Senior Full Stack Engineer

Description Ciklum; Polska; Remote; PLN 200,000 - 320,000; Full time

Benefits offered by this job

Full remote work

Luxmed premium medical package

Udemy access for learning

MyBenefit cafeteria platform

Company-paid certifications

Internal mobility opportunities

Conferences and workshops

Job summary

Ciklum is seeking a Senior Full Stack Engineer to join our Poland team. You’ll work in a cross-functional group developing production AI agents, with a focus on TypeScript, React, Python, and AWS services such as Lambda and Bedrock.

The role emphasizes multi-agent systems, observability, and secure, scalable architectures. We value hands-on experience with AI tooling, CI/CD, and containerized deployments, plus strong English communication.

Qualifications

• Strong frontend experience with React and TypeScript.
• Backend experience with Python for services and automation.
• Hands-on AWS beyond serverless including containers (ECS/EKS) and IAM.
• Experience shipping features using LLM APIs (prompts, tool calls, structured output).
• CI/CD knowledge, ideally GitLab CI/CD.
• Fluent written and spoken English.
• Knowledge of Kubernetes and GraphQL for internal APIs.
• Experience with data stores (NoSQL/SQL) and migrations.

Responsibilities

• Build production AI agents: develop TS services on AWS (Lambda, Step Functions) using AI SDKs.
• Design agent behavior: define what the model investigates and what code enforces.
• Sandbox agents: build read-only runtimes, scoped tool access, timeout guards.
• Evaluate AI features: create golden sets, production replays, and calibrate models.
• Ensure observability: metrics, logs, alerts in Splunk and VictoriaMetrics.
• Maintain Terraform roots across environments and improve GitLab CI/CD pipelines.
• Build resilient integrations handling retries, rate limits, and failures.
• Use AI to assist code, review AI-generated changes for security and correctness.
• Configure assistants, skills, hooks, and MCP servers with engineers.
• Build agent-facing tools: React and APIs for summaries, dashboards, and internal tooling.
• Document systems with architecture diagrams, runbooks, and decision records.

Skills

React

TypeScript

Python

AWS

LLM integration

Observability

CI/CD

Kubernetes

GraphQL

Terraform

Security awareness

Communication

NoSQL/SQL

GitLab CI/CD

Multi-agent systems

MCP servers

LangGraph/Strands

Tools

AWS Lambda

Bedrock

LangGraph

Strands

AI SDKs

Terraform

Splunk

VictoriaMetrics

Job description

Ciklum is looking for a Senior Full Stack Engineer to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.

Responsibilities:

• Build production AI agents: develop TypeScript services on AWS (Lambda, Step Functions, DynamoDB, Bedrock) using Strands or LangGraph and AI SDKs
• Design agent behavior: define what the model investigates and what code enforces
• Sandbox agents: build read-only runtimes, scoped tool access, worktree-contained reads, and budget/timeout guards against model misbehavior
• Evaluate AI features: build golden sets and production replays, calibrate judges, gate changes on recall, precision and false-positive rate, and compare models and effort levels before release
• Ensure observability: emit reason-coded metrics and structured logs, alert on failures, and investigate production misses in Splunk and VictoriaMetrics
• Run infrastructure: maintain Terraform roots across environments under tagging and permission-boundary rules; improve GitLab CI/CD for build, test, deploy and quality gates
• Build integrations resilient to retries, rate limits, permanent failures and stale state
• Use AI to write/review code; keep agent context current
• Review AI-written changes for security, correctness and maintainability, catching issues tests miss
• Enable teams: configure assistants, skills, hooks and MCP servers; pair with engineers and share proven practices
• Build agent-facing tools: React and APIs for summaries, dashboards and internal tooling, with outputs readable by agents, CLIs and Slack
• Document systems with architecture/sequence diagrams, runbooks and decision records

Requirements:

• Full-stack & Versatility: Broad technical perspective with an emphasis on adaptability across modern software stacks and architectures, favoring breadth and quick ramp-up over narrow specialization
• Frontend & TypeScript: Strong production experience with modern React and TypeScript (including Node.js, async patterns, testing, and monorepo tooling).
• Backend & Scripting: Working proficiency with Python for backend services, evaluations, analysis, and automation tooling
• AWS Beyond Serverless: Practical hands-on experience across the AWS ecosystem - extending beyond serverless (Lambda, Step Functions, DynamoDB, Bedrock) to broader architectural components such as containers (ECS/EKS), networking, compute, and IAM
• LLM features in production: Has shipped features leveraging LLM APIs (prompts, tool calling, structured output, long context) and can describe the eval that gated release, what failed, and what changed
• AI Champion Mindset: Enthusiastic, proactive embrace of AI-assisted engineering tools in daily workflows (e.g., Copilot, Cursor, LLM APIs) combined with the drive to champion AI-first practices and productivity across the team
• Infrastructure as Code: Able to read and safely modify Terraform configurations across environments
• Data: Hands-on experience with both NoSQL and SQL stores, including schema changes and live-system migrations
• Observability: Able to design metrics, logs, and alarms for non-deterministic systems, and effectively debug production issues from them
• CI/CD: Proficiency with modern CI/CD pipelines, ideally GitLab CI/CD
• Communication: Fluent written and spoken English, with the ability to articulate trade- offs clearly and align team members around technical decisions
• Multi-agent systems, MCP servers, or evaluation frameworks
• LLM cost control: model routing, prompt caching, token budgets
• Prompt-injection defense and agent security
• GraphQL for internal APIs and tooling
• Code intelligence or retrieval work (indexing, symbol search, knowledge bundles)
• Kubernetes, AWS AppSync, and EventBridge

What's in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Flexibility: Enjoy flexibility - full remote working possibilities
• Care: We've got you covered with company-paid premium medical package through Luxmed
• Benefits: Access the MyBenefit cafeteria platform, allowing you to choose perks that best suit your lifestyle and needs

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you'll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

Explore, empower, engineer with Ciklum!