Jobs Python

We’re looking for a Senior Engineer who thrives on unfamiliar problems — someone who can land in a customer’s environment, reverse-engineer poorly-documented vendor APIs, and ship a working integration end-to-end, solo.

What makes you a great fit:

• 5+ years of professional software development experience, including 3+ years of hands-on experience in Python.
• Proven track record in designing and building integrations against third-party REST APIs.
• Comfortable working in unfamiliar codebases and picking up new stacks as engagements demand.
• Upper-intermediate written and spoken English.
• Self-managed in an async remote setting — strong ownership, communication, and time management.
• Curiosity and dive-deep mentality — comfortable when documentation is incomplete or absent.

• AI-as-tool fluency — productive use of Claude code, Copilot, Cursor, or similar for research and implementation.

   

Will be a plus:

• Prior customer-facing engineering experience (joining technical calls, gathering requirements).
• Familiarity with security products (SIEM, EDR, vulnerability management, threat intel, firewalls, etc.).

• Experience working in or alongside a SOC.

   

Why work with us?

• People-first management with minimal bureaucracy
• A friendly company culture, proven by employees who choose to return
• Flexible working hours
• 29 days of PTO (18 working days per year, plus all national holidays)
• 10 paid recovery days
• Full financial and legal support for independent contractors
• Free English classes, with native speakers or Ukrainian teachers

• Dedicated HR support

   

Your day-to-day in this position:

• Design and build bespoke integrations between our products and customer-specific security stacks — primarily in Python, occasionally in whichever stack the engagement demands.
• Tackle the hardest integration problems: the non-conventional, “out-of-the-books” engagements that standard product connectors can’t cover.
• Own each engagement end-to-end — discovery and technical scoping through implementation, testing, and handover.
• Join customer technical calls alongside PM/CSM to sharpen requirements; drive written follow-up between sessions.
• Reverse-engineer poorly-documented vendor APIs and build robust integrations against them.

• Capture learnings from each engagement and feed them back to the product and integration teams so the next engagement is easier.

   

What is your new project?

• Domain: Computer and network security
• Location: Israel
• Company size: 51-200 employees
• Founded in: 2009
  
  Our next steps:

✅ Intro call with a Recruiter — ✅ Tech livecoding interview — ✅ Tech theoretical + system design interview — ✅ Managerial interview — ✅ HR client interview — ✅ Reference check — ✅ Offer

📍 Location: EU only
🕒 Full-time | Long-term project (initially 6 months+)
🕘 Working hours: 9:00–18:00 CET
 

We’re looking for a strong Senior NLP & Python Developer to join an innovative AI-powered healthcare product focused on clinical trial automation and protocol intelligence.

The product is a next-generation Clinical Trial Management System (CTMS) that uses AI to analyze complex medical protocols (100–400+ page documents) and transform them into structured, executable workflows for research sites and clinical operations teams.

You’ll work on advanced NLP/RAG pipelines, scalable backend architecture, and AI systems that must meet strict healthcare compliance and auditability requirements.

What you’ll work on

• Designing and optimizing RAG pipelines for medical protocol parsing
• Building AI-powered extraction systems using LangChain, LangGraph, LLMs, and VLMs
• Improving AI traceability, reproducibility, and deterministic outputs
• Developing scalable backend services with FastAPI and PostgreSQL
• Working with vector databases (pgvector) and embedding pipelines
• Implementing document classification and extraction workflows
• Enhancing observability, validation, monitoring, and testing
• Supporting validation-ready and compliance-oriented architecture
• Improving performance and scalability of AI/ML infrastructure

Tech Stack

• Python 3.14
• FastAPI
• SQLModel / SQLAlchemy / Pydantic v2
• PostgreSQL + pgvector
• LangChain / LangGraph
• Docker / Docker Compose
• Celery
• Redis
• RabbitMQ
• NLP / LLM / VLM pipelines

Requirements

• 5+ years of commercial Python development experience
• Strong experience with FastAPI and SQLAlchemy
• Deep knowledge of PostgreSQL (schema design, indexing, optimization)
• Experience with Docker and microservice architecture
• Hands-on experience with LangChain and RAG systems
• Experience with vector databases (preferably pgvector)
• Strong understanding of embeddings, prompt engineering, and AI orchestration
• Experience with Celery, Redis, RabbitMQ
• Practical experience with document extraction / NLP systems
• Experience working in regulated industries (healthcare, fintech, life sciences, etc.)
• Strong architectural and system-design mindset
• Upper-Intermediate+ English

Nice to have

• Experience with GxP or healthcare-compliant AI systems
• Experience with AI explainability and auditability
• Familiarity with Ruff, Poetry, pre-commit hooks
• Experience scaling AI-heavy platforms

Team

You’ll collaborate with:

• ML Architect
• Senior ML/Python Engineer
• Frontend Engineer
• QA Engineer
• BA & PM

This is a high-impact role where you’ll directly influence the architecture of a complex AI healthcare platform.

📩 If you have strong Python + NLP/RAG expertise and want to work on meaningful AI systems in healthcare — apply now.

Senior Python Engineer (AI-driven Recommendation Platform, iGaming domain)

About the Product

We are developing an AI-powered performance optimization platform for online casinos and sportsbooks. The solution helps operators improve key business metrics by increasing player engagement and loyalty through personalized recommendations and predictive analytics.

The platform collects and processes player behavior data across multiple systems, builds detailed user profiles, and generates actionable insights, including:

• identifying players who misuse bonus programs without long-term retention
• detecting patterns of risky or excessive gaming to support responsible play
• recommending relevant games and activities based on user preferences and behavioral history

You will join a team building scalable recommendation systems, working with large volumes of data, and implementing ML-driven personalization to enhance user experience within iGaming products.

Requirements

• 5+ years of backend development experience with Python
• Strong foundation in mathematics, statistics, or computer science
• Hands-on experience with FastAPI, Django, or Flask
• Solid knowledge of data structures, algorithms, and distributed systems
• Experience with SQL and NoSQL databases (PostgreSQL, Redis, DynamoDB, MongoDB, etc.)
• Practical experience with Kafka or RabbitMQ and asynchronous architectures
• Cloud experience with AWS (Lambda, S3, RDS, SQS, etc.)
• Experience designing and maintaining high-load, scalable systems
• English level — B2 or higher

Nice to Have

• Experience with recommendation systems, data analysis, or ML-based personalization
• Understanding of data pipelines and ETL processes
• Experience with Kubernetes, Docker, and CI/CD pipelines
• Familiarity with Elasticsearch and monitoring/visualization tools (Grafana, Kibana)

Responsibilities

• Design and develop scalable backend services for AI-powered recommendation systems
• Collaborate with data scientists and ML engineers to deploy models into production
• Optimize data storage, processing, and retrieval for large-scale user datasets
• Ensure system reliability, performance, and scalability
• Take part in architectural discussions, code reviews, and mentoring
• Contribute to new features aimed at increasing player engagement and retention

Tech Stack

Python, FastAPI, Django, Flask, Kafka, RabbitMQ, PostgreSQL, Redis, DynamoDB, AWS (Lambda, S3, RDS, API Gateway, CloudWatch), Kubernetes, Pandas, NumPy, SQLAlchemy, Celery, Elasticsearch, Prometheus, Grafana.

MTicket is building a production AI runtime on top of a real ticketing and live events business.
This is not a chatbot wrapper, not a demo, and not a pet project.
Our systems operate around real-world workflows: ticket sales, payments, stadium shows, scanners, live event operations, approvals, and time-sensitive business processes.
We are looking for a strong Senior Python Backend Engineer who can build reliable AI-powered infrastructure in production.

 

What you’ll build

You’ll work on the core AI runtime layer, including:
 

• Async AI workers and orchestration runtime
• Event-driven pipelines and queue processing
• LLM integrations with OpenAI / Anthropic
• LLM proxy layer and structured output validation
• Retries, timeouts, DLQ and failure handling
• RAG pipelines, pgvector and vector search
• Approval flows and human-in-the-loop workflows

• Observability, tracing and production debugging

   

Tech stack

Python, FastAPI, LangGraph / LangChain or similar orchestration runtimes, OpenAI / Anthropic, PostgreSQL, pgvector, Kafka / SQS / RabbitMQ / Redis, OpenTelemetry, AWS, Docker.

 

Must have

• Senior-level production Python experience
• Strong FastAPI and async Python skills
• Experience with event-driven systems: queues, workers, retries, DLQ
• Solid PostgreSQL experience
• API integrations in production
• Production debugging experience
• Understanding of observability, tracing and monitoring
• Ability to own complex backend systems end-to-end

• Ukrainian or Russian language proficiency at C1 level.

   

Strong plus

• LLM pipelines in production
• LangGraph, LangChain or other orchestration runtimes
• RAG, embeddings, pgvector or vector search
• OpenTelemetry
• Structured outputs and JSON schema validation
• Kafka, SQS or RabbitMQ

• Experience with payments, ticketing, marketplaces, live events or operational workflows

   

First 90 days

In your first 90 days, you will:
 

• Build async worker infrastructure
• Implement the orchestrator runtime
• Integrate the LLM proxy layer
• Build validation pipelines
• Connect telemetry, tracing and observability

• Ship the first operational AI workflows into production

   

What you’ll get

• Architectural ownership from day one
• Real production AI systems, not demos
• Direct impact on AI runtime architecture
• Strong engineering culture
• Fast decision-making and close collaboration with leadership

• Remote work from anywhere 

   

This role is a great fit for an engineer who wants to build real AI infrastructure: queues, workers, orchestration, observability, validation, production reliability and systems that directly affect live business operations.

We’re looking for a Senior Backend (Python) Engineer to join our team. 

Work Location: Poland (Krakow), Slovakia (Kosice) or Czechia (Prague). 

Hybrid: 2+ days per week in the office, the rest remote.

The Mission

We are building a complex, real-time ecosystem for micromobility and logistics systems sim—where split-second logistics meet seamless user experiences. We need a Senior Backend (Python) Engineer powerhouse to lead the development of our Customer Mobile Web App and our high-utility Internal Admin Panels.

You’ll be the bridge between the sleek, high-performance interface our users see and the robust, scalable Python services that power the logic.

Key Responsibilities

• Mobile-First Frontend: Architect and scale our React-based mobile web application, ensuring 60fps performance and offline-first capabilities.
• Operational Control Centers: Build dense, data-heavy Admin Panels that allow our operations team to monitor real-time logistics, manage users, and handle complex dispatching.
• Scalable Backend: Design and maintain performant APIs using Python (FastAPI/Django) to handle high-concurrency event streams.

• End-to-End Ownership: From database schema design to CSS transitions, you’ll own the entire feature lifecycle.

   

Who You Are

• The Architect: You don't just "write code"; you design systems. You understand how a change in a Python microservice ripples out to the React frontend.
• UX Enthusiast: You understand that an Admin Panel requires different UX "muscle" (efficiency and density) than a mobile app (simplicity and speed).
• Problem Solver: You’ve dealt with the "hard stuff"—real-time GPS tracking, race conditions in booking logic, or complex state management.
• Pragmatist: You balance the need for clean, tested code with the reality of shipping features in a fast-paced environment.

Will be plus Led transformation of standalone product into scalable SaaS platform.

Why Join Us?

Work on a product with immediate, real-world impact.

A "no-red-tape" environment where your architectural decisions stick.

Layer Technology

Frontend - React Native Expo, Styled Components, Mobx/Redux, WebSockets. Experience with Firebase, Expo SDK, Expo Modules.

Backend-  Python (FastAPI / Django / Flask)

Database - PostgreSQL, Redis (for real-time caching)

Infrastructure - AWS/GCP, Docker, Kubernetes

Real-time-  WebSockets / Socket.io (for "Uber-style" live tracking)

Requirements & Skills - 

• Proven experience in Python and backend development using FastAPI, Django, or Flask.
• Strong understanding of geospatial data structures (GeoJSON, latitude/longitude).
• Understand principles of cloud native development
• Usage of docker for development environment
• Familiar with Kubernetes (application lifecycle and environment)
• Familiar with Helm charts (their maintenance and usage)
• Familiar with ArgoCD, Grafana, Github
• Nice to have - familiarity with helmfile

Required Skills

• 5+ years of experience with Python, primarily in backend development
• Python: Advanced
• FastAPI / Django / Flask

Language Skills

English: Upper intermediate (B2)

We offer

• Challenging and rewarding tasks with autonomy in a distributed international team
• Motivated colleagues who foster a collaborative environment
• Competitive salary based on your experience and expertise
• 20 vacation days + state holidays + your birthday off (for full-time employees)
• Sick leave coverage (5 days for full-time employees)
• Opportunities for regular business trips abroad

Important: after confirming your application on this platform, you’ll receive an email with the next step: completing your application on our internal site, LaunchPod. So keep an eye on your inbox and don’t miss this step — without it, the process can’t move forward.

Why join us

If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :)

About the role

Join as a Senior Backend Developer (AdTech) to help build a next-generation advertising platform powered by scalable backend systems, real-time data processing, and distributed architectures. You will work with technologies such as Python, Django, Kubernetes, PostgreSQL, and AWS while contributing to technical direction and engineering standards in an early-stage environment. This role offers strong ownership, collaboration with experienced engineers, and the opportunity to create products used by millions of people.

What you will do

• Architect, build, and evolve core systems for the Ads platform;
• Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting;
• Build and optimize high-throughput, low-latency systems processing large volumes of events and data;
• Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements;
• Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity;
• Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions;
• Provide technical leadership through design reviews, system discussions, and mentoring other engineers;
• Contribute to engineering best practices, documentation, and long-term platform vision;
• Participate in hiring and help grow a strong, high-performing team.

Must haves

• 5 years of software development experience building scalable systems (backend programming languages/frameworks, e.g. Java, .NET, Python, Node.js etc);
• Experience with AdTech;
• Experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows;
• Deep understanding of computer science fundamentals (algorithms, data structures, networking, databases);
• Proven experience designing and scaling distributed systems focusing on performance, observability, and fault tolerance;
• Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems;
• Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board;
• Exceptional ownership mindset — you drive initiatives forward, raise the bar, and deliver lasting impact;
• Excellent communication and cross-functional collaboration skills;
• Comfortable operating in a fast-paced, high-autonomy, product-driven environment;
• Experience with e-commerce and catalog management is preferred;
• Familiarity with Python, Django, Kubernetes, PostgreSQL, AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome;
• Upper-intermediate English level.

Nice to haves

• Strong experience with complex ETL flows and high-throughput systems is highly preferred.

   

The benefits of joining us
 

• Professional growth

Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps
 

• Competitive compensation

We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities

• A selection of exciting projects

Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands
 

• Flextime

Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive.
 

Meet Our Recruitment Process

Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback:

• Short online form to confirm basic requirements
• 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process.
• 5-minute introduction video

Synchronous stage – Live interviews

• Technical interview with our engineering team (scheduled at your convenience)
• Final interview with your future teammates

If it’s a match — you’ll get an offer!

We are looking for a Middle Full-Stack Software Engineer with hands-on experience in TypeScript, React/Next.js, and practical experience working with Python-based backend services.

The ideal candidate is comfortable owning features end to end — from frontend implementation and user-facing flows to backend services, APIs, integrations, and production support. 

This role is a good fit for an engineer who enjoys working across the stack, solving complex integration challenges, and contributing to a product in the AI communication space. 

The position is slightly frontend-leaning, but still requires the ability to read, write, and maintain backend services. 

CUSTOMER 

The customer is a product company developing a platform for automating customer communications using AI-based solutions. 

The team is small, fast-scaling, and operates with a low level of bureaucracy. The role involves direct communication with the customer team and a strong ownership-oriented engineering culture. 

The project is in an active development phase. The candidate will work on frontend features, backend services, external provider integrations, and contribute to the ongoing development of the existing platform. 

PROJECT 

The project is an agentic call center platform that uses Voice and Text AI agents to conduct real customer conversations, automate workflows, and integrate with CRMs and telecom providers. 

The platform helps businesses automate customer communication at scale, including bookings, call transfers, CRM workflows, messaging, and routing. 

From a technical perspective, the project is interesting because it includes frontend development with React/Next.js, backend services in Python, GraphQL APIs, real-time voice AI workflows, integrations with external providers, MongoDB, Aurora, RabbitMQ, Redis, Docker/ECS, and a future migration toward Kubernetes. 

Key Technologies 

TypeScript, React, Next.js, GraphQL, Apollo, Python, MongoDB, Aurora / PostgreSQL, RabbitMQ, Redis, Docker, ECS, Kubernetes, AWS, AI/LLM integrations, real-time voice AI. 

RESPONSIBILITIES 

• Develop and maintain full-stack features in a production environment.  
• Build user-facing functionality using TypeScript, React, and Next.js.  
• Work with server-side rendering and general Next.js patterns.  
• Build, consume, and maintain GraphQL APIs, ideally using Apollo.  
• Read, write, and maintain backend services in Python.  
• Contribute to API design, data modeling, and service-to-service communication.  
• Support integrations with CRMs, telecom providers, and AI-related vendors.  
• Work with MongoDB and Aurora / PostgreSQL for data storage.  
• Participate in debugging across the stack — from browser DevTools to backend logs.  
• Work with Docker and containerized deployments.  
• Contribute to CI/CD improvements, deployment safety, logging, monitoring, and observability.  
• Help keep production services stable, reliable, and easy to support.  
• Communicate directly with the customer team and take ownership of tasks from start to finish.  

REQUIREMENTS 

• 3+ years of full-stack engineering experience, preferably with a frontend focus.  
• Experience owning features end to end in a production environment.  
• Good working knowledge of TypeScript.  
• Strong experience with React and Next.js.  
• Familiarity with server-side rendering and general Next.js patterns.  
• Experience working with GraphQL, ideally Apollo.  
• Ability to build and consume GraphQL APIs.  
• Comfortable working with Python: able to read, write, and maintain backend services.  
• General understanding of backend fundamentals: API design, data modeling, and how services communicate with each other.  
• Experience with Docker and containerized deployments.  
• Experience with MongoDB or a relational database such as PostgreSQL / Aurora.  
• Understanding of basic schema design and ability to write reasonable queries.  
• Ability to debug across the stack, from frontend issues to backend logs.  
• Interest in production topics: logging, monitoring, reliability, and service health.  
• Proactive communication and ability to take a task and drive it without constant hand-holding.  
• Comfortable working in a small team with direct customer communication.  

WILL BE A PLUS 

• Experience with Python backend services in production.  
• Exposure to messaging systems such as RabbitMQ or similar tools.  
• Experience with Redis or other caching tools.  
• Experience with real-time systems: telephony, WebSockets, streaming, low-latency pipelines.  
• Familiarity with vendor orchestration patterns: fallback routing, provider selection.  
• Any Kubernetes experience, even in dev/staging environments.  
• Experience with AI/LLM, TTS/STT, or voice-related systems.  
• Exposure to security/compliance concepts: SOC 2, secrets management, audit trails.  

PERSONAL PROFILE 

• Proactive and ownership-driven mindset.  
• Comfortable working across frontend and backend.  
• Enjoys solving complex product and integration challenges.  
• Interested in AI-driven communication products.  
• Strong problem-solving skills.  
• Effective communicator in distributed and small teams.  
• Able to work independently and clarify requirements when needed. 

Are you looking for a dynamic role where you can sharpen your web scraping skills and work with modern technologies? Then this opportunity is for you!

We’re a data-driven team building tools for data collection and analysis, and we’re currently looking for a Python Developer to join us.

🛠️ What You’ll Work With:

• Web scraping tools & libraries: Scrapy, Requests, BeautifulSoup4, Selenium or Playwright
• Working with databases using SQL
• Version control: Git
• Containerization: Docker
• Web frameworks (basic knowledge is enough): Django, FastAPI, or Flask

🌍 Requirements:

• Solid experience with Python and web scraping tools
• Understanding of SQL and Git
• Basic knowledge of Docker and web frameworks
• English level: B1 or higher

✨ What We Offer:

• Competitive salary
• A modern office in Kyiv
• Corporate taxi for safe and easy commuting
• Remote-friendly culture — work from wherever you're most productive
• A talented and supportive team
• Real impact on the product and its development

📩 Interested?
Send us your CV and let’s build something great together!

About the company

codeIMPL was launched in 2018 with a large knowledge and experience in mobile development.
Since that we help businesses and individuals establish their presence on any modern device and
platform — mobile, web, etc.

Our clients are large worldwide companies, that develop important and significant solutions in
FinTech, Blockchain, DeFi, Health & Fitness, Gambling domains.
In codeIMPL we use modern, innovative technologies and approaches that allow us to support any
solution and provide the foundation for its future scaling and enhancement.

About the product
Project: fintech, payment system.

Responsibilities
● Develop and maintain asynchronous backend services (FastAPI, ARQ, service-oriented and
microservice applications).
● Write clean, testable, and maintainable code.
● Participate in design discussions and suggest improvements to performance and developer
experience.
● Collaborate openly with backend, frontend, DevOps, and product teams.

Requirements
● 3+ years of hands-on experience with Python (asyncio, typing, pydantic);
● Solid experience with SQLAlchemy 2.0 and Alembic;
● Proficiency in writing unit and integration tests (Pytest/Unittest);
● Hands-on experience with FastAPI and async task processing (ARQ/Celery/RQ);
● Database skills: PostgreSQL (indexes, transactions, RLS). Knowledge of
TimescaleDB/ClickHouse is a plus;
● Experience in database query optimisation (EXPLAIN, keyset pagination, batching);
● Understanding of idempotency and outbox/event sourcing principles;
● Experience with Docker, docker-compose, local environments;
● Basic knowledge of Kubernetes and AWS (SQS, RDS, S3) is a plus;
● Hands-on experience with creating and supporting PCI DSS compliant applications is a plus;
● Experience in creating skills, commands and agents for Claude AI is a plus;

● Understanding of observability (structured logs, traces, metrics).

We offer:
● Full-time remote job;
● Paid annual leave;
● Work with professional team and friendly atmosphere;
● Minimum of bureaucracy.

🚀AIMPROSOFT — Senior Python Developer!    

Aimprosoft, a fast-growing IT company, is looking for a Senior Python Engineer on a contract basis ( ≈ 6-12 months) for an international HealthTech project focused on workforce management solutions for the US healthcare industry. 

This is a senior hands-on role for an engineer who is ready to take ownership of complex backend flows, stabilize an existing production system, and help deliver business-critical payroll and instant-payment functionality. 

🎯About the project & role: 

You will join a HealthTech workforce management platform that connects healthcare facilities and medical staff across the US. 

The platform ecosystem includes: 

• Django/Python backend (monolithic architecture) 
• React.js web application 
• Native iOS & Android mobile apps 
• Payroll and instant-payment infrastructure 

The product already has a complex production environment and requires a senior engineer who is comfortable working with legacy code, incomplete documentation, and critical business flows where reliability and data accuracy are essential. 

The current backend is built with Django, but the team is open to future architectural improvements and technology evolution — giving engineers real influence on how the platform grows moving forward 

🔥What We Need From You: 

• 5+ years experience with Python; 
• Strong experience with Django; 
• English: Upper-Intermediate (B2) or higher for communication with international teams; 
• Experience working with complex production systems and legacy codebases; 
• Experience working with IAM, EKS, ECS, ECR, Code Pipeline (CodeBuild, CodeDeploy), Load Balancer, RDS, Cloudwatch, Secrets Manager; 
• Ability to take ownership and make careful engineering decisions; 
• Strong debugging, troubleshooting, and problem-solving skills; 
• Experience with business-critical flows where reliability and data correctness are essential; 
• Ability to analyze undocumented functionality and stabilize existing systems; 
• Experience working in Agile / Scrum environments; 
• Practical understanding of testing, release validation, and production-readiness processes; 

• Experience improving code quality and system maintainability. 

   

📌Nice to have: 

• Understanding of payroll calculations and payment processing systems; 
• Experience in HealthTech or healthcare-related products; 
• Familiarity with payroll, shift completion, or time-card workflows; 
• Experience with Vertex, Treasury Prime, or similar financial/payment tools; 
• Experience with risk mitigation and stabilization strategies for production systems; 
• Previous experience working in remote international teams; 
• Experience supporting mobile + web integrated ecosystems; 

• Bachelor’s or Master’s degree in Computer Science or related field. 

   

💼What We Offer: 

• Official military deferment (reservation); 
• A competitive salary that appreciates your skills and experience; 
• High-impact role with strong technical ownership and influence on product stability; 
• Remote-first culture with flexible collaboration; 
• Opportunity to improve architecture, processes, and engineering quality standards; 
• Cozy atmosphere and modern approaches — no unnecessary bureaucracy or micromanagement; 
• Ability to implement your own ideas, tools, and technical improvements. 

We are looking for a skilled Python Software Engineer to join our team and work on building scalable backend systems, including inventory management solutions.  

Responsibilities 

• Develop and maintain backend services 
• Design and implement REST APIs 
• Write and maintain unit and integration tests 
• Work with relational databases and optimize queries 
• Ensure code quality and follow best practices 
• Collaborate with cross-functional teams 

Required qualifications

Strong experience with Python (3.10+/3.11+) 

• Experience with Flask or similar frameworks 
• Understanding of async programming (asyncio) 
• Experience with Celery or background job processing 
• Hands-on experience with SQLAlchemy 
• Solid knowledge of PostgreSQL (query writing & optimization) 
• Experience with Redis 
• Basic experience with Docker and containerization 
• Familiarity with Linux CLI tools 
• Experience with unit and integration testing 

Whould be an advantage

• Experience with Swagger / OpenAPI 
• Knowledge of RBAC / access management systems 
• Understanding of messaging protocols (e.g., MQTT) 
• Experience with configuration management tools (Ansible, Salt) 
• Experience with performance profiling 

What We Offer

• Opportunity to work on cutting-edge embedded products
• Competitive salary and benefits
• Flexible working model (remote / hybrid / onsite)
• Professional growth and learning opportunities
• Collaborative and engineering-focused culture

Company Description

Are you a seasoned engineer passionate about building scalable, high-performance systems? This Senior-level role offers the opportunity to work remotely with talented teams across Europe, Ukraine, and LATAM.

At Sigma Software, we deliver cutting-edge solutions for global customers, combining technical excellence with a service-minded approach. In this role, you will join a distributed team to architect and evolve an advanced Ads platform, contributing to both innovation and stability.

Why join us? You will work on complex, high-impact systems, collaborate with international experts, and enjoy the freedom to shape architecture and technical patterns that drive long-term success.

CUSTOMER

We partner with a leading company in the AdTech space, delivering high-performance, scalable solutions that empower advertisers to manage campaigns, optimize targeting, and analyze results in real time. The Customer values innovation, reliability, and long-term collaboration, and operates globally with distributed teams in Europe, LATAM, and other regions.

PROJECT

The project focuses on building and evolving core systems for an advanced Ads platform integrated into a product for the interior decor industry. This product enables users to preview and visualize home items before purchase, enhancing shopping experiences both online and in-store.

Job Description

• Design, develop, and maintain APIs and services supporting ad campaign management, targeting, delivery, attribution, and reporting
• Architect scalable, reliable, and high-performance distributed systems
• Optimize systems for high-throughput and low-latency event/data processing
• Drive architectural decisions and establish development patterns
• Collaborate with distributed teams to ensure seamless integration and delivery
• Mentor and guide other engineers, fostering technical excellence

• Ensure code quality, maintainability, and alignment with long-term product goals

   

Qualifications

• At least 5 years of commercial experience in building scalable, high-performance systems
• Hands-on experience with AdTech solutions such as DSP, SSP, ad exchange, prebid, Google Ad Manager, or openRTB
• Strong proficiency in Python, preferably with the Django framework
• Solid knowledge of computer science fundamentals, including data structures, algorithms, and distributed systems
• Good understanding of distributed system architecture with a focus on data availability, reliability, and performance
• Practical experience with Kubernetes, PostgreSQL, and AWS

• Upper-Intermediate level of English

   

WILL BE A PLUS

• Experience with dbt and Redshift

• Familiarity with interior decor industry solutions

   

Additional Information

PERSONAL PROFILE

• Attention to detail and quality
• Excellent communication skills
• Leadership mindset, proactiveness

About the Company

We are building AI systems that combine multilayered, scalable knowledge graphs with advanced reasoning agents to analyze and understand highly complex knowledge domains with scholarly precision.

The Role

We are seeking a Senior Backend Engineer with 7+ years of experience to design and scale the backend infrastructure powering our AI platform.

Key Responsibilities

• Architect and implement scalable backend services and multi-tenant SaaS systems
• Design and operate high-throughput data pipelines (batch and streaming)
• Build APIs and services integrating LLM inference, retrieval systems, and knowledge graphs
• Productionize research-grade AI systems into reliable distributed systems

Required Qualifications

• 7+ years of backend engineering experience
• Strong experience with data pipelines and SaaS architectures
• Strong proficiency in Python
• Deep understanding of distributed systems and cloud-native environments
• Experience in architecture, development and deployment of Kubernetes based systems
• Fluent English

Preferred Qualifications

• Go and/or Scala experience
• Hands-on experience with LLM systems (RAG, model serving, evaluation)
• Experience with knowledge graphs, vector databases, or hybrid retrieval architectures
• MS in Computer Science

What We Offer

Technical Innovation: Lead novel neuro-symbolic architectures with cutting-edge research access

Work Environment: Flexible arrangements, international travel opportunities

We at Sigma Software are looking for a Middle Python Developer to join an exciting project for a global telecommunications leader.

This is a full-time position based in Ukraine with the flexibility of remote work. You will be part of a skilled Agile team building a high-impact web application that manages and tracks hardware inventories for millions of users.

At Sigma Software, we value innovation, professional growth, and work-life balance. You’ll enjoy working in a collaborative environment and contributing to impactful solutions.

Customer

Our customer is a leading telecommunications company recognized for delivering innovative, large-scale technological solutions. Operating globally, they provide advanced communication services and infrastructure to millions of users and businesses. Known for their commitment to cutting-edge technology, scalability, and reliability, they offer a dynamic and forward-thinking work environment.

Project

The project involves developing a web application to manage and track customers’ hardware inventories. It supports the full lifecycle of hardware contracts and products, enabling efficient reporting, monitoring, and operational control. The application integrates with existing systems, leverages modern frameworks, and follows SAFe Agile methodology to ensure high-quality delivery.

Key Technologies: Python, Django, Django REST Framework, PostgreSQL, Celery, AWS, Unix, Bash, Angular/React

Requirements

• 5+ years of experience in Python
• Practical expertise with Django, Django REST Framework (DRF), and Django ORM
• Solid understanding of PostgreSQL
• Experience writing unit tests using Python’s testing frameworks (e.g., TestCase)
• Familiarity with Celery for task scheduling and asynchronous processing
• Experience with AWS and Unix-based systems
• Bash scripting skills
• Experience with Angular or React
• At least Upper – Intermediate level of English

WILL BE A PLUS

• Experience with microservices architecture
• Knowledge of Docker/Kubernetes
• Familiarity with CI/CD pipelines
• Understanding of telecom industry specifics

Personal Profile

• Proactive and detail-oriented
• Strong communication skills
• Ability to work effectively in distributed teams
• Adaptable and open to feedback
• Collaborative mindset

Responsibilities

• Design and implement well-structured, maintainable, and robust code solutions
• Develop new features and components, perform refactoring, debugging, and ongoing maintenance
• Conduct peer code reviews and adhere to established engineering practices
• Perform unit and integration testing to ensure code quality
• Analyze requirements and prepare detailed technical designs for features
• Create and maintain technical documentation
• Participate in customer meetings, including conference calls and face-to-face sessions
• Actively contribute to SAFe Agile ceremonies, including estimation, grooming, and planning sessions

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

AI & Automation

• Strong understanding of AI-powered development workflows and modern AI tools
• Experience using AI-assisted coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor, and Lovable
• Ability to leverage AI tools to improve development speed, debugging, documentation, testing, and code quality
• Understanding of AI integrations, LLM APIs, prompt engineering, and AI-assisted automation workflows
• Experience working with AI-generated code while maintaining high standards for security, scalability, and maintainability