Why test APIs separately from the UI?

API tests are faster and catch problems earlier, before they reach the interface.

Can you load-test our APIs?

Yes - we simulate real traffic and report where performance breaks down.

Which types of APIs do you test?

We test REST and GraphQL APIs, as well as gRPC, SOAP and webhooks, covering status codes, response schemas, error handling and data integrity rather than just checking that an endpoint responds.

Do you test API security as well?

Yes. We check authentication, authorisation between users and roles, input validation and exposure of sensitive data, using guidance such as the OWASP API Security Top 10 to shape our tests.

Can you set up contract testing between services?

Yes. We use consumer-driven contract testing with tools such as Pact, or schema checks against OpenAPI specifications, so teams catch breaking changes before services are deployed together.

How do you manage test data for API tests?

We create and clean up test data through the API itself or seeded fixtures, keep tests independent of each other, and mock third-party services so results stay repeatable.

Manual or automated testing?

Both. Automation covers repeat checks; manual testing covers new features and real-user behaviour.

Which automation tool do you use?

Selenium, Playwright, Appium and Cucumber, chosen for your stack.

Can you test an app we didn’t build?

Yes - we test any web, mobile or API product.

Can testing fit into our release pipeline?

Yes. We run tests in your CI/CD on every change.

Can you provide a dedicated QA team?

Yes - full-time or on-demand testers who join your sprints.

API Testing Services

Challenges & solutions

The quality problems we fix every week.

Pick the one that sounds like you. Here's how we solve it.

challenge

Solution

Bugs caught before release

Structured test plans and coverage of critical paths.

Test strategy
Critical-path coverage
Regression suites
Bug triage

How we build

Our unique process for QA & testing.

Fewer bugs, faster releases - a testing process built in five stages.

Step 1: Plan

Risks, scope and a test strategy for your product.

Step 2: Write tests

Manual cases and automation scripts for key journeys.

Step 3: Automate

Suites built with Selenium, Playwright, Appium or Cucumber.

Step 4: Run in CI

Tests on every build, across browsers and devices.

Step 5: Report & improve

Clear defect reports and growing coverage.

699+Ecommerce stores developed

+76%Avg. increase in store sales

Deep expertise

We have deep expertise in API testing.

APIs connect everything, so a broken one breaks a lot. We test responses, error handling and edge cases with Postman, REST Assured or Playwright, add contract tests between services, load-test with k6 or JMeter, and run it all in your CI pipeline.

REST & GraphQLPostman & REST AssuredContract testingLoad testing (k6, JMeter)Security checksCI integration

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Client testimonials

Trusted by thousands of happy customers.

Discover how our innovative solutions have transformed businesses, driving measurable success and lasting impact.

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01 / 05

Bytecode Technologies has developed a Shopify website for a motorcycle clothing company. The team is tasked with setting up the site's theme, creating custom code, and extracting code from another developer.

Kristen Staggs

CEO, Bohn Body Armor

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02 / 05

Bytecode Technologies continues to deliver features that boost the client's conversion rate and revenue. The team is highly proficient and agile from a workflow standpoint, and internal stakeholders praise the service provider's technical expertise and ability to take ownership of the project.

Patrik

CEO, Black Chili Messer

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03 / 05

Bytecode Technologies has delivered the website and code per the client's requirements. The team provides timely deliverables and has been responsive and communicative via email and messaging apps. Their knowledge of Shopify is impressive. They've fixed every issue that the client has presented.

Dustin Chaffin

CEO, Greatvacs

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04 / 05

“We have had an exceptional experience working with Bytecode Technologies. Their team of web developers is highly skilled and dedicated, delivering top-notch solutions that exceeded our expectations. They are responsive, professional, and truly understand the needs of their clients. Our project was completed on time and within budget, with excellent attention to detail and functionality. We highly recommend Bytecode Technologies for any web development needs. Thank you for your outstanding service!”

Zane Sabre

Founder of MSD , MAISONdeSABRÉ

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05 / 05

“Exceptional service and unmatched professionalism. From start to finish, every detail was handled with the utmost care, making the entire experience smooth and stress-free. The team’s expertise is evident in every interaction, and their dedication to delivering top-notch results truly sets them apart. I am thoroughly impressed and couldn’t be happier with the outcome. I highly recommend their services to anyone seeking excellence.”

Yassine Harraj

Head of Direct e-commerce , DELSEY PARIS

Why Bytecode

Why choose Bytecode?

Crafting exceptional experiences is at the core of what we do. Our team combines creativity, research and industry-leading practices to build products that are intuitive, engaging and results-driven.

Human-centered design

We prioritize your users at every stage of the process.

Innovative solutions

Modern, creative work tailored to your industry and goals.

Collaborative approach

We work closely with you to align every build with your vision.

End-to-end expertise

From idea to launch and beyond, one team covers it all.

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Let's connect

Start growing your business with us.

Get in touch with our team to discover how we can help you achieve your goals with tailored solutions and expert support. Let's take your business to the next level, together.

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