Senior Full Stack Engineer

Ciklum; United States; Remote; USD 46,000 - 71,000; Full time

Benefits offered by this job

Remote work

Medical package

Learning budget

Certifications

MyBenefit platform

Job summary

Ciklum is seeking a Senior Full Stack Engineer to join our cross-functional team in Poland. You will build production AI agents, design agent behavior, and ensure observability and reliability across AWS-based services.

The role emphasizes TypeScript/React frontend and Python backend work, with Terraform-based infrastructure and GitLab CI/CD pipelines. Remote-friendly and focused on AI-first engineering practices.

Qualifications

• Broad technical perspective with adaptability across modern stacks
• Strong React and TypeScript experience
• Proficiency in Python for backend services and automation
• Hands-on AWS experience beyond serverless (containers, IAM, networking)
• Shipped features using LLM APIs and prompts in production
• Champion AI-first engineering practices
• Infrastructure as Code with Terraform
• Experience with NoSQL and SQL databases
• CI/CD proficiency (GitLab preferred)
• Fluent English communication

Responsibilities

• Build production AI agents: TypeScript services on AWS using Strands or LangGraph and AI SDKs
• Design agent behavior and governance
• Sandbox agents with read-only runtimes and guarded resources
• Evaluate AI features, calibrate judges, and compare models before release
• Ensure observability with metrics, logs, and alerts in Splunk/VictoriaMetrics
• Manage infrastructure with Terraform across environments
• Improve GitLab CI/CD for build, test, deploy, and gates
• Build resilient integrations with retry, rate limits, and state handling
• Write/review AI-generated code for security and correctness
• Enable teams: configure assistants, hooks, and MCP servers
• Develop agent-facing tools: React UIs, dashboards, CLIs and Slack outputs
• Document architectures with runbooks and diagrams

Skills

Full-stack versatility

Frontend (React)

TypeScript

Python (backend)

AWS (beyond serverless)

LLM features in production

CI/CD (GitLab)

Kubernetes

GraphQL

Observability

Terraform

Data stores (NoSQL/SQL)

Tools

Terraform

AWS

GitLab CI/CD

Splunk/VictoriaMetrics

React

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!