Senior Full-Stack Connectivity Engineer

1 Month ago • 3 Years +

Job Summary

Job Description

The Senior Full-Stack Connectivity Engineer will analyze third-party client-side web solutions, design and maintain Node.js middleware, and develop React 18 single-page apps. They will work in an agile environment, manage service dependencies, participate in code reviews, and ensure full-cycle feature delivery. The role requires a deep understanding of JavaScript, browser internals, and networking fundamentals. The engineer will need to write clean, testable code and have good UX sensibility. The job involves reverse engineering, inspecting network traces, and utilizing various tools. The engineer will need to have confident Git workflow and team development habits. Must be a fluent Russian speaker and have a B1+ level of English proficiency.
Must have:
  • 3+ years of JavaScript and TypeScript experience on Node.js.
  • Strong understanding of modern browser internals and networking fundamentals.
  • Experience analyzing or reverse-engineering web front-ends.
  • Proficiency with proxy / MITM tooling or interception libraries.
  • Solid understanding of HTML5 / CSS3 and responsive UI patterns.
  • Familiarity with webpack, Babel, Docker, and GitLab CI.
  • Ability to write clean, testable code and unit tests.
  • Confident Git workflow, code reviews and team development habits.
  • Strong knowledge in website vulnerability analysis.
Good to have:
  • Proficiency with Nginx (reverse-proxy, load balancing, caching).
  • Experience designing or auditing high-load network services.
  • Familiarity with WebAssembly and static-analysis tooling.
  • Experience with cloud providers (AWS, GCP, etc).
  • Practical skills with React 18 and state management (Redux-Saga).
Perks:
  • Full-time remote work opportunities and flexible working hours
  • Comprehensive Mental Health Programme
  • Private insurance
  • Sports program compensation
  • Free online English lessons
  • An additional 1 Day off per calendar year
  • Generous referral program
  • Training, internal workshops, and participation in international professional conferences and corporate events.

Job Details

Overview:

SOFTSWISS continues to expand the team and is looking for a Senior Full-Stack Connectivity Engineer.

We need a true, experienced, and accomplished professional who shares our culture and values.

About Product:

SOFTSWISS Game Aggregator
A fast and cost-effective solution that allows you to integrate and manage casino gaming content easily.
Learn More

Key Responsibilities:

  • Deep-dive analysis of third-party client-side web solutions — tracing API flows, auth sequences, and performance hotspots.
  • Design, build, and maintain high-throughput Node.js middleware that routes external web traffic through internal services.
  • Develop and occasionally extend companion React 18 single-page apps (dashboards, simulators, internal tools).
  • Work in a fully agile environment (Scrum) alongside senior engineers, product managers, and security specialists.
  • Manage service dependencies, versioning, and CI/CD pipelines (GitLab CI, Docker, Open API, SSE).
  • Participate in code reviews, backlog grooming, retrospectives, and continuous product-quality improvement.
  • Write and maintain unit, component, and e2e tests; ensure full-cycle feature delivery — estimation, decomposition, implementation, release.

Requirements:

  • 3+ years of production experience with JavaScript (ES6+) and TypeScript on Node.js, deep understanding of vanilla JavaScript.
  • Solid understanding of modern browser internals: page lifecycle, DOM & JS runtime, resource loading (HTTP/2, QUIC, CORS, CSP, Service Workers, WebSockets).
  • Hands-on experience analysing or reverse-engineering web front-ends: reading minified / obfuscated code, reproducing business logic, inspecting network traces.
  • Proficiency with proxy / MITM tooling (mitmproxy, Charles, Burp Suite) or programmatic interception libraries (http-proxy, undici hooks).
  • Strong grasp of networking fundamentals (TCP/IP, TLS, DNS, SOCKS/HTTP proxying) and traffic encryption concepts.
  • Solid understanding of HTML5 / CSS3 and responsive UI patterns.
  • Familiarity with webpack, Babel, Docker, GitLab CI, GitLab package registry, semantic versioning, and Open API specs.
  • Ability to write clean, testable code and corresponding unit tests.
  • Good UX sensibility and attention to performance and accessibility.
  • Confident Git workflow, code reviews, and team development habits.
  • Strong knowledge in website vulnerability analysis.
  • Fluent Russian speaker; English proficiency at B1+ level.

Nice to Have:

  • Proficiency with Nginx (reverse-proxy, load balancing, caching).
  • Experience designing or auditing high-load network services (10k+ RPS).
  • Familiarity with WebAssembly, static-analysis tooling (webpack-bundle-analyzer, source-map-explorer).
  • Experience with cloud providers (AWS, GCP, etc) and their load-balancing stacks.
  • Practical skills with React 18 and state management (Redux-Saga).

What we offer:

  • Full-time remote work opportunities and flexible working hours
  • Comprehensive Mental Health Programme
  • Private insurance
  • Sports program compensation
  • Free online English lessons
  • An additional 1 Day off per calendar year
  • Generous referral program
  • Training, internal workshops, and participation in international professional conferences and corporate events.

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About The Company

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