Back End Developer

CONSTELLI; Hyderabad; On-site; INR 1,100,000 - 1,900,000; Full time

Job summary

CONSTELLI is hiring a Python Backend Engineer to own high-throughput backend services and coordinate with frontend and C# teams for real-time data routing across platforms.

You will design async REST and WebSocket endpoints using FastAPI, implement robust data flows, and ensure reliability under sustained load in a production environment.

Qualifications

• 3-4 years of professional backend experience in Python.
• Strong asyncio/concurrent programming for high-throughput I/O.
• Production experience with FastAPI and pydantic validation.
• Experience with Kafka, RabbitMQ, or NATS.
• PostgreSQL with SQL optimization and schema design.
• Familiar with Timeseries DB (TimescaleDB/InfluxDB/QuestDB).
• Solid TCP/UDP, WebSocket, HTTP/REST debugging.
• Linux, Git-based workflows.
• Testing with pytest and CI pipelines.

Responsibilities

• Data ingestion and processing for high-frequency streams across sources.
• Develop REST and WebSocket services with FastAPI, including validation and observability.
• Implement pub/sub messaging for reliable data distribution.
• Model and optimize relational and time-series databases for write/read performance.
• Collaborate with hardware/embedded, frontend, and C# teams to define contracts.
• Write tested, reviewed code; contribute to deployment, monitoring and operations.

Skills

Python backend

Async programming

FastAPI

PostgreSQL

Kafka/RabbitMQ

TimescaleDB

Linux

Git workflows

pytest

CI pipelines

Education

B.E./B.Tech in Computer Science/IT/ECE

Job description

We are hiring a Python Backend Engineer to take ownership of high-throughput backend services. You will work alongside our front-end and C# application teams to build the infrastructure that ingests, processes, and routes real-time data streams across our platforms.

This role is for someone who enjoys asynchronous Python, complex data-flow problems, and the discipline of building production systems that need to run reliably under sustained load.

About Us

We are a dynamic team of young engineers, domain experts, and seasoned sales professionals dedicated to providing comprehensive turnkey solutions for complex challenges in Signal Processing. Our expertise spans the cutting-edge technologies in Signal Processing, addressing critical needs in the Defence and Aerospace sectors. Our offerings encompass a wide range of solutions, from tactical radios and radar systems to extensive research and mission-critical applications.

Responsibilities

• Data Ingestion & Processing: Design backend services that handle continuous, high-frequency data streams and telemetry from multiple sources, including raw and binary protocols over TCP/UDP.
• API & Service Development: Build robust, scalable REST and WebSocket services using FastAPI, with proper schema validation, error handling, and observability built in from the start.
• Event-Driven Architecture: Implement and operate pub/sub messaging systems to enable reliable data distribution across microservices.
• Database Design & Optimization: Model and query relational and time-series stores efficiently — raw events, derived state, and aggregated roll-ups — with attention to write throughput and query latency.
• System Integration: Collaborate with hardware/embedded, front-end, and C# teams to define clean contracts and ensure reliable data flow across system boundaries.
• Engineering Discipline: Write tested, reviewed, and documented code; participate in design discussions; contribute to deployment, monitoring, and operational practices.

Qualifications

• Experience: 3-4 years of professional backend software engineering experience, primarily in Python.
• Asynchronous Python: Strong working knowledge of asyncio and concurrent programming patterns for high-throughput I/O.
• API Frameworks: Production experience with FastAPI (or comparable async frameworks such as Starlette, aiohttp, or Sanic) and pydantic-based schema validation.
• Message Brokers: Hands-on experience with at least one event streaming or message broker platform — Apache Kafka, RabbitMQ, NATS, or equivalent.
• Databases: Proficient with PostgreSQL and capable of writing optimized SQL; comfortable with schema design, indexing, and query profiling.
• Time-Series Data: Working familiarity with time-series databases (e.g., TimescaleDB, InfluxDB, QuestDB) and the trade-offs of heavy-write workloads.
• Networking: Solid grasp of TCP/UDP, WebSockets, and HTTP/REST; able to debug at the protocol level when needed.
• Platform & Tooling: Comfortable on Linux, Git-based workflows.
• Testing & Quality: Demonstrated practice with pytest, unit and integration testing, and CI pipelines.

Good to have

• Binary Protocols & Telemetry: Experience parsing custom binary frames, working with raw telemetry, or interfacing with hardware or IoT data sources.
• Geospatial Data: Familiarity with PostGIS, GeoJSON/KML, or coordinate-system handling.
• Systems Interoperability: Experience interfacing Python with C/C++ libraries via ctypes, cffi, pybind11, or shared library bindings.
• On-Premises Deployment: Comfortable building and operating systems in air-gapped or LAN-only environments, not exclusively cloud-managed.
• Education: B.E./B.Tech in Computer Science, IT, ECE, or a related discipline.
• Culture of Excellence: We are committed to fostering a culture where every individual can thrive, grow, and make a difference.
• Opportunities for Growth: We believe in investing in our people and providing opportunities for professional development and advancement.
• Collaborative Culture: Join a collaborative and supportive work environment where your contributions are valued and recognized.
• Innovative Environment: Be part of a team that thrives on innovation and is committed to pushing the boundaries of RF technology.