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Senior Android Engineer – VPN/Networking

FuseMachines

Pune, Maharashtra, IndiaFull-timeNo compensation foundTracked 2w agoSeen in employer's feed 6 days ago
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At a glance

Compensation
No compensation found
Location
Pune, Maharashtra, India
Schedule
Full-time
Work Authorization
Not specified

Job overview

FuseMachines is hiring a Senior Android Engineer – VPN/Networking. FuseMachines seeks a Senior Android Engineer to design and implement VPN and networking features for Android applications, focusing on secure tunnelling, protocol support, and performance optimization while collaborating with cross‑functional teams on backend and DevOps integrations.

Key focus areas include Design and build VPN tunnel management, routing, and DNS handling, Implement packet capture, forwarding, and MTU handling for TUN interfaces, and Apply strong networking fundamentals including TCP/UDP, TLS, and proxies.

Important skills include Android, Kotlin, Coroutines/Flow, VpnService, Building And Managing A VPN Tunnel, and Routing. Preferred (not required): NDK/JNI, C/C++, Integrating VPN Cores, and Shadowsocks.

Skills & qualifications

RequiredNice to have

Skills

AndroidKotlinCoroutines/FlowVpnServiceBuilding and Managing a VPN TunnelRoutingDNS HandlingPer-App VPNAlways-on VPN BehaviourTUN Interface ConceptsPacket Capture/ForwardingMTUTCP/UDP Basics as They Apply to TunnellingStrong Networking FundamentalsTLSHTTP(S)ProxiesNAT ConceptsLatency/Packet Loss HandlingR8/ProguardCrash/ANR MonitoringPlay Console WorkflowsBuilding and Shipping Native Libraries for Multiple ABIsArm64-V8aArmeabi-V7aGradle/CMake Native BuildsWireGuardKeypairsAllowed-IpsHandshake/Keepalive BehaviourOpenVPNConfig FormatsCypher SuitesConnection StabilityIKEv2/IPsecMOBIKENAT-TStrongSwanSecure StorageCryptographyCertificate Handling/PinningThreat ModelingLeast-Privilege DesignPrivacy-First TelemetryPlay Policy Experience for VPN AppsBuilding Core VPN SDK + App Shell ArchitectureNDK/JNIC/C++Integrating VPN CoresShadowsocks

Qualifications

Prior VPN Product Experience

Full job description

About Fusemachines

Founded in 2013, Fusemachines is a global provider of enterprise AI products and services, on a mission to democratize AI. Leveraging proprietary AI Studio and AI Engines, the company helps drive clients’ AI Enterprise Transformation, regardless of where they are in their Digital AI journeys. With offices in North America, Asia, and Latin America, Fusemachines provides a suite of enterprise AI offerings and speciality services that allow organizations of any size to implement and scale AI. Fusemachines serves companies in industries such as retail, manufacturing, and government.

Fusemachines continues to actively pursue the mission of democratizing AI for the masses by providing high-quality AI education in underserved communities and helping organizations achieve their full potential with AI.

Type: Full-Time, Remote (6-month contractual job with possibility of extension)

Required Skills:

Android

  • Kotlin, coroutines/Flow, modern Android architecture

  • VpnService: building and managing a VPN tunnel, routing, DNS handling, per-app VPN, always-on VPN behaviour.

  • TUN interface concepts: packet capture/forwarding, MTU, TCP/UDP basics as they apply to tunnelling.

  • Strong networking fundamentals: TCP/UDP, TLS, DNS, HTTP(S), proxies, NAT concepts, latency/packet loss handling.

  • NDK/JNI experience (C/C++) for integrating VPN cores (strongly preferred)

  • Release hardening: R8/Proguard, crash/ANR monitoring, Play Console workflows

  • Building and shipping native libraries for multiple ABIs (arm64-v8a, armeabi-v7a).

  • Experience with Gradle/CMake native builds.

Protocols

  • WireGuard (keypairs, allowed-ips, handshake/keepalive behaviour)

  • OpenVPN (TLS, config formats, cypher suites, connection stability)

  • IKEv2/IPsec (EAP/TLS or PSK auth options, MOBIKE, NAT-T), strongSwan

  • Shadowsocks / custom tunnelling (optional)

Security & privacy

  • Android Keystore, secure storage, encryption, certificate handling/pinning where appropriate

  • Threat modelling, least-privilege design, privacy-first telemetry

Others

  • Prior VPN product experience (consumer or enterprise)

  • Play policy experience for VPN apps

  • Experience building “core VPN SDK + app shell” architecture

  • Backend/DevOps (Optional)

  • One backend stack: Go/Java/Node/Python + PostgreSQL (or equivalent)

  • Secure API design, secrets management (KMS/Vault), rate limiting

  • Linux networking: iptables/nftables, routing, sysctl tuning

  • Infra-as-code and CI/CD; monitoring (Prometheus/Grafana), centralized logs

Deliverables/success metrics

  • Stable connections across protocols, minimal battery impact

  • No DNS/IP leaks in standard test suites

  • (Nice to have) Automated provisioning pipeline for servers and user/device configs (Nice to have) Monitoring dashboards + alerting; documented runbooks

Fusemachines is an Equal Opportunities Employer, committed to diversity and inclusion. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or any other characteristic protected by applicable federal, state, or local laws

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