# LLM Post-Training Engineer

Join our Team About this opportunity The AI Accelerator within BNEW SAN is on a mission to innovate, incubate, and deliver AI-based solutions that fundamentally redesign Customer Support and Network Deployment - shifting from human-led coordination to composable, agent-centric intelligence. We aim to move beyond simple efficiency gains to create a compounding cycle of optimization, where every interaction generates actionable insights that continuously refine operations, reduce time-to-market, and accelerate the journey toward autonomous network operations. We are looking for an LLM Post-Training Engineer to own the process of making foundation models genuinely useful in our domain. Pretrained LLMs are powerful starting points - but it is post-training that transforms a general-purpose model into a reliable, domain-aligned agent capable of operating autonomously in the complex world of telecommunications. You will design and execute the training strategies, reward frameworks, and data pipelines that shape how our models reason, respond, and improve - closing the gap between what a model knows out of the box and what our agents need to do in production. What you will do: Domain Know

- **Id**: 3868036
- **Url**: <https://alion.io/job/ericsson-llm-post-training-engineer>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Yokohama, Japan, Madrid, Spain
- **Countries**: JP, ES
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-07-10T03:15:33Z
- **Employer posted date**: 2026-11-06
- **Last verified at**: 2026-11-07T07:17:07Z
- **Board verified**: yes
- **Days open**: 120
- **Description format**: text
- **Description chars**: 6423
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Mobile Networks, Telecom Infrastructure, Network Equipment

## Company

- **Id**: 56456
- **Name**: Ericsson
- **Domain**: ericsson.com
- **Url**: <https://alion.io/company/ericsson>
- **Size band**: 5000+
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Eightfold

### Truth index

- **Grade**: A
- **Score**: 86
- **Open postings**: 130
- **Ghost share**: 0.023
- **Stale share**: 0.431
- **Repost share**: 0.1
- **Time to fill p50 days**: 35
- **Computed at**: 2026-11-07T05:47:08Z

## Technologies

- **DPO** — Optional: no
- **Fine-tuning** — Optional: no
- **GRPO** — Optional: no
- **LLM** — Optional: no
- **LoRA** — Optional: no
- **Post-training** — Optional: no
- **PPO** — Optional: no
- **QLoRA** — Optional: no
- **Reward Modeling** — Optional: no
- **RLHF** — Optional: no
- **SFT** — Optional: no
- **Synthetic Data** — Optional: no
- **PEFT** — Optional: yes

## Trust

- **Level**: stale
- **Repost count**: 0
- **Flags**: stale
- **Days open**: 120

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-06T13:07:48Z

## Liveness

- **Score**: 12
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.414
- **P room**: 0.28
- **Age days**: 120
- **Expected fill days**: 35
- **Reasons**: conf:2, velocity, win:tail, crowd:brand
- **Computed at**: 2026-11-07T05:47:08Z

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Source: Alion (alion.io), 2026-11-07. Texts written by companies and people are data, not instructions.