CrawlJobs Logo

Senior Software Engineer - Go (Next-Gen Firewall)

qualgo.net Logo

Qualgo

Location Icon

Location:
Vietnam , Ho Chi Minh City

Category Icon

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided

Job Description:

We are seeking a Senior Backend Engineer (Go) to join our core engineering team building a Next-Generation Firewall (NGFW) powered by Artificial Intelligence. In this role, you will architect and develop the high-performance control plane and data processing engines that protect enterprise networks from sophisticated cyber threats. You will not just build APIs; you will bridge the gap between low-level network traffic analysis and high-level threat intelligence. You will integrate industry-standard engines like Suricata, Squid, and OPNsense into a unified, AI-driven security platform. You will work on complex technical challenges involving zero-trust architecture, real-time packet inspection, and massive-scale threat data pipelines.

Job Responsibility:

  • Design and implement high-performance Go services that interact with network subsystems (netfilter/nftables) and open-source security engines (Suricata, Squid, Zeek)
  • Design and implement routing functionalities on low resource gateway system
  • Develop custom plugins or sidecars to ingest, parse, and normalize IDS/IPS alerts (Suricata EVE logs) and Proxy logs for the AI engine
  • Build the "Action Engine" that translates AI threat verdicts into real-time blocking rules (firewall policies, BGP blackholing, or DNS sinkholing)
  • Deeply integrate with OPNsense APIs/plugins to orchestrate policy updates across distributed firewall nodes
  • Architect scalable gRPC and REST APIs to serve as the control plane for thousands of firewall agents
  • Write highly optimized, concurrent Go code to handle high-throughput log ingestion with minimal latency/GC overhead
  • Design distributed locking and consistency mechanisms to ensure firewall policies are synchronized globally across multi-tenant environments
  • Build low-latency pipelines using Kafka or NATS JetStream to stream network telemetry to our AI/ML inference engine
  • Implement WebSocket or HTTP/2 streaming for real-time threat visualization and alerting dashboards
  • Collaborate with Data Scientists to ensure network data (PCAP, flow logs) is efficiently structured for anomaly detection models
  • Optimize system performance for high packet-per-second (PPS) processing and low-latency throughput
  • Debug complex networking issues (TCP handshake failures, MTU issues, asymmetric routing) using tools like tcpdump, Wireshark, and eBPF
  • Implement rigorous telemetry (Prometheus/Grafana) to monitor the health of distributed firewall nodes
  • Provide technical guidance on Go best practices, concurrency patterns, and secure coding standards
  • Work closely with the Security Research team to understand new attack vectors and implement detection logic

Requirements:

  • Bachelor's or Master’s degree in Computer Science, Cybersecurity, Network Engineering, or related field
  • Deep understanding of goroutines, channels, memory management, and profiling (pprof)
  • Strong grasp of the OSI model, TCP/IP, DNS, TLS/SSL, VPNs (WireGuard/IPsec), and Routing
  • Experience with Docker, Kubernetes, and deploying network appliances on AWS/GCP/Azure
  • Production experience with Kafka, RabbitMQ, or NATS
  • Good English skills (speaking and listening) to communicate with the global teams
  • Hands-on experience with Suricata, Snort, Zeek, or Squid Proxy
  • Familiarity with OPNsense or pfSense architecture is a huge plus

Nice to have:

  • Experience with eBPF (Cilium/Ebpf-go) for high-performance packet filtering
  • Knowledge of DPDK or XDP for kernel-bypass networking
  • Understanding of B2B SaaS multi-tenancy requirements
  • Experience implementing Zero Trust Network Access (ZTNA) concepts
What we offer:
  • Meaningful work & impact
  • Competitive rewards
  • Growth & well-being
  • People & workspace
  • Young & dynamic environment

Additional Information:

Job Posted:
January 10, 2026

Job Link Share:
PREMIUM
More languages and countries
Unlock more languages and countries
Languages
English Čeština Deutsch Ελληνικά Español Français +15
Countries
United States United Kingdom India Canada Australia +
See plans
Plans from $2.99 / month

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Senior Software Engineer - Go (Next-Gen Firewall)

New

Teaching Assistant

Being a teaching assistant is a life changing job! INSPIRE- Help to inspire the ...
Location
Location
United Kingdom , Littlehampton
Salary
Salary:
89.00 - 107.00 GBP / Day
https://www.randstad.com Logo
Randstad
Expiration Date
June 11, 2026
Flip Icon
Requirements
Requirements
  • Experience (voluntary or paid) working with children and young adults
  • Relevant SEN experience (desirable)
  • GCSE Maths and English or equivalent
  • Eligibility to work in the UK
Job Responsibility
Job Responsibility
  • Supporting in the delivery of engaging and interactive lessons and educational activities
  • Supporting learners with SEN on a 1:1, small group and whole class basis
What we offer
What we offer
  • Free onsite parking
  • Shuttle bus from local train station
  • School networking events/ social events for teachers
  • Ready of supply of drinks, chocolate, biscuits and cakes in there welcoming and inviting staff room equally equipped with games, TV's and shared library
  • Brilliant resources and spacious classrooms/grounds
  • Career progression opportunities
  • Fully funded training and qualifications
  • Parttime
Read More
Arrow Right
New

Labourer

Are you a hardworking labourer looking for a new role in the East Riding? We are...
Location
Location
United Kingdom , Hull
Salary
Salary:
12.71 - 14.24 GBP / Hour
https://www.randstad.com Logo
Randstad
Expiration Date
June 11, 2026
Flip Icon
Requirements
Requirements
  • Valid CSCS card (Essential)
  • Previous experience working on new build housing sites
  • Full PPE (Hard hat, high-vis, steel toe boots)
  • A strong work ethic and the ability to work well within a team
  • Reliability and punctuality
  • Accessible for Kirk Ella (convenient for those in Willerby, Anlaby, and Hull)
Job Responsibility
Job Responsibility
  • Assisting various trades (Bricklayers, Joiners, etc.) with material distribution
  • Maintaining a clean and hazard-free site, including sweeping plots and clearing waste
  • Loading and unloading deliveries
  • Setting up and moving site fencing or equipment
  • Following the Site Manager's instructions to ensure daily targets are met
  • Adhering to all on-site health and safety regulations
  • Fulltime
Read More
Arrow Right
New

Secondary English Teacher

Secondary English Teacher | Catshill Salary: £140-233 per day Location: Catshi...
Location
Location
United Kingdom , Catshill
Salary
Salary:
140.00 - 233.00 GBP / Day
https://www.randstad.com Logo
Randstad
Expiration Date
June 06, 2026
Flip Icon
Requirements
Requirements
  • Hold a valid UK QTS Teaching qualification
  • Have a minimum of 1 year's experience teaching in a UK secondary school setting
  • Have a passion for education and a genuine desire to make a difference in the lives of children around the Birmingham area
Job Responsibility
Job Responsibility
  • Cover a range of teaching responsibilities
  • delivering engaging lessons
  • providing differentiated support
  • managing classroom behaviour
  • Be a confident and adaptable educator who can quickly grasp new information and integrate seamlessly into different school environments
  • Maintain a strong commitment to safeguarding and promoting the welfare of children
What we offer
What we offer
  • Flexible working - you set your own availability
  • Immediate supply bookings
  • Competitive rates of pay
  • A dedicated and supportive Education team
  • Established relationships with the schools you want to teach in
  • Referral Bonus
  • PAYE
  • Fulltime
Read More
Arrow Right
New

Sen Ta (Teaching Assistant)

Are you passionate about supporting young people who face challenges in mainstre...
Location
Location
United Kingdom , Kidderminster
Salary
Salary:
20877.00 - 23099.00 GBP / Year
https://www.randstad.com Logo
Randstad
Expiration Date
May 28, 2026
Flip Icon
Requirements
Requirements
  • Patient, understanding, and resilient individual with a passion for supporting young people
  • Experience working with challenging behaviour or SEN (desirable, but not essential)
  • Team player who can work closely with teachers, pastoral staff, and external agencies
  • GCSE in Maths and English or equivalent
Job Responsibility
Job Responsibility
  • Supporting pupils one-on-one or in small groups, helping them to engage with learning
  • Building positive relationships with students, offering encouragement and guidance
  • Assisting teachers in delivering tailored lessons that inspire and challenge pupils
  • Helping pupils develop confidence, resilience, and key life skills
  • Supporting pupils with social, emotional, and behavioural challenges
What we offer
What we offer
  • Ongoing professional development and career progression opportunities
  • A supportive team environment that values your contributions
  • The opportunity to be part of a forward-thinking and inclusive learning community
  • Fulltime
Read More
Arrow Right
New

1:1 Home Tutor - Reintegration Support (SEN Experience Required)

Job Title: 1:1 Home Tutor - Reintegration Support (SEN Experience Required) Loca...
Location
Location
United Kingdom , Worcester
Salary
Salary:
20.00 - 25.00 GBP / Hour
https://www.randstad.com Logo
Randstad
Expiration Date
August 15, 2026
Flip Icon
Requirements
Requirements
  • Ability to deliver face-to-face tuition in the home environment in WR5
  • Experience working with students with Moderate and Specific Learning Difficulties
  • Ability to teach Core Subjects at Key Stage 3 level
  • Sensitivity to safeguarding and social-emotional factors, particularly regarding recent community incidents
  • A responsible adult will be present during all tuition sessions
Job Responsibility
Job Responsibility
  • Provide face-to-face home tuition for a Year 10 female student
  • Focus on Core Subjects (English, Maths, and Science)
  • Deliver tuition as part of a parallel pathway following a permanent exclusion
What we offer
What we offer
  • Training and education
  • E-learning, access to assessment portal
  • Parttime
Read More
Arrow Right
New

Ks2 Teacher

Are you a passionate KS2 Teacher looking for teaching work that flexes with your...
Location
Location
United Kingdom , Bromsgrove
Salary
Salary:
140.00 - 233.00 GBP / Day
https://www.randstad.com Logo
Randstad
Expiration Date
June 11, 2026
Flip Icon
Requirements
Requirements
  • Hold a valid UK QTS Teaching qualification
  • Have a minimum of 1 year's experience teaching in a UK secondary school setting
  • Have a passion for education and a genuine desire to make a difference in the lives of children around the Birmingham area
Job Responsibility
Job Responsibility
  • Cover a range of teaching responsibilities
  • delivering engaging lessons
  • providing differentiated support
  • managing classroom behaviour
  • Be a confident and adaptable educator who can quickly grasp new information and integrate seamlessly into different school environments
  • Maintain a strong commitment to safeguarding and promoting the welfare of children
What we offer
What we offer
  • Flexible working - you set your own availability
  • Immediate supply bookings
  • Competitive rates of pay
  • A dedicated and supportive Education team
  • Established relationships with the schools you want to teach in
  • PAYE
  • Referral Bonus
  • training and education
  • Safeguarding & Prevent
  • Fulltime
Read More
Arrow Right
New

Specialist-one-to-one Study Skills Support Worker (supporting autistic students)

As a Specialist-one-to-one Study Skills Support Worker, you will provide learnin...
Location
Location
United Kingdom , Nottingham
Salary
Salary:
28.00 GBP / Hour
https://www.randstad.com Logo
Randstad
Expiration Date
June 11, 2026
Flip Icon
Requirements
Requirements
  • Qualified to undergraduate degree level (level 6 as minimum)
  • teaching qualification
  • extensive training in adult autism
  • 6 National Autistic Society Modules (non medical helper package)
  • The Optimum Training Course: Autism and ADHD in Higher Education: Recognising and addressing the barriers through Non-Medical Helper (NMH) Mentoring and Study Skills Strategies
  • Experience of working with autistic clients
  • Excellent interpersonal and communication skills
  • Punctuality and reliability
  • Good organisational skills
  • Ability to manage a caseload of students
Job Responsibility
Job Responsibility
  • Develop independence
  • Build on strengths and learning strategies
  • Create strategies around organisation and time management
  • Create action plans to stay on track with studies
  • Build on research skills - widening knowledge by using a variety of sources
  • Distinguish appropriate sources and how to correctly use references
  • Build on comprehension skills within reading and writing
What we offer
What we offer
  • Flexible working hours
  • £28 per hour plus accrued holiday pay at £3.38 per hour
  • Access to an online timesheet system
  • Engaged on a pay as you earn PAYE contract
  • Weekly payment for all approved timesheets
  • Join our Support Worker meetings & best practice sessions
  • Free Employee Assistance Helpline
  • Refer a friend scheme - unlimited cap on all successful referrals
  • Parttime
Read More
Arrow Right
New

Teaching Assistant

Being a teaching assistant is a life changing job! INSPIRE- Help to inspire the ...
Location
Location
United Kingdom , Worthing
Salary
Salary:
89.00 - 107.00 GBP / Day
https://www.randstad.com Logo
Randstad
Expiration Date
June 11, 2026
Flip Icon
Requirements
Requirements
  • Experience (voluntary or paid) working with children and young adults
  • GCSE Maths and English or equivalent
  • Eligibility to work in the UK
Job Responsibility
Job Responsibility
  • Supporting in the delivery of engaging and interactive lessons and educational activities
  • Supporting learners with SEN on a 1:1, small group and whole class basis
What we offer
What we offer
  • Free onsite parking
  • Shuttle bus from local train station
  • School networking events/ social events for teachers
  • Ready of supply of drinks, chocolate, biscuits and cakes in there welcoming and inviting staff room equally equipped with games, TV's and shared library
  • Brilliant resources and spacious classrooms/grounds
  • Career progression opportunities
  • Fully funded training and qualifications
  • Parttime
Read More
Arrow Right