---
title: 'Senior Software Engineer, Java at Telnyx'
canonical: 'https://feeny.ai/job/senior-software-engineer-java-telnyx-sao-paulo-dxf4z5yzyyc7'
type: 'job'
last_seen: '2026-11-07'
---

# Senior Software Engineer, Java at Telnyx

- **Company:** Telnyx
- **Location:** São Paulo, Brazil / Austin, TX / Argentina Dublin, Ireland
- **Posted:** 2020-08-20
- **Last confirmed live:** 2026-11-07
- **Apply:** https://job-boards.greenhouse.io/telnyx54/jobs/4139272003

## Job description

## About Telnyx

Telnyx is an industry leader that's not just imagining the future of global connectivity—we're building it. From architecting and amplifying the reach of a [private, global, multi-cloud IP network](https://telnyx.com/our-network), to bringing [hyperlocal edge](https://telnyx.com/resources/about-edge-connectivity) technology right to your fingertips through intuitive APIs, we're shaping a new era of seamless interconnection between people, devices, and applications.

We're driven by a desire to transform and modernize what's antiquated, automate the manual, and solve real-world problems through innovative connectivity solutions. As a testament to our success, we're proud to stand as a financially stable and profitable company. Our robust profitability allows us not only to invest in pioneering technologies but also to foster an environment of continuous learning and growth for our team.

Our collective vision is a world where borderless connectivity fuels limitless innovation. By joining us, you can be part of laying the foundations for this interconnected future. We're currently seeking passionate individuals who are excited about the opportunity to contribute to an industry-shaping company while growing their own skills and careers.

Our backend team is building a highly-available and distributed data pipeline that powers Telnyx products like Voice, Messaging and Wireless. We leverage the Telnyx private backbone network to build a cloud-agnostic data platform that processes thousands of messages per second.

With our lean team, we're currently running and managing more than 30 dockerized microservices deployed in multiple regions in the U.S. and Europe. We are looking for a senior Java backend engineer with deep knowledge of Java Core.

In this role you will

- Work on 30+ microservices implemented in Java 21 and Scala that process, aggregate and expose all data our telecommunication and messaging engines generate
- Improve performance of our pipeline — we currently process 10k messages/sec and are growing
- Architect our services and pipelines so they work with minimum latency in all our locations around the world (U.S., E.U., Australia, South America)
- Implement fraud detection processes with machine learning (Kafka and Kafka Streams)
- Deploy services to multi-cloud Kubernetes environments to achieve 99.999% uptime
- Push code to production multiple times a day

## What we're looking for

- Degree in Computer Science, Information Technology, or equivalent work experience
- 4+ years of experience with Java and its ecosystem of tooling
- Experience with at least one of these databases: Cassandra, ClickHouse, or OpenSearch
- Experience with AI tooling, or a strong willingness to learn

## Nice to have

- Experience with Scala or another functional programming language
- Experience with Linux, Git, and Docker in a CI environment
- Experience with distributed systems and systems that maintain "five nines" (99.999%) of uptime

## LI-DUBLIN

## LI-BRAZIL

## About Telnyx

## Core Business
- **Primary industry**: Telecommunications / AI Infrastructure
- **Target customers**: B2B – developers, enterprises, and communications service providers building voice AI agents, programmable voice, messaging, and IoT solutions.
- **Mission or purpose**: To own the full stack from carrier network to AI inference so that customers can build real-time voice AI agents with no handoffs, no lag, and carrier-grade reliability.

## Products & Services
- **Voice AI Agents**: Carrier-native voice AI with bundled STT (speech-to-text), LLM inference, and TTS (text-to-speech) on a Tier-1 network. Priced at $0.05/min for the full bundle.
- **SIP Trunking**: Elastic SIP trunking for enterprise voice, outbound from $0.005/min, inbound from $0.0035/min.
- **Programmable Voice & Messaging (SMS/MMS)**: RESTful APIs for call control, conferencing, recording, and SMS/MMS from $0.004 per outbound message.
- **AI Inference**: Edge-deployed GPU inference for voice and text AI, with per-token pricing or x402 pay-per-call.
- **Wireless (Mobile IoT)**: Programmable eSIM and roaming for IoT devices.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: Annual revenue estimated at $16.0M (LinkedIn); total funding raised $2.1M.
- **Notable Investors/Partners**: Not publicly disclosed (only 2 prior funding rounds mentioned, lead investors unknown).
- **Growth Signals**: Headcount grew 21.5% YoY to ~300 employees; 121 active job postings (monthly job postings +27.4%, quarterly +202.5%, yearly +830.8%); operates in 34 countries; customer base includes 14,000+ industry-leading companies (Alibaba, Neon Health, etc.).

## Competitive Advantages
- **Full-stack ownership**: Telnyx owns its carrier network (CLEC licenses, STIR/SHAKEN A-level) and co-locates GPU compute at the telco edge, bypassing the public internet for low-latency voice AI.
- **Single vendor for voice AI**: Bundles SIP, STT, LLM, and TTS – no need to stitch together multiple providers.
- **Compliance by default**: Holds HIPAA, SOC 2 Type II, GDPR, ISO 27001, and PCI DSS certifications; built-in programmatic compliance (10DLC/KYC).
- **Private global network**: Operates a private IP network across 40+ countries, ensuring deterministic routing and high-quality audio.

## Strategic Focus
- **Voice AI agents**: Deep investment in real-time conversational AI infrastructure, including machine-readable evaluation endpoints and benchmark tools for developers.
- **Global expansion**: Continues to add PoPs and data center locations (Amsterdam, Dublin, Warsaw, Bangalore, etc.) to reduce latency.
- **AI-native platform**: Building autonomous orchestration for agent-to-agent workflows and inference at the edge.

## Why Work Here
- **Work flexibility**: Remote-first with in-person options in Austin, Amsterdam, Dublin, and Warsaw. Many roles are fully remote.
- **Culture & perks**: Unlimited personal time off, healthcare benefits (US, UK, Ireland), 401(k) matching (US), equity, commuter benefits, free snacks/drinks in offices.
- **Growth opportunities**: Strong promotion policies with customized development tracks; apprenticeship programs; job training and conferences.
- **Engineering culture**: Heavy investment in Elixir, Python, and AI infrastructure; open-source contributions (GitHub, npm); collaborative teams across time zones.
- **Global team**: 300+ employees across 34 countries with a diverse, inclusive hiring approach.

## Sources
1. [Telnyx Official Website](https://telnyx.com/)
2. [Telnyx Careers Page](https://telnyx.com/careers)
3. [LinkedIn Company Profile](https://www.linkedin.com/company/telnyx)
4. [Built In Company Profile](https://builtin.com/company/telnyx)
5. [Greenhouse Job Board](https://job-boards.greenhouse.io/telnyx54)

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