Senior ML Engineer

🔥 3 hours ago

🌐 Serbia, Spain – Remote

🇷🇸 Serbia – Remote 🇪🇸 Spain – Remote

⏰ Full Time

🟠 Senior

🤖 Machine Learning Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Social Discovery Group

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 20 years

🌍 Social Impact

📱 Media

Social Impact • Media • Entertainment

Social Discovery Group is the world's largest group of social discovery companies, focused on solving the problems of loneliness, isolation, and disconnection through digital reality. With 500 million users across 150 countries, the group boasts over 60 global communication and entertainment platforms. Employing a team of 1200 professionals, the company organizes events that unite a global community of professionals and provides career opportunities for individuals seeking ambitious challenges.

📋 Description

• Set the ML direction by choosing strategic bets and tying each to clear business needs • Drive LLM post-training and model adaptation end to end, from dataset construction to fine-tuning and preference optimization • Design and build agent harnesses and tool-using LLM systems • Shape multi-agent development workflows to improve team effectiveness • Build evaluation frameworks and LLM-as-a-judge systems that predict real-world performance • Improve dialogue quality across memory, emotional intelligence, persona consistency, safety, and anti-loop behavior • Ship production systems that directly shape user experience, retention, and monetization

🎯 Requirements

• Python expert level: clean code, typing, async, multiprocessing, profiling, debugging, notebooks + production code • Transformers • Training and fine-tuning LLMs • SFT, LoRA/QLoRA, PEFT • Preference optimization: DPO / ORPO / SimPO / CPO / GRPO or willingness to quickly go deep • Building datasets for LLM training: cleaning, filtering, deduplication, preference pairs, synthetic data, hard negative mining • LLM evaluation: offline evals, pairwise evals, LLM judges, human annotation • Agent harness design: tool calling, function calling, structured outputs, retries, routing, state management, memory/context, guardrails • Production LLM integration: APIs, streaming, batching, fallbacks, cost/latency trade-offs • Observability for agents: traces, tool-call logs, transcript analysis, failure clustering • Strong understanding of transformer architecture and modern LLM behavior • Accuracy with dtype/device/batching: fp32/fp16/bf16, quantization, CUDA memory, avoiding dtype mismatch bugs • Git, Docker, Linux, basic MLOps • Fluent Russian • Ready to work in CET (±2) hours • Nice to have: experience beyond text (computer vision, image generation, multimodal), long-running conversations and character consistency, vLLM / TGI / SGLang, DeepSpeed / FSDP / Accelerate, quantization, safety classifiers

🏖️ Benefits

• REMOTE OPPORTUNITY to work full-time • Vacation 28 calendar days per year • 7 wellness days per year (time off) • Bonuses up to $5000 for recommending successful applicants for positions in the company • 50% payment for professional training, international conferences, and meetings • Corporate discount for English lessons • Health benefits: compensation of up to $1,000 gross per year per employee for self-purchase of health insurance or doctor’s fees for yourself and close relatives if not eligible for corporate medical insurance • Equipped workplace and necessary equipment in offices or co-working locations • Reimbursement of workplace costs up to $1000 gross once every 3 years for co-working rent or home office equipment • Internal gamified gratitude system with bonuses exchangeable for merchandise, team building activities, massage certificates, etc.