Junaid Farooq

Lead Elixir software engineer — Truely.com

September 2024 — present

• Multi-endpoint Elixir/Phoenix monolith: dashboard, public API, marketing, background jobs for eSIM plans, fulfilment, and provider integrations.
• Telna as first-class provider: template sync, product/channel mapping, channel products v2, dashboard sync/resync.
• Telna webhooks end-to-end (eSIM status, usage/alerts, package status, IMEI changes) and plan updates including ICCID edge cases.
• eSIM subscription sync (Webbing/Telna, eUICC profile API, scheduled workers, rate-limited batch sync) and organisation-facing install/enable events.
• Operational flows: cancel/suspend, balance-line activation, pause/resume, legacy vs unlimited plans.
• ClickHouse analytics (local cluster/dev, schema/migrations, replication, CDR-style naming); KPI dashboards and plan usage improvements.
• GA4 conversion tracking; conversions on Oban for async processing.
• PostgreSQL trigram fuzzy search (GiST indexes, tests) for coverage-style endpoints.
• V2 API expansion (OpenAPI auth/login, orders, user eSIM APIs) with rate limits.
• Share-group redemption and eSIM ownership fixes in group flows.
• Oban workers, throttling for plan updates, job cleaner, Oban Web visibility.
• Security: signup/login rate limits, IP allowlisting from DB, OAuth error hardening, log sensitivity, SQL-injection hardening in commits.

Senior Elixir software engineer — Yolo Group (B2B · UK entity)

July 2024 — November 2025

• Distributed microservices: scalability, fault tolerance, high-throughput processing.
• OpenSearch/Elasticsearch platform: index lifecycle, rollover, retention.
• Domain-driven search abstraction across indices and services.
• Internal observability/analytics (Kibana-style) for distributed systems.
• Real-time pipelines: Phoenix channels and WebSockets.
• ClickHouse analytics for large-scale aggregation and reporting.
• Protobuf contracts across services for type safety and compatibility.
• Telegram bots and multi-tenant broadcast systems.
• Telemetry and reliability patterns inspired by Phoenix Observer.

Senior full-stack Elixir contractor — Helium Health (remote)

September 2021 — April 2025

• OpenAPI + Swagger UI; institution bootstrap and feature flags.
• Institution admin APIs: profile, locations, roles, tariffs, teams, queues, forms, lab catalog, audit.
• Patient lifecycle: registration, record, visits, vitals, immunizations, televisits.
• Clinical documentation, templates, referrals, tasks, communications, libraries.
• Antenatal, labour & delivery, televisit co-invitations.
• Appointments, queues, front-desk; inpatient wards, admissions, documentation.
• Lab and imaging orders through results, billing hooks, external ingestion.
• Pharmacy, inventory, procurement, consumables, patient portal APIs.
• Realtime channels for notifications, queues, prior auth, invoices.
• Reporting and CSV exports across clinical, ops, inventory, pharmacy.

Senior full-stack Elixir contractor — Nectarine Credit (remote)

September 2022 — February 2024

• Built custom dynamic form workflows: VR custom fields, step-based fields, toggle/contact fields, multi-file uploads, required/show logic, and branchable field behavior.
• Implemented fingerprint/identity-risk protection end-to-end: visitor capture, repeated-submission checks, IP + fingerprint scans, smart signals, Slack alerts.
• Developed company-level email notification settings with admin controls, parent-child inheritance, and alert toggles across UI + API.
• Added role/permission capabilities: company roles, user-company role sections, parent users on child companies, and access mutation updates.
• Integrated OpenCorporates data features (API integration, result counts/limits, payload detail surfacing, manual support paths, and company edit sync).
• Delivered opt-out/referral controls, application auditing (history + timestamps + request-agent), and EIN/Federal Tax Number support across UI and PDF exports.
• Shipped NetSuite/external integration updates, omnichannel improvements (attachments/emails, auto-reply handling, cloud-convert fallback), and workflow guard alerts.
• Expanded export/reporting and migration work: CSV outputs, datetime transforms, and reporting-path hardening.

Elixir developer (contractor) — SafeBoda (remote)

June 2022 — August 2022

• Designed and developed the e-wallet product integrated with the payment processor — balances, cash-in/cash-out flows, and audit-friendly transaction handling.
• Integrated payment drivers with gateways (Interswitch, Flexipay) for regional card and mobile money flows.
• Built messaging and background processing with RabbitMQ, Broadway, and RMQ publisher patterns for reliable async work.

Case study: SafeBoda

Lead Elixir engineer — Evercam (remote)

December 2015 — June 2022

• Rails admin/dashboard; Sinatra API rewrite to Phoenix + GraphQL + Swagger + tests.
• Monolith to microservices; Rails to Nuxt + Phoenix APIs.
• Snapshot extractor (RabbitMQ fan-out, Oban, GenServer, BroadwayRabbitMQ); Kafka + Protobuf pipelines.
• Nerves at the edge; hot upgrades (Distillery + Ansible); 1000+ camera workers with RMQ.
• SeaweedFS, RAID, Nagios on Hetzner; Node + React + Apollo + MongoDB services.
• AWS Beanstalk, Amplify, EC2, S3, Route53, Lambda; Redis cache on Phoenix.
• Live streaming JPEGs with Phoenix channels/PubSub; ERPC between services.
• Device management: edge-commander; Eyes of Things demonstrator: Mobile_Camera_Demonstrator.
• Hot upgrades article: Medium.

Development executive (JavaScript engineer) — Highrise Technologies

August 2014 — August 2015

IBM Business Partner — IBM Security Access Manager for Web, Identity Manager, and SSO. Ticketing system evolution: PM2 Node cluster → RabbitMQ → Redis + Nginx reverse proxy.