Senior Software Developer (Full-stack, Backend-focused)

Toggle is a product company building eSIM and VPN solutions for global connectivity across all major platforms, including mobile, desktop, and TV.

Role Overview

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.

Direct Manager: Web Tech Lead

Location: Minsk

Format of work: full-time role with flexible start times and a hybrid setup (4 days in the office, 1 remote)

Responsibilities

Developing VPN and eSIM Product Logic:

• implement features for issuing, renewing, and activating eSIM profiles, as well as managing access to VPN servers, user sessions, and subscription plans.

Telecom and Loyalty Vendor Integrations:

• work with the API telecom provider (Telna) to manage data plans and usage, and integrate with Voucherify for promo codes, discounts, and referral programs.

Integrating External Services and APIs:

• design and implement integrations with infrastructure services and external product services.

Backend Feature Development and Maintenance:

• develop product logic, handle webhooks from external providers, and maintain existing codebases using NestJS.

Developing Product and User Flows:

• build end-to-end user journeys across the backend and frontend using React, Next.js, and NestJS — from eSIM plan selection to activation.

Website Development and Enhancement:

• develop and maintain the company's product website, user account portal, and product conversion funnels.

Incident Investigation and System Monitoring:

• analyze logs, investigate service activation failures and analytics delivery issues, and configure monitoring and alerting using Datadog.

Architecture and Code Reviews:

• contribute to architectural design, technical planning, and code reviews.

Testing and Technical Debt:

• improve test coverage for new code and technical debt by writing E2E and unit tests.

Mentoring:

• mentor junior developers, share knowledge, and support their…