Remote (Senior) Fullstack Engineer - Freelance

Description:

• Netguru is a trusted partner in digital commerce, helping leading brands modernize B2B solutions, marketplaces, and retail ecosystems since 2008.
• The company empowers businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams.
• Netguru is a certified B Corporation® and has worked with major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.
• As a freelancer at Netguru, you can choose your working hours, location, and project tasks.
• You will be matched with work that fits your skills and have access to various opportunities across different industries.
• The position is for a Senior Fullstack Engineer who has successfully implemented Instagram Login independently.
• The salary range is up to 160 PLN/h on a B2B contract, with full-time engagement.
• The working hours are based on CET, with a start date of 31.01.2026 and a project duration of 2 months.
• Responsibilities include managing the 'App Review' process, configuring the Meta ecosystem, implementing OAuth strategy, and providing technical advisory.

Requirements:

• You must have experience owning the 'App Review' process and managing the complete verification cycle with Meta.
• You should be able to configure the application environment in the Meta for Developers console.
• You need to implement the 'Login with Instagram' flow using OAuth to fetch influencer data points.
• You must act as a subject-matter expert to guide clients through Meta's policies to prevent application rejection.
• Fluency in both Polish and English is required.
• You should have knowledge of OAuth 2.0, Instagram Graph API, and experience with Meta App Review.
• Nice to have skills include familiarity with Passport.js, NextAuth.js, OmniAuth, JWT, OpenID Connect, Facebook Login Kit, and basics of GDPR compliance.

Benefits:

• The position offers 100% remote and flexible work.
• You will work with an experienced team of developers and have opportunities for continuous development of your hard and soft skills.
• The company provides dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review, and bug bashes.
• There is potential for long-term collaboration on challenging products in sectors like FinTech, B2B software, and E-commerce.