Software Developer - API - Senior

The Code Crackers Inc; Toronto; On-site; CAD 90,000 - 140,000; Full time

Job summary

The Code Crackers Inc is seeking a skilled software engineer to translate technical specs into working systems. You will design and implement REST APIs, enhance web/mobile apps, and support integration and testing efforts across the SDLC.

Required are 5+ years with React, Node.js, Next.js, API design, and experience with AI/ML tools and cloud platforms such as Azure. Onsite work is expected, with collaboration across multi-disciplinary teams.

Qualifications

• 5+ years experience with React framework and TypeScript.
• 5+ years of Node.js and Next.js development.
• 5+ years building and testing RESTful APIs.
• 2-3+ years with Multi-agent AI, LLMops, LangChain, RAG, Python.
• Experience with ML models such as XGBoost and TensorFlow.
• Experience with Airflow and PySpark 5+.
• Hands-on experience with Progressive Web Apps (PWAs).
• Strong HTML, JavaScript, CSS skills and CSS frameworks.
• Experience on Azure cloud platform.

Responsibilities

• Translate technical specs into working, tested software.
• Develop REST API platforms and convert SOAP to REST as needed.
• Design, code, test, debug and document applications across SDLC.
• Support integration, testing, scripting, and troubleshooting.
• Collaborate with IT and business stakeholders across projects.
• Provide post-implementation support and resolve issues.

Skills

React framework

TypeScript

Node.js

Next.js

REST APIs

Multi-agent AI

Python

TensorFlow

XGBoost

Airflow

PySpark

HTML / CSS / JavaScript

Azure

Swagger / OpenAPI

Apigee

Mule / Camel

Tools

Apigee

Swagger

Swagger YAML

Mule

Camel

Job description

Responsibilities Required to translate technical systems specifications into working, tested This includes: developing detailed programming specifications writing and/or generating code compiling data-driven programs, maintaining, and conducting unit Analyzes, designs, develops, codes and implements programs in one or more programming languages, for Web and Rich Internet Applications Supports applications with an understanding of system integration, test planning, scripting, and troubleshooting Designs and develops REST API platform (e.g., with using Apigee/APIM) Converts web services from SOAP to REST or vice-versa Resolves and troubleshoots technical problems which arise during the use and operation of software packages, including technical assistance in implementation, conversion and migration.

General Skills

• Experience in programming and analysis;
• specialized software package support at the specified experience level;
• Ability to collaborate with IT Professionals throughout the Software Development Life Cycle;
• Experience in structured methodologies for the development, design, implementation and maintenance of applications;
• Experience in design, code, test, debug and document applications;
• Experience in the use of object and/or third generation language development tools;
• Experience in one or more programming languages;
• Experience in application design, latest design patters, deployment and troubleshooting;
• Experience with relational and hierarchical database technologies;
• Experience in the use of information retrieval packages using query languages;
• Experience with one or more communications protocols;
• Experience in structured methodologies for the design, development, implementation and maintenance of applications;
• Experience eliciting and documenting information from diverse business area stakeholders and subject matter experts;
• Excellent analytical, problem-solving and decision-making skills; verbal and written communication skills; interpersonal and negotiation skills;
• A team player with a track record for meeting deadlines;

API Skills

• Experience with Web Technologies (DHTML, AJAX, etc.);
• Experience with Security frameworks (e.g., JWT, OATH2);
• Experience in API layer like security, custom analytics, throttling, caching, logging, monetization, request and response modifications etc. using Apigee;
• Experience in creating REST API documentation using Swagger and YAML or similar tools desirable;
• Experience with Integration frameworks (e.g., Mule, Camel) desirable;
• Desirable Skills Knowledge and experience with programming Internet-ready applications;
• Knowledge and experience in rapid application development (RAD) methodologies;
• Knowledge and understanding of Information Management principles, concepts, policies and practices;
• Experience with middleware and gateways;
• Experience reviewing, analyzing, and modifying product installation scripts including encoding, testing, debugging;
• Ability to provide post-implementation support and resolve any post-implementation technical issues;
• Experience conducting design walkthrough sessions with project team;
• Knowledge and understanding of Accessibility for Ontarians with Disability Act (AODA) and related regulations and standards;
• Ability to provide user and system documentation as required;

Desirable Skills

• Knowledge and experience with programming Internet-ready applications;
• Knowledge and experience in rapid application development (RAD) methodologies;
• Knowledge and understanding of Information Management principles, concepts, policies and practices;
• Experience with middleware and gateways;
• Experience reviewing, analyzing, and modifying product installation scripts including encoding, testing, debugging;
• Ability to provide post-implementation support and resolve any post-implementation technical issues;
• Experience conducting design walkthrough sessions with project team;
• Knowledge and understanding of Accessibility for Ontarians with Disability Act (AODA) and related regulations and standards;
• Ability to provide user and system documentation as required;

Supplier Comments Closing Date/Time: 2026-08-24, 12:00 p.m. EST Max submission: 1 (one) 5 days onsite

Must Have

• 5+ Experience with React framework and typescript
• 5+ Experience with Node.js and Next.js
• 5+ Experience building and testing RESTful APIs
• 2-3+ years of Multi-agent (Agentic AI), LLMops, MCP, langchain, langGraph, RAG, Qdrant, Python
• Experience with ML models - XGboost, Tensorflow
• Experience with Airflow, PySpark 5+
• Hands on experience with Progressive Web Apps
• Experience and expert knowledge in HTML, JavaScript, CSS and CSS Frameworks
• Experience with cloud platforms such as Azure

Nice to have

• Hands on experience developing production level AI agents, frameworks and AI supported systems using various models, tools and architectures (e.g. LLMs, ML, Computervision, etc.)
• Hands on experience designing and implementing MLOps tools and processes in enterprise environments
• Prior OPS exp or public sector exp.