Senior Software Engineer

Effectual; Poland; Remote; PLN 547,000 - 657,000; Full time

Job summary

A technology innovation firm in Poland is looking for a Senior Software Engineer to drive internal innovation related to LLMs and integration with enterprise APIs. The successful candidate will develop solutions for customer engagement and internal use, focusing on Python and Typescript, in a remote-first environment. A strong background in AWS and database management is essential for this role. Competitive salary and benefits offered.

Benefits

Medical, dental, and vision health insurances

401k with Company match

Paid time off (PTO)

Short and long term disability insurance

Qualifications

• 7+ years building production applications from design through release and iteration.
• Strong Python, TypeScript with React.
• Hands-on LLM integration and experience with a hyperscale cloud platform.

Responsibilities

• Build agentic services in Python and integrate with enterprise platforms.
• Design, develop, and deploy web apps leveraging Typescript, React, and Tailwind CSS.
• Collaborate with cross-functional teams to transform prototypes into scalable platforms.

Skills

Python

TypeScript

LLM integration

Collaboration

AWS

Database management

Tools

React

PostgreSQL

FastAPI

Terraform

Job description

Effectual’s Office of the CTO sets the company’s technical strategy and delivers the innovation that makes it real. We build and validate new platforms and capabilities, then take the right ones to production. AI and agentic systems remain a core thread of the roadmap, with established production deployments both internally and for customers. As a Senior Software Engineer, you will bring ideas to production on AWS, including integrating LLMs and agents with various platforms and enterprise APIs. This role is primarily internal innovation with occasional support for customer engagements, and the solutions you build will frequently be used both internally and for customer engagements. You will report to the CTO & Chief AI Officer and work with a cross-functional team.

Overview: A Glimpse into the Daily Routine

Your days follow an agile rhythm: two-week sprints, daily standups, PR-driven development with code reviews, and end-of-sprint demos to showcase progress. A strong documentation culture keeps work clear and consistent, with design docs, ADRs, and runbooks shaping how the team builds and delivers.

Collaboration and Execution

Collaboration is at the heart of your role. You’ll partner with product, sales, solution architecture, delivery, and operations to transform prototypes into scalable platforms. Some days you’ll support sales by identifying client use cases or drafting SOWs, while others you’ll focus on pragmatic experimentation—testing small, measurable ideas that graduate into pilots and production deployments.

You’ll also enjoy protected learning time (about 10% of your week) to explore new tech, research, and prototype. Working in a remote-first environment, you’ll connect with teammates across US time zones, with core hours spanning Pacific through Eastern.

Essential Duties and Responsibilities

• Build agentic services in Python using frameworks like LangGraph and LangChain, leveraging the latest frontier LLMs from Anthropic, OpenAI, and others.
• Integrate with enterprise platforms, APIs, and developer/data systems to automate workflows and enrich context.
• Design, develop, and deploy web apps, generally leveraging Typescript, React, and Tailwind CSS.
• Design data and retrieval patterns (PostgreSQL, DynamoDB, RAG), as well as evaluation and guardrails.
• Build backends in Python using libraries like FastAPI.
• Contribute to CI/CD, collaborate with platform and DevOps engineers to codify infrastructure (Terraform preferred), and instrument services (tests, monitoring, safe rollback).

Qualifications

• 7+ years building production applications from design through release and iteration.
• Hands-on LLM integration (tool use/function calling, retrieval, evaluations, safety/guardrails, tracing/observability).
• Strong Python (APIs, async/concurrency, packaging, testing), and TypeScript with React.
• Comfortable with databases (PostgreSQL and/or DynamoDB preferred) and log/event pipelines.
• Experience with a hyperscale cloud platform (AWS preferred): compute, messaging/queueing, storage, CI/CD, observability, IAM basics.
• Practical use of AI dev tools (Claude Code, ChatGPT, GitHub Copilot, Cursor, etc.) to accelerate delivery.
• Excellent collaboration and communication; able to partner with internal stakeholders and (when needed) customers.

Nice-to-Have Skills and Experience

• LangGraph/LangChain (others welcome) and multiagent patterns.
• UI/UX instincts for operator workflows.
• LLM evaluation and guardrails (harnesses, red teaming, content filters).
• Experience delivering in enterprise scale or public sector environments.
• Experience in regulated/compliance contexts (HIPAA, PCI DSS) and with change processes.
• AWS Bedrock model fine-tuning customization and/or SageMaker experience; vector stores (OpenSearch, pgvector); prompt caching.
• Experience with prompt and context engineering and structured output from LLMs.
• Business process automation/analysis; consulting/stakeholder management.
• Docker or other containerization technologies.

Company Offered Benefits

Full-time employees are eligible to participate in our employee benefit programs:

• Medical, dental, and vision health insurances,
• Short term disability, long term disability and life insurances,
• 401k with Company match
• Paid time off (PTO) (120 hours PTO that accrue over one year)
• Paid time off for major holidays (14 days per year)
• These and any other employee benefit offerings are subject to management’s discretion and may change at any time.

Physical Demands and Work Environment

The work is generally performed in an office environment. Physical demands include sitting, keyboarding, verbal communication, written communication. Employees are occasionally required to stand; walk; reach with hands and arms; climb or balance; and stoop, kneel, crouch, or crawl. The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this position. Reasonable accommodation may be made to enable individuals with disabilities to perform the functions.

Salary Range for this position: $150,000-$180,000

Salary ranges provided are for informational purposes only and may vary depending on factors such as experience, qualifications, and geographic location. The final salary offer will be determined based on the candidate's skills and alignment with the role requirements.

Equal Employment Opportunity

This job description may include EEO statements. Effectual Inc. is an EEO employer and does not discriminate on the basis of any protected classification in its hiring, promoting, or any other job-related opportunity.