4 weeks
Freelance – Technical Lead – Node.js/React.js and Dataverse
About this role
About Gapstars At Gapstars, we partner with some of Europe’s most ambitious companies, from disruptive tech startups to established Benelux accounting firms, helping them build high-performing teams in engineering and finance. Headquartered in the Netherlands, with talent hubs in Sri Lanka and Portugal, we are home to 300+ professionals who thrive on solving real-world challenges with modern
Role information
At Gapstars, we partner with some of Europe’s most ambitious companies, from disruptive tech startups to established Benelux accounting firms, helping them build high-performing teams in engineering and finance.
Headquartered in the Netherlands, with talent hubs in Sri Lanka and Portugal, we are home to 300+ professionals who thrive on solving real-world challenges with modern solutions. Our teams work across domains, from networking, marketplaces, SaaS, and AI to embedded finance and accounting, delivering scalable solutions that drive meaningful outcomes.
The RoleOur client is looking for a mid-senior level backend-leaning developer to help build out and extend their internal value creation platform. The work centers on backend logic, data architecture, and integrations – with simple, functional React frontends. This starts as a part-time engagement and is expected to ramp to full-time as the working rhythm is established, with strong potential to become a long-term, ongoing engagement (multiple dashboards, agent workflows, and platform features planned).
About the platformThe platform is a value creation portal that enables investment teams and portfolio-company management to manage value creation activities, including company profiles, valuations, fund reporting, transformation initiatives, stage-gate governance, KPI planning, questionnaires, playbooks, and task boards.
The platform is built entirely in TypeScript, with a React SPA on the frontend and an Express API on the backend. It uses Microsoft Dataverse as the primary datastore, SharePoint for document management, and Power BI for KPI data and reporting.
This is a 3-4 month engagement, starting part-time with the potential to transition into a full-time role based on project needs and mutual fit.
What you'll do
Build and extend backend logic, APIs, and data models in Microsoft Dataverse Knowledge of full-stack TypeScript: Express services on the backend, React on the front end
Extend the existing React SPA, dashboards, forms, tables, and reporting views on top of the current component library
Work across the Microsoft stack: Entra ID authentication and token flows, Microsoft Graph, SharePoint document libraries, and the Power BI to Dataverse KPI sync
Manage Dataverse schema changes in the Power Platform Maker Portal and ship them through the solution pipeline
Uphold the security model, role-based permissions, audit logging, fail-closed defaults
Drive work through AI coding agents (Replit): scope the task, direct the agent, review the output, verify it
Collaborate directly with a small technical team (investment associate, AI lead, CTO) in a fast-iteration environment
What you'll bring
Strong TypeScript across backend and React front end Solid backend experience with TypeScript on Node.js / Express: API design, auth middleware, integrations
Hands-on experience with Microsoft Dataverse / Power Platform
Experience with Azure (authentication)
Comfortable building and extending React / TypeScript front ends
Disciplined about scope, documentation, and a clear definition of done (typecheck + build + tests pass)
Strong familiarity with AI-assisted/agentic coding tools and workflows
Available part-time initially, with flexibility to scale to full-time
What you get here
Work-life essentials: 24h continuous internet and power facility, shuttle service, and a gym membership to keep you moving
Everyday comforts: Unlimited tea & coffee facilities along with snacks & drinks.
Growth, always: Personal Development Plans through Gapstars Academy, cross-functional learning via GapTalks, and opportunities for overseas travel and training
Life’s milestones, celebrated: Birthday vouchers, wedding and childbirth gifts, anniversary treats, and more, because we celebrate our Stars at every stage
Community & culture: Sports clubs, company events, tournaments, and parties that make Gapstars feel like home
About Gapstars
Gapstars was founded in 2015 on a simple belief: great companies shouldn't be limited by access to talent. By connecting ambitious European scale-ups with the exceptional engineering talent emerging from Sri Lanka, Gapstars set out to build dedicated teams that operate as true extensions of their partners' organisations.
What began as a small, ambitious team has grown into a global organisation of more than 300 experts across Amsterdam, Lisbon, Dubai, and Colombo, supporting over 75 companies worldwide. Today, Gapstars Group continues that journey - connecting visionary companies with the people, processes, and platforms that help them grow across tech, finance, and beyond.