Search Backend Infra Engineer Job at Perplexity (Belgrade)

Senior Machine Learning Engineering Manager, Gen AI

We're seeking a Senior Machine Learning Manager (M60) to lead a cross-functional...

Location

United States

Salary:

193500.00 - 303150.00 USD / Year

Atlassian

Expiration Date

Until further notice

Requirements

8+ years in ML, search, or backend engineering roles, with 3+ years leading teams
Strong track record of shipping ML-powered or LLM-integrated user-facing products
Experience with RAG systems (vector search, hybrid retrieval, LLM orchestration)
Deep experience in either modeling (e.g., LLMs, search, NLP) or engineering (e.g., backend infra, full-stack), with the ability to lead end-to-end
Deep understanding of LLM ecosystems (OpenAI, Claude, Mistral, OSS), orchestration frameworks (LangChain, LlamaIndex), and vector databases (Weaviate, Pinecone, FAISS, etc.)
Strong product intuition and ability to translate complex tech into valuable user features
Familiarity with GenAI evaluation methods: hallucination detection, groundedness scoring, and human-in-the-loop feedback loops
Master’s or PhD in Computer Science, Machine Learning, or related field preferred—or equivalent practical experience

Job Responsibility

Lead the vision, design, and execution of LLM-powered AI products, leveraging advance AI modeling (e.g. SLM post-training/fine-tuning), RAG architectures and hybrid ranking system
Define system architecture across retrievers, rankers, orchestration layers, prompt templates, and feedback mechanisms
Work closely with product and design teams to ensure delightful, fast, and grounded user experiences
Build and manage a cross-disciplinary team including ML engineers, backend/frontend engineers, and applied scientists
Foster a culture of E2E ownership — empowering the team to move from prototype to production quickly and iteratively
Mentor individuals to grow in both technical depth and product acumen
Shape the technical roadmap and long-term strategy for GenAI search across Atlassian’s product suite
Partner with platform and infra teams to scale inference, evaluate performance, and integrate usage signals for continuous improvement
Champion data quality, grounding, and responsible AI practices in all deployed features

What we offer

health and wellbeing resources
paid volunteer days

Fulltime

New

Search Golang Engineer

Join Perplexity AI as a Search Golang Engineer and help architect the next gener...

Location

Belgrade, London, Berlin

Salary:

Not provided

Perplexity

Expiration Date

Until further notice

Requirements

Significant experience developing scalable Golang services for production environments
Deep understanding of distributed systems, microservices, and cloud infrastructure (AWS preferred)
Proven track record implementing systems that scale to millions of users
Strong background in Linux performance tuning, monitoring, and debugging
Experience with CI/CD pipelines, containerization, and automation
Ability to proactively tackle scaling challenges—anticipating bottlenecks before they arise
Passion for building backend solutions that power real-time, reliable search

Job Responsibility

Build highly scalable, distributed backend services using Golang
Design, develop, and maintain search infrastructure that supports exponential traffic growth
Engineer cloud-native solutions, optimizing for horizontal scale and rapid failover
Implement robust monitoring, autoscaling, and incident recovery strategies
Collaborate with product, infra, and devops teams to maximize throughput and resilience
Drive improvements in CI/CD, automation, and operational excellence for backend systems
Mentor peers and champion scalable design principles across the organization

Fulltime

New

Senior AI Platform Engineer - Data and Knowledge

We’re hiring a Senior AI Platform Engineer (Knowledge & Data) to build and own t...

Location

Salary:

Not provided

MaintainX

Expiration Date

Until further notice

Requirements

5+ years of experience in Python backend engineering and systems design experience
Experience shipping AI-powered or LLM-integrated backend systems
Experience with vector DBs (Qdrant/Pinecone/Chroma/etc.)
Understanding of embeddings, chunking, and retrieval strategies
Experience building search or retrieval systems over unstructured data
Comfort working across multiple layers (services, data, infra, AI tooling)

Job Responsibility

Build scalable backend services and internal APIs for the AI platform
Integrate LLMs and retrieval into reliable, production-ready workflows
Build knowledge ingestion pipelines for LLMs (documents, APIs, semi-structured data)
Design chunking and embedding approaches together with vector DB data models and indexing strategies
Implement retrieval pipelines (semantic, keyword, hybrid) and caching
Contribute to shared infrastructure: CI/CD, observability, deployments

What we offer

Competitive salary and meaningful equity opportunities
Healthcare, dental, and vision coverage
401(k) / RRSP enrollment program
Take what you need PTO

Staff Software Engineer

The Discovery team sits at the core of Harmonic’s product and data engine. We ma...

Location

United States , New York

Salary:

210000.00 - 280000.00 USD / Year

Harmonic

Expiration Date

Until further notice

Requirements

7-8+ YoE building distributed systems or large scale backend architecture
Designed and scaled search, recommendation, or ranking systems that balance precision, recall, and performance
Led or heavily contributed to ML or LLM integrations in production
A track record of technical leadership mentoring others, introducing frameworks, and influencing technical direction
Strong experience with data-intensive systems, asynchronous processing, or event-driven architectures

Job Responsibility

Architect the core intelligence behind Scout
Own the end to end architecture of our sourcing engine from data ingestion, ranking, personalization, and model orchestration
Define scalable frameworks for retrieval, reranking, and LLM driven evaluation to ensure we deliver highly personalized and high quality results
Create architectural patterns that integrate Scout seamlessly with our existing products to power repeatable sourcing workflows
Lead agentic experimentation and evaluation
Drive technical discovery for emerging technologies (e.g. memory systems, schema, prompt libraries, embedding models, and agentic frameworks)
Improve and extend our evaluation pipelines to test new models and determine lifts in specific parts of our product
Build systems that allow fast iteration without compromising quality or reliability
Shape AI native product experiences
Partner with product and design to define patterns that make LLM powered sourcing intuitive and fast

What we offer

Top of the line health, dental and vision insurance, with 100% premium covered
401k matching
Free lunch in office
Monthly team dinner for each office
Commuter benefits

New

Forklift Operator

We are looking for an experienced talent for the role of Forklift Operator to jo...

Location

Canada , Scarborough

Salary:

22.00 - 26.00 CAD / Hour

Randstad

Expiration Date

April 15, 2026

Requirements

Minimum 1 year of experience operating the counterbalance forklift
Valid external forklift certification is required
Ability to work standing/walking for extended periods
Completion of high school education or equivalent
Must be comfortable lifting up to 50 lbs

Job Responsibility

Safely operate the Counterbalance forklift
Performing critical warehousing tasks, including palletizing, loading and unloading trailers
Handling product boxes, requiring comfort with lifting up to 50 lbs
Maintaining a high level of safety and productivity in a fast-paced environment
Other duties as assigned

What we offer

Weekly Pay cycles
Opportunities for career advancement and training

Fulltime

New

Senior Marketing Media Analyst

Ramp is in a critical phase of growth, and this role is responsible for helping ...

Location

United States , New York

Salary:

107120.00 - 176770.00 USD / Year

Ramp

Expiration Date

Until further notice

Requirements

You’re a master with data analysis and have an exceptional ability to draw key insights from both quantitative and qualitative data
You have a “get things done” mentality
you can dissect complex problems, identify solutions, and drive these solutions to completion with a high degree of autonomy
You are creative and can see how the pieces of a complex problem fit together
you feel comfortable challenging assumptions when they are not well-based
You like to build - you enjoy the process of going from problem to solution regardless of the medium
You are passionate about deeply understanding our product and customers' needs to generate meaningful campaigns that reach our customers at the right time with the right message
You have a team-first mentality and communication skills that allow you to influence others at all levels and across all functions within the organization to rally behind shared business goals

Job Responsibility

Find “alpha” in a competitive environment: the under-priced assets which deliver higher impact for lower costs than the traditional media buys which everyone knows about
Deliver strategic frameworks which inform how we allocate marketing budget among brand marketing channels, and within them
Recommend experiments for unconventional brand marketing channels / creative strategies and work with the team to execute on those experiments
Design a measurement framework for the effectiveness of each placement / media buy, and work with the marketing technology team to implement and monitor it on a regular basis

What we offer

100% medical, dental & vision insurance coverage for you
Partially covered for your dependents
One Medical annual membership
401k (including employer match on contributions made while employed by Ramp)
Flexible PTO
Fertility HRA (up to $10,000 per year)
Parental Leave
Unlimited AI token usage
Pet insurance
Centralized home-office equipment ordering for all employees

Fulltime

New

Lifecycle Marketing Lead

We’re looking for a Lifecycle Marketing Lead to own and evolve the end-to-end cu...

Location

United States

Salary:

Not provided

OpenRouter

Expiration Date

Until further notice

Requirements

7-10 years of experience in lifecycle marketing, growth marketing, product growth, or adjacent roles—ideally in PLG or developer-focused products
Strong analytical instincts and experience working directly with product usage data and experimentation
Hands-on experience with lifecycle and experimentation tooling (e.g. email platforms, marketing automation, PostHog or similar)
Track record of working directly with engineers, designers and analysts to bring projects to life
Clear understanding of how onboarding, activation, and lifecycle systems drive product-led growth
Comfort owning strategy while executing tactically in an early-stage, evolving environment
Strong cross-functional communication skills and ability to work effectively with product and engineering partners

Job Responsibility

Own onboarding, activation, and early lifecycle performance
Build and operate lifecycle programs driven by product usage
Run experiments that compound product-led growth
Support PLG-to-sales motions with high-quality signals
Define, measure, and communicate lifecycle success
Partner cross-functionally to ship the journey

What we offer

Competitive compensation, including base salary and equity

Fulltime

New

CRM Developer (Dynamics 365)

We are currently hiring an experienced CRM Developer (Microsoft Dynamics 365) fo...

Location

Austria , Vienna

Salary:

35.00 - 47.50 EUR / Hour

Xcede

Expiration Date

April 04, 2026

Requirements

Several years of experience as a CRM Developer (Dynamics 365)
Strong hands-on development experience with: C#
JavaScript
Plugin development
Workflows
Microsoft Power Platform
Experience working with: Dynamics 365 Sales
Customer Insights
Project Operations
Ability to translate business requirements (User Stories) into scalable technical solutions

Job Responsibility

Implementation and customization within Microsoft Dynamics 365
Development across the following modules: Dynamics 365 Sales
Dynamics 365 Customer Insights
Dynamics 365 Project Operations
Technical implementation of requirements defined in User Stories
Development using: C#
JavaScript
Plugin development
Workflows
Microsoft Power Platform (Power Apps, Power Automate)

What we offer

Long-term stability within an enterprise Microsoft ecosystem
Opportunity to work on complex Dynamics 365 CRM development projects
Collaboration with senior architects and experienced CRM professionals
Hybrid flexibility with predominantly remote work

Search Backend Infra Engineer

Perplexity

Location:
Serbia , Belgrade

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
February 21, 2026

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