bring in an outside team?An outside team catches what internal QA misses, because familiarity creates blind spots: your team tests what it already expects to break. We test across devices, browsers, user journeys, and edge cases, and benchmark performance before and after so the improvement is measurable. Pairs well with a full [Ecommerce Audit](https://www.takefortytwo.com/en/services/ecommerce-audit/) if you want the technical picture beyond just QA. How long does a QA and performance engagement take?A pre-launch QA pass on a single site typically runs one to two weeks from kickoff. An ongoing performance program extends over a full sprint cycle or more, covering functionality, responsiveness, browser compatibility, user flows, and a Core Web Vitals audit with specific, actionable optimizations. Both include before-and-after benchmarking, so the improvement is measurable rather than anecdotal. Our Core Web Vitals scores are poor. Will fixing them actually move conversion rate?Fixing poor Core Web Vitals removes friction that was quietly costing you sales, though it won’t rewrite your value proposition on its own. We benchmark performance before and after the optimizations, so you see whether speed actually moved conversion instead of taking it on faith. Pair this with [Conversion Rate Optimization](https://www.takefortytwo.com/en/services/conversion-rate-optimization/) to work speed and funnel at once. Couldn't we just hire a freelance QA tester for this?A freelance tester can execute a test script competently, and for a narrow scope that may be enough. What’s harder to get from a single contractor is QA and performance engineering working from the same findings: functionality, browser compatibility, and user flows read together with a Core Web Vitals audit. Bugs and speed problems often share causes, so treating them separately means fixing symptoms. What happens if you find a critical bug right before we're set to launch?We flag it immediately with its severity, rather than batching findings into a report you only see after go-live. Together we decide whether it blocks the launch, ships with a workaround, or waits for a fast follow, based on real user impact. The point is that your customers never find the problem before you do. Is this priced as a one-off project or an ongoing retainer?Both models exist: a pre-launch QA pass is typically a fixed-scope, one-off project, while ongoing work fits a retainer better. The project version covers testing, the Core Web Vitals audit, and before-and-after benchmarking; continuous monitoring and optimization sit naturally inside [Monthly Sprint Planning & Execution](https://www.takefortytwo.com/en/services/monthly-sprint-planning-execution/). Which one you need depends on how often your site changes. ## You might also like #### Analytics & Performance Review Data don't lie, but they require interpretation. We help you understand what your numbers are actually telling you, and what to do next. [ Read More ](https://www.takefortytwo.com/en/services/analytics-performance-review/) #### Conversion Rate Optimization CRO is not a tactic. It's a mindset. Ideate, test, measure, iterate — on repeat, until every visit works harder for your business. [ Read More ](https://www.takefortytwo.com/en/services/conversion-rate-optimization/) ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAAAjCAIAAACra5t9AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAKiUlEQVRYhW1YzXI0uXHMLGC432pXK4UOCkf46tfy3We/sR9Acnh/yGlUVaYPQA+plToQzSGJ7qmsn6ws8L//6z9td6my1nM936/nz+/vf//tt//5+f3Xv3/gbw1M4HvgJ/z403/825/+/S9/+uuff/rLT3/8848//unHH378ww8/fv/t+2/fvn97e3vMx5xzMEjAtqSuyqxcua51Pa/nx3V9PJ/ve13Xx3N9rHxmXVXZakkAaBBBkgiaBAHCgOGzbMMAAgAAAoBxtgEECcKB/eznBgDncQD2/gWfb9w/v3zN/eP3v+wX+n7JNu/+gi+fz/f6/vtrNwzbkxYMQoRj3+mgYzrgARgIIHD2ADp2SLYsWdJ9V4s8eHcE/tVl7cf3G2xbsADDuo0mAH96zxusvrh/e2EGZNhQQAENKqgRmg9NdAMAxgFQQMOy22qp1fe9q3uMit6WB0FYllTV/Vr3pX0/aPpG0oBOBpC2QcIEuCNyIN6IbRiegTZs9EA3O9CTPaPnWz9QOqZvDEk01FBL5S51dVVXdo3KCAKQpVcNtNTVmZWZWVlZr6urukpdUkllFdT+EgGCdux62NbLECxbhvyKgNMG3HYP1GRV1Bz9eHQhDRRAYB4kaZdV3i6t7FxVo1ZEgJQ9NYIRJ4Va1V1ZuTJXrrVyZa2s3FCyK7vLnXbZdUr0djxImwZlbgBt3/cdCszhNEDIKKE2hhk1H/n2U+JnBOAdgQCwoKVeqqVcnbNy1IoMkIIf7uoxyJNCLXUpa7NQrmut61rryrUqV+XqWqolLSvhhsWd7iQQMMGwaUNAGy20XULrBhBI27AGWliT2VGPkf1I/QD/vCsIA4hvID+g5V5dq/OqNerBHAgaaKt6zhhB7mTCHYHOzLU2gLWua11XrusA6Eu9rLQK7l26RPhmwRMEsY2SS6h26URjhhdsWnALKebgmpFzLn0H/xH8BbsS4g3Eh/10fVM9Kkdl5MIIk7LLPWOOiCBjE2q3upW5W0Gta+W11nXCUfnsvFSX+7IWnEATOizkMMMOOGRKbKEa2ch2NkpuYw5dBmAZPZB3ENacl96gH4CEnuAD8QAB6F39TTU7Ry3WcFJAWw/VHHMwAjsCwp1CpwzWyrxWrlXXVevqvFRP9QU9oQ/gSSRfzA/SAxhW2KGOblYjC1d5NbJdwqQXvdmpwxVYwTVizUg9oG/AH9FvQCAmAFi/ur91zs6oCxkiGy5r9pxjDMamDsjYEajqzM7MXFVr5Vq9Vq+n8lI90e/wb8R1OP/umoCNgsuGtckPlcjCSjwTVyE3gJ1CPAAykIMrBmJgPODvTjPhBAnI6l9Vs5M9XUPBhlN6jDHi9wB8AFTXqtzJtJby6rzcT+gd/oXul/Xk3cd2G/PpbxK60IVcuBY+LnwsPAuTWjA2ALroDCRZQWwM8TgdnHHc4v5QPzpZwxEiyn64p+ZkbA6lwN1qq1Wlqq6squzMztW13E/0O/QLbb6Y/wZAQAR1VIUFN9ToRC6sJz7e8fNv+L+FCR32pRobA5poEhsDx2kkDICwIUH9a3d0oVJkA2VN9eAYJI0wILnlblf36XiVnalO92V9wL8ewidi328A3r7flwDBggsq9EK+4/m/+DsgYEJtY/d9SLfaI3FnToBxGovv3FRL/eyOKESYENzWYAcjDNqQ0bsV9BYUpS4rrWVfwAepkzZfrOerFX9JoSODGkr0hfoZTxy2mmoA1oYoWLQCHnZ9yqrtFYI8AGV8UUHB3fghelA0ee/xVnhW222XUUCRBRaBIOLLnXf2w59g+ApCwwU/0Y1145wWbdpSUwoppCFNu6x+4ccttT+Xhw9DQwYFEIQZtzh+aedjkcnTYQGSg664pW68QnF/Hf0pSo+UE1DAx0mrA6B7wJap3murQ22lecLi80AAPjDejO+Mh/EwpjH2urUfAHr30AANhAnTI2Bzvv5J1yf/4M6Zf5TUnwAaKCCPQL4B1DC2sI/u7oba6ql+k9S9Tml8iYDwnfHN/M58Mx/mwxx7MeitRQFiGy1CsSsJ9F22NOlBZ6ACRXgn/bl+N8/sEAps7BDOF4CqAUC2Wt2oQpX7iOWHWt0lwXdoiW/Bl/Vv4EQ8wM24gdj1wF3wpGgHGxQYIN1hBiKooCc96SZEi/TNEncjM+7SbEg7CAEM4O33AGSJLwBVqhqds7K7JMsBRtBvxjHdfHM8HA9wOuYLwF2MAEw7LHGQTUaQZmyDwaCaHnTvORF+uZ1nLD2j6s6BhotVRO8IfAdcwMyKPVzu5KlyZdSKWqPW6BzdU2gMcEz6ETvvOcEJbusfiOHT9u5h/HhSkMkmGaQ+R8Rb8Ws7VGdkxD234zSce4LeLN/oIipQE/09fAEzcwNQd6hdqUrWYl2sxVqhDgXwQMxJT+2S5TSnORwTHOAE7whsSj9TuBCC7h67ZwsCYfQu9P7SYnbO8PTKzdd7cpEguQMVwAjMgXpD/wGeuWjbptpd6Lqtv1hP9kU1PUkQj6DDDmMYYYa5P4x7hREvAt/DlcE91poGhmkjgNhepr03wT5nBobEzRytnduWKNFN1GlMAQ6MN2iuo6Z3fNCJulxP9Lvrid6M2+AkmjQFCmfMM2iE7grV/Wqb4FYDkvcey7KpzZ8iTAgQIfB89ib73VVbkG4wDTXd9DkHMoHYoc9rD2RSW+W+VE/Xr+re8ukkZFzm94hbbWgfcvgOtKGb7OzD38ett5bUqxQPr5wxkXeucJ+tbKwNNau3nkXv7pSnm929lUTM9aFdJC716v5Qf6ihOt/Yhgi5yJbuvT5j9T4VMaUWLRrm3UX92ra9c45j7HsdD7fg7eeNGG5KUKEL1Tgwyr3Uxxt+rbl+LRhua0kf3ejzCEooo4wiPABlqL+cYb2u7g5CdEM2RZCbFL13t6TWlnXdvhfU7IaKFiRan8JT6KYaVXsMcCf6UsN9lLUbKmCuv+VdcBL6Nj0baaSRODRRkbTKmlJJQ917zEPQAcPhOPMkd3EeMdfH+upu18GwPUwVVHRxu/1IRbi50XWxErUrEyh4r4QX/IRnInE/J0ioRglLWEb6lAsMqMqd6iGFeuzGx97yR7bo4G63ZyKz5OP9fRRXpW53etOFkkpq0StcOwVfE8zO40pUIZP1RIF1q6EFvwMLmInn1wgYJaSQQvlWVEfhtt3LCndIVKMbbIMyBj2oOHphn0OdgUZ96251aU8FnewFrdCTvsJHAx45JMBnCO467s/a7t/WY1sPYBY+XhEwSuht+j+rKQBuWUs73Rtsd8lQYFCDEd7jmLFLtO+R8sw0WTuMrkVd1Eeot5beOvaokB2Ee4ashXoex2/rn8D7pxrFLwZw0+CLpH7v/r0Eq46yarOFkNnGQIw9vAmU0WLLtbVJKUuV1dWd6UrUk/1BeQADGDwr+InBm4gStdD5KaXXF+s3AOGrif/ycP517fNjlwXtWaYFTvsAMCnHPgOsRrWznKlMZXat6lxeF+rJ8hAGMAMzMAcUGOOLFLyZVOtY/8JwfQWgL1b6n9z/9bqHrO2ec1zjfV68+Y9xIiLWPkWrA2AfBdWqulLX4uVIDOOxD74fwAQmIDgQvAHcx0HC56p/tOr/ASE8TI74c5RxAAAAAElFTkSuQmCC)![Warm golden sepia illustration of a cowboy figure in a dusty Western scene](https://takefortytwo-new.transforms.svdcdn.com/production/media/blog/compliance-accesibility-performance-alt.webp?w=1648&h=898&auto=compress%2Cformat&fit=crop&dm=1774785495&s=3bf52d41ba2932e4b9ab4a82fd4ebcfa) #### Compliance, Accessibility, Performance The new normal is that everything sucks. Focus on Compliance, Accessibility and Performance and make your future self’s life easier. [ Read More ](https://www.takefortytwo.com/en/blog/compliance-accessibility-performance/) #### Blueprint Strategy, performance, marketing, tech stack. Four potential blind spots. Blueprint surfaces what's working, what isn't, and exactly what to do about it. Take one and call us in the morning. [ Read More ](https://www.takefortytwo.com/en/solutions/blueprint/)