Senior Backend Engineer

Job Description

Title: Senior Backend Engineer

Company Name: Seenyor

Vacancy: 1

Age: Na

Job Location: Anywhere in Bangladesh

Salary: Tk. 100000 - 200000 (Monthly)

Experience: --

Published: 2026-04-16

Application Deadline: 2026-04-26

Education:

Requirements: --

Skills Required:

Additional Requirements:

Responsibilities & Context:

The Role

We are hiring a Senior Backend Engineer to own the application backend that ingests radar telemetry from tens of thousands of deployed sensors, routes alerts to monitoring partners in under a second, and powers our family-facing dashboard. You will not own raw DevOps or bare-metal operations , infrastructure is delivered by a managed hosting provider but you WILL own the application-layer architecture, database design, integrations, observability, and the collaboration with that provider to meet our 99.99% SLA..

This is a high-ownership role. You will be the senior backend engineer on the team and will shape how the platform scales from hundreds of devices today to hundreds of thousands.

Key Responsibilities

• Design, build, and maintain REST and/or GraphQL APIs in Node.js (Express/Fastify) or Python for sensor ingestion, partner integrations, and the family dashboard.

• Own the PostgreSQL schema and query performance partitioning, indexing, and read-path optimization for high-volume time-series telemetry.

• Build and harden the IoT ingestion pipeline that receives real-time radar telemetry and fall events from deployed devices (MQTT/WebSocket/HTTPS), including back-pressure handling and replay on reconnect.

• Implement and maintain integrations with PERS monitoring partners— outbound alert delivery, acknowledgements, and reconciliation.

• Partner with the managed hosting provider to meet the 99.99% uptime SLA: define SLOs, design for multi-AZ redundancy and graceful degradation, run game-days, and drive joint incident reviews.

• Instrument the stack with structured logging, metrics, tracing, and alerting (e.g. Datadog, Grafana, Sentry). Own the runbooks.

• Participate in a light on-call rotation for production incidents triage, mitigate, and write postmortems.

• Harden the platform for security and privacy: authn/authz, secrets management, encryption in transit and at rest, least-privilege access, dependency hygiene, and audit logging (with HIPAA-adjacent considerations).

• Ship data migrations safely with zero or minimal downtime, using online-migration patterns.

• Write clean, well-tested code with meaningful unit and integration tests and thoughtful code review.

• Collaborate with firmware, mobile, and product teams to evolve device-to-cloud contracts.

• Document architecture decisions (ADRs) and keep a clear, shared mental model of the system as it grows.

Required Qualifications

• 5+ years of professional backend engineering experience shipping production systems.

• Strong proficiency in at least one of Node.js/TypeScript or Python, with the ability to pick up the other.

• Must have scaled previous IOT platforms. How many users is key.

• Deep working knowledge of PostgreSQL schema design, indexing, query plans, and performance tuning under load.

• Solid experience designing and operating REST APIs (and/or GraphQL) at scale.

• Familiarity with at least one major cloud (AWS, GCP, or Azure) — you understand what the managed provider is doing on your behalf, even if you don't run it yourself.

• Comfortable with Docker, CI/CD, and Git-based workflows.

• Experience with observability tooling — logs, metrics, traces — and with debugging production issues.

• Strong written and verbal English communication; able to work async with a distributed team.

• Track record of working against uptime SLAs and taking on-call seriously.

Nice-to-Have

• Experience in PERS, medical alert, senior care, healthcare, or regulated IoT products.

• HIPAA, SOC 2, or healthcare-data compliance awareness.

• IoT / device telemetry ingestion experience (MQTT, message queues, time-series databases).

• GraphQL in production.

• Go proficiency for high-throughput services.

• Experience integrating with legacy monitoring/alarm industry protocols or APIs.

What Success Looks Like

First 15 days

• Onboarded on the codebase, architecture, and device-to-cloud data flow.

• Shipped at least one meaningful PR to production.

• Built a working relationship with the managed hosting provider and understands the current SLO posture.

• Documented the top 5 reliability and performance risks in the current stack.

First 30 days

• Owns at least one core service end-to-end (e.g. ingestion or partner integration).

• Delivered initial improvements to observability structured logs, dashboards, and alerts tied to SLOs.

• Made measurable progress on the integration milestones.

• Participating in on-call rotation with confidence.

First 60 days

• integration live and meeting contractual performance targets.

• A credible, documented path to 99.99% uptime with load tests, runbooks, and failure-mode playbooks agreed with the managed provider.

• Trusted technical voice on backend architecture decisions as the team scales.

Logistics

• Location: Fully remote, based in Bangladesh.

• Working hours: Core overlap with Europe Time required to collaborate with team and also support America and the US-based team. Expect some days to start later in the afternoon local time.

How to Apply

Email XXXXXXXX with a short note on why this role interests you, a link to your CV or LinkedIn, and if you have one a link to code or a system you're proud of. Bonus points for telling us about a production system where you chased down a nasty reliability issue.

We are an equal opportunity employer. We hire on the basis of skill, ownership, and alignment with our mission to keep older adults safe at home.