Jobs Python

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

Our client is an early-stage startup that solves major challenges in the worlds of Blockchain, Crypto, and Web3. If you are passionate about blockchain and cybersecurity, looking for a challenging and rewarding opportunity to work with a dynamic and innovative team, we encourage you to apply.

We are looking for an outstanding Senior software engineer to join us! As a senior software engineer and part of our agents team, you will be able to contribute to the core logic of our system by leveraging Web3 data into actionable risk insights

By joining us you will get the opportunity to be part of the early stages of product building - Contribute, innovate, evolve, and become a key player as part of our top talented team members.

Requirements
B.Sc in Computer Science or equivalent.
Can-do attitude, excellent communication skills and a team player
5+ year of experience with Python/Java
Experience with Web3 ecosystem & DeFi protocols - big advantage
Experience with a cloud platform (e.g. AWS)
Experience with SQL databases. PostgreSQL - advantage
Familiarity with CI/CD methodologies & relevant tools.
Experience in git flows.
Experience working in a small startup - advantage
Experience working close with designers or product - advantage

About the Project

AI Interview Platform (client name undisclosed) — a leading technical interviewing platform used by fast-growing startups and large enterprises worldwide. It pairs experienced engineers with standardized interview frameworks to enable fair, high-signal, and scalable hiring for software engineers globally.

What You'll Do

• Conduct live technical interviews with software engineering candidates worldwide via the platform.
• Assess coding skills, problem-solving abilities, technical knowledge, and communication while creating a professional and inclusive candidate experience.
• Provide structured, objective feedback based on established evaluation criteria to reduce bias and improve hiring quality.

• Collaborate with the client’s team to test, refine, and improve interview content, processes, and platform features.

   

Must Have

• 4+ years of professional experience as a Software Engineer/Developer.
• Strong Python proficiency
• Working knowledge of frontend technologies (JavaScript, React, or similar).
• Solid understanding of algorithms, data structures, and software engineering fundamentals.
• Excellent English communication skills (spoken and written).
• Professional demeanor, ability to deliver objective assessments, and reliable setup (webcam, microphone, stable internet).

Nice to Have

• Prior experience conducting technical interviews (DS&A, system design).
• Mentoring, coaching, or technical leadership experience.
• Interest in talent assessment, interviewing best practices, or inclusive hiring.

Location: EU / Remote (Ukraine)

Type: Freelance full-time (first 3 months), with option to go part-time later.

We build internal products and automation for our own teams to improve day-to-day business processes. Most tasks revolve around processing large datasets (millions of rows) and turning them into reliable, reusable outputs.

You'll work 50/50 between Python development and data work: building scripts/services and data pipelines, mainly with Pandas, plus some SQL and PySpark.

    What You'll Do

• Build internal tools and automation around data processing and reporting.
• Develop and maintain pipelines that ingest data from APIs and large files.
• Transform and validate data using Pandas; write clean, tested, maintainable Python.
• Use SQL mainly to extract data and for joins/aggregations when needed.
• Contribute to large-scale processing (PySpark/Spark) when applicable.

• Refactor and optimize existing scripts and pipelines; improve performance, readability, and reliability (tests/logging).

   

    What We're Looking For

• 2+ years of experience with Python in production.
• Strong Pandas: efficient transformations, joins/merges, memory/performance considerations.
• Solid engineering habits: tests, code review, debugging, and readable code.
• Working knowledge of SQL (MS SQL Server is our primary DB, but any RDBMS is fine).
• Comfortable with Linux and Git; daily tooling skills (e.g., VS Code).
• Excellent organizational and task management abilities.
• Self-motivated with the ability to work independently.
• Good written and spoken English communication skills.

    Nice to Have

• PySpark/Spark and/or Hadoop exposure; distributed processing concepts.
• Azure experience (storage/compute) or participation in on-prem → cloud initiatives; workflow orchestration is a plus.
• Data modeling fundamentals and basic ML understanding; а portfolio (GitHub/website) or examples of end-to-end projects/products (clean repo structure, README, tests) is a plus.

We are looking for a Python Developer (Strong Middle to Senior) who is ready to scale and grow with us.
 

If you’re passionate about clean code, scalable backend architecture, and excited to build something impactful, we’d love to meet you!
 

What will you do?
 

• Contribute to the full backend lifecycle, from architecture design to production deployment;
• Design, develop, and maintain RESTful APIs using Python, Flask, FastAPI, and SQLAlchemy;
• Implement microservices architecture with message brokers and API gateways;
• Implement authentication and authorization with industry-standard encryption and access control;
• Optimize backend services for performance and efficiency, identifying bottlenecks and implementing solutions to improve response times and resource utilization;
• Implement complex algorithms and data structures to handle data processing, operations research (OR), recommendation systems, and optimization problems;
• Deploy and scale services on GCP (Cloud Functions, Cloud Run, Kubernetes); containerize with Docker;
• Design and optimize database schemas using PostgreSQL/MySQL and integrate Pandas/NumPy for analytics and ML;
• Document API specifications using OpenAPI (formerly Swagger);
• Collaborate with frontend, data science, and DevOps teams to align backend with product goals;
• Maintain engineering standards through code reviews, documentation, and knowledge sharing.
 

Requirements:
 

• 4+ years of commercial experience in backend development with Python;
• Upper-Intermediate English (B2 or C1) for comfortable verbal team communication.
• Strong hands-on experience with Python, Flask, and SQLAlchemy, including database optimization;
• Proficiency with Docker and Kubernetes;
• Expertise in software architecture and design patterns, with a proven track record of solving complex technical and performance problems;
• Strong understanding of algorithmic complexity, optimization techniques, and best practices for designing efficient algorithms to solve complex problems;
• Familiarity with data processing libraries like Pandas and NumPy for advanced analytics and machine learning tasks;
• Proven ability to handle complex, loosely defined business logic and structure intricate processes cleanly;
• Solid grasp of software architecture and design patterns, with a track record of solving complex technical and performance problems;
• Autonomous in architectural decision-making, comfortable owning hard problems end to end.
 

Why Solid Software?
 

• We support Ukraine;
• A wonderful team of enthusiasts and like-minded people;
• Atmosphere of comfortable work & life balance;
• Flexible schedule and work-from-home opportunity;
• Opportunity to work on projects with different directions (web, mobile, tablet, watch, desktop);
• MacBook Pro and great tech;
• Decent compensation;
• Lack of bureaucracy;
• Compensation for professional events, sports activities;
• Corporate online parties and fun team-buildings;
• Anniversary and birthday presents.
 

Professional growth:
 

• Onboarding and mentorship program with a dedicated onboarding guide built by our team;
• Internal Career Path program from Developer to Architect that consists of knowledge areas for IT specialists, books, training sessions, and work activities;
• Corporate library with the best programming books (+ an ability to order a particular book if we don’t have it);
• Professional and constant feedback.
 

We truly value the unique talents and skills that each individual brings to our company. As we continue on our journey of growth, we eagerly anticipate the opportunity to welcome you into our team.
 

Apply now and help us shape what comes next!

Applying to the position, you may join one of the most respected and fastest growing institutional investors in the world. Our client is a professional investment management organization that globally invests the funds to ensure long-term sustainability. The company invests in all major asset classes, including public equity, private equity, real estate, infrastructure and fixed-income instruments, and currently has offices in Toronto, London, Hong Kong, New York, São Paulo, Luxembourg and Mumbai.
Client attracts and selects high-caliber individuals from top-tier institutions around the globe. Join our team and look forward to:
• Diverse and inspiring colleagues and approachable leaders
• Stimulating work in a fast-paced, intellectually challenging environment
• Accelerated exposure and responsibility
• Global career development opportunities
• Being motivated every day by important social purpose and unshakable principles
• A deeply rooted culture of Integrity, Partnership and High Performance
If you share a passion for performance, value a collegial and collaborative culture, and approach everything with the highest integrity, here's an opportunity.

• Responsibilities:

  • Manage timelines/deliverables within the team towards the successful delivery of projects.
  • Design software solutions by interacting with portfolio managers, traders, operations staff and peers to understand requirements.
  • Develop solutions that are in line with client's technology biases, deliver efficiency and scalability, and enable new trading activities.
  • Provide knowledge transfer to team members and support staff through application demos, walkthroughs, and documentation.

• Mandatory Skills Description:

  • Experience in Python in an enterprise environment, covering the whole development life cycle
  • Experience with web development using either Angular, React or Dash Plotly.
  • Agile/scrum/Jira/confluence/Git
  • Experience with Cloud technologies, preferably AWS
  • Proficiency in CI/CD pipelines
  • Unit and integration testing

• Nice-to-Have Skills Description:

  • Capital market experience
  • Experience with BI tools, preferably QuickSight.
  • Experience with terraform for Infrastructure as code and cloud provisioning.
  • Experience with Jupyter notebooks for data analysis and reporting.

As a Senior Backend Engineer, you will play a pivotal role in scaling and evolving the core systems that power our client agentic AI platform. With a product already live in production, you will work closely with our engineering leadership to take our infrastructure to the next level- from real-time orchestration and automation logic to scalable APIs and data pipelines.

You'll work at the heart of our stack, combining Node.js and Python to build high-performance, reliable backend services that power our voice and digital agents, analytics, and AI integrations. This is a hands-on role for a highly self-sufficient builder who loves elegant systems, clean code, and moving fast without breaking things.

What You'll Do

• Drive Execution: Act autonomously to define your own technical tasks, prioritize effectively, and push features to the finish line while collaborating seamlessly with a tight-knit core team.
• Build & Scale: Collaborate on system architecture and build out scalable backend services in Node.js and Python for our growing production workloads.
• Orchestrate AI: Integrate large language models (LLMs) and build multi-step, reasoning-based AI agent workflows using frameworks like LangGraph (a strong plus).
• Enhance Infrastructure: Own backend performance, observability, and infrastructure scalability, optimizing services in a cloud-native environment (AWS / GCP).
• Cross-Functional Collaboration: Work closely with frontend, AI, and product teams to design and implement impactful cross-functional features.
• Data & Delivery: Manage databases, caching, and distributed systems with strong data modeling practices, while upholding rigorous engineering standards and CI/CD practices.

What We're Looking For

• Experience: 7+ years of backend engineering experience building and scaling production-grade systems.
• Startup DNA: Previous experience as a founding engineer or a proven track record of thriving in a small, early-stage startup environment is a huge plus.
• Extreme Ownership: You are fiercely self-reliant. You don't wait for a ticket to be perfectly scoped; you can navigate ambiguity, define the work that needs to be done, and execute.
• Technical Deep Expertise: Deep knowledge of Node.js and Python, with a solid understanding of async and concurrency.
• Cloud & Architecture: Proven experience with cloud platforms (AWS, GCP) and managing microservices-based architectures with real production workloads.
• Database Mastery: Strong knowledge of databases (SQL + NoSQL), caching, and distributed architectures.
• AI Familiarity: Experience with LLM integration, LangGraph, or other agent orchestration frameworks is a strong plus.
• Education: BSc in Computer Science, Software Engineering, or equivalent.

Quintagroup is seeking a Senior Python Developer to join a leading European fintech product company.

Technology stack: Python 3.11, Django 4.2, Postgres, AWS (EventBridge, Lambda, ECS, RDS, DynamoDB etc.), Docker, Pandas, Polars, Terraform

RESPONSIBILITIES:

• development with Python, AWS
• participation in planning and execution stages
• communicate with international (UK/UA/US) development team and CTO 

REQUIREMENTS

• 5+ years of experience with Python
• Experience with AWS and Python frameworks
• Able to work in a team-oriented, collaborative environment
• Ability to share knowledge

Customer methodologies and tools

• Scrum (2 week sprints)

Senior Python Developer - Project tech stack:

• Python
• AWS

WE OFFER:

• Long term projects
• A company with a specialization in Python development for the last 22 years
• Health insurance
• Different work models (remote, office, or hybrid remote/office options)
• Projects in AWS, Azure, GCP
• Different domains of projects: FinTech, EdTech, GovTech, IoT, e-commerce, marketplaces, e-auctions, e-learning, public procurement, interesting tasks, possibilities for career and professional growth
• Friendly atmosphere and good working conditions
• regular team-buildings and corporate parties
• Online English classes
• Flexible working hours
• Experience with new technologies

Looking for an experienced Python developer, quant developer, or sports trading bot developer to build a fully working Polymarket bot.

Reference account: https://polymarket.com/@rn1

I need a bot that can copy this account’s trades in real time, manage risk, size positions properly, and keep monitoring the trades after entry.

 If the account exits a position, the bot should exit as well. If the account keeps holding, the bot should keep holding and continue running.

Ideally, you should be strong with mathematical models, probability, quant trading, APIs, and automated execution. Experience with Polymarket, CLOB API, Polygon wallets, sports data, tennis/basketball modeling, or similar trading bots is a big plus.

Please send your experience, estimated timeline, fixed price, and a short video or clip of the bot working. I will review the submissions and choose the best one.

Why This Role

You'll build systems that move real money and digital assets — exchanges, payment rails, crypto processing, and OTC desks — where every decision touches security, latency, and correctness. The

problems are real: real adversaries, real settlement guarantees, real users who can't afford downtime. If you want ownership over production fintech infrastructure rather than another CRUD app, this is that.

You'll join a small team shipping to production frequently, owning features end-to-end across our backend services, customer-facing products, and internal back-office tools.
 

Tech Stack

- Backend: Python 3.12, FastAPI, SQLAlchemy + Alembic, Gunicorn/Uvicorn

- Frontend: React 18 + TypeScript, Vite, Tailwind + shadcn/ui, React Query

- Back-office: React 18 + TypeScript, Vite, Tailwind + shadcn/ui

Databases: PostgreSQL 17 + MongoDB
 

What You'll Do

- Own full-stack features from spec through deployment, monitoring, and iteration

- Build and maintain FastAPI services handling payments, exchange, and crypto-processing flows

- Develop responsive interfaces for both customer-facing products and internal back-office tools

- Model and optimize data across PostgreSQL and MongoDB; manage migrations with Alembic

- Integrate third-party payment, banking, and crypto APIs

- Bake security and compliance into everything — you'll be trusted with money-handling code, often without a dedicated QA safety net
 

Must Have

- 5+ years full-stack experience, with at least 3 building production backend services

- Strong command of Python / FastAPI and React + TypeScript

- Solid experience with PostgreSQL (relational modeling, query optimization)

- Advanced, daily use of AI tools in your workflow — you use assistants like Claude, Copilot, or

- Cursor to scaffold, refactor, and review code, and you can judge when to trust their output and when

to discard it

- Genuine independence — you take ownership, make sound calls, and drive work forward with minimal oversight (essential on a remote, fast-moving team)
 

Bonus

- Experience with MongoDB and the wider frontend stack (Vite, shadcn/ui, React Query)

- Fintech background — payments, banking, PSP, or exchanges

- Crypto / digital assets — exchanges, processing, custody, or OTC (a strong extra plus)

We're building a traffic arbitrage / performance-marketing platform and are now refining it beyond MVP. You'll work on the core backend: tracking and redirect services, billing logic, webhook integrations, and database evolution on a live system. Short engagement (several weeks), part-time, post-payment.

What you'll work on

• Server-side tracking / redirect services under load and latency SLA — 302 handling, GeoIP lookup, fingerprinting, event logging
• Webhook / postback integrations — signed webhooks (HMAC), idempotency, reliable event ingestion from an external partner (broker)
• Financial / billing logic — commission and payment calculation, monetary arithmetic with Decimal (never float), state machines (pending / approved / paid / hold), chargebacks / clawbacks, idempotent recalculation
• Database schema design and evolution with backward compatibility — migrations on a live system

• Application-level security — webhook signing, JWT / secrets management, no PII in logs

   

Must-have stack

• Python 3.11+ with async (async/await, asyncio)
• FastAPI, Pydantic
• PostgreSQL at an advanced level — JSONB, indexing, query optimization on large tables, writing migrations
• SQLAlchemy 2.x + Alembic (or equivalent ORM + migrations)
• Redis, Celery

Strong plus

• Domain experience in iGaming / forex / trading / affiliate / adtech / performance marketing - understanding of GGR, FTD, postbacks, click-tracking, sub-ID, RevShare / CPA / Hybrid
• Cloudflare API (zones, DNS, DNSSEC, SSL, proxy), or solid DNS/SSL knowledge and experience with infrastructure APIs
• Anti-fraud / rules engines — velocity checks, fingerprint deduplication, IP / ASN / GEO analysis
• Experience with nginx, PM2, S3-compatible storage

Requirements

• Level: Middle+
• English: not critical

Conditions

• Duration: several weeks
• Workload: part-time
• Payment format: post-payment

We are looking for a Senior Backend Engineer to join our Legal Tech engineering team and help build the next generation of AI-driven litigation ecosystem. This role combines top-tier backend engineering, cloud architecture, and cutting-edge LLM/AI innovation.

You’ll build high-scale, secure, multi-tenant services that turn our real-time transcription engine into AI-powered workflows and assistants used by legal teams. The role offers real ownership and chances to lead initiatives, while giving you space to grow your skills in AI development and modern dev-AI tools — all within a supportive, collaborative team.

This role is for people who bring passion, curiosity, and a genuine drive to build something meaningful as part of a strong, mission-driven team.

This is a remote position based in Ukraine. Candidates must have full professional proficiency in English.

What makes Verbit unique?
Verbit turns speech into impact. Our team of 250 professionals builds AI-driven solutions that help the world’s leading organizations get real value from their audio and video content. We serve high-end customers across the Legal, Media and Education markets with a next-generation verbal-intelligence platform that brings AI into the core of their workflows.

Our in-house technology combines advanced LLMs, GenAI capabilities and speech AI to power everything from legal-tech automation and real-time insights to intelligent media and learning workflows. Beyond transcription or accessibility, Verbit provides actionable intelligence: smart summaries, analytics, search, knowledge extraction, legal-deposition insights and more.

With more than 3,000 global customers relying on Verbit — including top law firms, universities, enterprises and media organizations — we’re building the future of how speech data is processed, understood and used.

     If you want to join our journey, you’ll need:

• 7+ years of hands-on backend development experience in a high-scale production environment
• Strong proficiency with Python, REST APIs and Cloud (e.g. AWS, GCP)
• Strong experience designing and building distributed, cloud-native microservices
• Experience with event-driven architectures and asynchronous processing
• Solid understanding of system design, scalability, availability, and performance optimization
  Practical experience using AI-powered development tools (e.g., Cursor, Claude Code)
• A significant advantage if you have practical experience with AI infra, such as: RAG, Agentic frameworks, Langfuse, LiteLLM
  Ability to take ownership and drive projects end-to-end, working proactively and independently and as a team in a fast-moving environment

• Good communication skills and teamwork
  Ability to work efficiently both individually and within a team

   

  It will be even better if you have:

• Formal education in relevant fields (CS, Math, Electrical Engineering etc.)
• Experience with large scale SaaS solutions
• Ability to integrate AI/LLM features into backend services (e.g., prompting, embeddings, RAG pipelines, fine-tuning)

Workload: 20-40 hours per week, depending on the projects !!!
Start: as soon as possible
Duration: ongoing collaboration
Location: any, remote position
Interview stages: 1 interview with the client

Responsibilities

• Designing, building, and maintaining features for NetroIQ and Kanban CRM, from database migration to UI components
• Translating customer needs into technical solutions: contributing ideas during the intake phase, making architectural choices, and building and delivering custom applications from start to finish
• Working on the Python FastAPI backend: new API routes, authentication logic (JWT, multi-tenant), background tasks
• Working on the Next.js (App Router) and React 19/Vite frontend: server-side data fetching, client-side state, and Tailwind-based UI components
• Building and maintaining integrations with external services: Stripe, various network hardware vendor APIs, Exact Online, and client-specific connections
• Modeling and migrating databases (Prisma/PostgreSQL, SQLite) with attention to data integrity and zero-downtime migrations
• Setting up and monitoring multi-tenant isolation: per-tenant credentials, data shielding, and access control
• Writing secure code: encryption of sensitive data, protection of API keys, OWASP Top 10
• Contribute to product strategy and architectural choices — you are not an executor, but a co-builder
• Independently prioritize and resolve bugs, regressions, and production incidents

Qualifications
Required !!!

• 3–5 years of demonstrable experience as a full-stack developer on SaaS products and/or custom projects in production
• Strong knowledge of TypeScript and React (hooks, context, modern patterns); Experience with Next.js App Router is a plus
• Strong Python background with knowledge of FastAPI or a similar async framework
• Familiar with relational databases (PostgreSQL and/or SQLite), SQL migrations, and ORMs (preferably Prisma)
• Practical experience with REST API design, JWT authentication, and role-based access control
• A feel for both product and customer: you think about UX, ask the right questions regarding a customer request, and deliver what is truly asked for
• Self-starter who thrives without micromanagement — you take on work, communicate proactively, and deliver

Preferred

• Experience with Stripe (Checkout Sessions, Subscriptions, Webhooks)
• Knowledge of multi-tenant SaaS architectures and data isolation patterns
• Familiarity with network management systems such as Unifi, Cisco, TP-Link, etc.
• Experience with Linux deployments (systemd, Nginx, Cloudflare)
• Affinity with transactional email templates and delivery flows
• Basic knowledge of Tailwind CSS

Unidatalab is looking for motivated and ambitious students or recent graduates who are eager to take their first step into the world of AI-driven technologies. 

About the Client:

Our client develops an AI-powered voice solution for quick-service restaurants. The product combines NLP, speech recognition, and noise-cancellation technologies to automate drive-thru ordering. As a result, restaurants can significantly reduce wait times, improve order accuracy, increase operational efficiency, and enhance overall customer satisfaction.

Who We’re Looking For:

• 3rd+ year students or recent graduates in Computer Science, Software Engineering, or related fields who are ready to work full-time (8 hours/day); 
• Confident Python knowledge and readiness to work with system configurations & low-code tasks;
• Upper-Intermediate spoken English; 
• Strong soft skills: responsibility, communication, proactivity, and good organisation. 

Tech stack: Python (YAML, JSON, pytest), Poetry, Git/GitHub. 

Hiring Process:

Our hiring process is straightforward:
HR Interview → Small Test Task on LeetCode → Technical Interview → Practical task to become familiar with the product & Client Interview (in English) → Offer. 

Why Join Us: 

• Working with the real AI product; 
• Flexible, remote-first environment; 
• Paid vacation, sick leaves & holidays.

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