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I'm Sven Smit, a senior software engineer with a decade of experience building and maintaining production platforms across property-tech, healthcare, and digital services. I focus on PHP, JavaScript, and MySQL, balancing stability of legacy systems with modern practices, refining subscription and account workflows, and reducing friction for non-technical stakeholders. I enjoy owning the full lifecycle of web applications, collaborating across time zones, translating vague requests into concrete specs, and mentoring teammates. I thrive in independent work, careful iteration, and clear documentation to help product teams move faster.…I'm Sven Smit, a senior software engineer with a decade of experience building and maintaining production platforms across property-tech, healthcare, and digital services. I focus on PHP, JavaScript, and MySQL, balancing stability of legacy systems with modern practices, refining subscription and account workflows, and reducing friction for non-technical stakeholders. I enjoy owning the full lifecycle of web applications, collaborating across time zones, translating vague requests into concrete specs, and mentoring teammates. I thrive in independent work, careful iteration, and clear documentation to help product teams move faster.

Sven Smit

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm Sven Smit, a senior software engineer with a decade of experience building and maintaining production platforms across property-tech, healthcare, and digital services. I focus on PHP, JavaScript, and MySQL, balancing stability of legacy systems with modern practices, refining subscription and account workflows, and reducing friction for non-technical stakeholders. I enjoy owning the full lifecycle of web applications, collaborating across time zones, translating vague requests into concrete specs, and mentoring teammates. I thrive in independent work, careful iteration, and clear documentation to help product teams move faster.…I'm Sven Smit, a senior software engineer with a decade of experience building and maintaining production platforms across property-tech, healthcare, and digital services. I focus on PHP, JavaScript, and MySQL, balancing stability of legacy systems with modern practices, refining subscription and account workflows, and reducing friction for non-technical stakeholders. I enjoy owning the full lifecycle of web applications, collaborating across time zones, translating vague requests into concrete specs, and mentoring teammates. I thrive in independent work, careful iteration, and clear documentation to help product teams move faster.

Available to hire

I’m Sven Smit, a senior software engineer with a decade of experience building and maintaining production platforms across property-tech, healthcare, and digital services. I focus on PHP, JavaScript, and MySQL, balancing stability of legacy systems with modern practices, refining subscription and account workflows, and reducing friction for non-technical stakeholders.

I enjoy owning the full lifecycle of web applications, collaborating across time zones, translating vague requests into concrete specs, and mentoring teammates. I thrive in independent work, careful iteration, and clear documentation to help product teams move faster.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Brainhub

August 1, 2022 - Present

Led the maintenance and gradual modernization of a legacy PHP-based membership platform, improving account management flows and reducing recurring support tickets related to subscription renewals and access expiry. Replaced brittle custom forum integration with a more maintainable approach, isolating authentication and permission logic so community features could be updated without destabilizing the rest of the site. Designed and deployed a set of RESTful endpoints to decouple the frontend from direct database queries, making it safer to iterate on UI without risking data integrity. Worked with brand manager/editor to translate feature requests into technical specs, implementing them incrementally with minimal disruption. Introduced structured logging and error reporting, cutting production debugging time by about half and giving non-technical teams visibility into recurring issues. Overhauled session/auth layer to fix intermittent login failures; migrated site from shared hosting to c

Senior Software Engineer at Fresenius Medical Care

August 1, 2021 - July 1, 2022

Built and maintained internal web applications supporting clinical scheduling and patient data workflows in a regulated environment; refactored legacy PHP reporting module into smaller services with database-level validation; developed reusable authentication/authorization components used across internal tools; collaborated with product managers and compliance officers to clarify requirements around user permissions and data retention, then implemented rules transparently for auditors; wrote internal documentation to reduce onboarding time and post-incident support.

Full Stack Engineer at LIMA

January 1, 2018 - June 1, 2021

Developed client-facing web portals and internal dashboards using PHP, JavaScript, and MySQL; built a subscription-based service management platform where clients could track support tickets, view billing history, and manage their account details — including automated renewal reminders and payment retry logic. Integrated third-party APIs for payment processing and email delivery, handling webhook failures and idempotency. Improved database query performance on several high-traffic reporting pages by adding proper indexing and restructuring queries, reducing page load times from several seconds to under half a second. Provided technical support and ad-hoc fixes for production issues, often working directly with client stakeholders to understand the problem and deploy a fix the same day.

Software Engineer at Rightmove PLC

September 1, 2016 - December 1, 2017

Contributed to the UK’s largest property portal, focusing on the search and listing backend that served millions of daily users, with a focus on query performance and result accuracy. Built internal tools used by account managers and customer support teams to manage subscriptions and property listings; coordinated a migration of legacy PHP search endpoints to a service-oriented architecture, ensuring listing freshness and consistent behavior during the transition. Wrote integration tests for critical search and account management flows, catching regressions before they reached production and reducing the need for manual QA cycles.

Junior Software Engineer at Casino Kings

October 1, 2014 - August 1, 2016

Developed and maintained the user account and payment systems for a UK-licensed online gaming platform, handling registration, deposits, withdrawals, and bonus credit logic. Built automated reconciliation scripts in PHP that matched internal transaction records against payment provider statements, surfacing discrepancies that had previously required manual investigation. Maintained the customer-facing website and backend services, fixing bugs related to session handling and game lobby data that affected user experience during peak hours. Wrote internal documentation for the account management and payment systems, which became the reference used by the support team to diagnose common user issues.