Senior Python Engineer

Location: Vilnius, Vilnius City Municipality, Lithuania, Kaunas, Kaunas City Municipality, Lithuania

Workplace: hybrid

Description

Softeta is a software engineering partner for finance, energy, industrial, and other high-stakes sectors. We specialise in building and modernising backend-heavy, integration-critical systems where speed, accuracy, and reliability are non-negotiable. With 100+ AI and custom software experts across engineering hubs in Lithuania and Poland, we embed ourselves directly into client operations — delivering custom software, automation, and AI where they drive the most value. Clients such as SEB, NordVPN, and CarVertical trust us with systems that serve millions of users globally.

At Softeta, we are looking for a Senior Python Engineer to become a member of our small, agile development team, playing a pivotal role in shaping the future of our US-based client.The team will be responsible for a greenfield project to build a new payment processing platform from the ground up, moving away from existing systems to create a modern, scalable, and efficient solution.

Key Responsibilities:

• Design and develop backend services using Python and Fast API, taking ownership from technical design through production delivery.
• Shape the platform’s architecture, making practical decisions around scalability, security, reliability, and maintainability.
• Build robust APIs and payment integrations, ensuring transaction integrity, safe retries, and effective error handling.
• Collaborate directly with product managers and client stakeholders to clarify requirements, assess trade-offs, and deliver solutions.

Technologies: Python, FastAPI, AWS, PostgreSQL, TypeScript, React.

Requirements

• 5+ years of experience in software development with a strong focus on Python.
• Strong experience with FastAPI or comparable Python frameworks such as Django or Flask, including API design and backend architecture.
• Familiarity with TypeScript and React or any modern TypeScript Frameworks.
• Solid PostgreSQL and SQL skills, including data modelling, transactions, and performance optimisation.
• Ability to own complex technical work independently, explain architectural decisions, mentor colleagues, and communicate effectively in English.

Benefits

• Diverse and technically challenging projects.
• Training budget for professional and personal growth.
• Flexible working hours and a hybrid or remote workplace model.
• Flexible schedule and an Agile/SCRUM environment.
• Technical equipment that you can choose.

Salary:

• For employees: 4500 EUR to 6000 EUR monthly (gross).
• For contractors: 35 EUR to 40 EUR per hour (plus VAT).