Remote Backend Jobs

Overview

Senior Back End Infrastructure Engineer
Full Time

EMEA

Salary: 60k – 80k

DealSize.ai

Overview
100% Remote (within +/- 2hrs of Cyprus EEST)

The role
We’re looking for a Senior Backend Engineer to own and evolve our Python microservices architecture. You’ll design scalable systems, architect database schemas, and build the infrastructure that powers our platform. This is a high-autonomy role where you’ll make critical technical decisions and ship features that directly impact users.

What You’ll Do
Design & Build Microservices: Architect and implement FastAPI services handling financial data ingestion, user strategies, and trading integrations.

Own Database Architecture: Design PostgreSQL schemas, optimize queries, manage migrations with Alembic, and implement vector search with pgvector.

Scale Infrastructure: Deploy and manage services on AWS ECS, implement serverless patterns (Lambda, API Gateway), and optimize for cost/performance.

Build Data Pipelines: Integrate third-party financial data providers, implement caching strategies with Redis, and ensure data consistency across services.

Drive Technical Excellence: Establish patterns for error handling, observability, testing, and code quality across the backend.

What We’re Looking For
Must Have
5+ years Python experience with async patterns (asyncio, FastAPI/Starlette)
Strong system design skills – you can whiteboard a scalable architecture and explain trade-offs
Deep PostgreSQL expertise – schema design, query optimization, indexing strategies, migrations
AWS experience – ECS, Lambda, RDS/Aurora, ElastiCache, S3, Serverless, etc.
API design mastery – RESTful patterns, versioning, authentication, rate limiting
Production mindset – monitoring, logging, error handling, graceful degradation
Nice to Have
Vector/Graph databases and embeddings for semantic search
Terraform for IaC
Trading/financial domain experience
Message queues (SQS, Redis Streams, Kafka)

Who You Are
Ownership mentality: You don’t wait to be told what to do. You identify problems and fix them.
Fast learner: New domain? New tool? You figure it out quickly and apply it.
Pragmatic: You ship working software. You know when to over-engineer and when to keep it simple.
Collaborative: You communicate clearly, document decisions, and help teammates grow.
Startup-ready: You thrive in ambiguity, context-switch effectively, and move fast without breaking things.

Tech Stack

Language |  Python 3 , async/await throughout
Framework |  FastAPI, Pydantic, SQLAlchemy
Database |  PostgreSQL, Redis
Infrastructure
AWS ECS, Lambda, RDS, ElastiCache,
DevOps
Docker, GitHub Actions, Terraform
Observability
Opentelemetry , AWS CloudWatch, Slack webhooks.

Why Join Us
High impact: Your work directly shapes the product and architecture
Ownership: Lead technical decisions, not just implement tickets
Growth: Learn AI/ML integrations, financial systems, and scale challenges
Speed: Ship weekly, iterate fast, see your code in production immediately

What We Offer

Remote Work: 100% remote work
Competitive Salary: Industry-competitive salaries
Equity: Equity package
Holidays: 24 days holiday + local public holidays

About DealSize.ai

DealSize.ai is a cutting-edge web application designed to provide real-time trading insights and analysis to retail investors in the stock market. With its advanced AI technology, it offers tailored trading ideas that cater to individual users’ preferences and needs. The platform covers a wide array of assets, including stocks, currencies, commodities, and cryptocurrencies. Preview our website at www.dealsize.ai

At DealSize.ai, we are committed to diversity, equity, and inclusion. We value the unique contributions of each team member, embracing differences in backgrounds and perspectives. We are an equal opportunity employer, ensuring all employees and job applicants are treated fairly and with respect, without regard to any protected characteristics. Our dedication to fostering a diverse and inclusive environment is integral to our success.

About Our Team

Fueled by experts, we are a close-knit team of problem solvers, on a mission to build the people’s first choice for fintech AI.

Tagged as: 5 years, docker, Equity, Python