Junior Software Engineer

We build an AI agent platform. Our agents talk to real customers over WhatsApp,

Instagram, email and web chat, and connect to the systems businesses already run

— CRMs, ERPs, calendars, payment and shipping providers.

We are a small engineering team in Istanbul with a written decision record,

automated evaluation suites for every agent template, and a strong habit of

shipping. A meaningful part of our codebase is written with AI coding tools and

reviewed by humans. That is how we work, every day — and it is what this role is

about.

THE STACK YOU WILL WORK IN

• Backend: Python, FastAPI, Celery, Redis, PostgreSQL, SQLAlchemy

• AI layer: OpenAI and Anthropic APIs, tool calling, LangChain primitives, our

own multi-tenant agent runtime

• Frontend: Next.js, React, TypeScript, TanStack Query

• Integrations: REST/OpenAPI, OAuth 2.0, webhooks, SSE, Meta Cloud API

• Infra and tooling: Docker, GitHub Actions, AWS, Claude Code

WHAT YOU WILL DO

• Connect agents to real systems — Google Calendar and Sheets, Shopify, payment

and shipping APIs, CRMs. Each one is a well-scoped, testable piece of work.

• Write the YAML configuration, tool definitions and evaluation cases that keep

an agent from regressing.

• Ship features and fixes across the Python backend and the TypeScript console,

then take new customers live.

• Read AI-generated code critically: test it, question it, correct it. Working

well with these tools means knowing where they are wrong.

WHAT WE ARE LOOKING FOR

• A bachelor's degree in an engineering discipline (Computer, Software,

Electrical-Electronics, Industrial or related). New graduates and candidates

with up to about two years of experience are welcome.

• Solid fundamentals in Python or TypeScript, and the willingness to learn the

other.

• Comfort with HTTP and REST — able to read an API document and write an

integration against it.

• Hands-on experience with AI coding tools (Claude Code, Cursor, Copilot or

similar) and genuine enthusiasm for working this way.

• Git fundamentals: readable commits and pull requests.

• A GitHub profile with code we can read. It does not need to be polished or

popular — coursework, side projects and unfinished experiments all count. We

want to see how you write, not what you have shipped.

• Ability to read technical documentation in English.

• Ownership: in a small team, "not my job" does not exist.

• Military service settled for the next two years — completed, exempt, deferred,

or not applicable. We ask because the role needs an uninterrupted run, not to

rule anyone out.

NICE TO HAVE

FastAPI, Celery, Redis or PostgreSQL experience · Next.js or React · Docker ·

anything you built with an LLM API · OAuth or webhook integrations ·

open-source contributions.

WORKING MODEL

Hybrid: 2 days in the office (Maltepe, Istanbul), 3 days remote. The first two

months are fully in-office, so you get the context, the codebase and the team

properly.

You work on a MacBook Pro we provide, and the AI coding tools we use are paid

for — they are part of the job, not something you fund yourself.

HOW THE PROCESS RUNS

Three steps, and no screening call. We read your application first — the GitHub

profile and the repository you point us at — and the first conversation we have

with you is a real one.

1. A practical case study for the candidates we like: a task close to our real

work, an integration against a public API. It will not eat your weekend.

2. A one-to-one interview, face to face in the office, about the case you sent —

your code, your decisions and how you worked with AI tools on it.

3. An offer, quickly. No committee and no fourth round, so a strong candidate is

not kept waiting for weeks.

Every application gets an answer, including the ones we turn down.

HOW TO APPLY

Apply through our own form: https://mangolab.ai/job-junior-software-engineer.html#apply

It asks for your GitHub profile and one repository you want us to look at first.

Applications without a GitHub link are not reviewed.