Software developer for VPN and eSIM products

Toggle is a product company building eSIM and VPN solutions for global connectivity across all major platforms, including mobile, desktop, and TV. We are looking for a Full-stack Developer with a strong backend focus to develop and maintain the company's core products — VPN and eSIM.

• implement features for issuing, renewing, and activating eSIM profiles, as well as managing access to VPN servers, user sessions, and subscription plans.
• work with the API telecom provider (Telna) to manage data plans and usage, and integrate with Voucherify for promo codes, discounts, and referral programs.
• design and implement integrations with infrastructure services and external product services.
• develop product logic, handle webhooks from external providers, and maintain existing codebases using NestJS.
• build end-to-end user journeys across the backend and frontend using React, Next.js, and NestJS — from eSIM plan selection to activation.
• develop and maintain the company's product website, user account portal, and product conversion funnels.
• analyze logs, investigate service activation failures and analytics delivery issues, and configure monitoring and alerting using Datadog.
• contribute to architectural design, technical planning, and code reviews.
• improve test coverage for new code and technical debt by writing E2E and unit tests.
• mentor junior developers, share knowledge, and support their onboarding and integration into the team.

• 5+ years of commercial software development experience in Middle+ or Senior roles, with a strong backend focus;
• expert knowledge of NestJS, TypeScript, and Node.js, along with experience in modern frontend development using React and Next.js;
• hands-on experience working with external vendors' REST APIs;
• practical experience writing E2E, integration, and unit tests, investigating incidents, and working with monitoring systems such as Datadog and Grafana;
• experience with PostgreSQL, Redis, and Docker, including optimizing complex SQL queries and designing high-load architectures.
• willingness to mentor junior developers, conduct regular code reviews, and foster a strong engineering culture within the team;
• ability to independently break down ambiguous business requirements, propose optimal architectural solutions, and deliver them to production;
• ability to take full ownership of a technical domain and be responsible for service stability and performance;
• ability to collaborate effectively with the Product Managers, Marketers, Designers, and adjacent Engineering teams.
• Будет плюсом: practical experience with CQRS and event-driven architecture; experience with AWS (ECS, RDS, SQS, Lambda, S3, CloudFront) and monitoring and tracing systems such as Datadog; experience in telecom, VPN, eSIM, or working with mobile network operators; experience integrating with solutions such as Voucherify or designing custom services for promo codes, referral programs, and user retention mechanics; understanding of fundamental network security principles, including TLS and cryptography, and practical experience designing fault-tolerant, highly available systems

• official employment and a competitive salary;
• paid vacation + 5 personal days per year;
• support for growth: we cover professional courses, books, and conferences;
• private health insurance (including dental coverage);
• internal English classes;
• fast skill growth in a startup-paced environment;
• a culture of openness, respect, and honest feedback;
• minimal bureaucracy — maximum impact and momentum.